TR2024019598T2 - METHOD FOR CONTROLLING UNWANTED PLANTS AND PROMOTING THE GROWTH OF USEFUL PLANTS - Google Patents

Abstract

A method for controlling unwanted plants and promoting the growth of beneficial plants, comprising applying an effective amount of thiaphenacil (a1) and an effective amount of at least one herbicidal compound selected from compound group A disclosed in the specification (a2) to unwanted plants, a site where unwanted plants are growing, or a site where beneficial plants are growing.

Description

DESCRIPTION METHOD FOR CONTROLING UNWANTED PLANTS AND PROMOTING THE GROWTH OF BENEFICIAL PLANTS TECHNICAL FIELD The present invention relates to a method for controlling unwanted plants and promoting the growth of beneficial plants, comprising applying an effective amount of tiafenacil (a1) and an effective amount of at least one herbicidal compound (a2) selected from compound group A below to unwanted plants, to a place where unwanted plants grow, or to a place where beneficial plants grow. STATE OF THE ART Patent Document 1 discloses a herbicidal composition comprising a uracil compound and other herbicidally active compound represented by a certain formula as active ingredients. Non-Patent Document 1 describes the herbicidal effects of a mixture of tiafenacil and metribuzin on glyphosate-resistant horseweed. Patent Document 2, Table 1-17, containing flumioxazin and tiafenacil, with a tiafenacil/flumioxazin weight ratio of 1/1. Describes an agricultural composition of 000 or less. However, these documents do not specifically disclose the method later described for controlling undesirable plants and promoting the growth of beneficial plants using the present invention. Patent Document 3 discloses a grass growth promoter comprising a compound having PPO inhibitory activity, a compound having VLCFA synthesis inhibitory activity, or a combination thereof, and a method for promoting the growth of grass. However, Patent Document 3 does not disclose tiafenacyl. In Non-Patent Document 2 and Non-Patent Document 3, the effects of tiafenacil on growth control or plant height when used alone on the beneficial plants bean and mint were confirmed, but these documents do not describe the growth-promoting effects of tiafenacil and other herbicide compounds when used together. Prior Art Documents Patent Documents Non-Patent Documents Non-PATENT Document 1: Weed Technology, 35, 817-823 Non-PATENT Document 2: Weed Technology, 35, 991-994 Non-PATENT Document 3: Weed Technology, 36, 729-732 BRIEF DESCRIPTION OF THE INVENTION Technical Problem Nowadays, mixture of various herbicides and use of herbicides in combination are used to control various undesirable plants, but some herbicide combinations have disadvantages such as not obtaining sufficient effect to control undesirable plants, the components in the combination weaken each other, and also the combination harms useful plants and deteriorates the growth or quality of useful plants. Under these circumstances, the object of the present invention is to provide a method for controlling undesirable plants and promoting the growth of beneficial plants. Solution to the Problem The present invention provides a method for controlling unwanted plants and promoting the growth of beneficial plants, comprising applying to unwanted plants, a place where unwanted plants grow, or a place where beneficial plants grow, an effective amount of thiafenacil (a1) and at least one herbicidal compound (a2) selected from the following compound group A: herbicidal compounds S-metolachlor, metribuzin, pyroxasulfone (pyroxasulfone), pethoxamid, tri-allate, and dimethenamid-P. The present invention also provides a mixture containing thiafenacyl (a1) and at least one herbicide compound (a2) selected from the above compound group A as active ingredients, with a weight ratio of (a1) to (a2) of 1:0. It provides an agricultural composition of between 8 and 1:1000 (hereinafter sometimes referred to as the composition of the present invention). The present invention also provides a combination of tiafenacil (a1) and the above compound group A as the active ingredient. In this specification, the composition of the present invention includes the above combination. Advantageous Effects of the Invention The composition of the present invention has excellent herbicidal effects against undesirable plants and growth-promoting effects on useful plants, which are not expected from the use of (a1) and (a2) alone. As a result, the dose of tiafenacil (a1) and/or the dose of at least one herbicidal compound (a2) selected from the following compound group A can be reduced, and thus the present invention is useful in actual use. DETAILED DESCRIPTION According to the present invention, unwanted plants can be controlled by applying an effective amount of thiafenacil (a1) and at least one herbicidal compound selected from the compound group A (a2) to unwanted plants, to a place where unwanted plants grow, or to a place where beneficial plants grow. Additionally, undesirable plants can be controlled by applying an effective amount of the composition of the present invention to undesirable plants, to a place where undesirable plants are growing, or to a place where beneficial plants are growing. According to the present invention, the growth of beneficial plants can be promoted by applying an effective amount of thiafenacil (a1) and at least one herbicidal compound selected from compound group A (a2) to unwanted plants, to a place where unwanted plants grow, or to a place where beneficial plants grow. Additionally, an effective amount of the composition of the present invention can be applied to unwanted plants, to a place where unwanted plants grow, or to a place where useful plants grow, to promote the growth of beneficial plants. To promote the growth of beneficial plants, an effective amount of tiafenacil (a1), the herbicide compound (a2) or the composition of the present invention can be applied to unwanted plants, to a place where unwanted plants grow, or to a place where beneficial plants are grown, before starting the cultivation of beneficial plants, such as before sowing seeds of beneficial plants or planting seedlings of beneficial plants. After application, the growth of beneficial plants is encouraged by sowing seeds or planting seedlings. The composition of the present invention contains thiafenacyl (a1) and at least one herbicidal compound (a2) selected from the following compound group A as active ingredients. Compound group A is a group consisting of S-metolachlor, metribuzin, pyroxasulfone, pethoxamide, tri-allate and dimethenamide-P herbicide compounds (a2). Among these, the herbicidal compound (a2) is preferably S-metolachlor, metribuzin, pyroxasulfone or tri-allate, more preferably S-metolachlor or metribuzin, or more preferably S-metolachlor, pyroxasulfone or tri-allate. The herbicide compound (a2) is also preferably S-metolachlor or pyroxasulfone or more preferably S-metolachlor or tri-allate and particularly preferably S-metolachlor. Thiafenacil (a1) and the herbicide compound (a2) are sometimes referred to as their salts, alkyl esters, hydrates, different crystal forms, various structural isomers, etc. may have and these are of course included in the present invention. The mixing weight ratio of Tiafenacil (a1) to the herbicidal compound (a2) of the present invention depends on the type of active ingredient formulation mixed, weather conditions and the type of undesirable plants to be controlled, their growth status, etc. It cannot be defined generally because it changes depending on various conditions such as. However, the (a1):(a2) mix weight ratio is usually 1:0. In one case of 8, the (a1):(a2) mixture weight ratio is more preferably 1:1. 2 to 1:180, more preferably in the case of metribuzin, the (a1):(a2) mix weight ratio is more preferably 1:1. It is between 2 and 1:88. In a case where the herbicide compound (a2) is pyroxasulfone, in a case where it is (a1):(a2), the (a1):(a2) mixture weight ratio is more preferably from 1:7 to 1:200, in a case where it is (a2) pethoxamid, the (a1):(a2) mixture weight ratio is more preferably from 1:8. In a case where the herbicide compound (a2) is dimethenamid-P, the (a1):(a2) mixture weight ratio is from 1:120 to 1:120. In the method of this invention, the doses of thiafenacil (a1) and herbicide compound (a2) are determined by various factors such as the type of active ingredient formulation mixed, weather conditions and the type of undesirable plants to be controlled, their growth status, etc. Since it varies depending on various conditions such as, it cannot be defined in general. However, the dose of (a1) is generally between 0.01 and 400 g per hectare, preferably in a case where the herbicidal compound (a2) is S-metolachlor, the dose is more preferably in the range of 0.01 to 400 g per hectare. In a case where the herbicidal compound (a2) is metribuzin, the dose is more preferably in the range of 0.01 to 400 g per hectare. In a case where the herbicidal compound (a2) is pyroxasulfone, the dose is more preferably in the range of 0.01 to 400 g per hectare. In a case where the herbicidal compound (a2) is tri-allate, the dose is more preferably in the range of 10 g per hectare. In a case where the compound (a2) is dimethenamid-P, the dose is more preferably in the range of 0.01 to 400 g per hectare. When the composition of the present invention is applied to unwanted plants, a place where unwanted plants grow, or a place where useful plants grow, it shows excellent controlling effects on unwanted plants and promotes the growth of useful plants. This includes various non-agricultural areas such as parkland, cemeteries, residential areas, embankments, gardens, parks, forests, roads, farm roads, fields and factory sites, and agricultural areas such as crop fields, orchards, berry fields and lawns. In particular, the composition of the present invention is preferably applied to an agricultural field or a place where useful plants will be grown in the future. Cultivation means a series of actions starting from planting the seed, sowing the seed or planting the vegetative reproductive organ of useful plants to produce a harvest of useful plants. It also means the seed, seed or seedling in question. The application method of the composition of the present invention is appropriately selected from soil tillage, leaf tillage, water tillage, and the like. The application time of the composition of the present invention is appropriately selected from after harvesting the useful plants to before the next planting and after planting to before the budding of the useful plants. In case of soil application, the dose (a1) is preferably 0.01 to 400 g per hectare, more preferably 1 to 4000 g. In case of foliar application, the dose (a1) is preferably applied to hectares. Soil tillage is a method of applying the composition of the present invention to soils before the budding of useful plants or undesirable plants. By applying the composition of the present invention through soil treatment, a layer treated with the composition of the present invention is formed on the soil surface, and the effects of the composition of the present invention are demonstrated to each plant. Foliar application is a method of applying the composition of the present invention to the leaves of plants after the beneficial plants or undesirable plants have budded. By applying the composition of the present invention via foliar application, the ingredients are absorbed from or brought into contact with the leaves, and the effects of the composition of the present invention are exerted on each plant. Water treatment is the method of applying the composition of the present invention to a flooded paddy field where beneficial plants are growing or undesirable plants are growing. By applying the composition of the present invention to water treatment, the effects of the composition of the present invention are demonstrated to each plant. In each of the above embodiments, the composition of the present invention is diluted to a predetermined concentration, for example with water, and sprayed with a sprayer onto unwanted plants, a place where unwanted plants grow, or a place where beneficial plants grow. Additionally, a flying device such as an automated helicopter or drone, a power dispersant, or a boom sprayer may be used. In each of the above embodiments, the dosage of the composition of the present invention is such that the above mixing ratio of tiafenacil (a1) and the herbicide compound (a2) or the dosages of the respective components are applied. In the present invention, "promoting the growth of useful plants" (hereinafter sometimes means increasing the number of healthy leaves, increasing the height of the plant, increasing the growth of roots or root density, increasing the number or weight of seeds or fruits, or increasing the number of flowers or number of fruits. The composition of the present invention is particularly suitable for increasing the weight of the plant and/or the weight of the seeds. Growth promotion can be measured and evaluated by the following method. (1) Evaluation by weight of plant The above-ground part of each useful plant is cut and its weight is measured to obtain the raw weight, or the cut sample is dried and its weight is measured to obtain the dry weight. (2) Evaluation according to the area of leaves The leaves of each useful plant are collected and the total area of leaves measures one leaf area (3) Evaluation according to the number of healthy leaves The number of healthy leaves of each useful plant is counted. (4) Evaluation according to plant height The above-ground part of each useful plant is held vertically and the height from the soil surface to the highest position is measured. (5) Evaluation according to root growth or root density The roots of each useful plant are dug and their weight is measured to obtain the raw weight, or the obtained sample roots are dried and their weight is measured to obtain the dry weight. (6) Evaluation by number or weight of seeds or fruits Seeds or fruits of each useful plant are collected and their number is counted or their weight is measured to obtain the total weight or average. (7) Evaluation according to the number of flowers or number of fruits The number of flowers or number of fruits of each useful plant is counted. The composition of the present invention can be used to control or inhibit the growth of undesirable plants, such as barnyard grass (Echinochloa crus-galli, Echinochloa oryzicola), southern crabgrass (Digitaria ciliaris, Digitaria adscendens), large black bastgrass (Digitaria sanguinalis), smooth crabgrass (Digitaria ischaemum), East India crabgrass (Digitaria microbachne), Jamaican crabgrass (Digitaria horizontalis), green foxtail (Setaria viridis), giant foxtail (Setaria faberi), yellow foxtail (Setaria lutescens), goose grass (Eleusine indica), wild oats (Avena fatua), johnsongrass (Sorghum halepense), quackgrass (Agropyron repens), feathery signal grass (Urochloa villosa), alexandergrass (Brachiaria plantaginea), guineagrass. (Panicum maximum), paragrass (Panicum purpurascens), Chinese sprangletop (Leptochloa chinensis), red sprangletop (Leptochloa panicea), annual bluegrass (Poa annua), short-haired foxtail (Alopecurus aequalis), black grass (Alopecurus myosuroides), cholorado bluestem (Agropyron tsukushiense), broad-leaved signal grass. (Brachiaria platyphylla), southern dune grass (Cenchrus echinatus), Italian grass (Lolium multiflorum), bermuda grass (Cynodon dactylon), violet crabgrass (Digitaria violascens), knotweed (Paspalum distichum), little quakinggrass (Briza minor), sweet vernalgrass (Anthoxanthum odoratum), autumn panicum (Panicum). dichotomiflorum), shattercane (Sorghum bicolor) and American Poaceae weeds such as sloughgrass (Beckmannia syzigachne); Brass sedge (Cyperus iria), purple sedge (Cyperus rotundus), yellow sedge (Cyperus esculentus), tidal marsh sedge (Cyperus serotinus), small-flowered umbrella sedge (Cyperus difformis), needle thistle (Eleocharis acicularis), water chestnut (Eleocharis). kuroguwai), green kyllinga (Kyllinga brevifolia var. leiolepis), Schoenoplectus nipponicus, cosmopolitan bulrush (Bolboschoenus koshevnikovii), amur cyperus (Cyperus microiria) and rock bulrush (Schoenoplectus juncoides); . Alismataceae weeds such as Japanese ribbon waparo (Sagittaria pygmaea), arrowhead (Sagittaria trifolia), and channel waterweed (Alisma canaliculatum); Pontederiaceae weeds such as heart-shaped false pickle (Monochoria vaginalis) and korsakow monochoria (Monochoria korsakowii); Lythraceae weeds such as Indian disot (Rotala indica) and jerry-jerry (Ammannia multiflora); Elatinaceae weeds such as long-stemmed waterweed (Elatine triandra); Malvaceae weeds such as velvetleaf (Abutilon theophrasti), prickly sida (Sida spinosa), volunteer cotton (Gossypium hirsutum), common mallow (Malva neglecta), small mallow (Malva parviflora) and Venice mallow (Hibiscus trionum); Horsetail (Xanthium strumarium), ragweed (Ambrosia artemisiifolia), thistle (Breea setosa), downy galinsoga (Galinsoga ciliata), wild chamomile (Matricaria chamomilla), scentless chamomile (Tripleurospermum maritimum), may chamomile (Anthemis cotula), downy pyrethrum (Conyza). bonariensis), tall pyrethrum (Conyza sumatrensis), tall goldenrod (Solidago altissima), prickly lettuce (Lactuca serriola), philadelphia pyrethrum (Erigeron philadelphicus), annual pyrethrum (Erigeron annuus), common ground grass (Senecio vulgaris), giant ragweed (Ambrosia trifida), horseweed (Conyza canadensis), dandelion (Taraxacum officinale), devil's herb Asteraceae weeds, such as (Bidens frondosa), beggar's weed (Bidens biternata), feathery fescue (Bidens pilosa), narrow-leaved hawksbeard (Crepis tectorum), Santa Maria fireweed (Parthenium hysterophorus), prickly thistle (Sonchus asper), annual thistle (Sonchus oleraceus), volunteer sunflower (Helianthus annuus), Canada thistle (Cirsium arvense), and clayey aster (Acanthospermum hispidum); black nightshade (Solanum nigrum), jimsonweed (Datura stramonium), cutleaf groundcherry (Physalis angulate var. angulata), horsenettle (Solanum carolinense), cut-leaf nightshade (Solanum triflorum), eastern black nightshade (Solanum ptycanthum), and hairy nightshade (Solanum sarrachoides); slender amaranth (Amaranthus viridis), redroot pigweed (Amaranthus retroflexus), live amaranth (Amaranthus blitum). Japanese strawflower (Achyranthes bidentata var. japonica), palmer amaranth (Amaranthus palmeri), kochia (Bassia scoparia), smooth pigweed (Amaranthus hybridus), slender amaranth (Amaranthus viridis), powell's amaranth (Amaranthus powellii), spiny amaranth (Amaranthus spinosus), clammy goosefoot (Dysphania pumilio), common lambsquarters (Chenopodium album), fat hen (Chenopodium album var. centrorubrum), narrow-leaved goosefoot (Chenopodium pratericola), hanging pigweed (Amaranthus blitoides), Russian thistle (Salsola sp. ) and Amaranthaceae weeds such as waterhemp (Amaranthus tuberculatus); pale wisent (Polygonum lapathifolium), ladysthumb (Polygonum persicaria), wild buckthorn (Polygonum convolvulus), knotweed (Polygonum aviculare), pale wisent (Persicaria Iapathifolia var. Iapathifolia), . Japanese knotweed (Fallopia japonica), oriental lady's thumb (Persicaria longiseta), sheep sorrel (Rumex acetosella subsp. pyrenaicus), Thunberg knotweed (Persicaria thunbergii), Nepalese smartweed (Persicaria nepalensis), Japanese dock (Rumex japonicus), and Pennsylvania smartweed (Persicaria pensylvanica); flexible bitterweed (Cardamine flexuosa), shepherd's purse (Capsella bursa-pastoris), Indian mustard (Brassica juncea), variable-leaf yellowweed (Rorippa indica), swamp yellowweed (Rorippa palustris), volunteer canola (Brassica spp. ), small-seeded false flax (Camelina microcarpa), flixweed (Descurainia sophia), black mustard (Brassica nigra), tumble mustard (Sisymbrium altissimum), wild mustard (Sinapis arvensis), field pennycress (Thlaspi arvense), London rocket (Sisymbrium irio), and pinnate tansymustard (Descurainia pinnata); Brassicaceae weeds such as tall morning glory (Lpomoea purpurea), field bindweed (Calystegia arvensis), ivy-leaved morning glory (Lpomoea hederacea), whole-leaved morning glory (Lpomoea hederacea var. integriuscula), Convolvulaceae weeds such as palmate morning glory (Ipomoea wrightii) and cupped morning glory (Ipomoea lacunosa); Portulacaceae weeds such as purslane (Portulaca oleracea); sickleaf weed (Cassia obtusifolia), red clover (Trifolium pratense), narrow-leaved fig (Vicia sativa subsp. nigra is present. segetalis), white clover (Trifolium repens), small fig (Vicia hirsuta), volunteer clover (Medicago sativa), black clover (Medicago lupulina), common lespedeza (Kummerowia striata), suckling clover (Trifolium dubium), bird's foot clover (Lotus corniculatus var. japonicus), Florida begganNeed (Desmodium tortuosum) and hemp sesbania (Sesbania herbacea); Common chickweed (Stellaria media), water chickweed (Stellaria aquatica), sticky chickweed (Cerastium glomeratum), . Japanese pearl grass (Sagina japonica), marsh bird grass, marsh star grass (Stellaria uliginosa var. undulata), pot marigold (Calendula officinalis) and mullein (Vaccaria hispanica); Lamiaceae weeds such as Balliaceae (Lamium amplexicaule) and purple nettle (Lamium purpureum); Rubiaceae weeds such as ragweed (Galium spurium), yaki weed (Galium aparine) and Florida hazelnut (Richardia scabra); Euphorbiaceae weeds such as three-seeded copperleaf (Acalypha australis), spotted euphorbia (Euphorbia maculata), texasweed (Caperonia palustris) and Virginia copperleaf (Acalypha virginica); Commelinaceae weeds such as Asian sunflower (Commelina communis); Linderniaceae weeds, such as common false pimpernel (Lindernia procumbens), false pimpernel (Lindernia dubia subsp. major), false pimpernel (Lindernia dubia subsp. dubia) and (Lindernia micrantha); Plantaginaceae weeds such as Dopatrium (Dopatrium junceum), Gratiola japonica), Asiatic plantain (Plantago asiatica), Persian speedwell (Veronica persica), and corn speedwell (Veronica arvensis); Molluginaceae weeds such as halibut (Mollugo verticillata); Onagraceae weeds such as cutleaf axecephala (Oenothera iaciniata) and American willow (Epilobium ciliatum); Geraniaceae weeds such as red-stemmed filaree (Erodium cicutarium); Apiaceae weeds such as poison hemlock (Conium maculatum); Urticaceae weeds such as nettle (Urtica urens); Zygophyllaceae weeds such as puncturevine (Tribulus terrestris); and Cucurbitaceae weeds such as Burcucumber (Sicyos angulatus). The composition of the present invention can be suitably used to control or inhibit the growth of undesirable plants, for example, Poaceae weeds such as barnyard grass (Echinochloa crus-galli, Echinochloa oryzicola), southern crabgrass (Digitaria ciliaris, Digitaria adscendens), large crabgrass (Digitaria sanguinalis), smooth crabgrass (Digitaria ischaemum), East Indian crabgrass (Digitaria microbachne), Jamaican crabgrass (Digitaria horizontalis), giant foxtail (Setaria faberi), goosegrass (Eleusine indica), wild oats (Avena fatua), Chinese sprangleball (Leptochloa chinensis), annual bluegrass (Poa annua), shorthair foxtail (Alopecurus aequalis), blackgrass (Alopecurus myosuroides), Italian ryegrass (Lolium multiflorum), violet crabgrass (Digitaria violascens), autumn panicum (Panicum dichotomiflorum) and American sloughgrass (Beckmannia syzigachne); Purple sedge (Cyperus rotundus), yellow sedge (Cyperus esculentus) and green kyllinga (Kyllinga brevifolia var. Cyperaceae weeds such as leiolepis); Malvaceae weeds such as Velvetleaf (Abutilon theophrasti); Asteraceae weeds, such as common ragweed (Ambrosia artemisiifolia), downy galinsoga (Galinsoga ciliata), tall pyrethrum (Conyza sumatrensis), philadelphia pyrethrum (Erigeron philadelphicus) and dandelion (Taraxacum officinale); Solanaceae weeds such as black nightshade (Solanum nigrum); Redroot pigweed (Amaranthus retroflexus), Powell's amaranth (Amaranthus powellii), livid amaranth (Amaranthus blitum), palmer amaranth (Amaranthus palmeri), tender pigweed (Amaranthus hybridus), slender amaranth (Amaranthus viridis), prickly amaranth (Amaranthus spinosus), kochia (Bassia scoparia), common lamb's lettuce (Chenopodium album), fat grouse (Chenopodium album var. centrorubrum) and Amaranthaceae weeds such as waterhemp (Amaranthus tuberculatus); pale wisent (Polygonum lapathifolium), pale wisent (Persicaria Iapathifolia var. nepalensis); Brassicaceae weeds such as flexible bittercress (Cardamine flexuosa), shepherd's purse (Capsella bursa-pastoris) and swamp yellow cress (Rorippa palustris); Convolvulaceae weeds such as tall morning glory (Lpomoea purpurea), ivy-leaved morning glory (Lpomoea hederacea), field bindweed (Convolvulus arvensis) and seedless morning glory (Lpomoea lacunosa); Portulacaceae weeds such as purslane (Portulaca oleracea); Narrow-leaved fig (Vicia sativa subsp. nigra is present. segetalis) and common Iespedeza (Kummerowia striata); Lamiaceae weeds such as common chickweed (Stellaria media) and sticky chickweed (Cerastium glomeratum); Rubiaceae weeds such as yaki weed (Galium spurium); Commelinaceae weeds such as Asian sunflower (Commelina communis); and Plantaginaceae weeds such as Persian speedwell (Veronica persica). The composition of the present invention is useful for controlling or inhibiting the growth of undesirable plants, such as Poaceae weeds, Cyperaceae weeds, Malvaceae weeds, Asteraceae weeds, Solanaceae weeds, Amaranthaceae weeds, Polygonaceae weeds, Brassicaceae weeds, Convolvulaceae weeds, Fabaceae weeds, Caryophyllaceae weeds, Lamiaceae weeds, Rubiaceae weeds, Commelinaceae weeds and Plantaginaceae weeds. The composition of the present invention is more useful for controlling or inhibiting the growth of unwanted plants, such as Poaceae weeds, Asteraceae weeds and Amaranthaceae weeds. The composition of the present invention is particularly useful for controlling or inhibiting the growth of undesirable plants such as Italian ryegrass (Lolium multiflorum), goose grass (Eleusine indica), waterhemp (Amaranthus tuberculatus) and horse grass (Conyza canadensis). The composition of the present invention is used in growing water utilizing plants to control or inhibit the growth of the above undesirable plants, e.g. grass, soybean (Glycine max), alfalfa (Medicago sativa), chickpea (Cicer arietinum), pea (Pisum sativum), lentil (Lens culinaris), cotton (Gossypium spp. ) wheat (Triticum aestivum), rice (Oryza sativa), barley (Hordeum vulgare), rye (Secale cereale), oats (Avena sativa), corn (Zea mays), sorghum (Sorghum spp.). ), Chinese rapeseed (Brassica rapa var. nippo-oleifera), canola (Brassica napus), sunflower (Helianthus annuus), sugar beet (Beta vulgaris ssp. vulgaris, Beta vulgaris var. saccharifera, Beta vulgaris var. hortensis), sugar cane (Saccharum officinarum), peanut (Arachis hypogaea), flax (Linum usitatissimum), tabaco (Nicotiana tabacum) and coffee (Coffea arabica). Therefore, the composition of the present invention is preferably used in a place where the above beneficial plants grow or in a place where the above beneficial plants are cultivated. The composition of the present invention is particularly used where useful plants such as grass, soybean, cotton, wheat, rice, corn, Chinese rapeseed, canola, sunflower, sugar beet, sugar cane, peanut, flax, tabasco or coffee grow or where useful plants are cultivated. The composition of the present invention is preferably used in a place where useful plants grow or in a place where useful plants such as grass, soybeans, wheat, rice or corn are grown. The composition of the present invention is more preferably used in a place where beneficial plants such as soybeans, wheat, rice or corn grow or where beneficial plants are cultivated. Beneficial plants include plants that have been developed to resist a herbicide by conventional breeding methods, for example, an HPPD inhibitor such as isoxaflutole, an ALS inhibitor such as imazethapyr or thifensulfuron-methyl, an EPSP synthase inhibitor such as glyphosate, a glutamine synthase inhibitor such as glufosinate, an acetyl CoA carboxylase inhibitor such as sethoxydim, bromoxynil, dicamba, or 2,4-D. Beneficial plants may be, for example, particularly imidazolinone herbicide-resistant corn and canola varieties (trade name: Clearfield) and STS soybeans resistant to sulfonylurea ALS inhibitor-type herbicides. Useful plants include transgenic plants produced by gene modification. Examples of transgenic plants include herbicide-resistant transgenic plants, pest-resistant transgenic plants, plant component-related transgenic plants, and phytopathogen-resistant transgenic plants. Additionally, useful plants include stacked varieties that incorporate the useful characters of such transgenic plants. The composition of the present invention can be effectively used to selectively control undesirable plants or inhibit their growth in the cultivation of various transgenic plants of the above useful plants (such as soybean, cotton, rapeseed, and corn). Herbicide-resistant transgenic plants include glyphosate-resistant maize, soybean, cotton, canola (rapeseed) and sugar beet; glufosinate-resistant maize, soybean, cotton and rapeseed; and bromoxynil-resistant cotton. Transgenic plants resistant to pests include, for example, plants that have acquired the ability to synthesize toxins known to be synthesized by the genus Bacillus. Toxins synthesized by transgenic plants confer resistance to plants, particularly against Coleoptera insects, Hemiptera insects, Diptera insects, Lepidoptera insects and nematodes. The above toxins include insecticidal proteins derived from Bacillus cereus and Bacillus popilliae; β-endotoxins such as Cry1Ab, Cry1Ac, Cry1F, Cry1Fa2, Cry2Ab, Cry3A, CryBBb1, and CryQC derived from Bacillus thuringiensis; insecticidal proteins such as VlP1, VlP2, VlP3, and VlP3A; insecticidal proteins from nematodes; animal-produced toxins such as scorpion toxin, spider toxin, bee toxin, and insect-specific neurotoxin; filamentous fungal toxin; plant lectin; agglutinin; protease inhibitors such as trypsin inhibitor, serine protease inhibitor, patatin, cystatin, and papain inhibitor; Ribosome-inactivating proteins (RIP) such as ricin, misir-RIP, abrin, luffin, saporin, and bryodin; steroid-metabolizing enzymes such as 3-hydroxysteroid oxidase, ecdysteroid-UDP-glucosyltransferase, and cholesterol oxidase; ecdysone inhibitor; HMG-CoA reductase; ion channel blockers such as sodium channel blocker and calcium channel blocker; juvenile hormone esterase; diuretic hormone receptor; stilbene synthase; bibenzyl synthase; chitinase; and glucanase. They also include hybrid toxins of β-endotoxin proteins such as Cry35Ab and insecticidal proteins such as VlP1, VlP2, VlP3 and VlP3A, toxins lacking some of these, and modified toxins. Transgenic plants related to plant components include plants with altered oil components or increased amino acid content. Phytopathogen-resistant transgenic plants include plants that have been endowed with the ability to produce anti-pathogenic substances with selective action. The transgenic plants are not particularly limited and include, for example, glyphosate-resistant maize, soybean, cotton, rapeseed and sugar beet varieties (trade name: RoundupReady, Agrisure, Gly-Tol); glufosinate-resistant maize, soybean, cotton and rapeseed varieties (trade name: LibertyLink); bromoxynil-resistant cotton variety (trade name: BXN); maize and soybean varieties resistant to both glyphosate and ALS inhibitors (trade name: Optimum, GAT) BXN); maize and soybean varieties resistant to both glyphosate and ALS inhibitors (trade name: Optimum, GAT); imidazolinone compound-resistant variety (trade name: lMl); Maize variety expressing Cry1Ab toxin (commercial name: YieldGard); Maize variety expressing CryBBb1 toxin (commercial name: YieldGard Rootworm); Maize variety expressing Cry1Ab and CryBBb1 toxins (commercial name: YieldGard Plus); Maize variety expressing Cry1Fa2 toxin and phosphinothricin N-acetyltransferase (PAT) to confer resistance to glufosinate (commercial name: Herculex I); Cotton variety expressing Cry1Ac toxin (commercial name: NuCOTNBBB, Bollgard I); Cotton variety expressing Cry1Ac and Cry2Ab toxins (commercial name: Bollgard II); Cotton variety expressing VlP toxin (commercial name: VlPCOT); a maize variety (Herculex I) expressing the Cry1Fa2 toxin and phosphinothricin N-acetyltransferase (PAT) to confer resistance to glufosinate; a variety with the GA21 glyphosate-resistant trait (trade name: NatureGard Agrisure GT Advantage); a variety with the Bt11 corn borer (CB) trait (trade name: Agrisure CB Advantage); a low-linolenic acid soybean variety with reduced linolenic acid content (trade name: VlSTlVE); and a maize variety with increased lysine or oil content. The composition of the present invention containing tiafenacil (a1) and the herbicidal compound (a2) together exerts higher effects that persist for a long period of time, as shown in the Examples described later, compared to a case where the respective active ingredients are applied separately. Therefore, in practical application, for example, the effects of agricultural composition, the effect of rainfall or temperature after application, etc. It is very useful in an application where it can be reduced with . In the present invention, the composition of the present invention can also be mixed with other herbicide compounds as the case may be. Such other herbicidal compounds can be appropriately selected from various known herbicidal compounds, taking into consideration the application of the composition of the present invention, the type and growth state of undesirable plants to be controlled, and the like. Moreover, the composition of the present invention can be mixed or used with a fungicide, an antibiotic, a plant hormone, an insecticide, a fertilizer, a preservative or the like, so that more excellent effects or functions can be obtained in some cases. Such other herbicidal compounds include, for example, the following compounds (common names), and one component or two or more components can be selected appropriately. Here, a different herbicidal compound from herbicidal compound (a2) is selected as the other herbicidal compound to be further mixed. That is, in a case where the herbicide compound (a2) is metribuzin, a compound other than metribuzin is selected as the other herbicide compound to be further mixed. DB-dimethylammonium, 2,4-DB-isoctyl, 2,4-DB-potassium, 2,4-DB-sodium, 2,4-D choline salt, dichlorprop, dichlorprop-butotyl, dichlorprop-dimethylammonium, dichlorprop-isoctyl, dichlorprop-potassium, dichlorprop-P, dichlorprop-P-dimethylammonium, dichlorprop-P- potassium, dichlorprop-P-sodium, MCPA, MCPA-butotyl, MCPA-dimethylammonium, MCPA-2-ethylhexyl, MCPA-potassium, MCPA-sodium, MCPA-thioethyl, MCPB, MCPB- ethyl, MCPB-sodium, mecoprop, mecoprop-butotyl, mecoprop-sodium, mecoprop-P, mecoprop-P-butotyl, compounds that are believed to have herbicidal effects by disrupting the hormone activities of plants, such as mecoprop-P-dimethylammonium, mecoprop-P-2-ethylhexyl, mecoprop-P-potassium, naproanilide, clomeprop and phenoxy compounds such as HlA-1; 2,3,6-TBA, dicamba, dicamba-butotyl, dicamba-diglycolamine, dicamba-dimethylammonium, dicamba-diolamine, dicamba-isopropylammonium, dicamba-potassium, dicamba-sodium, picloram, picloram-dimethylammonium, picloram-isoctyl, picloram-potassium, picloram- triisopropanolammonium, picloram-triisopropylammonium, picloram-trolamine, triclopyr, triclopyr-butotyl, triclopyr-triethylammonium, clopyralid, clopyralid-olamine, clopyralid-potassium, clopyralid-triisopropanolammonium, aminopyralid, aminocyclopyrachlor, halauxifen, halauxifen-methyl, aromatic carboxylic acid compounds such as indolauxipyr and BAS-534; and others such as naptalam, naptalam-sodium, benazoline, benazoline-ethyl, quinclorac, quinmerac, diflufenzopyr, diflufenzopyr-sodium, fluroxypyr, fluroxypyr-2-butoxy-1-methylethyl, fluroxypyr-meptyl, chlorflurenol, chlorflurenol-methyl, clacyfos and fluchloraminopyr. compounds. (2) Urea compounds such as chlorotoluron, diuron, fluometuron, linuron, isoproturon, metobenzuron, tebuthiuron, dimefuron, isouron, carbutylate, methabenzthiazuron, metoxuron, metoburomuron, monolinuron, neburon, and siduron; triazine compounds such as terbumeton, trietazine, simazine, atrazine, atratone, simetryn, prometryn, dimethametryn, terbuthylazine, cyanazine, ametryn, cybutryne, terbutryn, propazine, metamitron, and prometon; triazinone compounds such as hexazinone, metribuzin, and metamitron; uracil compounds such as bromacil, bromacil-lithium, lenasil, and terbacil; anilide compounds such as propanil, cypromid, tetflupyrolimet, and pentanochlor; carbamate compounds such as desmedipham and phenmedipham; hydroxybenzonitrile compounds such as bromoxynil, bromoxynil-octanoate, bromoxynil-heptanoate, ioxynil, ioxynil-octanoate, ioxynil-potassium, and ioxynil-sodium; and other compounds such as pyridate, bentazone, bentazone-sodium, amicarbazone, methazole, and chloridazon, which are believed to exert herbicidal effects by inhibiting plant photosynthesis. (3) Quaternary ammonium salt compounds such as paraquat and diquat are thought to spontaneously transform into free radicals to form active oxygen in the plant body and exhibit rapid herbicide activity. (4) Compounds believed to exhibit herbicidal effects by inhibiting the chlorophyll biosynthesis of plants and abnormally accumulating a photosensitizing peroxide substance in the plant body, such as diphenylether compounds such as nitrofen, chlomethoxyfen, bifenox, acifluorfen, acifluorfen-sodium, fomesafen, fomesafen-sodium, oxyfluorfen, lactofen, aclonifen, ethoxyfen-ethyl, fluoroglycofen-ethyl, and fluoroglycofen; cyclic imide compounds such as chlorphthalim, flumioxazin, flumiclorac, flumiclorac-pentyl, cinidon-ethyl, fluthiacet-methyl, and EK-5385; and oxadiargyl, oxadiazon, sulfentrazone, carfentrazone-ethyl, thidiazimin, pentoxazone, azafenidine, pyraflufen-ethyl, benzfendizone, butafenacil, saflufenacil, epyrifenacil, fluazolate, profluazole, flufenpyr-ethyl, bencarbazone, pyraclonil, cyclopyranil, trifludimoxazine and other compounds such as flufenoximacil. (5) Pyridazinone compounds such as norflurazone and metflurazone; pyrazole compounds such as pyrazolinate, pyrazoxyfen, benzofenap, topramezone, cypyrafluone, bipyrazone, tolpyralate and pyraquinate; and other compounds such as amitrole, fluridone, flurtamone, diflufenican, methoxyphenone, clomazone, broclozone, bixlozone, mesotrione, tembotrione, tefuryltrione, fenquinotrione, compounds characterized by bleaching activity by inhibiting the chromogenesis of plants such as cyclopyrimorate, difenzoquat, difenzoquat-methylsulfate, isoxachlortole, benzobicyclon, bicyclopyrone, picolinafen, beflubutamide, ketospiradox, ketospiradox-potassium and flusulfinam, and carotenoids such as cyclopyrimorate, difenzoquat, difenzoquat-methylsulfate, isoxachlortole, benzobicyclon, bicyclopyrone, picolinafen, beflubutamide, ketospiradox, ketospiradox-potassium, and flusulfinam, which are believed to exert herbicidal effects. (6) Aryloxyphenoxypropionic acid compounds such as diclofop-methyl, diclofop, pirifenop-sodium, fluazifop-butyl, fluazifop, fluazifop-P, fluazifop-P-butyl, haloxyfop-methyl, haloxyfop, haloxyfop-ethotyl, haloxyfop-P, haloxyfop-P-methyl, quizalofop-ethyl, quizalofop-P, quizalofop-P-ethyl, quizalofop-P-tefuryl, cyhalofop-butyl, fenoxaprop-ethyl, fenoxaprop- P, fenoxaprop-P-ethyl, clodinafop-propargyl, clodinafop, propaquizafop, HNPC-A8169 and SYP-1924; Compounds believed to exert herbicidal effects on plants by inhibiting fatty acid biosynthesis, such as cyclohexanedione compounds, such as alloxydim-sodium, alloxydim, clethodim, sethoxydim, tralkoxydim, butroxydim, tepraloxydim, profoxydim, and cycloxydim; and phenylpyrazoline compounds, such as pinoxaden. (7) Compounds believed to have herbicidal effects by inhibiting the biosynthesis of an amino acid in plants, such as sulfonylurea compounds such as chlorimuron-ethyl, chlorimuron, sulfometuron-methyl, sulfometuron, primisulfuron-methyl, primisulfuron, bensulfuron-methyl, bensulfuron, chlorsulfuron, metsulfuron-methyl, metsulfuron, cinosulfuron, pyrazosulfuron-ethyl, pyrazosulfuron, flazasulfuron, rimsulfuron, nicosulfuron, imazosulfuron, flucetosulfuron, cyclosulfamuron, prosulfuron, flupyrsulfuron-methyl-sodium, flupyrsulfuron, triflusulfuron-methyl, triflusulfuron, halosulfuron-methyl, halosulfuron, thifensulfuron-methyl, thifensulfuron, ethoxysulfuron, oxasulfuron, ethametsulfuron, ethametsulfuron-methyl, iodosulfuron, iodosulfuron-methyl-sodium, sulfosulfuron, triasulfuron, tribenuron-methyl, tribenuron, tritosulfuron, foramsulfuron, trifloxysulfuron, trifloxysulfuron-sodium, mesosulfuron-methyl, mesosulfuron, orthosulfamuron, amidosulfuron, azimsulfuron, propyrisulfuron, metasulfuron, methiopyrsulfuron, monosulfuron-methyl, iofensulfuron and iofensulfuron-sodium; triazolopyrimidinesulfonamide compounds such as flumetsulam, metosulam, dimesulfazet, diclosulam, cloransulam-methyl, florasulam, penoxsulam and pyroxsulam; imidazolinone compounds such as imazapyr, imazapyr-isopropylammonium, imazethapyr, imazethapyr-ammonium, imazaquin, imazaquin-ammonium, imazamox, imazamox-ammonium, imazamethabenz, imazamethabenz-methyl and imazapic; pyrimidinylsalicylic acid compounds such as pyrithiobac-sodium, bispyribac-sodium, pyriminobac-methyl, pyribenzoxim, pyriftalide and pyriflubenzoxim; sulfonylaminocarbonyltriazolinone compounds such as flucarbazone, flucarbazone-sodium, propoxycarbazone-sodium, propoxycarbazone and thiencarbazone-methyl; sulfoneanilide compounds such as pyrimisulfan and triafamone; and other compounds such as glyphosate, glyphosate-sodium, glyphosate-potassium, glyphosate-ammonium, glyphosate-diammonium, glyphosate-isopropylammonium, glyphosate-trimesium, glyphosate-sesquisodium, glufosinate, glufosinate-ammonium, glufosinate-P, glufosinate-P-ammonium, glufosinate-P-sodium, bilanafos, bilanafos-sodium and cinmethylin. (8) Dinitroaniline compounds such as trifluralin, oryzalin, nitralin, pendimethalin, ethalfluralin, benfluralin, prodiamine, butralin, and dinitramine; amide compounds such as bensulide, napropamide, napropamide-M, propyzamide, pronamide, and beflubutamide-M; organic phosphorus compounds such as amiprophos-methyl, butamifos, anilofos, and piperophos; phenyl carbamate compounds such as propham, chlorpropham, barban, and carbetamide; cumylamine compounds such as daimuron, cumyluron, bromobutide, and methyldymron; and other compounds such as dithiopyr, thiazopyr, chlorthal-dimethyl, chlorthal, diphenamid, flamprop-M-methyl, flamprop-M, flamprop-M-isopropyl, and swep, which are believed to exert herbicidal effects by inhibiting plant cell mitosis. (9) Chloroacetamide compounds such as alachlor, metazachlor, butachlor, pretilachlor, metolachlor, S-metolachlor, thenylchlor, pethoxamid, acetochlor, propachlor, dimethenamide, dimethenamide-P, propisochlor and dimethachlor; Compounds that are believed to exert herbicidal effects by inhibiting plant protein biosynthesis or lipid biosynthesis, such as thiocarbamate compounds such as molinate, dimepiperate, pyributicarb, EPTC, butylate, vernolate, pebulate, cycloate, prosulfocarb, esprocarb, thiobencarb, diallate, tri-allate, and orbencarb, and other compounds such as etobenzanid, mefenacet, flufenacet, tridiphane, fentrazamide, oxaziclomefone, benfuresate, pyroxasulfone, dalapon, dalapon-sodium, TCA-sodium, and trichloroacetic acid. (10) Compounds such as dichlobenil, triaziflam, indaziflam, flupoxam and isoxaben are believed to have herbicidal effects by inhibiting cellulose biosynthesis in plants. (11) Other herbicides such as MSMA, DSMA, CMA, endothall, endothall-dipotassium, endothall-sodium, endothall-mono(N,N-dimethylalkylammonium), ethofumesate, sodium chlorate, pelargonic acid, nonanoic acid, fosamine, fosamine-ammonium, ipfencarbazone, acrolein, ammonium sulfamate, borax, chloroacetic acid, sodium chloroacete, cyanamide, methylarsonic acid, dimethylarsinic acid, sodium dimethylarsinate, dinoterb, dinoterb-ammonium, dinoterb-diolamine, dinoterb-acetate, DNOC, ferrous sulfate, flupropanate, flupropanate-sodium, mefluidid, mefluidid-diolamine, metam, metam-ammonium, metam-potassium, metam-sodium, methyl Other herbicides such as isothiocyanate, pentachlorophenol, sodium pentachlorophenoxide, pentachlorophenol laurate, quinoclamin, sulfuric acid, urea sulfate, xanthinosine, herbimycin, unguinol, metatyrosin, sarmentin, thaxtominA, mevalosidine, alpha-limonene, piribambenz-propyl, piribambenz-isopropyl, iptriazopyrid, asulam, asulam- sodium, icafolin, etc. (12) Microorganisms believed to have herbicidal effects as parasites on plants, such as Xanthomonas campestris, Exserohilum monoceras or Drechslera monoceras. One compound or two or more compounds can be appropriately selected from the above other herbicidal compounds. Other herbicide compounds are not limited to the above. As regards the application of the composition of the present invention, application to unwanted plants, application to a place where plants grow (before or after emergence of plants), or application to a place where useful plants grow can be optionally selected. Additionally, tiafenacil (a1) and the herbicidal compound (a2) can be formulated separately to be mixed for use at the time of application or formulated together and then applied. The following can be mentioned as examples of a specific application method. 1. It is formulated by mixing tiafenacil (a1) and herbicidal compound (a2) and the formulation is applied as is. 2. Tiafenacil (a1) and the herbicide compound (a2) are mixed and formulated together, and the formulation is diluted to a predetermined concentration, for example, with water, and, as the case may be, an agricultural spreader (such as a surfactant, a vegetable oil, or a mineral oil) is added to the diluted solution, and the diluted solution is applied. 3. Thiafenacil (a1) and the herbicidal compound (a2) are formulated separately and the formulations are applied as is. 4. Tiafenacil (a1) and the herbicide compound (a2) are formulated separately and the formulations are diluted separately, for example with water, to predetermined concentrations, and an agricultural spreader (for example a surfactant, a vegetable oil or a mineral oil) is added to the diluted solutions as the case may be, and the diluted solutions are applied. . Tiafenacil (a1) and the herbicidal compound (a2) are formulated separately and the formulations are mixed, for example diluted with water to a predetermined concentration, and, as the case may be, an agricultural spreader (such as a surfactant, a vegetable oil or a mineral oil) is added to the diluted solution and the diluted solution is applied. The composition of the present invention can be prepared by mixing thiafenacil (a1) and herbicide compound (a2), as active ingredients, with various additives in accordance with conventional formulation methods for agricultural chemicals, and can be applied in the form of various formulations such as powders, granules, water-dispersible granules, wettable powders, tablets, pills, capsules (including a formulation packaged in a water-soluble film), water-based suspensions, oil-based suspensions, microemulsions, suspoemulsions, water-soluble powders, emulsifiable concentrates, soluble concentrates or pastes. The composition of the present invention can be made into any formulation commonly used in the field, as long as the purpose of the present invention is met. During formulation, tiafenacil (a1) and the herbicide compound (a2) can be formulated together or formulated separately. Additives to be used for the formulation include, for example, a solid carrier such as diatomaceous earth, slaked lime, calcium carbonate, talc, white carbon, kaolin, bentonite, kaolinite, sericite, clay, sodium carbonate, sodium bicarbonate, mirabilite, zeolite, starch or saccharides; a solvent such as water, toluene, xylene, solvent naphtha, dioxane, acetone, isophorone, methyl isobutyl ketone, chlorobenzene, cyclohexane, dimethyl sulfoxide, dimethylformamide, dimethylacetamide, N-methyl-2- pyrrolidone or an alcohol (such as propylene glycol); a fatty acid salt, a benzoate, an alkylsulfosuccinate, a dialkylsulfosuccinate, a polycarboxylate, an alkylsulfuric acid ester salt, an alkyl sulfate, an alkyllaryl sulfate, an alkyl diglycol ether sulfate, an alcohol sulfuric acid ester salt, an alkyl sulfonate, an alkylaryl sulfonate, an aryl sulfonate, a lignin sulfonate, an alkyldiphenyl ether disulfonate, a polystyrene sulfonate, an alkylphosphoric acid ester salt, an alkylaryl phosphate, a styryl phosphate, a polyoxyethylene alkyl ether sulfuric acid ester salt, a polyoxyethylene alkylaryl ether sulfate, a polyoxyethylene alkylaryl ether sulfuric acid ester salt, a polyoxyethylene alkyl ether phosphate, polyoxyethylene alkylaryl phosphoric an anionic surfactant or an anionic dispersant, such as a salt of the acid ester, a salt of the polyoxyethylene aryl ether phosphoric acid ester, a formaldehyde-condensed naphthalene sulfonate or a formaldehyde-condensed alkylnaphthalene sulfonate; a nonionic surfactant or a nonionic spreader, such as a sorbitan fatty acid ester, a glycerin fatty acid ester, a fatty acid polyglyceride, a fatty acid alcohol polyglycol ether, acetylene glycol, acetylene alcohol, an oxyalkylene block polymer, a polyoxyethylene alkyl ether, a polyoxyethylene alkyllaryl ether, a polyoxyethylene styryl ether, a polyoxyethylene glycol alkyl ether, a polyethylene glycol, a polyoxyethylene fatty acid ester, a polyoxyethylene sorbitan fatty acid ester, a polyoxyethylene glycerin fatty acid ester, a polyoxyethylene hydrogenated castor oil, or a polyoxypropylene fatty acid ester; and a vegetable oil or mineral oil such as olive oil, kapok oil, castor oil, palm oil, camellia oil, coconut oil, sesame oil, corn oil, rice bran oil, peanut oil, cottonseed oil, soybean oil, rapeseed oil, linseed oil, tung oil, or liquid paraffins. These additives may be appropriately selected for use alone or in combination as a mixture of two or more, as long as the purpose of the present invention is met. Additionally, various commonly used additives such as a filler, a thickener, an anti-settling agent, an anti-freezing agent, a dispersion stabilizer, a purifier, a mold inhibitor, a blowing agent, a disintegrant, and a binder may be used. The mixing ratio of the additives tiafenacil (a1) and the herbicide compound (a2) to each or their mixture, by weight, is approximately 0. 1:99. 9 Examples of preferred embodiments of the present invention will be given below, but it should be understood that the present invention is by no means limited to these. A method comprising applying to unwanted plants, to a place where unwanted plants grow or to a place where beneficial plants grow an effective amount of thiafenacil (a1) and at least one herbicidal compound (a2) selected from the following compound group A: compound group A: herbicidal compounds S-metolachlor, metribuzin, pyroxasulfone, pethoxamid, tri-allate and dimethenamid-P. is at least one member selected from pethoxamid, tri-allate and dimethenamid-P. is at least one member selected from pyroxasulfone and tri-allate. At least one member is chosen from among the allate. At least one member is elected from among At least one member is elected from among pyroxasulfone. at least one member is elected. applied at a dose of (a2) 0.1 to 5000 g/ha. and (a2) is applied at a dose of 1 to 4000 g/ha. An agricultural combination between It is between 1:200. a combination. at least one member selected from pyroxasulfone, pethoxamide, tri-allate and dimethenamide-P. at least one member selected from metribuzin, pyroxasulfone and tri-allate. is at least one member selected from pyroxasulfone and tri-allate. agricultural composition according to [16] or [17]. agricultural composition. and at least one member selected from pyroxasulfone. agricultural composition according to. and at least one member elected from the tri-allate. or tri-allattir. A method comprising applying, before starting the application, to unwanted plants, to a place where unwanted plants are growing or to a place where beneficial plants are growing, an effective amount of tiafenacil (a1) and at least one herbicidal compound (a2) selected from the following compound group A: compound group A; herbicidal compounds S-metolachlor, metribuzin, pyroxasulfone, pethoxamid, tri-allate and dimethenamid-P. (a2) S-metolachlor. a method comprising applying an effective amount of at least one herbicidal compound (a2) selected from compound group A to unwanted plants, to a place where unwanted plants grow or to a place where beneficial plants grow; compound group A: herbicidal compounds S-metolachlor, metribuzin, pyroxasulfone, pethoxamid, tri-allate and dimethenamid-P. It comprises applying to a place where unwanted plants are growing or to a place where useful plants are growing an effective amount of tiafenacil (a1) and at least one herbicidal compound (a2) selected from the following compound group A; compound group A: herbicidal compounds S-metolachlor, metribuzin, pyroxasulfone, pethoxamid, tri-allate and dimethenamid-P. EXAMPLES Examples of the present invention will be described, but the present invention is by no means limited thereto. First, tests on the herbicidal effect of the composition of the present invention on undesirable plants will be described. (1) Herbicidal effect test (Italian ryegrass (Lolium multiflorum)) Field soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. Italian grass 2. 3 to 3. When it reached the 0 leaf stage, a water-based suspension containing tiafenacil as the active ingredient and an emulsifiable concentrate containing S-metolachlor as the active ingredient (trade name: Dual Gold, manufactured by Syngenta) prepared by a conventional method for preparing a water-based suspension was diluted with water (in an amount corresponding to 200 liters per hectare) and sprayed with a small spray gun (model: W-101-132G, manufactured by ANEST IWATA Corporation). 6 after spraying. On the 10th day, the growth status of Italian rye was observed visually and the growth inhibition rate (%) was obtained according to the following standards and the results are shown in Table 1. Evaluation standards: Growth inhibition rate (%) = 0 (equivalent to untreated area) to 100 (complete killing) In addition, the expected value of growth inhibition rate (%) is shown according to the following Colby formula. Colby's formula: X: growth inhibition rate when treated with compound A (g/ha), Y: growth inhibition rate when treated with compound B (g/ha), E: expected growth inhibition rate (expected value) when treated with compound A (g/ha) and compound B (g/ha). That is, when the growth inhibition rate of the composition of the present invention is higher than E (expected value of growth inhibition rate) calculated by the above formula, the combination can be considered to have a synergistic effect. From Table 1, it was found that the combined use of tiafenacil (a1) and S-metolachlor (a2) had better controlling effects on Italian ryegrass than the use of each component alone. The growth inhibition rates of combined use of tiafenacil (a1) and S-metolachlor (a2) were higher than expected values in all dose combinations and therefore, the combined use was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) Measured value (expected S-metolachlor 25+750 99(84) +375 99(84) +250 98(83) thifenacil 25 83 12.5 75 S-metolachlor 3000 5 1500 5 (2) Herbicidal effect test ( Italian grass (Lolium multiflorum)) Land soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reached the 2.5 to 3.0 leaf stage, a water-based suspension containing tiafenacil as the active ingredient and an emulsifiable concentrate containing S-metolachlor as the active ingredient (trade name: Dual Gold, manufactured by Syngenta) prepared by a conventional method for preparing water-based suspension was diluted with water (in an amount corresponding to 200 liters per hectare) and sprayed with a small spray gun (model: W-101-132G, manufactured by ANEST IWATA Corporation). 16 days after spraying On the 10th day, the growth status of Italian rye was visually observed and the growth inhibition rate (%) was obtained in accordance with the evaluation standards described in the herbicidal effect test above (1) and the results are shown in Table 2. In addition, the expected value of growth inhibition rate (%) was calculated according to the Colby formula explained in the herbicidal effect test above (1) and the results are also shown in Table 2. From Table 2, it was found that the combined use of tiafenacil (a1) and S-metolachlor (a2) had better controlling effects on Italian ryegrass than the use of each component alone. The growth inhibition rates of the combined use of tiafenacil (a1) and S-metolachlor (a2) were higher than expected values at all dose combinations and therefore the combined use was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) tiafenacil 12.5 30 S-metolachlor 3000 73 1500 55 62.5 0 (3) Herbicidal effect test (Italian ryegrass (Lolium multiflorum)) Field soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reached the 2.8 to 3.2 leaf stage, a water-based suspension containing tiafenacil as the active ingredient, prepared by a conventional method for preparing a water-based suspension, and an emulsifiable concentrate containing S-metolachlor as the active ingredient (trade name: Dual Gold, manufactured by Syngenta), was diluted with water (in an amount corresponding to 200 litres per hectare) and sprayed with a small spray gun (model: W-101-132Câ, manufactured by ANEST IWATA Corporation). 7 days after spraying On the 10th day, the growth status of Italian rye was visually observed and the growth inhibition rate (%) was obtained in accordance with the evaluation standards described in the herbicidal effect test above (1) and the results are shown in Table 3. In addition, the expected value of growth inhibition rate (%) was calculated according to the Colby formula explained in the herbicidal effect test above (1) and the results are also shown in Table 3. From Table 3, it was found that the use of tiafenacil (a1) and S-metolachlor (a2) in combination at certain doses had better controlling effects on Italian ryegrass than the use of each component alone. The growth inhibition rates of combined use of tiafenacil (a1) and S-metolachlor (a2) at a given dose combination were higher than expected and therefore, the combined use was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) thifenacil+ S-metolachlor thifenacil 12.5 53 S-metolachlor 15.6 0 (4) Herbicidal effect test (Italian grass (Lolium multiflorum)) Field soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reaches the 2.5 to 3.0 leaf stage, a water-based suspension containing tiafenacil as the active ingredient prepared by a conventional method for preparing a water-based suspension and a wettable powder containing metribuzin as the active ingredient (trade name: SENCOR wettable powder, manufactured by Bayer Crop Science), 0.5% by volume agricultural spreader (trade name: Destiny HC, Winfield Solutions, LLC). It was diluted with water containing 200 litres of water per hectare (manufactured by ANEST IWATA Corporation) and sprayed with a small spray gun (model: W-101-132Câ, manufactured by ANEST IWATA Corporation). 7 days after spraying On the 10th day, the growth status of Italian rye was visually observed and the growth inhibition rate (%) was obtained in accordance with the evaluation standards described in the herbicidal effect test above (1) and the results are shown in Table 4. In addition, the expected value of growth inhibition rate (%) was calculated according to the Colby formula explained in the herbicidal effect test above (1) and the results are also shown in Table 4. From Table 4, it was found that the combined use of tiafenacil (a1) and metribuzin (a2) had better controlling effects on Italian ryegrass than the use of each component alone. The growth inhibition rates of the combination of tiafenacil (a1) and metribuzin (a2) were higher than expected values in all dose combinations and therefore the combined use was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) tiafenacil 6.25 30 metribuzin 1100 88 550 57 275 45 9.38 0 (5) Herbicidal effect test (Italian ryegrass (Lolium multiflorum)) Plateau soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reached the 3.0 to 3.3 leaf stage, a water-based suspension containing tiafenacil as the active ingredient prepared by a conventional method for preparing a water-based suspension and a wettable powder containing metribuzin as the active ingredient (trade name: SENCOR wettable powder, manufactured by Bayer Crop Science), water-dispersible granules containing pyroxasulfone as the active ingredient (trade name: Sakura, manufactured by Bayer Crop Science) or a wettable powder containing tri-allate as the active ingredient prepared by a conventional method for preparing a wettable powder (manufactured by Bayer Crop Science) were diluted in water (in an amount corresponding to 200 liters per hectare) and sprayed with a small spray gun (model: W-101-132Câ, manufactured by ANEST IWATA Corporation). 6 after spraying. On the 10th day, the growth status of Italian rye was visually observed and the growth inhibition rate (%) was obtained in accordance with the evaluation standards described in the herbicidal effect test above (1) and the results are shown in Table 5. In addition, the expected value of growth inhibition rate (%) was calculated according to the Colby formula explained in the herbicidal effect test above (1) and the results are also shown in Table 5. From Table 5, it was found that the combination of tiafenacil (a1) and metribuzin, pyroxasulfone or tri-allate (a2) had better controlling effects on Italian ryegrass compared to the use of each component alone. The growth inhibition rates obtained by using the combination of tiafenacil (a1) and metribuzin, pyroxasulfone or tri-allate (a2) in all combinations were higher than expected values and therefore the use in combination was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) 12.5+15 77(61) Test Compound Dose (g/ha) Growth inhibition rate (%) 6.25+15 63(35) 6.25+7.5 58(33) 6.25+75 52(33) tiafenacil 12.5 60 6.25 33 3.13 17 metribuzin 550 30 275 30 137.5 20 pyroxasulfone 250 23 125 17 62.5 8 Test Compound Dose (g/ha) Growth inhibition rate (%) tri-allate 1250 5 (6) Herbicidal effect test (Italian ryegrass (Lolium multiflorum)) Field soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reaches the 2.5 to 3.0 leaf stage, a water-based suspension containing tiafenacil as the active ingredient and water-dispersible granules containing pyroxasulfone as the active ingredient (trade name: Sakura, manufactured by Bayer Crop Science) prepared by a conventional method for preparing water-based suspension are applied with an agricultural spreader (trade name: Destiny HC, manufactured by Winfield Solutions, LLC) at 0.5% vol. It was diluted with water containing 200 litres of water per hectare (manufactured by ANEST IWATA Corporation) and sprayed with a small spray gun (model: W-101-132Câ, manufactured by ANEST IWATA Corporation). 14 days after spraying On the day, the growth status of Italian ryegrass was visually observed and the growth inhibition rate (%) was obtained in accordance with the evaluation standards described in the herbicidal effect test above (1) and the results are shown in Table 6. In addition, the expected value of growth inhibition rate (%) was calculated according to the Colby formula explained in the herbicidal effect test above (1) and the results are also shown in Table 6. From Table 6, it was found that the combined use of tiafenacil (a1) and pyroxasulfone (a2) had better controlling effects on Italian ryegrass than the use of each component alone. Growth inhibition rates with the combined use of tiafenacil (a1) and pyroxasulfone (a2) were higher than expected values in all dose combinations and therefore the combined use was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) 12.5+30 97(65) 12.5+15 95(63) tiafenacil 12.5 63 pyroxasulfone 1000 72 500 67 250 42 125 35 (7) Herbicidal effect test (Italian ryegrass (Lolium multiflorum)) Plateau soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reaches the 2.8 to 3.0 leaf stage, a water-based suspension containing tiafenacil as the active ingredient prepared by a conventional method for preparing a water-based suspension and an emulsifiable concentrate containing pethoxamide as the active ingredient (trade name: Successor 600, manufactured by Stahler Suisse SA) or an emulsifiable concentrate containing dimethenamide-P as the active ingredient (trade name: Fieldstar P emulsifiable concentrate, manufactured by BASF), 0.5% by volume of agricultural spreader (trade name: Destiny HC, Winfield Solutions, LLC). It was diluted with water containing 200 litres of water per hectare (manufactured by ANEST IWATA Corporation) and sprayed with a small spray gun (model: W-101-132Câ, manufactured by ANEST IWATA Corporation). 7 days after spraying On the 10th day, the growth status of Italian ryegrass was visually observed and the growth inhibition rate (%) was obtained in accordance with the evaluation standards described in the herbicidal effect test above (1) and the results are shown in Table 7. Moreover, the expected value of growth inhibition rate (%) was calculated according to the Colby formula explained in the herbicidal effect test above (1) and the results are also shown in Table 7. From Table 7, it was found that the combined use of tiafenacil (a1) and pethoxamid or dimethenamid-P (a2) had better controlling effects on Italian ryegrass than the use of each component alone. In all combinations, growth inhibition rates with the combined use of tiafenacil (a1) and pethoxamid or dimethenamid-P (a2) were higher than expected values and therefore the combined use was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) Test Compound Dose (g/ha) Growth inhibition rate (%) 6.25+60 55(15) tiafenacil 25 33 12.5 37 6.25 15 pethoxamid 1500 12 187.5 0 93.75 0 dimethenamid-P 1500 15 750 12 Test Compound Dose (g/ha) Growth inhibition rate (%) (8) Herbicidal effect test (Italian ryegrass (Lolium multiflorum)) Plateau soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reaches the 3.0 to 3.1 leaf stage, a water-based suspension containing tiafenacil as the active ingredient prepared by a conventional method for preparing water-based suspension and an emulsifiable concentrate containing S-metolachlor as the active ingredient (trade name: Dual Gold, manufactured by Syngenta), a wettable powder containing metribuzin as the active ingredient (trade name: SENCOR wettable powder, manufactured by Bayer Crop Science) or water-dispersible granules containing pyroxasulfone as the active ingredient (trade name: Sakura, manufactured by Bayer Crop Science) was diluted with water (in an amount corresponding to 200 litres per hectare) and sprayed with a small spray gun (model: W-101-132Câ, manufactured by ANEST IWATA Corporation). 4th day after spraying On the 10th day, the growth status of Italian ryegrass was visually observed and the growth inhibition rate (%) was obtained in accordance with the evaluation standards described in the herbicidal effect test above (1) and the results are shown in Table 8. In addition, the expected value of growth inhibition rate (%) was calculated according to the Colby formula explained in the herbicidal effect test above (1) and the results are shown in Table 8. From Table 8, it was found that the combined use of tiafenacil (a1) and S-metolachlor, metribuzin or pyroxasulfone (a2) had better controlling effects on Italian ryegrass than the use of each component alone. The growth inhibition rates of the combined use of tiafenacil (a1) and S-metolachlor, metribuzin or pyroxasulfone (a2) were higher than the expected values in all combinations and therefore the combined use was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) Measured value (expected thiefenacil 6.25 20 S-metolachlor 625 13 500 10 metribuzin 938 33 750 20 438 10 pyroxasulfone 375 20 188 10 (9) Herbicide potency test (Italian grass (Lolium multiflorum)) Plateau soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reaches the 3.2 to 4.0 leaf stage, a water-based suspension containing thiafenacyl as the active ingredient and a wettable powder containing tri-allate as the active ingredient, prepared by a conventional method for preparing a water-based suspension, an emulsifiable concentrate containing pethoxamide as the active ingredient (trade name: Successor 600, manufactured by Stahler Suisse SA) or an emulsifiable concentrate containing dimethenamide-P as the active ingredient (trade name: Fieldstar P emulsifiable concentrate, manufactured by BASF), at 0.5% vol. (produced by ) was diluted with water containing (in an amount corresponding to 200 litres per hectare) and sprayed with a small spray gun (model: W-. 6 after spraying. On the 1st day, the growth status of Italian ryegrass was visually observed and the growth inhibition rate (%) was obtained in accordance with the evaluation standards described in the herbicidal effect test above (1) and the results are shown in Table 9. Moreover, the expected value of growth inhibition rate (%) was calculated according to the Colby formula explained in the herbicidal effect test above (1) and the results are also shown in Table 9. From Table 9, it was found that the combined use of tiafenacil (a1) and tri-allate, pethoxamid or dimethenamid-P (a2) had better controlling effects on Italian ryegrass compared to the use of each component alone. The growth inhibition rates obtained by using tiafenacil (a1) and tri-allate, pethoxamid or dimethenamid-P (a2) in combination were higher than expected values in all combinations and therefore the combined use was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) Measured value (expected tri-allate tiafenacil 6.25 30 tri-allate 937.5 3 pethoxamid 625 8 437.5 3 312.5 5 dimethenamid-P 625 40 500 33 (10) Herbicidal effect test (goose grass (Eleusine indica)) Yayla soil 1/1. 000. A pot of 000 hectares was placed and goose grass (Eleusine indica) seeds were planted. When goosegrass reaches the 6.5 to 7.8 leaf stage, a water-based suspension containing tiafenacil as the active ingredient prepared by a conventional method for preparing water-based suspension and an emulsifiable concentrate containing S-metolachlor as the active ingredient (trade name: Dual Gold, manufactured by Syngenta), a wettable powder containing metribuzin as the active ingredient (trade name: SENCOR wettable powder, manufactured by Bayer Crop Science), or water-dispersible granules containing pyroxasulfone as the active ingredient (trade name: Sakura, manufactured by Bayer Crop Science) are diluted with water (in an amount corresponding to 200 liters per hectare) and applied with a small spray gun (model: W-101-132Câ, manufactured by ANEST IWATA Corporation). has been sprayed. 13th after spraying On the day, the growth status of goose grass was observed visually and the growth inhibition rate (%) was obtained in accordance with the evaluation standards explained in the herbicidal effect test above (1) and the results are shown in Table 10. Moreover, the expected value of growth inhibition rate (%) was calculated according to the Colby formula explained in the herbicidal effect test above (1), and the results are also shown in Table 10. From Table 10, it was found that the combined use of tiafenacil (a1) and S-metolachlor, metribuzin or pyroxasulfone (a2) had better controlling effects on goosegrass than the use of each component alone. The growth inhibition rates of the combined use of tiafenacil (a1) and S-metolachlor, metribuzin or pyroxasulfone (a2) were higher than the expected values in all combinations and therefore the combined use was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) Measured value (expected Test Compound Dose (g/ha) Growth inhibition rate (%) Measured value (expected 6.25+7.5 96(35) 6.25+7.5 96(30) tiafenacil 6.25 30 S-metolachlor 750 7 metribuzin 1100 72 550 68 9.38 7 pyroxasulfone 500 2 (11) Herbicidal effect test (goose grass (Eleusine indica)) Yayla soil 1/1. 000. A pot of 000 hectares was placed and goose grass (Eleusine indica) seeds were planted. When goose grass reaches the 7.0 to 8.3 leaf stage, a water-based suspension containing thiafenacyl as the active ingredient and a wettable powder containing tri-allate as the active ingredient, prepared by a conventional method for preparing a water-based suspension, an emulsifiable concentrate containing pethoxamide as the active ingredient (trade name: Successor 600, manufactured by Stahler Suisse SA) or an emulsifiable concentrate containing dimethenamide-P as the active ingredient (trade name: Fieldstar P emulsifiable concentrate, manufactured by BASF), at 0.5% vol. ) was diluted with water (in an amount corresponding to 200 litres per hectare) and sprayed with a small spray gun (model: W-. 3 after spraying. On the 10th day, the growth status of goose grass was observed visually and the growth inhibition rate (%) was obtained in accordance with the evaluation standards explained in the herbicidal effect test above (1) and the results are shown in Table 11. Moreover, the expected value of growth inhibition rate (%) was calculated according to the Colby formula explained in the herbicidal effect test above (1), and the results are also shown in Table 11. From Table 11, it was found that the combined use of tiafenacil (a1) and tri-allate, pethoxamid or dimethenamid-P (a2) had better controlling effects on goosegrass than the use of each component alone. The growth inhibition rates obtained by using tiafenacil (a1) and tri-allate, pethoxamid or dimethenamid-P (a2) in combination were higher than expected values in all combinations and therefore the combined use was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) Measured value (expected 6.25+75 93(77) 6.25+60 95(77) tiafenacil 6.25 77 tri-allate 1250 5 pethoxamid 750 0 93.8 0 dimethenamid-P 750 0 (12) Herbiside effect test (water hemp (Amaranthus tuberculatus)) Yayla soil 1/1. 000. A pot of 000 hectares was placed and water hemp (Amaranthus tuberculatus) seeds were planted. When waterhemp reached the 6.0 to 8.5 leaf stage, a water-based suspension containing tiafenacil as the active ingredient prepared by a conventional method for preparing water-based suspension and an emulsifiable concentrate containing S-metolachlor as the active ingredient (trade name: Dual Gold, manufactured by Syngenta), a wettable powder containing metribuzin as the active ingredient (trade name: SENCOR wettable powder, manufactured by Bayer Crop Science) or water-dispersible granules containing pyroxasulfone as the active ingredient (trade name: Sakura, manufactured by Bayer Crop Science) were diluted with water (in an amount corresponding to 200 liters per hectare) and sprayed with a small spray gun (model: W-101-132Câ, manufactured by ANEST IWATA Corporation). 13th after spraying On the day, the growth status of waterhemp was observed visually and the growth inhibition rate (%) was obtained in accordance with the evaluation standards described in the herbicidal effect test above (1) and the results are shown in Table 12. Moreover, the expected value of growth inhibition rate (%) was calculated according to the Colby formula explained in the herbicidal effect test above (1), and the results are also shown in Table 12. From Table 12, it was found that the combined use of tiafenacil (a1) and S-metolachlor, metribuzin or pyroxasulfone (a2) had better controlling effects on waterhemp compared to the use of each component alone. The growth inhibition rates of the combined use of tiafenacil (a1) and S-metolachlor, metribuzin or pyroxasulfone (a2) were higher than the expected values in all combinations and therefore the combined use was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) Measured value (expected 6.25+7.5 93(33) 6.25+7.5 97(40) tiafenacil 6.25 33 S-metolachlor 750 0 metribuzin 1100 50 550 37 9.38 5 pyroxasulfone 500 13 250 17 7.5 10 (13) Herbicide effect test (water hemp (Amaranthus tuberculatus)) Yayla soil 1/1. 000. A pot of 000 hectares was placed and water hemp (Amaranthus tuberculatus) seeds were planted. When waterhemp reaches the 5.0 to 8.0 leaf stage, a water-based suspension containing thiafenacyl as the active ingredient and a wettable powder containing tri-allate as the active ingredient, prepared by a conventional method for preparing a water-based suspension, an emulsifiable concentrate containing pethoxamide as the active ingredient (trade name: Successor 600, manufactured by Stahler Suisse SA), or an emulsifiable concentrate containing dimethenamide-P as the active ingredient (trade name: Fieldstar P emulsifiable concentrate, manufactured by BASF), at 0.5% vol. ) was diluted with water (in an amount corresponding to 200 litres per hectare) and sprayed with a small spray gun (model: W-. 4th day after spraying On the 10th day, the growth status of waterhemp was visually observed and the growth inhibition rate (%) was obtained in accordance with the evaluation standards described in the herbicidal effect test above (1) and the results are shown in Table 13. In addition, the expected value (%) of growth inhibition rate was calculated according to the Colby formula explained in the herbicidal effect test above (1) and the results are shown in Table 13. From Table 13, it was found that the combined use of tiafenacil (a1) and tri-allate, pethoxamid or dimethenamid-P (a2) had better controlling effects on waterhemp compared to the use of each component alone. The growth inhibition rates obtained by using tiafenacil (a1) and tri-allate, pethoxamid or dimethenamid-P (a2) in combination were higher than expected values in all combinations and therefore the combined use was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) 6.25+75 90(73) 6.25+60 92(73) thifenacil 6.25 73 tri-allate 1250 0 pethoxamide 750 0 93.8 0 dimetenamide-P 750 0 (14) Herbicide potency test (horseweed (Conyza canadensis)) Plateau soil 1/1. 000. A pot of 000 hectares was placed and horse grass (Conyza canadensis) seeds were planted. When horsegrass reaches a diameter of 12 to 17 cm, a water-based suspension containing tiafenacil as the active ingredient prepared by a conventional method for preparing a water-based suspension and an emulsifiable concentrate containing S-metolachlor as the active ingredient (trade name: Dual Gold, manufactured by Syngenta), wettable powder containing metribuzin as the active ingredient (trade name: SENCOR wettable powder, manufactured by Bayer Crop Science) or water-dispersible granules containing pyroxasulfone as the active ingredient (trade name: Sakura, manufactured by Bayer Crop Science), 0%. A 5 volume agricultural spreader (trade name: Destiny HC, Winfield Solutions, LLC. It was diluted with water containing 200 litres of water per hectare (manufactured by ANEST IWATA Corporation) and sprayed with a small spray gun (model: W-101-132Câ, manufactured by ANEST IWATA Corporation). 6 after spraying. On the 10th day, the growth status of horseweed was observed visually and the growth inhibition rate (%) was obtained in accordance with the evaluation standards described in the herbicidal effect test above (1) and the results are shown in Table 14. In addition, the expected value of growth inhibition rate (%) was calculated according to the Colby formula explained in the herbicidal effect test above (1) and the results are shown in Table 14. From Table 14, it was found that the combined use of tiafenacil (a1) and S-metolachlor, metribuzin or pyroxasulfone (a2) had better controlling effects on horseweed than the use of each component alone. The growth inhibition rates of the combined use of tiafenacil (a1) and S-metolachlor, metribuzin or pyroxasulfone (a2) were higher than the expected values in all combinations and therefore the combined use was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) Measured value (expected 6.25+7.5 48(23) 6.25+7.5 63(23) thifenacil 6.25 23 S-metolachlor 750 0 metribuzin 1100 5 9.38 0 pyroxasulfone 500 0 (15) Herbicide effect test (horse grass (Conyza canadensis)) Highland soil 1/1. 000. A pot of 000 hectares was placed and horse grass (Conyza canadensis) seeds were planted. When horsegrass reaches a diameter of 13 to 19 cm, a water-based suspension containing thiafenacyl as the active ingredient and a wettable powder containing tri-allate as the active ingredient, prepared by a conventional method for preparing a water-based suspension, an emulsifiable concentrate containing pethoxamide as the active ingredient (trade name: Successor 600, manufactured by Stahler Suisse SA) or an emulsifiable concentrate containing dimethenamide-P as the active ingredient (trade name: Fieldstar P emulsifiable concentrate, manufactured by BASF), 0.5% vol. (manufactured by ANEST IWATA Corporation) was diluted with water containing 200 litres per hectare of land and sprayed with a small spray gun (model: W-101-132Câ, manufactured by ANEST IWATA Corporation). 3 after spraying. On the 10th day, the growth status of horseweed was visually observed and the growth inhibition rate (%) was obtained in accordance with the evaluation standards described in the herbicidal effect test above (1) and the results are shown in Table 15. Moreover, the expected value of growth inhibition rate (%) was calculated according to the Colby formula explained in the herbicidal effect test above (1), and the results are also shown in Table 15. From Table 15, it was found that the combined use of tiafenacil (a1) and tri-allate, pethoxamid or dimethenamid-P (a2) had better controlling effects on horseweed compared to the use of each component alone. The growth inhibition rates of the combined use of thiaphenacil (a1) and tri-allate, pethoxamide or dimethenamid-P (a2) were higher than the expected values in all combinations and therefore the combined use was found to have a synergistic effect. Test Compound Dose (g/ha) Growth inhibition rate (%) Measured value (expected 6.25+75 43(17) 6.25+60 50(17) tiafenacil 6.25 17 tri-allate 1250 3 pethoxamid 750 0 93.8 0 dimethenamid-P 750 0 Below, a comparative test between the composition of the present invention and a composition containing another herbicidal compound instead of tiafenacil will be described. (16) Herbicidal effect test (comparative test) Highland soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reaches the 2.5 to 3.0 leaf stage, a water-based suspension containing tiafenacil as the active ingredient prepared by a conventional method for preparing a water-based suspension, a water-based suspension containing saflufenacil as the active ingredient (trade name: Sharpen, manufactured by BASF), a wettable powder containing fomesafen as the active ingredient, an emulsifiable concentrate containing fluthiacet-methyl as the active ingredient prepared by a conventional method for preparing a wettable powder (trade name: Attackshot emulsifiable concentrate, manufactured by MARUWA Biochemical Co. , Ltd. ), a dry fluid containing carfentrazone-ethyl as the active ingredient (trade name: Task DF, manufactured by lSHlHARA SANGYO KAlSHA, LTD. ) or an aqueous suspension containing pyraflufen-ethyl as the active ingredient (trade name: ECOPART fluid, NlHON NOHYAKU CO, LTD. manufactured by Syngenta) and an emulsifiable concentrate containing 8-metolachlor as the active ingredient (trade name: Dual Gold, manufactured by Syngenta) or a wettable powder containing metribuzin as the active ingredient (trade name: SENCOR wettable powder, manufactured by Bayer Crop Science) at 0.5% vol. as an agricultural spreader (trade name: Destiny HC, manufactured by Winfield Solutions, LLC. (manufactured by ANEST IWATA Corporation) was diluted with water containing 200 liters per hectare of land and sprayed with a small spray gun (model: W-101-132Câ, manufactured by ANEST IWATA Corporation). 4th day after spraying On the 1st day, the growth status of Italian ryegrass was visually observed and the growth inhibition rate (%) was obtained in accordance with the evaluation standards described in the herbicidal effect test above (1) and the results are shown in Table 16. In addition, the expected value of growth inhibition rate (%) was calculated according to the Colby formula explained in the herbicidal effect test above (1) and the results are shown in Table 16. From Table 16, it was found that the combination of tiafenacil (a1) and S-metolachlor or metribuzin (a2) had better controlling effects on Italian ryegrass compared to the use of each component alone. The growth inhibition rates of the combination of tiafenacil (a1) and S-metolachlor or metribuzin (a2) were higher than expected values and therefore the combined use was found to have a synergistic effect. And the combination of tiafenacil (a1) and S-metolachlor or metribuzin (a2), which is the composition of the present invention, exhibited a higher growth inhibition rate than combinations of tiafenacil and a test compound other than S-metolachlor or metribuzin. However, no improvement in the control effect on Italian ryegrass was observed when test compounds, except tiafenacil, were used in combination with S-metolachlor or metribuzin compared to either compound used alone. Furthermore, the growth inhibition rates of such combinations were not higher than the expected values, thus indicating that these combinations did not have a synergistic effect. Test Compound Dose Growth inhibition rate Measured value (expected) Present invention tiafenacil+ S-metolachlor tiafenacil+ metribuzin Comparative saflufenacil+ saflufenacil+ metribuzin Test Compound Dose Growth inhibition rate Measured value (expected) fomesafen + 12.5+750 8(11) S-metolachlor fomesafen + metribuzin fluthiacet-methyl+ S-metolachlor fluthiacet-methyl+ metribuzin carfentrazone-ethyl+ S-metolachlor carfentrazone-ethyl+ metribuzin pyraflufen-ethyl+ S-metolachlor pyraflufen-ethyl+ metribuzin tiafenacil 12.5 38 saflufenacil 12.5 33 fomesafen 12.5 8 fluthiacet-methyl 12.5 12 Test Compound Dose Growth inhibition rate Measured value (expected carfentrazone-ethyl 12.5 12 pyraflufen-ethyl 12.5 25 S-metolachlor 750 3 metribuzin 18.75 7 Below, a test on the growth-promoting effect of the compound of the present invention on useful plants (hereinafter referred to as the plant growth-promoting effect test) will be described. First, the test for plant growth promoting effect under conditions where undesirable plants grow will be explained. (17) Plant growth promoting effect test (corn) Highland soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reaches the 2.5 to 3.0 leaf stage, a water-based suspension containing tiafenacil as the active ingredient prepared by a conventional method for preparing a water-based suspension and an emulsifiable concentrate containing S-metolachlor as the active ingredient (trade name: Dual Gold, manufactured by Syngenta) or a wettable powder containing metribuzin as the active ingredient (trade name: SENCOR wettable powder, manufactured by Bayer Crop Science) at 0.5% vol. is applied with an agricultural spreader (trade name: Destiny HC, Winfield Solutions, LLC). ) was diluted with water (corresponding to 200 litres per hectare) and sprayed with a small spray gun (model: W-. Feed corn seeds (variety: SNOW DENT OTOHA, SNOW BRAND SEED Co. , Ltd. ) was planted in pots after spraying. 20th after October. On the first day, the above-ground portion of the feed corn was harvested and its weight was measured to obtain the raw weight. The results are shown in Table 17. From Table 17, it was found that the use of combination of tiafenacil (a1) and S-metolachlor or metribuzin (a2) increased the crude weight of feed maize compared to untreated area and use of each component alone. Test Compound Dose Raw weight of feed corn (g) thifenacil+ 12.5+750 17.1 S-metolachlor metribuzin thifenacil 12.5 8.5 S-metolachlor 750 5.1 metribuzin 18.75 6.2 (Untreated area) - 6.6 (18) Plant growth promoting effect test (corn) Plateau soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reached the 2.7 to 3.1 leaf stage, a water-based suspension containing tiafenacil as the active ingredient prepared by a conventional method for preparing water-based suspension and an emulsifiable concentrate containing S-metolachlor as the active ingredient (trade name: Dual Gold, manufactured by Syngenta), a wettable powder containing metribuzin as the active ingredient (trade name: SENCOR wettable powder, manufactured by Bayer Crop Science) or water-dispersible granules containing pyroxasulfone as the active ingredient (trade name: Sakura, manufactured by Bayer Crop Science) was diluted with water (in an amount corresponding to 200 liters per hectare) and sprayed with a small spray gun (model: W-101-132G, manufactured by ANEST IWATA Corporation). Feed corn seeds (variety: SNOW DENT OTOHA, SNOW BRAND SEED Co. , Ltd. ) was planted in pots after spraying. 21st after October. On the first day, the above-ground portion of the feed corn was harvested and its weight was measured to obtain the raw weight. The results are shown in Table 18. From Table 18, it was found that the combined use of tiafenacil (a1) and S-metolachlor, metribuzin or pyroxasulfone (a2) increased the crude weight of feed maize compared to the untreated area and the use of each component alone. Test Compound Dose Crude weight of feed corn (g) thifenacil+ 6.25+750 6.9 S-metolachlor 6.25+7.5 8.7 thifenacil+ 6.25+550 6.7 metribuzin 6.25+225 6.6 thifenacil+ 6.25+250 8.2 pyroxasulfone 6.25+125 6.5 6.25+7.5 9.5 thiefenacil 6.25 3.2 Test Compound Dose Raw weight of feed corn (g) S-metolachlor 750 3.1 7.5 3.5 metribuzin 550 5.6 225 4.7 pyroxasulfone 250 3.8 125 3.3 7.5 5.8 (Untreated area) - 5.1 (19) Plant growth promoting effect test (corn) Highland soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reaches the 3.2 to 3.7 leaf stage, a water-based suspension containing thiafenacyl as the active ingredient and tri-allate as the active ingredient, prepared by a conventional method for preparing a water-based suspension, a wettable powder prepared by a conventional method for preparing a wettable powder or an emulsifiable concentrate containing pethoxamide as the active ingredient (trade name: Successor 600, manufactured by Stahler Suisse SA), 0.5% by volume, an agricultural spreader (trade name: Destiny HC, manufactured by Winfield Solutions, LLC). (manufactured by ANEST IWATA Corporation) was diluted with water containing (in an amount corresponding to 200 litres per hectare) and sprayed with a small spray gun (model: W-101-132G, manufactured by ANEST IWATA Corporation). Feed corn seeds (variety: SNOW DENT OTOHA, SNOW BRAND SEED Co. , Ltd. ) was planted in pots after spraying. 21st after October. On the first day, the above-ground portion of the feed corn was harvested and its weight was measured to obtain the raw weight. The results are shown in Table 19. From Table 19, it was found that the combined use of tiafenacil (a1) and tri-allate or pethoxamid (a2) increased the crude weight of feed maize compared to the untreated area and the use of each component alone. Test Compound Dose Crude weight of feed corn (9) thifenacil+ 6.25+1250 5.8 tri-allate 6.25+625 5.3 6.25+75 5.7 thifenacil+ 6.25+750 4.4 pethoxamide 6.25+375 5.2 6.25+93.8 6.0 thiafenacil 6.25 3.9 tri-allate 1250 2.5 625 2.2 75 2.6 pethoxamide 750 3.6 375 2.2 93.8 3.4 (Untreated area) - 2.3 (20) Plant growth promoting effect test (maize) Field soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reaches the 2.7 to 3.0 leaf stage, a water-based suspension containing tiafenacil as the active ingredient prepared by a conventional method for preparing a water-based suspension and an emulsifiable concentrate containing dimethenamide-P as the active ingredient (trade name: Fieldstar P emulsifiable concentrate, manufactured by BASF), an agricultural spreader at 0.5% vol. (trade name: Destiny HC, Winfield Solutions, LLC. (produced by ) was diluted with water containing (in an amount corresponding to 200 litres per hectare) and sprayed with a small spray gun (model: W-. Feed corn seeds (variety: SNOW DENT OTOHA, SNOW BRAND SEED Co. , Ltd. ) was planted in pots after spraying. 33rd after October. On the first day, the above-ground portion of the feed corn was harvested and its weight was measured to obtain the raw weight. The results are shown in Table 20. From Table 20, it was found that the combined use of tiafenacil (a1) and dimethenamid-P (a2) increased the crude weight of feed maize compared to the untreated area and the use of each component alone. Test Compound Dose Crude weight of feed corn (g) tiafenacil+ 6.25+750 19.0 dimethenamid-P 6.25+375 21.9 6.25+60 15.5 tiafenacil 6.25 12.1 dimethenamid-P 750 8.0 375 12.5 60 9.8 (Untreated area) - 2.7 (21) Plant growth promoting effect test (wheat) Highland soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reaches the 3.3 to 3.8 leaf stage, a water-based suspension containing thiafenacyl as the active ingredient and a wettable powder containing metribuzin as the active ingredient (trade name: SENCOR wettable powder, manufactured by Bayer Crop Science) or water-dispersible granules containing pyroxasulfone as the active ingredient (trade name: Sakura, manufactured by Bayer Crop Science) prepared by a conventional method for preparing water-based suspension are applied with an agricultural spreader (trade name: Destiny HC, Winfield Solutions, LLC) at 0.5% by volume. (manufactured by ANEST IWATA Corporation) was diluted with water containing (in an amount corresponding to 200 litres per hectare) and sprayed with a small spray gun (model: W-101-13ZG, manufactured by ANEST IWATA Corporation). Wheat seeds (variety: Norin 61, Asahi Noen Seed Co. , Ltd. ) was planted in pots after spraying. 22nd after October. On the day, the above-ground part of the wheat was harvested and its weight was measured to obtain the raw weight. The results are shown in Table 21. Table 21 shows that the combined use of tiafenacil (a1) and metribuzin or pyroxasulfone (a2) increased the crude weight of wheat compared to the untreated area and the use of each component alone. Test Compound Dose Crude weight of wheat (g) thiafenacil+ 3+150 4.5 metribuzin thiafenacil+ 3+37.5 4.0 pyroxasulfone thiafenacil 3 2.3 Test Compound Dose Crude weight of wheat (g) metribuzin 150 2.5 pyroxasulfone 37.5 1.2 (Untreated area) - 1.2 (22) Plant growth promoting effect test (wheat) Field soil 1/1. 000. A pot of 000 hectares was placed and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reached the 2.5 to 2.8 leaf stage, a water-based suspension containing tiafenacil as the active ingredient prepared by a conventional method for preparing a water-based suspension and a wettable powder containing tri-allate as the active ingredient prepared by a conventional method for preparing a wettable powder were diluted with water (in an amount corresponding to 200 liters per hectare) and sprayed with a small spray gun (model: W-101-132G, manufactured by ANEST IWATA Corporation). Wheat seeds (variety: Norin 61, Asahi Noen Seed Co. , Ltd. ) was planted in pots after spraying. 21st after October. On the day, the above-ground part of the wheat was harvested and its weight was measured to obtain the raw weight. The results are shown in Table 22. From Table 22, it is seen that the combined use of tiafenacil (a1) and tri-allate (a2) increased the crude weight of wheat compared to the untreated area and the use of each component alone. Test Compound Dose Crude weight of wheat (g) thifenacil+ 3+200 2.7 tri-allate thifenacil 3 2.2 tri-allate 200 2.3 (Untreated area) - 2.3 (23) Plant growth promoting effect test (soybean) 1/200. 000 hectares of highland soil was placed in a pot and Italian ryegrass (Lolium multiflorum) seeds were planted. When Italian ryegrass reaches the 2.5 to 3.0 leaf stage, it can be treated with a water-based suspension containing tiafenacil as the active ingredient prepared by a conventional method for preparing a water-based suspension and an emulsifiable concentrate containing S-metolachlor as the active ingredient (trade name: Dual Gold, manufactured by Syngenta), a wettable powder containing metribuzin as the active ingredient (trade name: SENCOR wettable powder, manufactured by Bayer Crop Science), water-dispersible granules containing pyroxasulfone as the active ingredient (trade name: Sakura, manufactured by Bayer Crop Science), a wettable powder containing tri-allate as the active ingredient prepared by a conventional method for preparing a wettable powder, an emulsifiable concentrate containing pethoxamide as the active ingredient (trade name: Successor 600, manufactured by Stahler Suisse SA) or a water-based suspension containing thiafenac as the active ingredient (trade name: S-metolachlor) ... an emulsifiable concentrate containing dimethenamide-P (trade name: Fieldstar P emulsifiable concentrate, manufactured by BASF), an agricultural spreader at 0.5% vol (trade name: Destiny HC, manufactured by Winfield Solutions, LLC. (manufactured by ANEST IWATA Corporation) was diluted with water containing 200 liters per hectare of land and sprayed with a small spray gun (model: W-101-132G, manufactured by ANEST IWATA Corporation). Soybean seeds (variety: Enrei, Asahi Noen Seed Co. , Ltd. ) was planted in pots after spraying and soybeans were grown. 97 after October. On the 10th day, seeds were collected from the cultivated soybeans and their weights were measured to obtain the total weight. The results are shown in Table 23. From Table 23, it was found that the combined use of tiafenacil (a1) and S-metolachlor, metribuzin, pyroxasulfone, tri-allate, pethoxamid or dimethenamid-P (a2) increased the total weight of soybean seeds compared to the untreated area and the use of each component alone. Test Compound Dose Total weight of soybean seeds (g) thifenacil+ 12.5+750 34.5 S-metolachlor metribuzin thifenacil+ 12.5+125 43.4 pyroxasulfone thifenacil+ 12.5+625 45.2 tri-allate Test Compound Dose Total weight of soybean seeds weight (9) thiafenacil+ 12.5+750 45.2 pethoxamide thiafenacil+ 12.5+750 50.0 dimethenamide-P thiafenacil 12.5 14.3 S-metolachlor 750 12.7 metribuzin 18.75 14.2 pyroxasulfone 125 15.6 tri-allate 625 17.0 pethoxamide 750 1 1 .0 dimethenamid-P 750 14.1 (Untreated area) - 11.0 From the above results of plant growth promoting effect tests (17) to (23), the growth promoting effects of the composition of the present invention on useful plants were confirmed. The plant growth promoting effect tests (17) to (23) were carried out under conditions where seeds of undesirable plants were sown and therefore by controlling the undesirable plants by the composition of the present invention, the interaction of the undesirable plants with the beneficial plants was reduced, which is considered to be at least one factor in the growth promoting effects of the composition of the present invention on beneficial plants. Therefore, below will be described a test on the plant growth promoting effect of the composition of the present invention on useful plants, which was conducted under conditions where seeds of undesirable plants were not sown. (24) Plant growth promoting effect test (soybean) Upland soil 1/500. A water-based suspension containing tiafenacil as the active ingredient prepared by a conventional method for preparing a water-based suspension and an emulsifiable concentrate containing S-metolachlor as the active ingredient (trade name: Dual Gold, manufactured by Syngenta), a wettable powder containing metribuzin as the active ingredient (trade name: SENCOR wettable powder, manufactured by Bayer Crop Science), water-dispersible granules containing pyroxasulfone as the active ingredient (trade name: Sakura, manufactured by Bayer Crop Science), a wettable powder containing tri-allate as the active ingredient prepared by a conventional method for preparing a wettable powder, an emulsifiable concentrate containing pethoxamide as the active ingredient (trade name: Successor 600, manufactured by Stahler Suisse SA) or an emulsifiable concentrate containing dimethenamide-P as the active ingredient an emulsifiable concentrate (trade name: Fieldstar P emulsifiable concentrate, manufactured by BASF), an agricultural spreader at 0.5% vol (trade name: Destiny HC, manufactured by Winfield Solutions, LLC. (manufactured by ANEST IWATA Corporation) was diluted with water containing 200 litres per hectare of land and sprayed with a small spray gun (model: W-101-132Câ, manufactured by ANEST IWATA Corporation). Soybean seeds (variety: Enrei, Asahi Noen Seed Co. , Ltd. ) was planted in pots after spraying. 48 after October. On the 1st day, the aboveground part of the soybean was harvested and its weight was measured to obtain the total weight. The results are shown in Table 24. From Table 24, it was found that the combined use of tiafenacil (a1) and S-metolachlor, metribuzin, pyroxasulfone, tri-allate, pethoxamid or dimethenamid-P (a2) increased the crude weight of soybeans compared to the untreated area and the use of each component alone. Thus, it has been confirmed that the composition of the present invention has growth promoting effects on soybean under the condition that no undesirable plants are planted. Test Compound Dose Crude weight of soybeans thifenacil+ 3+75 47.7 S-metolachlor thifenacil+ 3+150 53.5 metribuzin thifenacil+ 3+37.5 40.0 pyroxasulfone thifenacil+ 3+200 53.8 tri-allate thifenacil+ 3+200 38.5 pethoxamide thiafenacil+ 3+150 38.0 dimethenamid-P thiafenacil 3 28.3 S-metolachlor 75 27.1 metribuzin 150 16.1 pyroxasulfone 37.5 30.0 tri-allate 200 18.2 Test Compound Dose Crude weight of soybeans pethoxamide 200 26.7 dimethenamide-P 150 28.9 (Untreated area) - 23.2 From the results of the above herbicidal effect tests and plant growth promoting effect tests, it was found that the composition of the present invention has the effects of controlling undesirable plants and promoting the growth of useful plants. The specification, including claims and summary, is filed as of July 29, 2022. TR TR TR TR TR TR TR