JP5719643B2 - Plant fungal disease control agent and fungal disease control method - Google Patents

Description

The present invention relates to a fungal disease control agent and a fungal disease control method for plants.
More specifically, the present invention relates to a fungal disease control agent for plants having a high control effect on various plant diseases caused by fungi, which contains a monosaccharide as an active ingredient, and a method for controlling fungal diseases.

  In agricultural production, plant disease control agents, that is, agricultural chemicals, are used for the purpose of labor control of agricultural work and stabilization of the quality and yield of agricultural products for the purpose of pest control such as insecticides and fungicides. It is indispensable for current agriculture to secure safe and secure agricultural products. Conventionally, among many plant disease control agents, a large number of drugs having the same activity are frequently and sometimes excessively used for a specific plant disease control target, so that the target plant pathogen has its activity. The phenomenon of resistance to pesticides has become prominent.

  On the other hand, recently, consumer interest in reduced agricultural crops and social interest in reducing the environmental impact of synthetic chemical plant disease control agents are also increasing. Under such circumstances, it has less environmental impact than conventional synthetic chemical plant disease control agents, has a broad spectrum for various diseases, and is resistant to resistant bacteria that are no longer effective for existing disease control agents. Therefore, a plant disease control agent and a plant disease control method that are highly effective are desired.

Pathogens that cause diseases in plants mainly include fungi, bacteria, viruses, etc. About 80% of plant diseases are diseases caused by fungi. Examples of pathogenic fungi that cause fungal diseases include baby fungi, basidiomycetes, flagella fungi, zygomycetes, oomycetes, and incomplete fungi. For example, Pyricularia oryzae, ascomycetes fungi such as powdery mildew, rust, smuts, etc. sheath blight fungi Basidiomycetes, clubroot is flagellated fungus, Rhizopus (Rhizopus) bacteria Zygomycetes, Phytophthora The downy mildew fungus, Pythium spp. Belong to the oomycete, and Alternaria spp. Belong to the incomplete fungus. In general, since many diseases caused by fungi are included and many diseases that are difficult to control are included, new fungal disease control agents and fungal disease control methods for plants are desired.

  As plant disease control agents against fungal diseases, ergosterol synthesis inhibitors such as tebuconazole, prothioconazole and cimeconazole, respiratory inhibitors such as azoxystrobin, pyraclostrobin, boscalid, penthiopyrad, cyazofamide and fluazinam, thiophanate methyl, benomyl, Cell division inhibitors such as fluopicolide, pencyclon, and zoxamide, nucleic acid synthesis inhibitors such as metalaxyl, benalaxyl, and himexazole, amino acid and protein synthesis inhibitors such as cyprodinil and mepanipyrim, signal transduction inhibitors such as fludioxonil and iprodione, propamocarb, iprovaricarb, Lipid membrane synthesis inhibitors such as mandipipropamide, glucan synthesis inhibitors such as validamycin and polyoxin B, furaside, potassium Melamine synthesis inhibitors such as propamide and pyroxylone, resistance inducers such as probenazole, acibenzoral-S-methyl, isothianyl, copper agents such as cupric hydroxide, basic copper chloride, basic copper sulfate, captan, manzeb, It is controlled by protective agents such as dithianon and iminotadine albesylate. Many plant disease control agents that can control fungal diseases have been developed, but most of the same family of compounds have the same effect, and even if you try to build a control system by combining plant disease control agents with different activities However, there are few options. On the other hand, for biological pesticides that are said to have a low environmental impact, the treatment method, treatment time, etc. cannot be used in the same way as the above-mentioned plant disease control agents, and the effects are often insufficient, and the target diseases are also limited. The scenes that can be used are limited. Therefore, the present condition is that there are very few plant disease control agents with respect to a fungal disease which have little environmental impact and show sufficient effect.

  Monosaccharides include D and L-aldose as glucose, mannose, allose, altrose, talose, galactose, idose, growth, ribose, lyxose, xylose, arabinose, erythrose, threose, glyceraldehyde, D and L-ketose As fructose, psicose, tagatose, sorbose, xylulose, ribulose, eltrulose, dihydroxyacetone, D and L-polytol, as glucitol, mannitol, altritol, iditol, arabitol, threitol, poritol as allitol, galactitol, xylitol, Ribitol, erythritol, glycerin, inositol, quercitol are listed, but their effects as disease control agents have been clarified. The is the only D- tagatose. As a plant disease control agent for fungal diseases, D-tagatose has been shown to exhibit a high control effect especially against downy mildew, powdery mildew, rust disease and diseases caused by Psium (Patent Document 1). On the other hand, although it has been clarified that D-allose induces resistance to rice leaf blight, which is one of bacterial diseases, the effect on fungal diseases has not been clarified (Non-patent Document 1). . However, the control effects of other monosaccharides on fungal diseases, the effects on other fungal diseases, and their practicality have been unknown.

PCT / JP2009 / 003925 (WO2010 / 021121)

Journal of the Japanese Society for Plant Pathology 2009 Vol. 75, No. 3, 261-262.

  In recent years, some of the existing plant disease control agents are those that are not effective against fungal diseases, or those whose use is restricted due to environmental impact, There are some that have become problematic due to the occurrence of resistant bacteria due to frequent use. Therefore, it is desired to develop a novel and naturally occurring plant disease control agent that is considered to have an action different from that of existing plant disease control agents and is considered to have a low environmental load. The present invention has been made under the technical background as described above, has a high control effect against various diseases caused by fungi, and has a low environmental burden compared to conventional plant disease control agents. An object is to provide an agent and a method for controlling plant diseases.

The present inventors have found that monosaccharides, particularly D-talose, L-fructose, D-allose, D-psicose, D-galactose, and the like exhibit a high control effect against plant diseases caused by various fungi. It came to complete.
The present invention relates to the plant disease control agent described in (Invention 1) and (Invention 2) below.
(Invention 1) A fungal disease control agent for a plant comprising a monosaccharide selected from the group consisting of D-talose, L-fructose, D-allose, D-psicose, and D-galactose as an active ingredient.
(Invention 2) The fungal disease control agent for a plant according to Invention 1, wherein the fungal disease is a disease caused by a fungus selected from the group consisting of a baby fungus, a basidiomycete, a flagellate fungus, a zygomycete, an oomycete and an incomplete fungus .

The present invention also relates to a method for controlling fungal diseases of plants described in (Invention 3), (Invention 4 ) to (Invention 5 ) below.
(Invention 3 ) A method for controlling a fungal disease of a plant, which comprises applying the fungal disease control agent for a plant according to the invention 1 or 2 to a plant, soil and a hydroponic culture solution.
(Invention 4) application to plants, fungi disease control agent is contacted with plants or seeds or fungal disease control method of the plant according to the invention 3 is brought into contact with the roots or rhizomes of plants by containing cultivation soil, .
(Invention 5 ) When applied to soil or hydroponic culture solution, in the case of soil, treatment of the plant disease control agent on the soil surface, irrigation to the soil, or mixing with soil, and in the case of hydroponic culture solution, plant disease control The method for controlling fungal diseases of plants according to invention 3 , wherein the agent is diluted in a hydroponic culture solution.

  The present invention clarifies that monosaccharides can be used as a fungal disease control agent for plants. Monosaccharides can be used as foliar sprays, soil treatments, seed treatments, or hydroponic broth treatments, and are effective against various diseases caused by fungi including drug-resistant bacteria without causing phytotoxicity to plants. It is effective and has excellent effects as a foliage spray, a soil treatment, a seed treatment, or a hydroponic culture solution treatment. The present invention has found that a monosaccharide that has been unknown as a fungal disease control agent for plants so far can be used as a novel control agent for plant disease caused by fungi. In addition to providing an effective control method, the present invention provides an effective control method with less labor and less phytotoxicity.

The monosaccharides in the present invention are, as D and L-aldose, glucose, mannose, allose, altrose, talose, galactose, idose, gulose, ribose, lyxose, xylose, arabinose, erythrose, threose, glyceraldehyde, D and L-ketose as fructose, psicose, tagatose, sorbose, xylulose, ribulose, eltrulose, dihydroxyacetone, D and L-polytol as glucitol, mannitol, altritol, iditol, arabitol, threitol, as poritol, allitol, galactitol , Xylitol, ribitol, erythritol, glycerin, inositol, quercitol, and preferred monosaccharides include D- Loin, fructose L-, D- allose, D- psicose, and monosaccharides are exemplified selected from the group consisting of D- galactose, but is not limited thereto.
It is not limited to these.

  Monosaccharides are useful as plant disease control agents for fungal diseases in various agricultural and horticultural fields, as foliage sprays, soil treatment agents, seed treatment agents, or hydroponic culture solution treatment agents. For example, by treating as a foliage spray agent, a soil treatment agent, a seed treatment agent, or a hydroponic culture solution treatment agent, it exhibits an excellent control effect against soil-borne and seed-borne fungal diseases.

  The monosaccharide, which is a plant disease control agent for fungal diseases of the present invention, may be used as it is, but is usually used by mixing with a carrier, and if necessary, a surfactant, a wetting agent, a sticking agent, an increase agent. Add formulation adjuvants such as sticking agents, preservatives, colorants, stabilizers, etc., and formulate them in a timely manner by generally known methods such as wettable powders, flowable powders, granular wettable powders, powders, and emulsions. Used. It can also be applied by the so-called ultra-high concentration and small quantity spraying method. In this method, it is possible to contain 100% of the active ingredient.

  Carriers used in the formulation include, for example, animal and vegetable powders such as starch, activated carbon, soybean flour, wheat flour, wood flour, fish flour, milk powder, and talc, kaolin, bentonite, calcium carbonate, zeolite, diatomaceous earth, white carbon, Solid carriers such as mineral powders such as clay and alumina; or water, alcohols such as ethanol, isopropyl alcohol and ethylene glycol, ketones such as cyclohexane and methyl ethyl ketone, ethers such as dioxane and tetrahydrofuran, kerosene, light oil, etc. Aliphatic hydrocarbons, aromatic hydrocarbons such as xylene, trimethylbenzene, tetramethylbenzenemethylnaphthalene, solvent naphtha, halogenated hydrocarbons such as chlorobenzene, acid amides such as dimethylacetamide, fatty acid glycerin ester Esters etc., can be a liquid carrier such as nitriles and dimethylsulfoxide sulfur-containing compounds such as de as acetonitrile, preferably a solid carrier or liquid carrier.

  Furthermore, in order to enhance the efficacy of the monosaccharide that is a plant disease control agent for the fungal disease of the present invention, each of them may be used alone or in combination depending on the purpose in consideration of the dosage form, treatment method, etc. Can also be used. Surfactants that are usually used as auxiliary agents for the purpose of emulsifying, dispersing, spreading, and wetting in agricultural chemical formulations include, for example, alkylbenzene sulfonic acid metal salts, dinaphthylmethane disulfonic acid metal salts, alcohol sulfate esters, alkyls. It can be an aryl sulfonate, lignin sulfonate, polyoxyethylene glycol ether, polyoxyethylene alkyl aryl ether or polyoxyethylene sorbitan monoalkylate, preferably an alkylbenzene sulfonic acid metal salt, lignin sulfonate, polyoxyethylene Although it is oxyethylene alkyl aryl ether or polyoxyethylene sorbitan monoalkylate, it is not limited to these.

  Other adjuvants include, for example, fixing agents or thickeners such as carboxydimethylcellulose, gum arabic, sodium alginate, xanthan gum, guar gum, tragacanth gum and polyvinyl alcohol; metal soaps and antifoaming agents for silicone compounds; or fatty acids , Alkyl phosphates, silicones, paraffins, and other physical property improvers, and are preferably guar gum or xanthan gum. Examples of the stabilizer include hindered phenol-based antioxidants, benzotriazole-based, hindered amine-based ultraviolet absorbers, and the like. Use phosphoric acid, acetic acid, sodium hydroxide as a pH adjuster, or add industrial disinfectants such as 1,2-benzisothiazolin-3-one, antibacterial and antifungal agents, etc. You can also. A silicone compound as an antifoaming agent and propylene glycol, ethylene glycol or the like as an antifreezing agent may be used as necessary. However, these components are not limited to those exemplified above.

  As a method for applying the plant disease control agent for the fungal disease of the present invention, the foliage spray treatment, seedling box treatment, spray treatment to the soil surface, soil mixing after the spray treatment to the soil surface, Injection treatment, soil mixing after injection treatment in soil, soil irrigation treatment, soil mixing after soil irrigation treatment, mixing in hydroponic culture solution, spraying treatment on plant seed, smearing treatment on plant seed, plant Examples of the method include soaking in seeds and dressing on plant seeds, and any method of application usually used by those skilled in the art will exhibit sufficient efficacy.

  The application rate and concentration of monosaccharides, which are plant disease control agents for fungal diseases of the present invention, vary depending on the target crop, target disease, degree of disease occurrence, compound dosage form, application method and various environmental conditions, etc. In the case of irrigation, the amount of active ingredient is suitably 50 to 1,000,000 g per hectare, and preferably 100 to 500,000 g per hectare. The amount used for seed treatment is 0.001 to 50 g, preferably 0.01 to 10 g, per 1 kg of seed. In the case of mixing a monosaccharide, which is a plant disease control agent for fungal diseases of the present invention, into a plant individual, a foliage spray treatment, a soil surface spray treatment, a soil injection treatment, a soil irrigation treatment, and a hydroponic culture solution The treatment may be carried out after diluting to a suitable concentration in a suitable carrier. When the monosaccharide which is a plant disease control agent for the fungal disease of the present invention is brought into contact with the plant seed, the plant seed may be immersed in an aqueous solution of the monosaccharide as it is. Moreover, after diluting the monosaccharide which is a plant disease control agent with respect to the fungal disease to be used to a suitable density | concentration to a suitable density | concentration, you may use it by immersing, dressing, spraying, and smearing a plant seed. In the case of powder coating, spraying and smearing treatment, the amount of the preparation used is usually about 0.05 to 50%, more preferably 0.1 to 30% of the dry plant seed weight. The amount is not limited to these ranges, and may vary depending on the form of the preparation and the type of plant seed to be treated. Suitable carriers include liquid carriers of organic solvents such as water or ethanol, inorganic substances such as bentonite, montmorillonite, kaolinite, diatomaceous earth, white clay, talc, clay, vermiculite, gypsum, calcium carbonate, amorphous silica, ammonium sulfate, Examples thereof include, but are not particularly limited to, plant organic substances such as soybean flour, wood flour, sawdust, wheat flour, lactose, sucrose, and glucose, and solid carriers such as urea.

  In the present invention, the plant body means all agricultural and horticultural crops conventionally cultivated, and examples thereof include vegetables, fruit trees, flower buds and ornamental plants. Specifically, rice, wheat, barley, corn, grape, apple, pear, peach, sweet potato, oyster, citrus, soybean, green beans, strawberry, potato, cabbage, lettuce, tomato, cucumber, eggplant, watermelon, sugar beet, spinach Agricultural and horticultural crops such as, but not limited to, pea, pea, pumpkin, sugar cane, tobacco, pepper, sweet potato, taro, konjac, cotton, sunflower, tulip, chrysanthemum, and turf. The plant body includes a plant individual, all types and forms of cells that can constitute the plant individual, tissues and organs that are part of a plant solid, and germ cells. Furthermore, as a part of a plant individual, its propagation medium (stem, leaf, root, seed, flower, fruit, cut ear, etc.) is also included. In addition, although a plant body contains a seed, since the form of a seed has a market (transaction route) different from a plant individual | organism | solid, it may distinguish and describe a plant body and a seed.

  In the present invention, seeds refer to seeds that store nutrients for germination of young plants and are used for agricultural propagation. Specifically, seeds such as corn, soybean, cotton, rice, sugar beet, wheat, barley, sunflower, tomato, cucumber, eggplant, spinach, sweet pea, pumpkin, sugar cane, tobacco, pepper and rape, taro, potato, sweet potato, Genetically modified crops that are produced by artificially manipulating genes such as seed seeds such as konjac, edible lily, bulbs such as tulips and seed balls such as raccoon, etc. Examples include soybean, corn, cotton, etc. that have been given herbicide resistance, rice, tobacco, etc., that have been adapted to cold regions, corn, cotton, etc., that have been given the ability to produce insecticides, but potato tubers is not.

  The monosaccharide which is a plant disease control agent for the fungal disease of the present invention may contain other agricultural chemicals such as bactericides, insecticides, acaricides, nematicides, herbicides and plant growth regulators as necessary. It can be mixed with or used in combination with agricultural chemicals, soil conditioners or fertilizers.

In the present invention, fungal disease refers to a disease caused by fungal (mold) infestation in a higher plant (plant).
In the present invention, a bacterial disease refers to a disease (bacterial plant disease) that occurs when a plant (plant) is infected with bacteria. The fungal disease control agent of the plant which uses the monosaccharide of this invention as an active ingredient, and the control method using the monosaccharide which is a fungal disease control agent of a plant are effective with respect to the following kinds of fungal diseases. Specific diseases and pathogenic fungi caused by ascomycetous fungi, basidiomycetes, flagella fungi, zygomycetes, oomycetes and incomplete fungi are shown below, but are not limited thereto.
Rice blast ( Pyricularia oryze ), blight ( Thanatephorus cucumeris ), sesame leaf blight ( Cochliobolus miyabeanus ), stink bug ( Gibberella fujikurol ), seedling blight ( Pythium spp., Fusarium spp., Trichoderma spp. Rhizopus spp., Rhizoctonia solani, etc.), rice rot ( Claviceps virens ), smut ( Tilletia barclayana ), yellowing dwarf ( Sclerophthora macrospora );

Wheat powdery mildew (Erysiphe graminis f.sp. hordei; f.sp. tritici ), rusts (Puccinia striiformis; Puccinia graminis, Puccinia recondita, Puccinia hordei), Madarahabyo (Pyrenophora graminea), net blotch ( Pyrenophora teres), Fusarium head blight (Fusarium graminearum, Fusarium culmorum, Fusarium avenaceum, Microdochium nivale), snow mold (Typhula incarnata, Typhula ishikariensis, Micronectriella nivalis), loose smut (Ustilago nuda, Ustilago tritici, Ustilago nigra, Ustilago avenae ), fishy smell smut (Tilletia caries, Tilletia pancicii), Memonbyo (Pseudocercosporella herpotrichoides), stock rot (Rhizoctonia cerealis), scald (Rhynchosporium secalis), leaf blight (Septoria tritici), glume blotch (Leptosphaeria nodorum ), Seedling blight ( Fusarium spp., Pythium spp., Rhizoctonia spp., Septoria nodorum , Pyrenophora spp.), Blight ( Gaeumannomyces graminis) ), Anthrax ( Colletotrichum graminicola ), ergot ( Claviceps purpure a), spot disease ( Cochliobolus sativus );

Corn mold blight ( Fusarium graminearum, etc.), seedling blight ( Fusarium avenaceum , Penicillium spp., Pythium spp., Rhizoctonia spp.), Rust ( Puccinia sorghi ), sesame leaf blight ( Cochliobolus heterostrophus ), scab ( Ustilago maydis), anthracnose (Colletotrichum graminicola), northern leaf spot (Cochliobolus carbonum); grape downy mildew (Plasmopara viticola), rust (Phakopsora ampelopsidis), powdery mildew (Uncinula necator), sphaceloma disease (Elsinoe ampelina ), Late rot ( Glomerella cingulata ), black rot ( Guignardia bidwellii ), vine split disease ( Phomopsis viticola ), soot spot disease ( Zygophiala jamaicensis ), gray mold disease ( Botrytis cinerea ), bud blight ( Diaporthe medusaea ), Purple coat feather ( Helicobasidium mompa ), white coat feather ( Rosellinia necatrix );

Apple powdery mildew ( Podosphaera leucotricha ), black spot disease ( Venturia inaequalis ), spotted leaf disease ( Alternaria mali ), red star disease ( Gymnosporangium yamadae ), monirinia disease ( Monilinia mali ), rot disease ( Valsa ceratosperma ), ring disease Botryosphaeria berengeriana), anthracnose (Colletotrichum acutatum), soot spot disease (Zygophiala jamaicensis), soot Madarabyo (Gloeodes pomigena), black spot disease (Mycosphaerella pomi), Murasakimon rot (Helicobasidium mompa), Shiromon rot (Rosellinia necatrix ), blight (Phomopsis mali, Diaporthe tanakae), brown spot disease (Diplocarpon mali); pear black spot disease (Alternaria kikuchiana), scab (Venturia nashicola), gymnosporangium (gymnosporangium haraeanum), early blight (Physalospora piricola), blight (Diaporthe medusaea, Diaporthe eres), pears of late blight (Phytophthora cactorum); peach scab (Cladosporium carpophilum), (. Phomopsis sp) (. Phytophthora sp) Omopushisu rot, late blight, anthracnose (Gloeosporium laeticolor), Chijimihabyo (Taphrina deformans); Cherry anthracnose (Glomerella cingulata), Yohatekinkakubyo (Monilinia kusanoi), Haihoshibyo (Monilinia fructicola); oysters of anthrax (Gloeosporium kaki), deciduous disease (Cercospora kaki; Mycosphaerella nawae), powdery mildew (Phyllactinia kakikora); citrus black spot disease (Diaporthe citri), green mold disease (Penicillium digitatum ), Blue mold ( Penicillium italicum ), common scab ( Elsinoe fawcettii ), brown rot ( Phytophthora citrophthora );

Gray mold ( Botrytis cinerea ) such as tomato, cucumber, beans, strawberry, potato, cabbage, eggplant, lettuce; Sclerotinia sclerotiorum such as tomato, cucumber, legume, strawberry, potato, rapeseed, cabbage, eggplant, lettuce ); Seedling blight of various vegetables such as tomato, cucumber, beans, radish, watermelon, eggplant, rapeseed, green pepper, spinach, sugar beet ( Rhizoctonia spp., Pythium spp., Fusarium spp., Phythophthora spp., Sclerotinia sclerotiorum, etc.) ; cucurbits of downy mildew (Pseudoperonospora cubensis), powdery mildew (Sphaerotheca fuliginea), anthracnose (Colletotrichum lagenarium), vine blight (Mycosphaerella melonis), Fusarium disease (Fusarium oxysporum), plague (Phytophthora parasitica, Phytophthora melonis , Phytophthora nicotianae, Phytophthora drechsleri, Phytophthora capsici , etc.); tomato early blight (Alternar ia solani ), leaf mold ( Cladosporium fulvum ), plague ( Phytophthora infestans ), wilt ( Fusarium o xysporum ), root rot ( Pythium myriotylum , Pythium dissotocum ), anthracnose ( Colletotrichum phomoides ) Sphaerotheca fuliginea etc.), mildew ( Mycovellosiella nattrassii ), plague ( Phytophthora infestans ), brown rot ( Phytophthora capsici );

Rapeseed black spot ( Alternaria brassicae ), cruciferous vegetable black spot ( Alternaria brassicae etc.), white spot ( Cercosporella brassicae ), root rot ( Leptosphaeria maculans ), root- knot ( Plasmodiophora brassicae ), mildew ( Peronospora brassicae); cabbage strain rot (Rhizoctonia solani), yellows disease (Fusarium oxysporum); Chinese cabbage ass rot (Rhizoctonia solani), Kikabyo (Verticillium dahliae); leek rust (Puccinia allii), black spots Disease ( Alternaria porri ), white silkworm ( Sclerotium rolfsii ), white plague ( Phytophthora porri ); soybean purpura ( Cercospora kikuchii ), black mildew ( Elsinoe glycines ), black spot ( Diaporthe phaseololum ), rhizothonia root rot ( Rhizoctonia solani ), stem blight ( Phytophthora megasperma ), downy mildew ( Peronospora manshurica ), rust ( Phakopsora pachyrhizi ), anthrax ( Colletotrichum truncatum );

Common bean anthracnose ( Colletotrichum lindemuthianum ); groundnut black astringency ( Mycosphaerella personatum ), brown spot ( Cercospora arachidicola ); pea powdery mildew ( Erysiphe pisi ), downy mildew ( Peronospora pisi ); (Peronospora viciae), late blight (Phytophthora nicotianae); early blight of potatoes (Alternaria solani), black bruises disease (Rhizoctonia solani), late blight (Phytophthora infestans), silver or disease (Spondylocladium atrovirens), dry rot (Fusarium oxysporum, Fusarium solani ), powdery scab ( Spongospora subterranea ); sugar beet brown spot ( Cercospora beticola ), downy mildew ( Peronospora schachtii ), black root disease ( Aphanomyces cochioides ), jumpy throat ( Phoma betae );

Carrot black leaf blight ( Alternaria dauci ); Strawberry powdery mildew ( Sphaerotheca humuli ), plague ( Phytophthora nicotianae ), anthrax ( Glomerella cingulata ), fruit rot ( Pythium ultimum ); Cha net rot ( Exobasidium reticulatum) ), win disease (Elsinoe leucospila), anthracnose (Colletotrichum theae-sinensis), early blight (Pestalotiopsis longiseta); tobacco gymnosporangium (Alternaria alternata), powdery mildew (Erysiphe cichoracearum), anthracnose (Colletotrichum tabacum), Phytophthora parasitica ; Cotton wilt ( Fusarium oxysporum ); Sunflower sclerotia ( Sclerotinia sclerotiorum ); Rose black spot ( Diplocarpon rosae ), powdery mildew ( Sphaerotheca pannosa ), plague ( Phytophthora megasper And disease ( Peronospora sparsa ); chrysanthemum brown spot ( Septoria chrysanthemi-indici ), white rust ( Puccinia horiana ), plague ( Phytophthora cacto ) rum ); brown patch disease ( Rhizoctonia solani ), dollar spot disease ( Sclerotinia homoeocarpa ), curvularia leaf blight ( Curvularia geniculata ), rust disease ( Puccinia zoysiae ), hermint sporium leaf blight ( Cochliobolus sp.), Cloud shape disease ( Rhynchosporium secalis ), withering disease ( Gaeumannomyces graminis ), anthrax ( Colletotrichum graminicola ), snow rot brown sclerotia nuclei ( Typhula incarnata ), snow rot black sclerotia nuclei ( Typhula ishikariensis ), snow rot Nuclear diseases ( Sclerotinia borealis ), fairy ring diseases ( Marasmius oreades, etc.), pisium diseases ( Pythium aphanidermatum, etc.), blasts ( Pyricularia oryzae ).

  Details of the present invention will be described in the examples. The present invention is not limited by these examples.

In this example, a rice blast control test was conducted.
After sowing the test plant (rice cultivar: Kofu), it was cultivated until three real leaves were developed. In the test, a diluted solution (10 ml) diluted with distilled water was sprayed so that D-talose, D-allose, and D-psicose had predetermined concentrations. The seedlings 3 days after spraying were spray-inoculated with 1 × 10 ⁵ conidia of rice blast fungus (Pyricularia oryze) and then left in an inoculation room at 20-23 ° C. for about 18 hours. Urged. The degree of disease on the 10th day after inoculation was investigated and the effect was evaluated.
In the test, the disease severity was evaluated for 10 seedlings in 1 ward. In addition, the test was performed by 2 continuous systems and the control value was computed from the disease severity.
[Disease severity]
0: No disease occurrence 1: Disease area is less than 40% of untreated area 2: Disease area is 40% or more to less than 80% of untreated area 3: Disease area is 80% or more of untreated area [Control value]
Control value = 100 {1- (n / N)}
N = Severity of untreated section, n = Severity of each section

  As a result of this test, the control value of the D-talose spraying zone (50000, 10000, 5000 and 1000 ppm) was 96.7, 96.7, 96.7, 58.3, and that of the D-allose spraying zone (50000 and 10,000 ppm). The control value was 100 and 60, and the control value of the D-psicose spray area (50000 ppm) was 53.3.

In this example, a cucumber anthracnose control test was conducted.
After sowing the test plant (cucumber variety: Sagamihanjiro), it was cultivated until one true leaf developed. In the test, a diluted solution (10 ml) diluted with distilled water was sprayed so that D-talose, D-allose, D-psicose and L-fructose had a predetermined concentration. The seedlings 3 days after spraying are spray-inoculated with 1 × 10 ⁷ seeds / ml conidia of cucumber anthracnose fungus (Colletotrichum lagenarium), and then left in an inoculation room at room temperature of 20-23 ° C. for about 18 hours. Urged. The degree of disease on the 10th day after inoculation was investigated and the effect was evaluated.
The disease severity was evaluated for 8 seedlings in 1 ward. In addition, the test was performed by 2 continuous systems and the control value was computed from the disease severity. The onset degree and determination were performed in the same manner as in Example 1.

  As a result of this test, the control value of the D-talose spraying zone (50000 ppm) is 66.7, the control value of the D-allose spraying zone (50000 ppm) is 80.0, and the control value of the D-psicose spraying zone (50000 ppm) is 66. .7, the control value of L-fructose spraying zone (50000 ppm) was 83.3

In this example, a cabbage black soot disease control test was conducted.
After sowing the test plant (cabbage variety: seasonal harvest), it was cultivated until the cotyledon developed. In the test, a dilute solution (10 ml) diluted with distilled water so that D-talose, D-allose and L-fructose had a predetermined concentration was sprayed. The seedlings 3 days after spraying are spray-inoculated with conidia of 1 × 10 ⁷ cells / ml of cabbage black smut fungus ( Alternaria brassicicola ), then left in an inoculation room at room temperature of 20-23 ° C. for about 48 hours. Urged. The degree of illness 2 days after inoculation was investigated and the effect was evaluated.
The severity of the disease was evaluated for 2 seedlings in 1 ward. In addition, the test was performed by 2 continuous systems and the control value was computed from the disease severity. The onset degree and determination were performed in the same manner as in Example 1.

  As a result of this test, the control value of the D-talose spraying zone (50000, 10000 ppm) is 100, 60, the control value of the D-allose spraying zone (50000, 10000 ppm) is 73.3, 50, and the L-fructose spraying zone (50000). The control value of 10,000 ppm was 100 and 60.

In this example, a rice sesame leaf blight control test was conducted.
After sowing the test plant (rice cultivar: Kofu), it was cultivated until three real leaves were developed. In the test, a diluted solution (10 ml) diluted with distilled water so that D-talose had a predetermined concentration was sprayed. The seedlings 3 days after spraying were spray-inoculated with conidia of 1 × 10 ⁵ cells / ml of rice sesame leaf blight fungus ( Cochliobolus miyabeanus ), then left in an inoculation room with a room temperature of 20-23 ° C. for about 18 hours, The disease was promoted. The degree of illness 4 days after the inoculation was investigated and the effect was evaluated.
The disease severity was evaluated for 10 seedlings in 1 ward. In addition, the test was performed by 2 continuous systems and the control value was computed from the disease severity. The onset degree and determination were performed in the same manner as in Example 1.

  As a result of this test, the control value of the D-talose spraying zone (50000 ppm) was 50.

In this example, an apple black spot disease control test was conducted.
After sowing the test plant (apple variety: Wang Lin), the plant was cultivated until four true leaves developed. In the test, a diluted solution (10 ml) diluted with distilled water so that D-talose had a predetermined concentration was sprayed. The seedlings 3 days after spraying are spray-inoculated with conidia of 1 × 10 ⁵ cells / ml of apple scab ( Venturia inaequalis ), then left in an inoculation room with a room temperature of 20-23 ° C. for about 18 hours. Urged. The degree of disease on the 10th day after inoculation was investigated and the effect was evaluated.
The severity of the disease was evaluated for 2 seedlings in 1 ward. In addition, the test was performed by 2 continuous systems and the control value was computed from the disease severity. The onset degree and determination were performed in the same manner as in Example 1.

  As a result of this test, the control value of the D-talose spraying zone (50000 ppm) was 83.3.

In this example, a barley powdery mildew control test was conducted.
After sowing the test plant (barley variety: Akagami power), it was cultivated until one true leaf developed. In the test, a diluted solution (10 ml) diluted with distilled water was sprayed so that D-talose and D-psicose had a predetermined concentration. The seedlings 3 days after spraying were spray-inoculated with conidia of 1 × 10 ⁵ cells / ml of barley powdery mildew ( Erysiphe graminis f.sp. hordei ), and then the degree of disease was investigated 7 days later. evaluated.
The disease severity was evaluated for 10 seedlings in 1 ward. In addition, the test was performed by 2 continuous systems and the control value was computed from the disease severity. The onset degree and determination were performed in the same manner as in Example 1.

  As a result of this test, the control value of the D-talose spraying zone (50000, 10000 ppm) was 100, 96.7, and the control value of the D-psicose spraying zone (50000 ppm) was 66.7.

In this example, a cucumber powdery mildew control test was conducted.
After sowing the test plant (cucumber variety: Sagamihanjiro), it was cultivated until one true leaf developed. In the test, a diluted solution (10 ml) diluted with distilled water was sprayed so that D-talose, D-allose, and D-psicose had a predetermined concentration. The seedlings 3 days after the spraying were spray-inoculated with conidia of 1 × 10 ⁵ cells / ml of Sphaerotheca fuliginea , and the degree of disease on the 10th day was investigated to evaluate the effect.
The severity of the disease was evaluated for 2 seedlings in 1 ward. In addition, the test was performed by 2 continuous systems and the control value was computed from the disease severity. The onset degree and determination were performed in the same manner as in Example 1.

  As a result of this test, the control value of the D-talose spraying zone (50000, 10000 ppm) is 93.3, 50, the control value of the D-allose spraying zone (50000 ppm) is 83.3, and the control value of the D-psicose spraying zone (50000 ppm). The control value was 50.

In this example, a rice strip blight control test was conducted.
After sowing the test plant (rice cultivar: Kofu), it was cultivated until three real leaves were developed. In the test, a diluted solution (10 ml) diluted with distilled water so that D-galactose had a predetermined concentration was sprayed. Three days after spraying, seedlings were inoculated with oat seeds cultured with rice blight fungus ( Thanatephorus cucumeris ; Rhizoctonia solani AG-I), and then left in an inoculation room at room temperature of 28 ° C for about 48 hours to promote disease. . The degree of disease on the 10th day after inoculation was investigated and the effect was evaluated.
The disease severity was evaluated for 10 seedlings in 1 ward. In addition, the test was performed by 2 continuous systems and the control value was computed from the disease severity. The onset degree and determination were performed in the same manner as in Example 1.

  As a result of this test, the control value of the D-galactose spraying zone (50000 ppm) was 50.

In this example, a tomato plague control test was conducted.
After sowing the test plant (tomato variety: large Fushou), it was cultivated until 5 true leaves were developed. In the test, a diluted solution (10 ml) diluted with distilled water so that D-allose had a predetermined concentration was sprayed. Three days after spraying, the seedlings were spray-inoculated with 1 x 10 ³ / ml Phytophthora infestans zoosporangium suspension, then left in an inoculation room at 20 ° C for about 18 hours, The disease was promoted. The degree of disease on the 7th day after inoculation was investigated and the effect was evaluated.
The severity of the disease was evaluated for 1 seedling in 1 ward. In addition, the test was performed by 2 continuous systems and the control value was computed from the disease severity. The onset degree and determination were performed in the same manner as in Example 1.

  As a result of this test, the control value of the D-allose spraying zone (50000 ppm) was 50.

In this example, a cucumber downy mildew control test was conducted.
After sowing the test plant (cucumber variety: Sagamihanjiro), it was cultivated until one true leaf developed. In the test, a diluted solution (10 ml) diluted with distilled water so that D-allose had a predetermined concentration was sprayed. The seedlings 3 days after spraying were spray-inoculated with a zoospore suspension of 1 × 10 ³ / ml cucumber downy mildew ( Pseudoperonospora cubensis ) and then left in an inoculation room at 20 ° C. for about 18 hours. Urged the disease. The degree of disease on the 7th day after inoculation was investigated and the effect was evaluated.
The severity of the disease was evaluated for 1 seedling in 1 ward. In addition, the test was performed by 2 continuous systems and the control value was computed from the disease severity. The onset degree and determination were performed in the same manner as in Example 1.

  As a result of this test, the control values of the D-allose spraying zone (50000, 10000 ppm) were 86.7 and 66.7.

In this example, a cucumber seedling blight control test was conducted.
Contaminated soil was prepared by mixing 1 L of soil with hyphae (100 g) of Pythium aphanidermatum . In the test, a dilute solution (10 ml) diluted with distilled water so that D-allose, D-galactose and L-fructose had predetermined concentrations was sprayed. Five seeds of cucumber seeds (Sagamihanjiro) were sown in a 5 × 5 cm pot containing contaminated soil, covered with soil, and then 10 ml of diluted solution was irrigated. For 5 seedlings in 1 ward, the presence or absence of disease was investigated after 2 weeks, and the disease incidence was calculated. In addition, the test was conducted in two consecutive systems, and the control value was calculated from the disease incidence.

  As a result of this test, the control value of the D-allose treated group (50000, 10000 ppm) was 66.7, 90, the control value of the D-galactose treated group (50000 ppm) was 83.3, and the L-fructose treated group (50000, 10000 ppm). ) Were 83.3 and 66.7.

  The present invention clarifies that monosaccharides can be used as plant disease control agents against fungal diseases. Monosaccharides can be used as foliar spray, soil treatment, seed treatment, or hydroponic broth treatment, and can control plant diseases caused by various fungi without damaging the host plant It is.

Claims (5)

A fungal disease control agent for plants, comprising a monosaccharide selected from the group consisting of D-talose, L-fructose, D-allose, D-psicose, and D-galactose as an active ingredient.   2. The fungal disease control agent for a plant according to claim 1, wherein the fungal disease is a disease caused by a fungus selected from the group consisting of Ascomycota fungi, basidiomycetes, flagella fungi, zygomycetes, oomycetes and incomplete fungi. A method for controlling a fungal disease of a plant, comprising applying the fungal disease controlling agent for a plant according to claim 1 or 2 to a plant, soil and a hydroponic culture solution. The method for controlling a fungal disease of a plant according to claim 3 , wherein the application to the plant is performed by bringing the fungal disease control agent into contact with the plant body or seed, or by bringing the fungus disease into contact with the root or the underground stem of the plant by containing it in the cultivated soil. In the case of soil, the application to soil or hydroponic broth is treatment of the plant disease control agent on the soil surface, irrigation to the soil, or mixing with soil. The method for controlling fungal diseases of plants according to claim 3 , wherein the method is diluted in a culture solution.