TW201519785A - Composition for controlling plant diseases and method for controlling plant diseases - Google Patents

Abstract

Provided is a composition for controlling plant diseases containing ethaboxam and fluopicolide, a seed treating agent containing ethaboxam and fluopicolide, a plant seed attached an effective amount of ethaboxam and fluopicolide, and a method for controlling plant diseases by applying an effective amount of ethaboxam and fluopicolide to a plant or soil for cultivating a plant. Thus this invention can provide a composition for controlling plant diseases having excellent plant disease controlling activity and a method for controlling plant diseases.

Description

Plant disease control composition and plant disease prevention method

The present invention relates to a method for controlling a plant disease control composition and a plant disease.

Etoboxam (refer to, for example, Patent Document 1) and fluopicolide (refer to Patent Document 2) are known as active ingredients of plant disease control agents.

[Previous Technical Literature] Patent literature

[Patent Document 1] US Patent No. 5154643

[Patent Document 2] Patent Special Table 2002-503723

An object of the present invention is to provide a plant disease control composition having excellent plant disease control effect and a method for controlling plant diseases.

The inventor of the case, etc., in order to seek for prevention of excellent plant diseases In addition to the efficacy of the plant disease control composition, it was found that the composition of the plant disease control agent containing the ethaboxam and the fluorine ratio exerted excellent effects on plant diseases.

That is, the present invention is as follows.

[1] A plant disease control composition comprising thiastrobin and a fluorine ratio.

[2] The plant disease control composition according to [1], wherein the weight ratio of ethaboxam to fluorine is from 1:0.01 to 1:50.

[3] A seed treatment agent comprising ethaboxam and a fluorine ratio.

[4] A plant seed which is attached to an effective amount of ethaboxam and a fluorine ratio.

[5] A method for controlling a plant disease, which is applied to a soil of a plant or a cultivated plant in an effective amount of ethaboxam and a fluorine ratio.

[6] A use of a combination of ethaboxam and fluorine to control plant diseases.

The ethaboxam used in the plant disease control composition of the present invention is a compound described in the specification of U.S. Patent No. 5,514,643, which can be obtained from a commercially available preparation or by a generally known method.

The fluorine ratio used in the composition for controlling plant diseases of the present invention is a compound described in JP-A-2002-503723, which can be obtained from a commercially available preparation or by a generally known method.

In the composition for controlling plant diseases of the present invention, the weight ratio of ethaboxam to fluorine is generally preferably from 1:0.01 to 1:50, more preferably from 1:0.05 to 1:20. Meanwhile, when used as a seed treatment agent, it is generally preferably from 1:0.01 to 1:50, more preferably from 1:0.04 to 1:25.

The plant disease control composition of the present invention may be mixed with ethiazoline and fluorine ratio alone, but generally, it may be mixed with an inactive carrier such as ethaboxam, a fluorine ratio, a solid carrier or a liquid carrier, and if necessary, Adding surfactants and other auxiliary agents for formulation, and then formulating them into oils, emulsions, wettable powders, water and agents, granular water and agents, powders, granules and the like.

In the plant disease controlling composition of the present invention, the total content of the ethaboxam and the fluorine ratio is preferably from 0.1 to 99% by weight, more preferably from 0.2 to 90% by weight.

The solid carrier used in the formulation may be, for example, kaolin, magnesium aluminum sepiolite clay, bentonite, montmorillonite, acid white clay, pyrophyllite, talc, diatomaceous earth, calcite, etc., corn cob powder Natural organic matter such as walnut shell powder, synthetic organic matter such as urea, salt such as calcium carbonate and ammonium sulfate, fine powder or granule formed by synthesizing inorganic minerals such as aqueous cerium oxide; liquid carrier, for example, xylene , aromatic hydrocarbons such as toluene and methylnaphthalene, alcohols such as 2-propanol, ethylene glycol, propylene glycol, and ethylene glycol monoethyl ether; ketones such as acetone, cyclohexanone, and isophorone, soybean oil, and cottonseed Vegetable oils such as oils, petroleum aliphatic hydrocarbons, esters, dimethyl hydrazine, acetonitrile and water.

The surfactant may, for example, be an alkyl sulfate salt, an alkyl aryl sulfonate, a dialkyl sulfosuccinate or a polyoxyethylidene aryl group. Anionic surfactants such as ether phosphate ester, lignosulfonate, naphthalenesulfonate formaldehyde polycondensate, and polyoxyalkylene aryl ether, polyoxyalkylene polyoxyalkylene propyl block A nonionic surfactant such as a copolymer or a sorbitan fatty acid ester, or a cationic surfactant such as an alkyltrimethylammonium salt.

Other auxiliary agents for preparation include water-soluble polymers such as polyvinyl alcohol and polyvinylpyrrolidone, polysaccharides such as gum arabic, alginic acid and salts thereof, CMC (carboxymethyl cellulose), and Sanxian gum. An inorganic substance such as aluminum magnesium citrate or alumina sol, a preservative, a coloring agent, and a stabilizer such as PAP (acid isopropyl phosphate) or BHT.

The plant disease controlling composition of the present invention may be formulated according to the above-mentioned method in the form of each of the ethaboxam and the fluorine ratio, and may be prepared by mixing each diluted with water or each diluted solution.

The plant disease controlling composition of the present invention may further contain one or more other fungicides and/or insecticides.

The plant diseases which can be prevented by the present invention can be exemplified as follows. Rice diseases: rice fever ( Magnaporthe grisea ), flax leaf blight ( Cochliobolus miyabeanus ), sheath blight (Rizoctonia solani ), and Gibberella fujikuroi .

Wheat diseases: Erysiphe graminis , Fusarium graminearum , F. avenacerum , F. culmorum , Microdochium nivale , layer rust ( Puccinia striiformis , P. graminis , P. recondita ), red snow rot ( Micronectriella) nivale), snow ball Sclerotinia rot (Typhula spp.), loose smut (Ustilago tritici), bunt (Tilletia caries), eyespot (Pseudocercosporella herpotrichoides), leaf blight (Mycosphaerella graminicola), crown Stungospora nodorum , Pyrenophora tritici-repentis .

Barley diseases: Erysiphe graminis , Fusarium graminearum , F. avenacerum , F. culmorum , Microdochium nivale , leaf rust ( Puccinia striiformis , P. graminis , P. hordei ), bare smut ( Ustilago Nuda ), Rhynchosporium secalis , Pyrenophora teres , Cochliobolus sativus , Pyrenophora graminea , Rhizoctonia Rhizoctonia solani .

Corn diseases: Ustilago maydis , Cochliobolus heterostrophus , Gloeocercospora sorghi , Puccinia polysora , Cercospora zeae-maydis , Litchi Rhizoctonia solani caused by the genus Rhizoctonia .

Citrus diseases: Diaporthe citri , Elsinoe fawcetti , Penicillium digitatum , P.italicum , Phytophthora parasitica , Phytophthora citrophthora .

Apple diseases: Monilinia mali , Valsa ceratosperma , Podosphaera leucotricha , Alternaria alternata apple pathotype, Venturia inaequalis , Colletotrichum acutatum , Phytophtora cactorum , Diplocarpon mali , Botryosphaeria berengeriana , Helicobasidium mompa .

Pear disease: black spot disease ( Venuria nashicola , V. pirina ), Alternaria alternate Japanese pear pathotype, Gymnosporangium haraeanum , Phytophtora cactorum .

Peach disease: Monilinia fructicola , Cladosporium carpophilum , Phomopsis spp.

Grape diseases: Elsinoe ampelina , Glomerella cingulata , Uncinula necator , Phakopsora ampelopsidis , Guignardia bidwellii , Plasmopara viticola .

Persimmon disease: anthrax ( Gloeosporium kaki ), keratosis ( Cercospora kaki , Mycosphaerella nawae ).

Melon diseases: Colletotrichum lagenarium , Sphaerotheca fuliginea , Mycosphaerella melonis , Fusarium oxysporum , Pseudoperonospora cubensis , Phytophthora spp., Qu Li Blight ( Pythium spp.).

Tomato diseases: Alternaria solani , Cladosporium fulvum , Phytophthora infestans .

Eggplant disease: Phomopsis vexans , Erysiphe cichoracearum .

Cruciferous vegetable diseases: Alternaria japonica , Cercosporella brassicae , Plasmodiophora brassicae , Peronospora parasitica .

Onion disease: Puccinia allii , Peronospora destructor .

Soybean diseases: Cercospora kikuchii , Elsinoe glycines , Diaporthe phaseolorum var. sojae , Septoria glycines , Cercospora sojina , Phakopsora pachyrhizi , Phytophthora sojae , Rhizoctonia solani caused by Rhizoctonia solani .

Bean diseases: anthracnose (Colletotrichum lindemthianum).

Groundnut disease: Cercospora personata , Cercospora arachidicola , Sclerotium rolfsii .

Bowl bean disease: powdery mildew ( Erysiphe pisi ), root rot ( Fusarium solani , F. sp. pisi ).

Potato diseases: Alternaria solani , Phytophthora infestans , Phytophthora erythroseptica , Spongospora subterranean F. sp. subterranea , Rhizoctonia solani .

Strawberry disease: Sphaerotheca humuli , Glomerella cingulata .

Tea tree diseases: Exobasidium reticulatum , Elsinoe leucospila , Pestalotiopsis spp., and Colletotrichum theae-sinensis .

Tobacco diseases: Altermaria longipes , Erysiphe cichoracearum , Colletotrichum tabacum , Peronospora tabacina , and Phytophthora nicotianae .

Rape disease: Rhizoctonia solani caused by Sclerotinia sclerotiorum and Rhizoctonia solani .

Cotton disease: Rhizoctonia solani caused by Rhizoctonia solani .

Beet diseases: Cercospora beticola , Rhizoctonia solani , Rhizoctonia solani , Aphanomyces cochlioides .

Rose disease: Diplocarpon rosae , Sphaerotheca pannosa , and Peronospora sparsa .

Chrysanthemum and Composita vegetable diseases: Bremia lactucae , Septoria chrysanthemi-indici , and white rust ( Puccinia horiana ).

Various plant diseases: grass species seedling blight (Pythium) of diseases caused by fungi (Pythium debarianum, Pythium graminicola, Pythium irregulare, Pythium ultimum), gray mold (Botrytis cinerea), Sclerotinia sclerotiorum (Sclerotinia sclerotiorum), southern blight Disease ( Sclerotium rolfsii ).

Radish disease: Alternaria brassicicola .

Lawn diseases: Sclerotinia homeocarpa , brown spot leaf rot and Rhizoctonia solani .

Banana disease: leaf spot disease ( Mycosphaerella fijiensis , Mycosphaerella musicola ).

Sunflower diseases: Lou Junbing (Plasmopara halstedii).

Aspergillus , Penicillium , Fusarium , Gibberella , Trichoderma , Thielaviopsis , Rhizopus , Rhizopus Mucor (Muscular), Corticium , Phoma , Rhizoctonia , and Diplodia , causing seed diseases and early growth of various plants The disease.

Polymixa (Clostridium polymyxa) genus or Olpidium (oiler bacteria) belongs to the media and other viral diseases of various plants.

In the case of treating seeds or bulbs, etc., diseases capable of high efficiency can be expected, and specific examples thereof include: wheat, barley, corn, rice, sorghum, soybean, cotton, rape, beet, and turf grass blight. caused by bacteria of the genus Gan rot and seedling blight (Pythium debarianum, Pythium graminicola, Pythium irregulare, Pythium ultimum), black root rot of sugar beet (Aphanomyces cochlioides), Phytophthora root rot (Phytophthora sojae), tobacco disease ( Phytophthora nicotianae ), sunflower bacillus (P lasmopara halstedii ), potato blight (Phytophthora infestans ), and the like.

By applying an effective amount of ethaboxam and a fluorine ratio to the soil of plants or cultivated plants, plant diseases can be prevented. The plant to which the object is applied may, for example, be a stem or leaf of a plant, a seed of a plant, a bulb of a plant, or the like. Furthermore, the so-called bulb, which means bulbs, bulbs, rhizomes, tubers, roots and roots.

In the case of application to plants, soil of cultivated plants, etc., it is possible to separately apply the ethaboxam and the fluorine ratio at the same time, but from the viewpoint of the simplicity of ordinary application, the plant disease control for applying the present invention is used. Composition good.

Specific examples of the control method of the present invention include plant stem treatment such as treatment of plant stems and leaves, treatment of soil, etc., plant seed treatment such as seed disinfection/seed coating, and bulbs such as tubers and roots. Processing and so on.

The treatment of the plant stems and leaves in the method for controlling the present invention may be, for example, a treatment method for directly absorbing plants by transplantation, a stem and leaf dispersion, a trunk spread, or the like applied to the surface of the plant. The treatment method for directly absorbing the plant before transplantation may be a method of immersing the whole plant or the root portion, a method of immersing the root portion, or adhering to a root portion by a solid carrier formulation such as mineral powder.

The method for treating plant cultivation sites in the method for controlling the present invention may be carried out in soil, mixed soil, perfusion (medical solution irrigation, perfusion soil, drug droplet irrigation) in the soil; the treatment site may be as follows: Acupoints, planting, near planting points, near planting, comprehensive cultivation, near-ground parts of plants, between plants, under trunks, main soil, covering soil, seedling boxes, seedling trays, seedbeds, etc.; Before sowing, sowing, immediately after sowing, seedling period, before planting, at the time of planting, and the growth period after planting. At the same time, the plant cultivation site can be treated with the active ingredient at the same time, or the solid fertilizer such as the paste fertilizer containing the active ingredient can be applied to the soil. In addition, it can also be mixed with irrigation liquid, such as: infusion equipment (irrigation pipettes, irrigation pipes, water sprayers, etc.), infusion in the interplanting water, and in the water. At the same time, the irrigation liquid may be mixed with the active ingredient in advance, and then treated by an appropriate irrigation method such as the above irrigation method and other watering and water immersion.

In the method for controlling the seed of the present invention, the seed treatment, the bulb, and the like of the plant to be protected from plant diseases are treated with the plant disease control composition of the present invention, specifically, for example, the present invention The suspension of the plant disease control composition is sprayed on the surface of the seed or the surface of the bulb in a mist, and the water and the agent, the emulsion or the wettable powder of the plant disease control composition of the present invention are added in a small amount. The water is applied directly to the coating treatment of the seed or the bulb, and the seed is impregnated with the solution of the plant disease controlling composition of the present invention for a certain period of time, immersion treatment, coating treatment, and granule treatment.

When the soil of a plant or a cultivated plant is treated with ethaboxam and a fluorine ratio, the amount of the treatment, the type of the plant to be treated, the type and degree of occurrence of the plant disease, the form of the preparation, the treatment period, the weather condition, etc. In addition, the total content (hereinafter referred to as "the amount of the active ingredient") per 10,000 m ² of the ethaboxam and the fluorine ratio is preferably 1 to 5000 g, more preferably 2 to 500 g.

Emulsions, water and agents, wettable powders, etc. are generally diluted with water and then sprinkled. In this case, the concentration of the active ingredient is generally preferably 0.0001 to 3% by weight, more preferably 0.0005 to 1% by weight. Powders, granules, etc. are generally processed directly without dilution.

For the treatment of the seed, the amount of the active ingredient of 1 kg of the seed is generally preferably 0.001 to 10 g, more preferably 0.01 to 3 g.

The method for controlling the present invention can be used for agricultural fields or non-agricultural fields such as dry fields, paddy fields, turf and orchards.

Further, the present invention cultivates the following "plants" and the like In the ground, it can be used to prevent plant diseases of the agricultural land without causing phytotoxicity to the plant or the like.

Crops: corn, rice, wheat, barley, rye, oats, sorghum, cotton, soybeans, peanuts, buckwheat, beets, canola, sunflower, sugar cane, tobacco, etc. Vegetables: Solanaceae vegetables (eggplant, tomato, sweet pepper, chili) , potato, etc.), melon vegetables (courgette, pumpkin, American pumpkin, watermelon, cantaloupe, golden gourd, etc.), cruciferous vegetables (radish, turnip, horseradish, stalk, cabbage, kale, mustard, broccoli , cabbage, etc.), Compositae vegetables (burdock, artemisia, artichoke, lettuce, etc.), lily vegetables (onions, onions, garlic, asparagus), parsley vegetables (carrots, parsley, celery, American edible celery, etc.) , vegetables (spinach, leeks, etc.), lip-shaped vegetables (perilla, mint, basil, etc.), strawberries, hawthorn, yam, sweet potato, etc., flowers, foliage plants, lawns, fruit trees: pome fruits (apples) , Western pear, Yokohama, Poria, Poria , etc.), stone fruit (peach, plum, nectarine, plum, sweet cherry, apricot, dried fruit, etc.), citrus (Wenzhou mandarin, orange, lemon, lime, grape) Pomelo, etc., nuts (chestnut, walnut Chestnut, almond, pistachio, cashew, Australian walnut, etc.), berries (blueberries, cranberries, blackberries, raspberries, etc.), grapes, persimmons, olives, alfalfa, bananas, coffee, dates, coconut palms, etc. Trees other than tea: mulberry, mulberry, flower, tung tree, street tree (eucalyptus, birch, hawthorn, eucalyptus, ginkgo, lilac, maple, eucalyptus, poplar, bauhinia, sweet gum tree, sycamore tree, dragonfly Trees, thuja, eucalyptus, hemlock, juniper, pine, spruce, yew).

Among the above, it is particularly preferable to use a disease for controlling cultivation of corn, rice, wheat, barley, sorghum, cotton, soybean, sugar beet, rape, lawn, and potato.

The above "plants" also contain genetically modified plants.

Example

Hereinafter, the present invention will be described in more detail by way of formulation examples, seed treatment examples, and test examples, but the present invention is not limited to the following examples. In the following examples, the parts represent parts by weight unless otherwise specified.

Formulation Example 1

10 parts of ethaboxam, 2 parts of fluorine, 14 parts of polyethylene oxide styrylphenyl ether, 6 parts of calcium dodecyl benzosulfonate, and 76.5 parts of xylene were uniformly mixed. preparation.

Formulation Example 2

8 parts of ethaboxam, 2 parts of fluorine ratio, 35 parts of a mixture of carbon white and polyethylene oxide alkyl ether sulfate ammonium salt (weight ratio 1:1), and 55 parts of water are mixed, and wet type The pulverization method is finely pulverized to prepare a preparation.

Formulation Example 3

Mixing 2 parts of ethaboxam, 10 parts of fluorine, 1.5 parts of sorbitan trioleate, and 31.5 parts of an aqueous solution of 2 parts of polyvinyl alcohol, after being finely pulverized by wet pulverization, and then added thereto A solution of 0.05 parts of Sanxian gum and 0.1 part of aluminum magnesium citrate was added, and 10 parts of propylene glycol was further added and stirred to prepare a preparation.

Formulation Example 4

40 parts of ethaboxam, 5 parts of fluorine ratio, 5 parts of propylene glycol (manufactured by NACALAI TESQUE), 5 parts of Soprophor FLK (manufactured by Rhodia Nicca Co., Ltd.), 0.2 parts of antifoam C emulsion (manufactured by Dow Corning Toray Co., Ltd.), PROXEL GXL 0.3 parts (manufactured by Arch Chemical Co., Ltd.) and ion-exchanged water were mixed at a ratio of 49.5 parts to prepare a raw material slurry. 150 parts of glass fine beads (Φ = 1 mm) were placed in 100 parts of the slurry, and pulverized for 2 hours while being cooled with cooling water. After pulverization, the glass beads were removed by filtration to obtain a preparation.

Formulation Example 5

10 parts of ethaboxam, 40 parts of fluorine ratio, 38.5 parts of NN kaolin (manufactured by Takehara Chemical Industry Co., Ltd.), 10 parts of Morwet D425, and 1.5 parts of Morwet EFW (manufactured by AkzoNobel Co., Ltd.) were mixed and prepared. The mixture was pulverized by a jet mill to obtain a formulation.

Formulation Example 6

3 parts of ethaboxam, 2 parts of fluorine, 1 part of synthetic hydrous cerium oxide, 2 parts of calcium lignin sulfonate, 30 parts of bentonite, and 62 parts of kaolin are completely pulverized and mixed, and after adding water and mixing, after making The granules were dried to give a preparation.

Formulation Example 7

20 parts of ethaboxam, 15 parts of fluorine ratio, 3 parts of calcium lignosulfonate, 2 parts of sodium lauryl sulfate, and 60 parts of synthetic aqueous cerium oxide were completely pulverized and mixed to obtain a preparation.

Formulation Example 8

5 parts of ethaboxam, 1 part of fluorine, 84 parts of kaolin, and talc Ten parts were completely pulverized and mixed to obtain a preparation.

Seed treatment example 1

The preparation prepared in accordance with Formulation Example 1 was subjected to a coating treatment with a rotary seed processor (Seed Dresser, manufactured by Hans-Ulrich Hege GmbH) to obtain a treated seed at a rate of 500 mL per 100 kg of sorghum dried seeds.

Seed treatment example 2

The preparation prepared in accordance with Formulation Example 2 was subjected to a coating treatment with a rotary seed processor (Seed Dresser, manufactured by Hans-Ulrich Hege GmbH) to obtain a treated seed, with 50 mL of 10 kg of dried rapeseed seeds.

Seed treatment example 3

The preparation prepared in accordance with Formulation Example 3 was subjected to a coating treatment with a rotary seed processor (Seed Dresser, manufactured by Hans-Ulrich Hege GmbH) to obtain a treated seed in an amount of 40 mL with respect to 10 kg of dried corn seeds.

Seed treatment example 4

5 parts of the preparation prepared in Formulation Example 4, 5 parts of the coloring material BPD6135 (manufactured by Sun Chemical Co., Ltd.), and 35 parts of water were mixed to prepare a mixture. The mixture was subjected to a coating treatment with a rotary seed processor (Seed Dresser, manufactured by Hans-Ulrich Hege GmbH) to obtain a treated seed in an amount of 60 mL with respect to 10 kg of dried rice seeds.

Seed treatment example 5

The preparation prepared according to Formulation Example 5 is dried relative to corn. The seed of 10 kg was 50 g, and the powder coating treatment was carried out to obtain a treated seed.

Seed treatment example 6

The preparation prepared in accordance with Formulation Example 1 was subjected to a coating treatment with a rotary seed processor (Seed Dresser, manufactured by Hans-Ulrich Hege GmbH) to obtain a treated seed, 500 kg of 100 kg of dried beet seeds.

Seed treatment example 7

The preparation prepared in accordance with Formulation Example 2 was subjected to a coating treatment with a rotary seed processor (Seed Dresser, manufactured by Hans-Ulrich Hege GmbH) to obtain a treated seed, 50 kg of 10 kg of soybean dried seeds.

Seed treatment example 8

According to the preparation prepared in Formulation Example 3, 50 mL of 10 kg of wheat dry seeds was applied and coated by a rotary seed treatment machine (Seed Dresser, manufactured by Hans-Ulrich Hege GmbH) to obtain treated seeds.

Seed treatment example 9

5 parts of the preparation prepared in accordance with Formulation Example 4, 5 parts of coloring material BPD6135 (manufactured by Sun Chemical Co., Ltd.), and 35 parts of water were mixed, and 70 mL of 10 kg with respect to sunflower seeds was passed through a rotary seed treatment machine (Seed Dresser, Hans- The coating treatment was carried out by Ulrich Hege GmbH, and the treated seeds were obtained.

Seed treatment example 10

It will be dried in accordance with the preparation prepared in Preparation Example 5 in relation to cotton. The seed 10 kg was 40 g, and the powder coating treatment was carried out to obtain the treated seed.

Test example 1

30 mL of a test drug solution obtained by mixing a solution of thiazolamide dimethylammonium (hereinafter referred to as DMSO) and a DMSO solution having a fluorine ratio at a predetermined concentration in a tomato cultivated in a diameter of 5.5 cm Spray treatment on the seedlings. On the next day, the seedlings were inoculated with a spore suspension of Phytophthora infestans ( tobacco plague ), and the tomatoes were cultivated at 20 ° C and humidity of 100% for 24 hours, and then at 20 ° C for 5 days, and then the area was determined. The incidence area ratio was determined.

For comparison, a DMSO solution containing a predetermined concentration of ethaboxam and a DMSO solution containing a predetermined concentration of a fluorine ratio were further prepared, and the same test was carried out.

(Hereinafter, it is called the treatment area incidence area rate.)

Incidence area ratio = 100 × (incidence tomato leaf area value / tomato leaf area value)

Then, 30 mL of water was used instead of 30 mL of the test drug, and the same operation as described above was carried out to obtain an area ratio of incidence (hereinafter referred to as a disease-free area ratio of no treatment area).

From the incidence area of the treatment area and the area ratio of the treatment area, the control price is calculated by the following formula.

Control price (%) = 100 × (A-B) / A

A: area of disease-free area

B: incidence area of treatment area

The results are shown in Table 1.

Test example 2

The acetone solution of ethaboxam is mixed with the acetone solution of the fluorine ratio to prepare an acetone solution containing a predetermined concentration of ethaboxam and a fluorine ratio. The acetone solution was attached to the surface of the seed of cucumber (phase mold semi-white) and allowed to stand overnight. Then, the loam was placed in the plastic crucible, the seed was sown, and the soil was covered with the sandy loam soil mixed with the wheat mash culture medium of Pythium ultimum . After irrigation, it was grown at 25 ° C for 7 days, and the control effect was investigated.

For comparison, an acetone solution containing a predetermined concentration of ethaboxam and an acetone solution containing a predetermined concentration of fluorine were additionally prepared, and the same test was carried out.

(Hereinafter, it is called the plant area incidence rate in the treatment area.)

At the same time, in order to calculate the control price, the incidence rate under the no-agent treatment (hereinafter referred to as the untreated area plant incidence rate) was investigated.

The incidence rate of the treatment zone and the non-treatment zone is calculated by the formula 1, and the control price is calculated by the formula 2 according to the incidence rate. The results are shown in Table 2.

Incidence rate of "Formula 1" = (number of ungerminated seeds and number of seedlings) × 100 / (total number of seeds)

"Formula 2" control price = 100 × (C-D) / C

C: Untreated area plant incidence

D: Plant incidence rate in the treatment area

Industrial use possibility

With the composition of the present invention, plant diseases can be prevented.

Claims (6)

A plant disease control composition comprising thiastrobin and a fluorine ratio. The plant disease controlling composition according to the first aspect of the invention, wherein the weight ratio of the ethaboxam to the fluorine is 1:0.01 to 1:50. A seed treatment agent comprising ethaboxam and a fluorine ratio. A plant seed that is attached to an effective amount of ethaboxam and a fluorine ratio. A method for controlling plant diseases, characterized by applying an effective amount of ethaboxam and a fluorine ratio to a soil of a plant or a cultivated plant. The use of a combination of ethaboxam and fluorine is used to control plant diseases.