CN111357756A - Weeding composition - Google Patents

Abstract

The invention provides a weeding composition, the active components of which consist of halosulfuron-methyl and pendimethalin; the weight ratio of the halosulfuron-methyl to the pendimethalin is 10:1-1: 100. The invention also relates to the use of said herbicidal compositions for controlling undesired vegetation in broadleaf, sedge or grass weeds, in particular in cereal crops, barnyard grass (Echinochloacrus-galli; ECHCG), Leptochloa chinensis (LEFCH), and Cyperus difformis L. The present invention also provides a method for controlling undesired vegetation, which comprises contacting the undesired plants or their growing sites with a herbicidally effective amount of the herbicidal composition of the present invention or applying a herbicidally effective amount of the herbicidal composition of the present invention to soil or water to prevent germination or growth of the undesired plants.

Description

Weeding composition

The application is a divisional application with the patent number of "201510778552. X" and the patent name of "a herbicidal composition" applied by the applicant on 11/16/2015.

Technical Field

The present invention is in the field of pesticides, and in particular relates to a herbicidal composition and a method of controlling undesired vegetation.

Background

The crop production in the world is greatly lost due to diseases, insects and weeds every year, the crops are almost damaged by various weeds in the whole growing season, and the weed damage is also a key factor for restricting the crop yield. Thus, the control of agricultural weeds has been a major concern and important issue in agricultural production.

Protection of crops from weeds and other vegetation that inhibit crop growth is a continuing problem in agriculture. To address this problem, a number of chemicals and chemical formulations have been used commercially to control weed growth.

Halosulfuron-methyl (CAS number 100784-20-1) is a sulfonylurea herbicide, which is a white powdery solid in pure form, has a melting point of 175.5-177.2 ℃, is insoluble in water, and has low solubility in most solvents such as n-hexane, acetone, dichloromethane, toluene, ethyl acetate and the like. Halosulfuron-methyl is the common name for methyl 3-chloro-5- [ [ [ (4, 6-dimethoxy-2-pyrimidinyl) amino ] carbonyl ] amino ] sulfonyl ] -1-methyl-1H-pyrazole-4-carboxylate. Halosulfuron-methyl is a selective systemic conduction type herbicide for sulfonylurea paddy fields. The halosulfuron-methyl is absorbed mainly by root system and also by stem and leaf, and is transferred rapidly in the body of weed plant to inhibit the growth of weed, and the weed dies gradually. Herbicidal activity of halosulfuron-methyl is described in The Pesticide Manual, fourtenth editini, 2006. Halosulfuron-methyl controls many broad leaves and nut sedges in rice, corn, sorghum, sugar cane, nuts and turf.

Pendimethalin (Pendimithalin, Cas RN. 40487-42-1) is also called as field application supplement and is a selective herbicide for treating dry field soil before and after germination. Weeds absorb the agent through the germinating sprouts, and the agent entering the plant body binds to tubulin to inhibit mitosis of plant cells, thereby causing death of the weeds. The pure product is orange crystalline solid, has melting point of 54-58 deg.C, is insoluble in water, and is soluble in organic solvents such as acetone, methanol, xylene, etc. Pendimethalin can be used for preventing and killing annual gramineous weeds, partial broadleaf weeds and nutgrass flatsedge such as barnyard grass, crabgrass, green bristlegrass, moleplant seeds, goosegrass herb, purslane, amaranth, goosegrass herb, abutilon, black nightshade, cyperus rotundus, and the like in various dry farmlands and paddy fields such as cotton, corn, direct-seeding upland rice, soybean, peanut, potato, garlic, cabbage, Chinese cabbage, leek, shallot, ginger and the like, and has better preventing and killing effect on gramineous weeds than broadleaf weeds.

CN102792957A discloses a herbicide composition for preventing and removing farmland weeds, which takes penoxsulam and halosulfuron-methyl as active ingredients, is used for preventing and removing weeds in paddy fields, slows down the generation of weed resistance and has good safety to crops.

CN102934636A discloses a weeding composition containing halosulfuron-methyl and florasulam, which comprises an active component, an auxiliary agent and a carrier, wherein the active component consists of halosulfuron-methyl and florasulam.

CN1212832A discloses a pendimethalin-containing pesticide composition, which comprises the following components in percentage by weight: 4 to 4: 1 pendimethalin and metolachlor, or penetrant azone. Said invention can be made into mixed preparation, not only can raise weed-killing activity, but also can kill weeds in the bud. Is suitable for weeding in fields of various vegetables and crops, and has remarkable social and economic benefits.

The use of chemical herbicides is one of the important marks of modern agriculture, and in recent years, the sale amount of herbicides has increased year by year and the application area has also expanded year by year. However, with the continuous use of large areas of numerous herbicide species, numerous problems arise, such as the onset of emergence of weed resistance problems, particularly of resistance problems in older weeds; in addition, the problems of single action mode, short lasting period and the like of the single herbicide are also prominent. Therefore, there is an urgent need for long-acting herbicides with a wide herbicidal spectrum, strong selectivity and low resistance pressure to weeds.

In some cases, it has been shown that herbicidal active ingredients are more effective in combination than when applied individually, which is known as "synergism". Synergy is the interaction of two or more factors such that when combined the effect is better than would be expected based on the response of each factor when administered separately.

Disclosure of Invention

It is an object of the present invention to provide a herbicidal composition which enables the skilled worker to control a variety of weeds or a weed species which is difficult to control after one or several applications of these herbicides on crops. The present invention achieves the level of weed control desired by the skilled person, even including certain weed species that are difficult to control, in a particularly advantageous manner by combining halosulfuron-methyl and pendimethalin. Moreover, the application of the compositions according to the invention makes it possible to reduce the application rates of the individual components of the combination significantly without unacceptable toxicity to the phytotoxicity of the crop plants.

The present invention is based on the following findings: halosulfuron-methyl and pendimethalin, each of which is known to have herbicidal efficacy, show a synergistic effect when applied in combination.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a weeding composition, which comprises active components of halosulfuron-methyl and pendimethalin; the weight ratio of the halosulfuron-methyl to the pendimethalin is 10:1-1:100, preferably 10:1-1:50, further preferably 10:1-1:25, further preferably 10:1-1:10, more preferably 5:1-1:10, more preferably 1:1-1:10, and more preferably 1:1-1: 5.

The invention provides a weeding composition, which comprises active components of halosulfuron-methyl and pendimethalin, and also comprises a filler and/or a surfactant.

In the weeding composition, the total amount of the halosulfuron-methyl and the pendimethalin accounts for 5-90% of the weight of the weeding composition.

In the weeding composition, the total amount of the halosulfuron-methyl and the pendimethalin accounts for 10-80% of the weight of the weeding composition.

In the weeding composition, the total amount of the halosulfuron-methyl and the pendimethalin accounts for 20-60% of the weight of the weeding composition.

The dosage form of the weeding composition is wettable powder, missible oil, suspending agent, microcapsule, microemulsion, aqueous emulsion, suspending emulsion, water dispersible granule, microcapsule suspension-suspending agent, ultra-low volume liquid, tablet and microcapsule granule.

The weeding composition can also comprise a safener, wherein the safener is at least one of cloquintocet-mexyl, benoxacor, fenclorim, dichlormid, pyraclostrobin or isoxadifen, and the weight ratio of the safener to the total amount of the active components is 1:100-20: 1.

Use of a herbicidal composition for controlling undesired vegetation.

Use of a herbicidal composition for controlling undesired vegetation in grasses, broadleaf weeds and sedge weeds.

Use of a herbicidal composition for controlling undesired vegetation in crops of useful plants. The herbicidal compositions can be used for controlling undesired vegetation of wheat, corn, soybean, sugar beet, sugarcane, cotton, rice, legumes, flax, barley, oats, rye, triticale, oilseed rape, potato, millet, pasture, green or lawn, in plantation of fruit trees or in non-crop areas, weeds of the broad-leaved family, sedges, grasses. In particular to the use for controlling the growth of undesirable plants in broadleaf weeds and sedge weeds in rice crops.

Use of a herbicidal composition for controlling undesired vegetation in crops of useful plants, which is tolerated by the crop of useful plants.

A method for controlling undesired vegetation, comprising: (i) before the undesired plants germinate (pre-emergence); (ii) after undesired plant germination (post-emergence); or (iii) applying a herbicidally effective amount of the herbicidal composition of the present invention to the undesired plants or to the locus thereof at (i) and (ii).

A method for controlling undesired vegetation, the active ingredients halosulfuron-methyl and pendimethalin of the herbicidal composition of the present invention are applied to undesired plants or their growing places either together or separately.

A method of controlling undesired vegetation, which comprises applying the herbicidal compositions of the present invention in the presence of the plants of the useful crops, the seeds of the useful crops or other propagating parts of the useful crops; the herbicidal compositions according to the invention are preferably applied directly to the plants or to the locus of the plants before sowing or germination of the useful crops or after sowing and before germination.

A method for controlling undesired vegetation, which comprises contacting undesired plants or their growing sites with a herbicidally effective amount of the herbicidal composition of the present invention or applying a herbicidally effective amount of the herbicidal composition of the present invention to soil or water to prevent germination or growth of the undesired plants.

Compared with the prior art, the invention has at least the following beneficial effects:

(1) according to the invention, the halosulfuron-methyl and pendimethalin are compounded, so that the activity of the weeding composition exceeds the sum of the activities of the two active compounds when the two active compounds are applied respectively; in addition, the control effect on undesired plants is greatly improved by adjusting the weight percentage and the proportion of the two active compounds, and the herbicidal activity can reach more than 95 percent;

(2) the present invention combines halosulfuron-methyl and pendimethalin in a particularly advantageous manner to achieve the level of weed control desired by the skilled person, even including certain weed species that are difficult to control. Moreover, the application of the composition of the invention can significantly reduce the application amount of the single components in the combination, does not produce unacceptable toxicity to the phytotoxicity of crops, and improves the compatibility with crops.

Detailed Description

The invention provides a weeding composition, the active components of which consist of halosulfuron-methyl and pendimethalin; the weight ratio of the halosulfuron-methyl to the pendimethalin is 10:1-1:100, preferably 10:1-1:50, further preferably 10:1-1:25, further preferably 10:1-1:10, more preferably 5:1-1:10, more preferably 1:1-1:10, and more preferably 1:1-1: 5.

The weight ratio of halosulfuron-methyl and pendimethalin in the present invention may be, for example, 10:1, 8:1, 6:1, 5:1, 1:4, 1:5, 1:6, 1:8, 1:10, 1:12, 1:15, 1:20, 1:25, 1:28, 1:30, 1:33, 1:40, 1:45, 1:50, 1:60, 1:70, 1:80, 1:85, 1:90, 1:95, 1: 100.

"synergistic" results in lower application rates for individual herbicides, greater efficacy at the same application rate, control of previously untreated varieties, control of varieties tolerant or resistant to a single herbicide or multiple herbicides, extended application periods, and/or reduced number of individual applications required; and for the user, a more economically and ecologically advantageous weed control system is obtained.

It has been unexpectedly found that the combination of halosulfuron-methyl and pendimethalin exhibits a synergistic effect on weed control at or below the application rate compared to the application rate of the individual compounds, especially the control of Echinochloa crusgalli (Echcg), Euphorbia chinensis (Leptochloa chinensis; LEFCH), Solanum nigrum (Solanum nigrum L.), Chrysanthemum coronarium (Abution theohrasti Medic), Acalypha australis (Acalanuraustrals L), Cyperus nutgrass (Cyperus nutgrass; Cypes) shows a significant synergistic effect.

Halosulfuron-methyl application rates can vary within wide ranges, for example from 0.1g to 200g a.i./ha (hereinafter, a.i./ha stands for "active substance/hectare" based on 100% pure active compound). When applied at an application rate of 0.1g to 100g a.i./ha, halosulfuron-methyl has a relatively broad spectrum of harmful plants to be controlled when used before sowing, before planting or pre-and post-emergence, for example halosulfuron-methyl is useful for controlling many broad leaves and nut sedges in rice, maize, sorghum, sugar cane, nuts and turf.

The application rate of pendimethalin can vary within a wide range, for example from 1g to 2000g a.i./ha, which has a relatively broad spectrum of harmful plants to be controlled.

Suitable ratio ranges for halosulfuron-methyl and pendimethalin can be determined, for example, by reference to the application rates mentioned for the individual compounds. In the herbicidal compositions of the present invention, the application rate can generally be reduced. In the weeding composition, the weight ratio of the halosulfuron-methyl to the pendimethalin is 10:1-1: 100.

Preferably, the weight ratio of the halosulfuron-methyl to the pendimethalin is 10:1-1: 50.

Particularly, the weight ratio of the halosulfuron-methyl to the pendimethalin is 10:1-1: 25;

more particularly, the weight ratio of the halosulfuron-methyl to the pendimethalin is 10:1-1: 10.

More particularly, the weight ratio of the halosulfuron-methyl to the pendimethalin is 5:1-1: 10.

More particularly, the weight ratio of the halosulfuron-methyl to the pendimethalin is 1:1-1: 10.

More particularly, the weight ratio of the halosulfuron-methyl to the pendimethalin is 1:1-1: 5.

The herbicidal compositions of the present invention may also comprise one or more other active compounds which are different from the halosulfuron-methyl and pendimethalin components and which also act as selective herbicides.

The herbicidal compositions according to the invention may also comprise further components of various active compounds, for example selected from safeners, fungicides, insecticides, acaricides, nematicides, bird repellents, soil conditioners, plant nutrients (fertilizers) and herbicides having a structure other than halosulfuron-methyl and pendimethalin, and plant growth regulators.

Preferably, the different types of agrochemically active compounds include acetochlor (acetochlor), activated ester (acibenzolar), benzothiadiazole (acibenzolar-S-methyl), acifluorfen (acifluorfen), aclonifen (acifluorfen), alachlor (acifluorfen), butachlor (alidochlor), diclofen (allelochloride), ametryn (alloxydim), ametryn (amicarbazone), amidosulfuron (amisulfuron), aminopyralid (amizopyralid), fentrazone (amicarbazone), amicarbazone (amicarbazone), sulfamethoxazole (amicarbazone), amicarbazone (amicarbazone), ammonium sulfamate (ammonium sulfamate), pyrimethanil (aminocyclopyramide), pyrifos (aminocyclophos), pyrifos (amicarbazone), pyribenzofenazate (azafenidin), pyrazosulfuron (azasulfuron), fensulfuron (fensulfuron), pyrazosulfuron (fenamidosulfuron), pyribenzosulfuron (pyrazosulfuron), pyrazosulfuron (bensulfuron), pyrazosulfuron (bensulfuron), bensulfuron (bensulfuron), bensulfuron (bensulbensulbensulfuron (bensulfuron), ben, Bromoxynil (bromoxynil), butachlor (butachlor), butafenacil (butafenacil), butralin (butralin), cafenstrole (cafenstrole), acetochlor (carpetamide), carfentrazone (carfentrazone), chlorimuron (chlorimuron-ethyl), chlormequat chloride (chlorimuron), chlorsulfuron (chlorimuron), cinmethyliron (cinmethylin), cinosulfuron (cinosulfuron), clethodim (cyclomethiodim), clomazone (clomazone), chlorambucil (metocloprop), clopyralid (clopyralid), cyanazine (cyazone), cyclazoamide (cyhalocarbazone), pyrimethanil (cyhalosulfuron), pyrimethanil (acetochlor-diethyl), pyrithiobac (fentrazone-methyl), pyrimethanil (pyrimethanil-methyl-diethyl-methyl), pyrimethanil (pyrimethanil-methyl-diethyl), pyrimethanil (pyrimethanil, pyrimethanil (pyrimethanil-methyl-diethyl-methyl), pyrimethanil (pyrimethanil, pyrimethanil-methyl-diethyl-methyl-diethyl-methyl), pyrimethanil (pyrimethanil, pyrimethanil (pyrimethanil, pyrimethanil (pyrimethanil, diflufenzopyr-sodium, dazomet (dimefuron), dimeflufen (dimepiperate), dimethachlor (dimethachloride), isoethazine (dimethametryn), diphenpyrad (diphenamid), ipratron (diprotin), diquat (diquat), diuron (diuron), ethametsulfuron (ethametsulfuron), ethametsulfuron-methyl, ethephon (ethephon), thifensulfuron (ethidium), ethoxysulfuron (ethofencuron), ethoxybencarb (etobenazenide), fenoxaprop (fenoxaprop-P), fenoxaprop (fenoxaprop-ethyl), fenoxaprop (fentrazamide), flufensulfuron (flufenuron), flufenuron (flufenuron), fluazifop-butyl (flufenuron), flufenuron (flufenuron-P), flufenuron (P), flufenuron (flufenuron), flubenuron (flubenuron), flubensulfuron-P), flubensulfuron-P-methyl), flubensulfuron-methyl (flubensulfuron-methyl), bensulfuron-methyl, flubensulfuron-methyl, bensulfuron-methyl, ben, Flufenacet (flufenacet), flumetralin (fluetrolin), flumetsulam (fluetsulam), flumioxazin (fludioxozin), propyzamide (fluipropyn), fluometuron (fluometron), flunitrapyrin (fluxofenan), flupyrsulfuron (flupirufuron), flupyridinone (fluridone), fludioxonil (fluorooridone), fluroxypyr (fluxapyl), flurtamone (fluxofenamide), oxamide (fluthiamide), fomesafen (mesafen), glufosinate (glufosinate), glufosinate-ammonium (glyphosate-ammonium), glufosinate-ammonium (P-glufosinate), pyraflufen-P (glyphosate-ammonium), pyraflufenamate-ammonium (glyphosate-ammonium), pyraflufen (glyphosate-ammonium), pyraflufenamate-sodium (glyphosate-ammonium), pyraflufen-sodium (glyphosate-ammonium), pyraflufenamate), pyraflufen-ammonium (ammonium-ammonium (glyphosate-ammonium-sodium), glyphosate-ammonium (glyphosate-ammonium-sulfate (glyphosate-ammonium salt (P-ammonium salt (glyphosate-ammonium salt), glyphosate-ammonium salt (glyphosate-ammonium salt, glyphosate-ammonium salt (glyphosate-ammonium salt, fluazifop-P-ethoxyethyl, haloxyfop-methyl, haloxyfop-P-methyl, hexazinone, imazamethabenz-z, imazamethabenz-P-methyl, imazamox, imazapic, imazapyr, imazazapyr, imazazapic, imazapyr-amonium, imazapyr, imazosulfuron, isofenuron, isofenpyrofenuron, isofenpyroxene, isofenpyrofenuron, isofenpyrazone, isofenpyrofenuron, isofenpyrofenpyrazone, isofenpyrofenpyrofenpyrazone, isofenpyrofenpyrazone, isofenpyrofenpyrofenpyrazone, isofenpyrofenpyrazone, isofenpyrofenpyrozone, isofenpyrozone, or isofenpyrozone, mepiquat-chloride, mesosulfuron (mesosulfuron-methyl), mesotrione (mesotrione), methabenzthiazuron (methabenzthiazuron), metamitron (metamitron), metazachlor (metazachlor), imazazole (methazole), methidathion (methapyr-sulfuron), tralkoxydim (methamphetamine), metolachlor (methalochlor), metolachlor (S-metolachlor), sulfentrazone (methazolamide), metoxuron (methaxolone), metribuzin (metribuzin), metsulfuron (methasulfuron-methyl), metosulcotrione (methyl-ethyl), metosulam (metosulam), metosuluron (metosulpon), metosulam (metosuluron), metosulam (metosulam), metosuluron (metosulponin-methyl), metosulponin (metosulponuron-methyl), metosulponin (metosulponin), metosulponuron (metosulponin), metosulponin (metosulponuron (metosulponin), metosulponin (metosulponuron (metosulponin), metosulponuron (metosulponin), metosulponuron (metosulponin), metosulponuron (metosulponin), metosulponin (metosulponin), metosulponuron (metosulponin), metosulponuron (, Pentoxazone (pentoxazone), pethoxamid (petoxamid), picloram (picloram), picolinic acid (picolinafen), picolinafen (picolinafen), pinoxaden (pinoxaden), piperophos (piprophos), pretilachlor (pretilachlor), probenazole (probenazole), flumetsulam (profluorazole), profluralin (profluorine), clofenac (profroxydim), prometryn (prometryn), propanil (propanil), prometryn (propazone), propapholate (propiconazole), propisochlor (propyzamide), propyzamide (propyzamide), prosulb (prosulfon), fluosulfuron (propaferon), propaferin (propaferon), pyriproxyfen (propyrifos), pyriproxyfen (pyriproxyfen), pyrithion (pyriproxyfen-ethyl), pyriproxyfen (pyriproxyfen), pyriproxyfen (isopropyl), pyributirifen), pyributin (pyriproxyfen (isopropyl), pyributin (pyriproxyfen), pyriproxyfen (pyriproxyfen), pyributil), pyributiri, pyrifturon (, Pyriproxyfen (pyrimisulfan), pyrithiobac-methyl (pyrithiobac-sodium), pyroxasulfofone (pyroxsulam), quinclorac (quinchlon), quinclorac (quinzalofop-P), ethyl quizalofop-P-ethyl), rimsulfuron (rimsulfuron), saflufenacil (saflufenacil), sec-butron (secbutufoton), sethoxydim (sethoxydim), siduron (siduron), sulfotrione (sulfofentrazone), sulfentrazone (sulfofentrazone), thifenuron (sulfouron-meturon), thifensulfuron-methyl (thiuron), thifensulfuron-methyl (thifensulfuron-methyl), thifensulfuron-methyl (thifensulfuron-ethyl), thifensulfuron-ethyl (thifensulfuron-ethyl), thifensulfuron-methyl (thifensulfuron-ethyl), thifensulfuron-ethyl, thifensulfuron (thifenpyroxim, thiuron (thiuron, thiuron (thifensulfuron), thiuron (thifensulfuron-ethyl), thifenpyroxafen, thifensulfuron-ethyl), thifenpyroxauron (thifenpyroxafen, thifenpyroxas), thifenpyroxas (thifenpyroxas, thiuron (thifenpyroxas, thifenpyro, Trifluralin (trifluralin), triflusulfuron (triflusulfuron), triflusulfuron methyl ester (triflusulfuron-methyl), tritron (trimeturon), trinexapac-ethyl (trinexapac, trinexapac-ethyl), triflusulfuron (tritosulfuron), tsutodef, uniconazole (uniconazole).

When the weeding composition is used together with glyphosate, glufosinate-ammonium, dicamba, imidazolinone, sulfonylurea, 2,4-D and the like, crops to be applied are glyphosate, glufosinate-ammonium, dicamba, imidazolinone, sulfonylurea or 2,4-D tolerant crops.

Although the halosulfuron-methyl and pendimethalin already show good or even sufficient selectivity in a large number of crops, in principle phytotoxicity to the crop plants may occur in some crops, in particular also in combination with other less selective herbicides. Compositions comprising the herbicidal compositions according to the present invention together with one or more safeners are particularly advantageous. The safeners are used in antidotally effective amounts, for example to reduce the phytotoxic side effects of the herbicides used in economically important crops or in fruit plantations (plantation crops). Such as cereals (wheat, barley, rye, oats, maize, rice and millet), sugar beet, sugar cane, oilseed rape, cotton and soybeans, preferably cereals, in particular rice.

The following are, for example, compounds suitable as safeners (including possible stereoisomers and agriculturally commonly used esters or salts): benoxacor (benoxacor), carbosulfan (benthiocarb), cloquintocet (-mexyl), brassinolide (brassinolide), cyclomethicone (cyclotrinil), cyprosulfamide, dimepiperate (dimepipe), dichlormid (dichlormid), dicyclonon, o-phenylthiophosphate o, o-diethyl ester (dietholate), fenchlorazole (-ethyl)), fenclorim (fenclorim), flurazole (flurazole), fluxoxime (fluxofenim), furazol (furilazole), disulfoton (disulfop), isoxadifen (-ethyl)), pyrazofen (mefenofibrate)), 4-chlorophenyl methylcarbamate (methylphenidate), naphthoxynil (naphthoxynil).

Some safeners are known to act as herbicides and, accordingly, to act to protect crop plants in addition to having a herbicidal effect on harmful plants.

The weight ratio of herbicidal composition to safener generally depends on the application rate of the herbicide and on the effect of the safener and can vary within wide limits, for example within the range from 90000:1 to 1:5000, preferably within the range from 7000:1 to 1:1600, in particular within the range from 3000:1 to 1:500, in particular within the range from 1:100 to 20: 1. Safeners can be formulated with halosulfuron-methyl and pendimethalin as finished formulations or supplied and used as tank mixes with the herbicidal compositions.

The invention provides the use of a herbicidal composition for controlling undesired vegetation.

The invention provides an application of a weeding composition in preventing and killing undesirable vegetation of broadleaf weeds, cyperaceae weeds and gramineous weeds.

The herbicidal composition of the present invention has excellent herbicidal activity against a wide spectrum of economically important monocotyledonous and dicotyledonous harmful plants such as broadleaf weeds, grasses or cyperaceae plants, including species resistant to herbicidally active compounds such as glyphosate, glufosinate, atrazine, imidazolinone herbicides and sulfonylureas.

There may be mentioned some representative specific examples of the monocotyledonous and dicotyledonous weed flora which can be controlled by the herbicidal composition of the present invention, but is not limited to certain species.

Examples of weed species on which the herbicidal composition acts effectively are, for example, in monocotyledonous weeds, genera such as barnyard grass (Echinochloa spp.), Panicum (Panicum spp.), precocious grass (Poa spp.), leptospora (Leptochloa spp.), leptospermum (Brachiaria spp.), Digitaria spp.), Setaria (Setaria spp.), sedge (Cyperus), primula spp (Monochoria spp.), pennycress (filiaria spp.), pennywort, arrowhead (sagittaria spp.), water chestnut (Eleocharis spp.), skilfra spp.), skilfora (Eleocharis spp.), skilfora sp, alisma (alisma spp.), alisma spp., klessly (alisma spp.), peliza spp., pelamia sp., oryza, and the like: echinochloa barnyard grass (Echinochloryzicola), Monochoria vaginalis (Monochoria vagianalis), Yak grass (Eleocharis acicularis), Equisetum hiemalis (Eleocharis kuwa), Cyperus difformis (Cyperus difformis), Saxifraga nutans (Cyperus serotinas), Sagittaria sagittifolia (Sagittaria pymaea), Oriental Waterplantain rhizome (Alisma canarietum), and Iris lactea (Scirpus juncoides). In the case of dicotyledonous weeds, the spectrum of activity extends to genera such as Polygonum (Polygonum spp.), Odonopodium (Rotala spp.), Matricaria (Lindernia spp.), Bidenssp, Phlebia (Sphenoclea spp.), Tabania (Dopatrium spp.), Eclipta (Eclipta spp.), Stellaria (Elatine spp.), Calligonum (Gratiaceae spp.), Matricaria (Lindernia spp.), Ludwigia spp.), Oenanthes (Oenanthe spp.), Sagittaria (Elatine spp.), Ostertagia spp.), Matricaria (Lindernia spp.), Ludwigia spp.), Oenanthes (Oenanthe spp.), Ranunculus (Ranunculus spp.), Mucunea (Ranunculus spp.), and Mucospinus (deinsectip). In particular species such as: echinochloa crusgalli (Echcg), Euphorbia lathyris (Leptochloa chinensis; Lefch), yellow nutgrass (yellow nutgrass) (Cyperus esculentus; CYPES), Cyperus difformis (Cyperus difformis L), Solanum nigrum (Solanum nigrum L.), Abelmoschus manihot (Abuti theophila medicinal), Acalyphaea tetragona (Acanthopanax gracilistylus L), Arthrospira japonica (Rotalaria sinica), Sphenoclea zeatica (Sphenoclea zeatica), Veronica procumbens (Lindernia procumbens), Eupatorium adenophora (Ludwigia prostrata), Eupatorium odoratum (Potamansegentis), Populegium fistulosum (Potamariella), Potentilla chinensis (Elsantriana), and Oenanthe root of Oenanthesaurea javanica (Oenanthes ja).

The invention also provides for the use of a herbicidal composition for controlling undesired vegetation in crops of useful plants.

The herbicidal composition of the present invention can be used, for example, in agricultural fields for cultivating the following useful crops:

food crops, for example, include:

cereals (small grains) such as wheat (Triticum aestivum) and wheat crops such as durum wheat (t.durum), einkorn (t.monococcum), emmer (t.dicoccun) and spelt (t.spelta), rye (Secale), triticale (triticale), barley (Hordeum vulgare);

corn (Zea mays);

sorghum (e.g., sweet Sorghum (Sorghum bicolour));

rice (Oryza) such as rice (Oryza sativa) and african rice (Oryzaglaberrima);

sugar cane;

legumes (legumae), including for example soybeans (Glycine max.), peanuts (arachis hypogaea) and legume crops such as peas (including peas (Pisum sativum), pigeon peas and cowpeas), beans (including broad beans (Vicia faba), Vigna nigra (Vigna nigra) and Vigna nigra (Phaseolus)), and lentils (lentils var lentils);

cruciferae families, including, for example, canola (Brassica napus), rape (Brassica napus), cabbage (b.oleracea var.), mustard such as mustard (b.juncea), chinese cabbage (b.campestis), chinese tarda (b.narinosa), black mustard (b.nigra), and mediterranean turnip (b.tournefortii); and turnip (Brassicapa var.);

other broad leaf crops, including, for example, sunflower, cotton, flax, linseed, sugar beet, potato, and tomato;

TNV crops (TNV: trees, nuts and vines), including, for example, grapes, citrus, pome fruits, such as apples and pears, coffee, pistachios and oil palms, stone fruits, such as peaches, almonds, walnuts, olives, cherries, plums and apricots;

turf, pasture and pasture;

onion and garlic;

bulb ornamentals such as tulip and narcissus;

conifers and deciduous trees such as Pinus (Pinus), fir, oak, maple, dogwood, hawthorn, crabapple and Rhamnus (Rhamnus);

garden ornamentals such as petunia, marigold, roses and snapdragon.

The herbicidal compositions according to the invention are particularly suitable for controlling the growth of control/undesired vegetation in wheat, barley, rye, triticale, durum, rice, maize, sugarcane, sorghum, soybean, pulse crops such as pea, bean and lentils, peanut, sunflower, sugarbeet, potato, cotton, brassica crops such as oilseed rape, canola, mustard, cabbage and turnip, turf, grapes, pome fruit such as apple and pear, stone fruit such as peach, almond, walnut, olive, cherry, plum and apricot, citrus, coffee, pistachio, garden ornamentals such as rose, petunia, marigold, snapdragon, bulb ornamentals such as tulip and narcissus, conifers and deciduous trees such as pinus, fir, oak, maple, dogwood, hawthorn, crabapple.

The herbicidal compositions according to the invention are most suitable for controlling undesirable vegetation in wheat, barley, rye, triticale, durum, rice, maize, sugarcane, sorghum, soybean, pulse crops such as pea, bean and lentil, peanut, sunflower, sugarbeet, potato, cotton, brassica crops such as oilseed rape, canola, mustard, cabbage and turnip, turf, grapes, stonefruits such as peach, almond, walnut, olive, cherry, plum and apricot, citrus and pistachio.

In particular in crops such as wheat, barley, rye, rice, maize, sugar cane, sorghum, pulse crops, peanuts, sunflowers, sugar beet, potatoes, cotton, brassica crops, turf, grapes, pome fruit, stone fruit, citrus, coffee, pistachio, garden ornamentals, conifers and deciduous trees, they are effective in controlling broadleaf weeds, grasses and sedge weeds without causing substantial damage to the crop.

The herbicidal compositions of the present invention are particularly suitable for controlling the growth of undesirable vegetation in cereal crops. For example, the herbicidal compositions of the present invention show a significant synergistic effect on the control of Echinochloa crusgalli (ECHCG), Leptochloa chinensis (LEFCH), yellow nutgrass (yellow nutgrass) (Cyperus esculentus; CYPES), Cyperus difformis (Cyperus difformis L), Solanum nigrum (Solanum nigrum L.), Chrysanthemum coronarium (Abutilothenothamasic), Acalypha australis (Acalantia stralissimal).

The herbicidal compositions of the present invention also provide excellent control of the growth of undesirable vegetation in non-crop areas. Non-crop areas such as roads, railways, lawns, utility lines, and particularly in areas where trees are present, undesirable vegetation.

The herbicidal compositions of the present invention may also be used for crop plants that are resistant to one or more herbicides due to genetic engineering or breeding, resistant to one or more pathogens, such as phytopathogenic fungi, due to genetic engineering or breeding or resistant to insect infestation due to genetic engineering or breeding. Suitable are, for example, crops which are resistant to synthetic auxins, preferably maize, wheat, sunflower, rice, canola, oilseed rape, soybean, cotton and sugar cane, or crops which are resistant to attack by certain insects as a result of introduction of genes for Bt toxins by genetic modification.

Use of a herbicidal composition for controlling undesired vegetation in crops of useful plants, which is tolerated by the crop of useful plants.

The herbicidal compositions of the present invention are highly suitable for the selective control of undesired vegetation in cereal crops, particularly preferably rice. The rice crop includes all possible forms of rice plant cultivation under the most diversified conditions, such as dry field cultivation, dry field cultivation or paddy field cultivation, in which irrigation may be natural (rainfall) and/or artificial (irrigation). The rice used for this purpose may be conventionally cultivated seeds, hybrid seeds or seeds with resistance-at least tolerance (obtained by mutation or transgenesis), which may be derived from indica or japonica varieties or hybrids thereof.

The present invention provides a method for controlling undesired vegetation by applying halosulfuron-methyl and pendimethalin of the herbicidal composition of the present invention to undesired plants or their growing places, either together or separately.

A method for controlling undesired vegetation, comprising: (i) before the undesired plants germinate (pre-emergence); (ii) after undesired plant germination (post-emergence); or (iii) applying a herbicidally effective amount of the herbicidal composition of the present invention to the undesired plants or to the locus thereof at (i) and (ii). Preferably, the application of the germinated undesired vegetation (e.g. broadleaf weeds, grasses, cyperaceae or undesired crop plants) is also carried out before the undesired vegetation germinates, irrespective of the growth period of the sown/planted crop.

A method for controlling undesired vegetation, which comprises contacting undesired plants or their growing sites with a herbicidally effective amount of the herbicidal composition of the present invention or applying a herbicidally effective amount of the herbicidal composition of the present invention to soil or water to prevent germination or growth of the undesired plants.

The weeding composition comprises effective amounts of halosulfuron-methyl and pendimethalin and has a synergistic effect. Synergy is observed when halosulfuron-methyl and pendimethalin are applied together or nearly simultaneously; synergy is also observed when halosulfuron-methyl and pendimethalin are applied separately at different times; halosulfuron-methyl and pendimethalin may also be applied sequentially, for example, pre-emergence and post-emergence, or early post-emergence and then mid-or late post-emergence. It is preferred here to apply halosulfuron-methyl and pendimethalin jointly or virtually simultaneously, and it is particularly preferred to apply them jointly.

If the herbicidal composition of the present invention is applied to the soil surface before germination, the weed seedlings are completely prevented from germinating, or the weeds grow to the cotyledon stage, but then they stop growing, and finally die completely after two to four weeks.

If the active compound is applied to the green parts of the plants after germination, the growth likewise stops sharply within a relatively short time after the treatment, and the weed plants remain in the growth phase at the point in time of application, or they die completely after a certain time, in such a way that the competition caused by the weeds which are harmful to the crop plants is eliminated earlier and continuously. For rice, the herbicidal composition may also be applied in water, which is then absorbed through the soil, shoots and roots.

When halosulfuron-methyl and pendimethalin are co-administered, there is a synergistic effect. Here, the activity of the composition is higher than the expected sum of the activities of the individual herbicides applied. The synergistic effect allows a reduction in the application rates, a broader spectrum of broadleaf weeds, grasses and cyperaceae to be controlled, a faster onset of action of the herbicidal action, a longer duration, a better control of harmful plants by only one or a few applications and a widening of the application period. The dosage used in the herbicidal composition and the effective dosages of halosulfuron-methyl and pendimethalin can be adjusted to lower levels to minimize the effect on the soil. This allows the herbicidal compositions of the present invention to be applied not only to sensitive crops but also almost avoid groundwater contamination. The herbicidal compositions of the present invention allow for a significant reduction in the required application rate of the active ingredient.

The above characteristics and advantages are necessary for weed control to keep agricultural/forestry/horticultural crops or greens/grasslands free from undesired competing plants, thereby ensuring and/or increasing the yield level of useful crops from the point of view of quality and quantity. Such herbicidal compositions significantly exceed the state of the art in terms of said properties.

The present invention also provides a method of controlling undesired vegetation which comprises applying the herbicidal compositions of the present invention in the presence of the plants of the useful crop, the seeds of the useful crop or other reproductive parts of the useful crop. The herbicidal compositions according to the invention are preferably applied directly to the plants or to the locus of the plants before sowing or germination of the useful crops or after sowing and before germination.

The present invention also provides a method for controlling undesired vegetation, preferably in crops of useful plants, in particular in crops of cereals, which comprises applying halosulfuron-methyl and pendimethalin as active ingredients of the herbicidal compositions according to the invention, for example, jointly or separately to plants (for example undesired plants, such as monocotyledonous or dicotyledonous broadleaf weeds, grasses, cyperaceae or undesired crop plants), seeds (for example caryopsis, seeds or asexual propagation organs, for example tubers and sprouted branches), or to areas where plants grow (for example to areas of cultivation, which may also be covered with water). One herbicide may be applied to the plant, seed, or area where the plant is growing (e.g., the area of cultivation) before, after, or simultaneously with another herbicide.

The herbicidal compositions of the present invention may be applied in a conventional manner by using techniques well known to those skilled in the art. Suitable techniques include spraying, atomizing, dusting, broadcasting or pouring. The type of application depends in a well-known manner on the intended purpose; in any case, the technique should ensure the best possible distribution of the active ingredients according to the invention.

If the active ingredient is not well tolerated by certain crops, the herbicidal compositions can be directed to spray with the aid of a spray device so that they contact the sensitive crop as little as possible when they reach the foliage or bare soil of the undesirable plants growing below.

The method of the invention is most preferably used for controlling weeds in the area where the crop is growing or will be used for growing the crop, by unwanted plants or their locus. When applied to a crop growing area, the application rate should be sufficient to control weed growth without causing serious permanent damage to the crop.

"undesirable plants" are understood to mean all plants which grow in places where their growth is not desired. These may be, for example, harmful plants (for example monocotyledonous or dicotyledonous weeds, grasses, cyperaceae or unwanted crop plants), including, for example, those which are resistant to certain herbicidally active compounds (for example glyphosate, glufosinate, atrazine, imidazolinone herbicides and sulfonylureas).

The herbicidal composition of the present invention can be applied by various application methods commonly used for herbicides for rice. Particularly preferably, it is applied by spray application and/or by dip application. In the dip application, the water in the paddy field has covered the ground up to 3-20cm at the time of application. The herbicidal composition of the present invention is then placed directly in the water of the paddy field. Worldwide, spray application is mainly used for directly sown rice, while dip application is mainly used for transplanted rice.

The invention also provides a weeding composition, which comprises the active components of halosulfuron-methyl and pendimethalin, and also comprises a filler and/or a surfactant. In the weeding composition, the total amount of the halosulfuron-methyl and the pendimethalin accounts for 5-90%, preferably 10-80%, and more preferably 20-60% of the weight of the weeding composition.

The total amount of halosulfuron-methyl and pendimethalin may also constitute 5%, 8%, 10%, 12%, 15%, 18%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 60%, 70%, 75%, 80%, 85%, 90% by weight of the herbicidal composition.

The herbicidal composition of the present invention can be converted into conventional formulations such as wettable powders, emulsifiable concentrates, suspensions, microcapsules, microemulsions, aqueous emulsions, suspoemulsions, water dispersible granules, microcapsule suspension-suspensions, ultra-low volume liquids, tablets, microcapsule granules.

According to the present invention, the term "bulking agent" refers to natural or synthetic organic or inorganic compounds that can be combined or associated with an active ingredient to make it easier to apply to a subject (e.g., a plant, crop or grass). Thus, the filler is preferably inert, at least should be agriculturally acceptable. The filler may be solid or liquid.

Suitable solid carriers are: for example, vegetable powders (for example, particles of soybean powder, starch, cereal powder, wood powder, bark powder, saw dust, walnut shell powder, bran, cellulose powder, coconut shell, corn cob and tobacco stalk, and residues after extraction of plant essence), clays (for example, kaolin, bentonite, acid china clay, etc.), and talc powders. Silica (for example, diatomaceous earth, silica sand, mica, hydrous silicic acid, calcium silicate), activated carbon, natural minerals (for example, pumice, attapulgite, zeolite, etc.), calcined diatomaceous earth, sand, plastic media (for example, polyethylene, polypropylene, polyvinylidene chloride, etc.), inorganic mineral powders such as potassium chloride, calcium carbonate, calcium phosphate, etc., chemical fertilizers such as ammonium sulfate, ammonium phosphate, urea, ammonium chloride, etc., and soil fertilizers, and these may be used alone or in combination of 2 or more.

Suitable liquid carriers may be selected from, for example, water, alcohols (e.g., methanol, ethanol, isopropanol, butanol, ethylene glycol, etc.), ketones (e.g., acetone, methyl ethyl ketone, diisobutyl ketone, cyclohexanone, etc.), ethers (e.g., diethyl ether, dioxane, methyl cellulose, tetrahydrofuran, etc.), aliphatic hydrocarbons (e.g., kerosene, mineral oil, etc.), aromatic hydrocarbons (e.g., benzene, toluene, xylene, mineral spirits, alkylnaphthalenes, chlorinated aromatic hydrocarbons, chlorinated aliphatic hydrocarbons, chlorobenzene, etc.), halogenated hydrocarbons, amides, sulfones, dimethyl sulfoxide, mineral and vegetable oils, animal oils, etc.

Suitable surfactants are emulsifiers, dispersants or wetting agents of an ionic or nonionic nature, or mixtures of these surfactants. Suitable examples of such surfactants include fatty alcohol-polyoxyethylene ethers, polyoxyethylene alkylaryl ethers, polyoxyethylene higher fatty acid esters, phosphoric acid esters of polyoxyethylene alcohols or phenols, fatty acid esters of polyhydric alcohols, sodium alkylaryl sulfonates, naphthalenesulfonic acid polymers, lignosulfonates, high-molecular comb-shaped dendritic copolymers, butylnaphthalenesulfonates, alkylaryl sulfonates, sodium alkylsulfosuccinates, fats and oils, polyacrylic acid salts such as condensates of fatty alcohols with ethylene oxide and alkyltaurates, and protein hydrolysates. Suitable oligosaccharides or polymers are based, for example, on ethylene monomers, acrylic acid, polyoxyethylene or polyoxypropylene alone or in combination with, for example, (poly) alcohols or (poly) amines. When one of the active compounds and/or one of the inert carriers is insoluble in water and when applied in water, a surfactant must be present. The proportion of the surfactant is 5% -40% of the herbicidal composition of the present invention.

If appropriate, the herbicidal compositions according to the invention may also be provided with further additional components, for example protective colloids, adhesives, thickeners, thixotropic agents, penetrants, stabilizers, sequestering agents, complex-forming agents. In general, the active ingredient may be combined with any solid or liquid additive conventionally used for formulation purposes.

The herbicidal composition of the present invention can be prepared by mixing the active ingredient with at least one of the following substances in a known manner: liquid or solid carriers, emulsifiers, dispersants, wetting agents and/or protective colloids, binders, adhesives, thickeners, thixotropic agents, penetrating agents, stabilizers, sequestering agents, complex-forming agents, water and further processing aids.

The herbicidal compositions according to the invention can be formulated, for example, by known methods as mixed preparations of the individual components, if appropriate with further active compounds, additives and/or customary formulation auxiliaries, and the compositions are then diluted with water in a customary manner and applied; or can be formulated as a tank mix by diluting the separately formulated or partially separately formulated components together with water. It is also possible to apply the components separately or partly separately. The herbicide or herbicidal composition can also be used in multiple parts (sequential application), for example first as a seed dressing application or pre-sowing/pre-planting treatment or pre-emergence application followed by post-emergence application or early post-emergence application, followed by mid-or late-emergence application. Preference is given here to using the active compounds of the composition together or almost simultaneously, particular preference being given to co-administration.

The method of application may be selected according to the intended subject and prevailing circumstances, such as foliar, drench, spray, dusting, scattering, according to the nature of the formulation.

Halosulfuron-methyl and pendimethalin can be applied as such, in the form of their formulations or in the use forms prepared therefrom by further dilution, such as ready-to-use solutions, suspensions, emulsions, powders, pastes and granules. They can be applied in a conventional manner, for example by pouring, spraying, atomizing or broadcasting.

The herbicidal compositions of the present invention have a more easily used form because the amounts of the components are already in optimal proportions. In addition, the auxiliaries in the formulations can be adjusted to one another for optimization.

Formulation examples

Example 160% halosulfuron-methyl +6% pendimethalin suspension

Halosulfuron-methyl 60%

Pendimethalin 6%

10 percent of oleoyl methyl sodium taurate

Sorbitan fatty acid ester 5%

1 percent of bentonite

Glycerol 5%

The water is complemented to 100 percent

The active component, the dispersant, the wetting agent, the water and the like are uniformly mixed according to the proportion of the formula, and the suspending agent of 60 percent halosulfuron-methyl and 6 percent pendimethalin is obtained after grinding and/or high-speed shearing.

Example 22% halosulfuron-methyl +10% pendimethalin wettable powder

2 percent of halosulfuron-methyl

Pendimethalin 10%

Sodium butylnaphthalenesulfonate 10%

Sodium dipolyoxyethylene dodecyl ether phosphate 5%

White carbon black 10%

Kaolin is complemented to 100%

Mixing the active components, various auxiliary agents, fillers and the like according to the proportion of the formula, and crushing the mixture by an ultrafine crusher to obtain the wettable powder of 2 percent halosulfuron-methyl and 10 percent pendimethalin.

Example 310% halosulfuron-methyl +10% pendimethalin wettable powder

10 percent of halosulfuron-methyl

Pendimethalin 10%

Glycerin fatty acid polyoxyethylene ether 1%

Sodium lignosulfonate 2%

White carbon black to complement to 100 percent

Mixing the active components, various auxiliary agents, fillers and the like according to the proportion of the formula, and crushing the mixture by an ultrafine crusher to obtain the wettable powder of 10 percent halosulfuron-methyl and 10 percent pendimethalin.

Example 420% halosulfuron-methyl +60% pendimethalin Water dispersible granules

Halosulfuron-methyl 20%

Pendimethalin 60%

Sodium polyoxyethylene lauryl ether carboxylate 6%

Sodium dodecyl sulfate 5%

5 percent of ammonium sulfate

Kaolin is complemented to 100%

The active component, the dispersant, the wetting agent, the disintegrant and the filler are uniformly mixed according to the proportion of the formula, and are crushed into wettable powder by airflow, and a certain amount of water is added for mixing and extrusion molding. The water dispersible granules of 20 percent halosulfuron-methyl and 60 percent pendimethalin are obtained after drying and screening.

Example 52% halosulfuron-methyl +20% pendimethalin emulsifiable concentrate

2 percent of halosulfuron-methyl

20 percent of pendimethalin

Ethoxylated castor oil 5%

Calcium dodecyl benzene sulfonate 3%

SOLVESSO^TM200 to 100%

The components are prepared according to the proportion and are uniformly stirred to obtain a uniform phase, and the emulsifiable concentrate of 2 percent of halosulfuron-methyl and 20 percent of pendimethalin is obtained.

Example 610% halosulfuron-methyl +10% pendimethalin suspoemulsion

10 percent of halosulfuron-methyl

Pendimethalin 10%

N-lauroyl sodium glutamate 5%

Ethoxylated castor oil 3%

1 percent of bentonite

SOLVESSO^TM100 20%

The water is complemented to 100 percent

Grinding and/or shearing halosulfuron-methyl, a sodium methyl naphthalene sulfonate formaldehyde condensate and corn oil at a high speed to obtain a halosulfuron-methyl suspending agent; mixing pendimethalin and Solvesso^TM100. The ethoxylated castor oil is mixed and stirred evenly to obtain the second productMetalaxyl emulsifiable concentrate; the pendimethalin emulsifiable concentrate is added into a halosulfuron-methyl suspending agent to obtain a 10% halosulfuron-methyl and 10% pendimethalin suspending emulsion.

Example 710% halosulfuron-methyl +50% pendimethalin wettable powder

10 percent of halosulfuron-methyl

50 percent of pendimethalin

Sodium dodecyl sulfate 6%

Sodium methylene dinaphthalenesulfonate 3%

20 percent of white carbon black

Kaolin is complemented to 100%

The components are mixed according to a proportion, ground and crushed to prepare the wettable powder of 10 percent halosulfuron-methyl and 50 percent pendimethalin.

Example 85% halosulfuron-methyl +50% pendimethalin Water dispersible granules

Halosulfuron-methyl 5%

50 percent of pendimethalin

5 percent of modified calcium lignosulfonate

Sodium dodecyl sulfate 3%

1 percent of sodium chloride

Kaolin is complemented to 100%

Uniformly mixing the halosulfuron-methyl, the pendimethalin active component, the dispersant, the wetting agent, the disintegrant and the filler according to the proportion of the formula, and crushing the mixture into wettable powder by air flow; adding a certain amount of water, mixing and extruding to obtain the finished product. And drying and screening to obtain the water dispersible granule of 5 percent halosulfuron-methyl and 50 percent pendimethalin.

Example 91% halosulfuron-methyl +10% pendimethalin aqueous emulsion

Oil phase:

1 percent of halosulfuron-methyl

Pendimethalin 10%

Oleic acid methyl ester 10%

Ethoxylated castor oil 5%

Water phase:

sodium salt of sulfonated naphthalene sulfonic acid-formaldehyde condensation product 1%

The water is complemented to 100 percent

Dissolving halosulfuron-methyl and pendimethalin in methyl oleate, and adding ethoxylated castor oil to obtain an oil phase; uniformly mixing sodium salt of a sulfonated naphthalene sulfonic acid-formaldehyde condensation product and water according to a formula to obtain a water phase; adding the oil phase into the water phase under stirring to obtain the 1% halosulfuron-methyl and 10% pendimethalin aqueous emulsion.

Example 1025% halosulfuron-methyl +5% pendimethalin wettable powder

Halosulfuron-methyl 25%

Pendimethalin 5%

Octyl phenol polyoxyethylene ether sulfate 1%

Sodium lauryl sulfate 2%

1% of highly dispersed silicic acid

Sodium carbonate 10%

Kaolin is complemented to 100%

The components are mixed according to a proportion, ground and crushed to prepare wettable powder of 25 percent halosulfuron-methyl and 5 percent pendimethalin.

Example 111% halosulfuron-methyl +10% pendimethalin coated granules

1 percent of halosulfuron-methyl

Pendimethalin 10%

3 percent of polyethylene glycol

1% of highly dispersed silicic acid

Calcium carbonate to make up to 100%

Dustless coated granules of 1% halosulfuron-methyl +10% pendimethalin are obtained in this way by uniformly applying the finely ground active ingredient to a carrier moistened with polyethylene glycol in a mixer.

Example 1210% halosulfuron-methyl +1% pendimethalin wettable powder

10 percent of halosulfuron-methyl

1 percent of pendimethalin

Sodium dodecyl sulfate 5%

Sodium lignosulfonate 5%

Kaolin is complemented to 100%

The components are mixed according to a proportion, ground and crushed to prepare the wettable powder of 10 percent halosulfuron-methyl and 1 percent pendimethalin.

Example 135% halosulfuron-methyl +25% pendimethalin extruded granules

Halosulfuron-methyl 5%

Pendimethalin 25%

Sodium lignosulfonate 4%

2 percent of carboxymethyl cellulose

Kaolin is complemented to 100%

The active ingredient is mixed with the auxiliaries and milled, the mixture being moistened with water. The mixture was extruded and then dried in a stream of air to give extruded granules of 5% halosulfuron-methyl +25% pendimethalin.

Example 141% halosulfuron-methyl +5% pendimethalin seed coating

1 percent of halosulfuron-methyl

Pendimethalin 5%

10 percent of fatty alcohol-polyoxyethylene ether disodium sulfosuccinate monoester

5 percent of modified calcium lignosulfonate

Xanthan gum 1%

1 percent of bentonite

Glycerol 5%

PVP-K30 1%

The water is complemented to 100 percent

The components are uniformly mixed according to the proportion and are subjected to sanding to prepare the seed coating agent of 1 percent of halosulfuron-methyl and 5 percent of pendimethalin.

Example 155% halosulfuron-methyl +30% pendimethalin microcapsule suspension-suspension

Synperonic PE/64 5%

0.05 percent of citric acid

0.1 percent of catalyst

10 percent of water

30 percent of pendimethalin

PAPI 1.35%

SOLVESSOTM100 5%

SynperonicPE/64 10%

0.15 percent of dispersant LFH

0.16 percent of defoaming agent

5.5 percent of urea

Halosulfuron-methyl 5%

The water is complemented to 100 percent

Mixing PAPI, pendimethalin, and SOLVESSO^TM100 into an aqueous solution containing Synperonic PE/64 to form an emulsion. Then the catalyst is added and reacted for 2 hours at 50 ℃ while heating and maintaining the temperature. Cooling to obtain the pendimethalin microcapsule.

Synperonic PE/64, a dispersant LFH, a defoaming agent, urea, halosulfuron-methyl and water are uniformly mixed in proportion and are prepared into a suspending agent by sanding.

And adding the obtained pendimethalin microcapsule into a suspending agent of halosulfuron-methyl, and uniformly stirring to obtain a microcapsule suspension-suspending agent of 5% halosulfuron-methyl and 30% pendimethalin.

Example 165% halosulfuron-methyl +25% pendimethalin suspoemulsion

Halosulfuron-methyl 5%

Pendimethalin 25%

SOLVESSO^TM200 10%

Ethoxylated castor oil 4%

Nonylphenol polyoxyethylene ether phosphate 5%

5 percent of modified calcium lignosulfonate

Xanthan gum 1%

1 percent of bentonite

Glycerol 5%

The water is complemented to 100 percent

Dissolving pendimethalin in SOLVESSO^TM200, adding ethoxylated castor oil to obtain pendimethalin missible oil.

Uniformly mixing the above components in proportion, and sanding to prepare the suspending agent.

And adding the oil phase containing the pendimethalin into the suspending agent containing the halosulfuron-methyl to obtain the suspending emulsion containing 5 percent of halosulfuron-methyl and 25 percent of pendimethalin.

Example 171% halosulfuron-methyl +50% pendimethalin emulsifiable concentrate

1 percent of halosulfuron-methyl

50 percent of pendimethalin

Ethoxylated castor oil 5%

Calcium dodecyl benzene sulfonate 3%

SOLVESSO^TM200 to 100%

The components are mixed and stirred until a transparent uniform phase is obtained, and missible oil of 1 percent of halosulfuron-methyl and 50 percent of pendimethalin is obtained.

Example 185% halosulfuron-methyl +15% pendimethalin oil suspension

Halosulfuron-methyl 5%

Pendimethalin 15%

Sodium p-methoxylipoamide benzenesulfonate 10%

Sorbitan fatty acid ester 5%

1 percent of bentonite

The methyl oleate is complemented to 100 percent

The active component, the dispersant, the wetting agent, the methyl oleate and other components are uniformly mixed according to the proportion of the formula, and the oil suspending agent of 5 percent halosulfuron-methyl and 15 percent pendimethalin is obtained after grinding and/or high-speed shearing.

Example 1920% halosulfuron-methyl +80% pendimethalin

Halosulfuron-methyl 20%

Pendimethalin 80%

Uniformly mixing the halosulfuron-methyl and the pendimethalin according to a proportion.

Example 2010% halosulfuron-methyl +50% pendimethalin +40% isoxadifen

10 percent of halosulfuron-methyl

50 percent of pendimethalin

40 percent of bisbenzoxazole acid

Uniformly mixing the halosulfuron-methyl, the pendimethalin and the isoxadifen according to a proportion.

Example 2110% halosulfuron-methyl +90% pendimethalin

10 percent of halosulfuron-methyl

Pendimethalin 90%

Uniformly mixing the halosulfuron-methyl and the pendimethalin according to a proportion.

Example 2215% halosulfuron-methyl +50% pendimethalin +35% cloquintocet-mexyl

Halosulfuron-methyl 15%

50 percent of pendimethalin

35 percent of cloquintocet-mexyl

Uniformly mixing the halosulfuron-methyl, the pendimethalin and the cloquintocet-mexyl according to a proportion.

The proportion of the above embodiment is weight percentage.

The following examples illustrate the invention

Evaluation of postemergence herbicidal Activity of herbicidal composition in greenhouse

Seeds of the desired test plant species were planted in seedling pots under greenhouse conditions. Standard soil was used as the cultivation substrate. When the plants reached the third to fourth true leaf stage, the herbicide was treated on the leaves alone or in combination. Each treatment was repeated 4 times.

Preparing a reagent according to a certain weight percentage: 1. halosulfuron-methyl; 2. pendimethalin; 3. halosulfuron-methyl + pendimethalin; . Then, each of the reagents was diluted with water to obtain a diluted drug solution.

The investigation method comprises the following steps:

after the test treatment for 21d, the target damage symptoms and growth inhibition condition are visually observed, the fresh weight of the overground part is weighed, and the fresh weight inhibition rate (%) is calculated.

The evaluation of the synergistic effect shown in the mixed application of two or more herbicidal active ingredients was determined on the basis of the Colby's method described in "synergistic synergy and antibiotic Response of herbicidal Combinations" (Weeds 15/1(1967), s.r. Colby).

In the formula, X is the fresh weight inhibition rate of halosulfuron-methyl to target weeds when a certain dosage is used singly.

Y is the fresh weight inhibition rate of pendimethalin to the target weeds when a certain dosage is used singly.

E₀Is a theoretical value of the inhibition rate of the halosulfuron-methyl and pendimethalin on the fresh weight of the target weeds when being mixed.

And E is the measured value of the inhibition rate of the fresh weight of the target weeds when the halosulfuron-methyl and the pendimethalin are mixed.

If observed in a biological testThe observed actual weed control rate (E) exceeded the expected value calculated using the Colby's method (E)₀) It means that the efficacy of the herbicidal composition is greater than the sum of the efficacies of the ingredients, which means that the composition has a synergistic effect.

TABLE 1 synergistic Activity of herbicidal compositions of halosulfuron-methyl + pendimethalin on barnyard grass (21 days after application) in greenhouses

TABLE 2 synergistic Activity of the herbicidal compositions halosulfuron-methyl + pendimethalin on Cyperus difformis L (21 days after application) in greenhouses

TABLE 3 synergistic Activity of herbicidal compositions halosulfuron-methyl + pendimethalin on Chinese Euphorbia (21 days after application) in greenhouses

The data in tables 1, 2, and 3 demonstrate that the herbicides of the halosulfuron-methyl + pendimethalin combination exhibit synergistic efficacy in weed control.

Claims (22)

1. The weeding composition is characterized in that active components of the weeding composition consist of halosulfuron-methyl and pendimethalin, and the weight ratio of the halosulfuron-methyl to the pendimethalin is 10:1-1: 100.

2. A herbicidal composition according to claim 1, wherein the weight ratio of halosulfuron-methyl to pendimethalin is 10:1 to 1: 50.

3. A herbicidal composition according to claim 1, wherein the weight ratio of halosulfuron-methyl to pendimethalin is 10:1 to 1: 25.

4. A herbicidal composition according to claim 1, wherein the weight ratio of halosulfuron-methyl to pendimethalin is 10:1 to 1: 10.

5. A herbicidal composition according to claim 1, wherein the weight ratio of halosulfuron-methyl to pendimethalin is from 5:1 to 1: 10.

6. A herbicidal composition according to claim 1, wherein the weight ratio of halosulfuron-methyl to pendimethalin is from 1:1 to 1: 10.

7. A herbicidal composition according to claim 1, wherein the weight ratio of halosulfuron-methyl to pendimethalin is from 1:1 to 1: 5.

8. A herbicidal composition according to claim 1, characterized in that it further comprises a filler and/or a surfactant.

9. A herbicidal composition according to claim 1, wherein the herbicidal composition is in the form of wettable powder, emulsifiable concentrate, suspension, microcapsules, microemulsion, emulsion in water, suspoemulsion, water dispersible granules, microcapsule suspension-suspension, ultra-low volume liquid, tablets, microcapsule granules.

10. A herbicidal composition according to claim 1, wherein the total amount of halosulfuron-methyl and pendimethalin is from 5% to 90% by weight of the herbicidal composition.

11. A herbicidal composition according to claim 1, wherein the total amount of halosulfuron-methyl and pendimethalin is from 10% to 80% by weight of the herbicidal composition.

12. A herbicidal composition according to claim 1, wherein the total amount of halosulfuron-methyl and pendimethalin is from 20% to 60% by weight of the herbicidal composition.

13. The weeding composition according to claim 1, further comprising a safener, wherein the safener is at least one of brassinolide, benoxacor, fenclorim, dichlormid, mefenpyr-diethyl or isoxadifen-ethyl, and the weight ratio of the safener to halosulfuron-methyl and pendimethalin is 1:100-20: 1.

14. Use of the herbicidal composition according to claim 1 for controlling undesirable vegetation.

15. Use of the herbicidal composition according to claim 1 for controlling undesired vegetation in broadleaf, sedge or grass weeds.

16. Use of the herbicidal composition according to claim 1 for controlling undesired vegetation in barnyard grass (Echinochloacus-galli; ECHCG), Leptochloa (Leptochloacchinesis; LEFCH), and Cyperus difformis (Cyperus difformis L).

17. Use of the herbicidal composition according to claim 1 for controlling undesired vegetation of broadleaf, sedge or grass weeds in wheat, maize, soybean, sugar beet, sugarcane, cotton, rice, beans, flax, barley, oats, rye, triticale, oilseed rape, potato, millet, pasture grasses, greens or lawns, in fruit plantations or in non-crop areas.

18. A method for controlling undesired vegetation, characterized in that the method comprises: (i) prior to the undesired plant germination; (ii) after the undesired plant has germinated; or (iii) applying the herbicidal composition of claim 1 to undesired plants or a growing locus thereof at the time of (i) and (ii).

19. A method for controlling undesired vegetation, characterized in that halosulfuron-methyl and pendimethalin, which are active ingredients of the herbicidal composition according to claim 1, are applied to undesired plants or their habitat together or separately.

20. A method of controlling undesired vegetation, characterized in that the herbicidal composition according to claim 1 is applied in the presence of the plants of the useful crops, the seeds of the useful crops or other propagating parts of the useful crops.

21. The method as claimed in claim 20, characterized in that the herbicidal composition as claimed in claim 1 is applied directly to the plants or to the locus of the plants before sowing or germination of the useful crops or after sowing and before germination.

22. A method for controlling undesired vegetation, which comprises contacting undesired plants or their growing sites with a herbicidally effective amount of the herbicidal composition as claimed in claim 1 or applying a herbicidally effective amount of the herbicidal composition as claimed in claim 1 to soil or water to prevent germination or growth of undesired plants.