JP2017039651A - Agrochemical composition and usage thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agrochemical composition for foliage treatment that does not cause adhesion agrochemical injury to cultivated crops when pyroxasulfone is applied to upland field for foliage treatment, that has a high safety property, can maintain long-term efficacy and has a wide herbicidal spectrum.SOLUTION: An agrochemical composition for foliage treatment contains a pyroxasulfone and a concealing substance for concealing the pyroxasulfone, in which the concealing substance is a polyurethane and/or polyurea produced via reaction between an aliphatic isocyanate or aromatic isocyanate, or isocyanate containing both of them, and a water-soluble active hydrogen-containing compound. The polyurethane and/or polyurea micro-encapsulates the pyroxasulfone so as not to cause adhesion agrochemical injury to cultivated crops during foliage scattering. Further, the agrochemical composition can also be applied for foliage treatment in non-agricultural crop land.SELECTED DRAWING: None

Description

  The present invention relates to an agrochemical composition for foliage treatment that can maintain a medicinal effect for a long period of time and can reduce or prevent phytotoxicity during foliage treatment.

  Piroxasulfone can be found in grasses such as barnyardgrass, red beetle, wild oats, bluegrass, wild oats, blue grasses, green grasses, wild oats Long-leaved weeds such as chickweed, yellow-tailed swordfish, yellow stag beetle, horned foxtail, ragweed, morning glory, yamgra, giant black-bellied, broad-leaf weed It is known to show a high herbicidal effect and to have a broad herbicidal spectrum.

  However, when treated with foliage in the field, pyroxasulfone is sometimes wheat, barley, rye, corn, sorghum, soybean, rapeseed, safflower, sunflower, flax, groundnut, sesame, potato, sweet potato, onion, garlic, sugar beet. It may cause phytotoxicity to useful crops such as fruit trees such as cotton, mint, buckwheat, sugarcane, cassava, vegetables, flower buds and trees, and useful plants, and the use scene is limited to soil treatment.

  For this reason, a pesticide composition for treating upland foliage that is highly safe for these useful crops and useful plants and has a broad herbicidal spectrum has been desired as an agrochemical active ingredient comparable to pyroxasulfone.

  On the other hand, the microencapsulation technology of an pesticidal active ingredient is known. For example, Non-Patent Document 1 discloses microcapsules of various useful compounds including pesticidal active ingredients using various substances as wall materials and the production thereof. A method is disclosed.

  However, conventionally, microencapsulation of pesticidal active ingredients has generally been aimed at controlling elution of pesticidal active ingredients. Since the elution of the pesticidal active ingredient from the pesticidal composition, including the elution of the pesticidal active ingredient from the microcapsule, is always performed through the water in the field, the pesticidal active ingredient is used in an environment such as paddy fields where water is abundant. Microencapsulation has been considered a useful technique. Therefore, until now, microencapsulation of pesticidal active ingredients has been considered difficult to apply in fields such as farmland where water is scarce. In other words, until now, there is little knowledge of pesticide compositions microencapsulated for the purpose of phenomena other than elution control, and especially foliar treatment is possible by microencapsulating Piroxasulfone, which is applicable to soil treatment. No formulation technology was known.

Koishi et al., “Development and application of micro / nano capsules and microparticles”, CMC Publishing Co., Ltd., August 31, 2003, full text

  An object of the present invention is to provide a pesticide composition for foliage treatment that has high safety and has a wide herbicidal spectrum without causing chemical damage to cultivated crops when the foliage is treated with piroxasulfone. Is to provide.

  As a result of diligent research to solve this problem, the present inventors have found that polyurethanes and / or polyurethanes produced through the reaction of an isocyanate containing aliphatic isocyanate and / or aromatic isocyanate with a water-soluble active hydrogen-containing compound and / or Alternatively, Piroxasulfone is microencapsulated with polyurea to prevent the exposure of Piroxasulfone, and the concealment of Piroxasulfone by the microcapsule is effective at the time of foliage spraying, and then is quickly impaired. As a result, the inventors have found that the above problems can be solved, and have completed the present invention.

That is, the present invention has the following contents.
(1) An agrochemical composition for treating foliage comprising pyroxasulfone and a concealing substance that conceals pyroxasulfone, wherein the concealing substance comprises an aliphatic isocyanate, an aromatic isocyanate, or both. Polyurethane and / or polyurea produced through the reaction of a water-soluble active hydrogen-containing compound with the polyurethane and / or polyurea so that the polyurethane and / or polyurea does not cause phytotoxicity to cultivated crops when spraying foliage. A pesticide composition for treating foliage, which is microencapsulated.
(2) The agrochemical composition for foliage treatment according to (1), wherein the aromatic isocyanate is a benzene ring direct-coupled diisocyanate.
(3) The agrochemical composition for foliage treatment according to (2), wherein the benzene ring direct-linked diisocyanate is tolylene diisocyanate.
(4) The agrochemical composition for foliage treatment according to any one of (1) to (3), wherein the aromatic isocyanate is a monomeric aromatic diisocyanate.
(5) The agrochemical composition for foliage treatment according to (4), wherein the monomeric aromatic diisocyanate is diphenylmethane diisocyanate.
(6) The agrochemical composition for foliar treatment according to any one of (1) to (5), wherein pyroxasulfone is encapsulated or encapsulated in the polyurethane and / or polyurea wall material and microencapsulated. object.
(7) The agrochemical composition for foliage treatment according to any one of (1) to (6), wherein an average particle size of the microcapsules is 150 μm or less.
(8) The agrochemical composition for foliage treatment according to any one of (1) to (7), wherein a blending ratio of the concealing substance is 0.1 to 50 parts by mass with respect to 1 part by mass of pyroxasulfone. object.
(9) Pyroxasulfone is microencapsulated with polyurethane and / or polyurea produced through reaction of an isocyanate containing aliphatic isocyanate or aromatic isocyanate or both with a water-soluble active hydrogen-containing compound. The method for producing a pesticide composition for foliage treatment according to any one of (1) to (8), which is characterized by the following.
(10) The foliage treatment according to any one of (1) to (9), wherein the dosage form is a powder, a granule, a wettable powder, a wettable granule, an aqueous suspension preparation, or an oily suspension preparation. Pesticide composition.
(11) after turning a predetermined amount of foliage treatment pesticidal composition to 20 ° C. water, when measuring the pyroxasulfone concentration K ₂₄ after pyroxasulfone concentration K ₁ after 1 hour and 24 hours in water K ₁ is 55% or less of the water solubility of Piroxasulfone, K ₂₄ is less than twice the water solubility of Piroxasulfone, and K ₁ is 55% or less of K _24. The agrochemical composition for foliage treatment according to any one of (1) to (10), characterized in that it is characterized in that
(12) The agrochemical composition for foliage treatment according to any one of (1) to (11), further including an agrochemical active ingredient other than pyroxasulfone.
(13) The foliage treatment, characterized by mixing and using the agrochemical composition for foliage treatment according to any one of (1) to (12) and an agrochemical active ingredient other than pyroxasulfone. Method.
(14) A method for controlling pests, comprising applying the pesticide composition for foliage treatment according to any one of (1) to (13) above to a field where a cultivated crop grows in a growing season. .
(15) The cultivated crop is wheat, barley, rye, corn, sorghum, soybean, rapeseed, safflower, sunflower, flax, groundnut, sesame, potato, sweet potato, onion, garlic, sugar beet, cotton, mint, sugar cane, cassava or shiba The control method according to (14), wherein
(16) A method for controlling pests, comprising subjecting the agrochemical composition according to any one of (1) to (12) to a foliage treatment on non-agricultural land.

  According to the present invention, when a foliage is treated with pyroxasulfone, a pesticide composition for foliage treatment that does not cause harmful drug damage to cultivated crops, has high safety, and has a broad herbicidal spectrum. Can be provided.

  The pesticide composition for foliage treatment according to the present invention is a pesticide composition for foliage treatment comprising pyroxasulfone and a concealing substance that conceals pyroxasulfone, wherein the concealing substance is an aliphatic isocyanate or an aromatic. Polyurethane and / or polyurea produced through the reaction of an isocyanate or an isocyanate containing both and a water-soluble active hydrogen-containing compound, and the polyurethane and / or polyurea so as not to cause adhesive damage to cultivated crops when foliage is sprayed The polyurea has a structure in which pyroxasulfone is microencapsulated to prevent the exposure of pyroxasulfone. Such an agrochemical composition for foliar treatment can be produced by a method of encapsulating or encapsulating pyroxasulfone in a polyurethane and / or polyurea wall material and microencapsulating it.

  The blending ratio of isocyanate in the agrochemical composition for foliage treatment is not particularly limited, but is preferably 0.1 to 50 parts by mass with respect to 1 part by mass of pyroxasulfone. Within such a range, it is preferable that no phytotoxicity is caused to the cultivated crop when spraying the foliage and the concealing property of the concealing substance is lost immediately after the spraying.

  As a method for encapsulating or encapsulating pyroxasulfone in a polyurethane and / or polyurea wall material and microencapsulating, for example, an isocyanate containing an aliphatic isocyanate or an aromatic isocyanate or both, and a non-crystalline state The first liquid consisting of a volatile hydrophobic solution containing sasulfone is charged into the second liquid consisting of an aqueous solution containing a water-soluble polymer and a water-soluble active hydrogen-containing compound, and then stirred at high speed and then heated. A method of obtaining a microcapsule in which pyroxasulfone is encapsulated in a polyurethane and / or polyurea matrix by volatilizing the hydrophobic solvent of the first liquid is mentioned.

  Alternatively, for example, a first reaction solution comprising an isocyanate containing an aliphatic isocyanate or an aromatic isocyanate or both, a crystalline state of pyroxasulfone, and a volatile hydrophobic solvent may be used as a water-soluble polymer. After being charged into the second reaction liquid comprising an aqueous solution containing a water-soluble active hydrogen-containing compound, the mixture is stirred at a high speed and then heated to volatilize the hydrophobic solvent of the first liquid while aliphatic isocyanate or aromatic Method of obtaining microcapsules encapsulating pyroxasulfone using polyurethane and / or polyurea as a wall material by reacting isocyanate or isocyanate containing both, water-soluble polymer and compound containing water-soluble active hydrogen Is mentioned.

  As a further alternative, for example, a water-soluble polymer is added to the first reaction liquid comprising an isocyanate containing an aliphatic isocyanate or an aromatic isocyanate or both, a crystalline state of pyroxasulfone and a non-volatile hydrophobic solvent. And a second reaction solution comprising an aqueous solution containing a water-soluble active hydrogen-containing compound, and then stirred at high speed and then heated to obtain the hydrophobic isocyanate, the water-soluble polymer, and the water-soluble active hydrogen-containing compound. A method of obtaining a microcapsule encapsulating pyroxasulfone with polyurethane and / or polyurea as a wall material by reacting is mentioned.

  In the above method, the first reaction comprising an isocyanate containing aliphatic isocyanate and / or aromatic isocyanate and a non-volatile hydrophobic solvent instead of the method of blending crystalline pyroxasulfone in the first reaction solution The solution may be mixed with a second reaction solution composed of an aqueous solution containing a water-soluble polymer and a water-soluble active hydrogen-containing compound, and pyroxasulfone may be added to the mixture while stirring at high speed.

  In each of the above methods, the active hydrogen-containing compound contained in the second reaction solution may be reacted by mixing the first reaction solution and the aqueous solution of the water-soluble polymer separately and then gently stirring. Good.

  In this case, as the aromatic isocyanate used in combination with pyroxasulfone in the first reaction liquid, for example, tolylene diisocyanate such as 2,4-tolylene diisocyanate and 2,6-tolylene diisocyanate, and 2,2′-diphenylmethane diisocyanate 2,4'-diphenylmethane diisocyanate, 4,4'-diphenylmethane diisocyanate, and the like.

  In the first reaction solution, the hydrophobic solvent for dissolving and suspending the isocyanate and pyroxasulfone containing aliphatic isocyanate, aromatic isocyanate, or both is not particularly limited. For example, ethyl ether , Ethers such as dioxane, ethylene glycol monoethyl ether, dipropyl ether, dibutyl ether and tetrahydrofuran, aliphatic hydrocarbons such as normal paraffin, naphthene, isoparaffin, kerosene, mineral oil, benzene, toluene, xylene, solvent naphtha, alkyl Aromatic hydrocarbons such as naphthalene and phenylxylylethane, halogenated hydrocarbons such as dichloromethane, chloroform and carbon tetrachloride, ethyl acetate, diisopropyl phthalate, dibutyl phthalate, dioctyl Rate, dimethyl adipate, diisobutyl adipate, esters such as diisodecyl adipate, soybean oil, rapeseed oil, cottonseed oil, vegetable oils such as castor oil can be exemplified, in particular phenyl xylyl ethane is preferred.

  Next, the water-soluble polymer used as a component of the second reaction liquid is not particularly limited, and examples thereof include polyacrylic acid or a water-soluble salt thereof, polyethylene glycol, polyvinyl pyrrolidone, and polyvinyl alcohol. The concentration of these water-soluble polymers in the aqueous solution is not particularly limited, but is usually selected from the range of 0.5 to 5% by mass.

  Examples of the water-soluble active hydrogen-containing compound contained in the second reaction solution include hydroxy compounds such as glycols and glycerin, and amino compounds such as ethylenediamine. Water also plays a role as an active hydrogen-containing compound, but it does not need to be added because it exists in an aqueous solution.

  Although the reaction conditions of the first reaction liquid and the second reaction liquid depend on the isocyanate, the hydrophobic solvent and the water-soluble polymer containing aliphatic isocyanate or aromatic isocyanate or both, for example, both of them are 1000 to 10000 rpm. After mixing with high speed stirring at a speed, stirring is performed for about 10 minutes to 6 hours at room temperature or while heating to a temperature of 50 to 100 ° C.

  By the above reaction, polyurethane is formed when a hydroxy compound or an amino compound is used as the active hydrogen-containing compound, and polyurea is formed when water acts as the active hydrogen-containing compound. Become. Therefore, the use ratios of the aliphatic isocyanate or aromatic isocyanate in the first reaction liquid to be the reactant, or the isocyanate containing both, the water-soluble active hydrogen-containing compound and the water-soluble polymer in the second reaction liquid are respectively It is determined stoichiometrically based on the reaction formula for producing polyurethane or polyurea.

  The above reaction is further carried out as desired, for example, xanthan gum, carboxymethyl cellulose or a salt thereof, gum arabic, gelatin, dextrin, water-soluble thickener such as water-soluble starch, sorbitan fatty acid ester, sucrose fatty acid ester, polyoxyethylene Fatty acid ester, polyoxyethylene resin acid ester, polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene polyoxypropylene block copolymer, alkyl polyoxyethylene polypropylene block copolymer ether, polyoxyalkylene styryl phenyl ether, polyoxy Nonionic surfactants such as ethylene castor oil and polyoxyethylene hydrogenated castor oil, alkyl sulfates, alkylbenzene sulfonates, Anionic surfactants such as ninsulfonate, alkylsulfosuccinate, naphthalenesulfonate, alkylnaphthalenesulfonate, salt of formalin condensate of naphthalenesulfonic acid, salt of formalin condensate of alkylnaphthalenesulfonic acid, polyalkyl You may carry out in presence of antifoamers, such as siloxane and a higher fatty acid salt. These additives may be previously contained in the first reaction liquid or the second reaction liquid, or may be added separately from the first reaction liquid and the second reaction liquid.

  The average particle diameter (volume median diameter) of the microencapsulated pyroxasulfone of the present invention thus obtained can be appropriately selected. The particle diameter is usually selected from the range of 0.1 to 150 μm, preferably 0.5 to 100 μm, more preferably 1 to 50 μm.

  The pesticide composition for treating foliage of the present invention can optionally contain additive components usually used in agrochemical formulations as necessary.

  Examples of the additive component include a carrier such as a solid carrier and a liquid carrier, a surfactant, a binder, a tackifier, a thickener, a colorant, a spreading agent, a spreading agent, an antifreezing agent, and a caking agent. Examples thereof include an inhibitor, a disintegrant, a decomposition inhibitor, and an antifoaming agent. In addition, you may use a preservative, a plant piece, etc. for an additional component as needed. These additive components may be used alone or in combination of two or more.

  Examples of the solid carrier include quartz, clay, silica sand, kaolinite, pyrophyllite, sericite, talc, bentonite, acid clay, attapulgite, zeolite, diatomaceous earth and other natural minerals, calcium carbonate, ammonium sulfate, sodium sulfate, potassium chloride and the like. Inorganic salts, synthetic silicic acid, synthetic silicate, starch, cellulose, organic solid carriers such as plant powder, plastic carriers such as polyethylene, polypropylene, polyvinylidene chloride, urea, inorganic hollow body, plastic hollow body, fumed silica (Fumed silica, white carbon) and the like. These may be used alone or in combination of two or more.

  Examples of the liquid carrier include monohydric alcohols such as methanol, ethanol, propanol, isopropanol, and butanol, and polyhydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol, hexylene glycol, polyethylene glycol, polypropylene glycol, and glycerin. Alcohols, polyhydric alcohol compounds such as propylene glycol ether, ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, cyclohexanone, ethyl ether, dioxane, ethylene glycol monoethyl ether, dipropyl ether, tetrahydrofuran, etc. Ethers, normal paraffins, naphthenes, isoparaffins, kerosene, mineral oils and other aliphatic hydrocarbons, Aromatic hydrocarbons such as benzene, toluene, xylene, solvent naphtha, alkylbenzene and alkylnaphthalene, halogenated hydrocarbons such as dichloromethane, chloroform and carbon tetrachloride, ethyl acetate, diisopropyl phthalate, dibutyl phthalate, dioctyl phthalate, adipic acid Esters such as dimethyl, lactones such as γ-butyrolactone, amides such as dimethylformamide, diethylformamide, dimethylacetamide, N-alkylpyrrolidinone, nitriles such as acetonitrile, sulfur compounds such as dimethylsulfoxide, soybean oil, rapeseed Examples thereof include vegetable oils such as oil, cottonseed oil and castor oil, and water. These may be used alone or in combination of two or more.

  Examples of the surfactant include sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, sucrose fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene resin acid ester, polyoxyethylene fatty acid diester, polyoxyethylene alkyl ether, polyoxyethylene alkyl ether, Oxyethylene alkyl phenyl ether, polyoxyethylene dialkyl phenyl ether, polyoxyethylene alkyl phenyl ether formalin condensate, polyoxyethylene polyoxypropylene block copolymer, alkyl polyoxyethylene polypropylene block copolymer ether, polyoxyethylene alkylamine, polyoxyethylene Fatty acid amide, polyoxyethylene fatty acid bisphenyl ether, polyalkyleneben Such as ruphenyl ether, polyoxyalkylene styryl phenyl ether, acetylene diol, polyoxyalkylene-added acetylene diol, polyoxyethylene ether type silicone, ester type silicone, fluorosurfactant, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, etc. Nonionic surfactant, alkyl sulfate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl phenyl ether sulfate, polyoxyethylene styryl phenyl ether sulfate, alkyl benzene sulfonate, lignin sulfonate, alkyl sulfosuccinic acid Salt, salt of naphthalene sulfonate, alkyl naphthalene sulfonate, salt of formalin condensate of naphthalene sulfonic acid, salt of alkyl naphthalene sulfonic acid Anionic surfactants such as salt of marine condensate, fatty acid salt, polycarboxylate, N-methyl-fatty acid sarcosinate, resin acid salt, polyoxyethylene alkyl ether phosphate, polyoxyethylene alkyl phenyl ether phosphate , Cationic surfactants such as alkylamine salts such as laurylamine hydrochloride, stearylamine hydrochloride, oleylamine hydrochloride, stearylamine acetate, stearylaminopropylamine acetate, alkyltrimethylammonium chloride, alkyldimethylbenzalkonium chloride, Examples include amphoteric surfactants such as amino acid type or betaine type. These surfactants may be used alone or in combination of two or more.

  Examples of binders and tackifiers include carboxymethyl cellulose and salts thereof, dextrin, water-soluble starch, xanthan gum, guar gum, sucrose, polyvinyl pyrrolidone, gum arabic, polyvinyl alcohol, polyvinyl acetate, sodium polyacrylate, and an average molecular weight of 6000. -5 million polyoxyethylene, phospholipids (eg, cephalin, lecithin, etc.) and the like. These binders and tackifiers may be used alone or in combination of two or more.

  Examples of the thickener include xanthan gum, guar gum, carboxymethylcellulose, polyvinylpyrrolidone, carboxyvinyl polymer, acrylic polymer, starch derivative, water-soluble polymer such as polysaccharide, high-purity bentonite, fumed silica (fumed silica, Inorganic fine powders such as white carbon). These thickeners may be used alone or in combination of two or more.

  Examples of the colorant include inorganic pigments such as iron oxide, titanium oxide, and Prussian blue, organic dyes such as alizarin dyes, azo dyes, and metal phthalocyanine dyes. These colorants may be used alone or in combination of two or more.

  Examples of the spreader include cellulose powder, dextrin, modified starch, polyaminocarboxylic acid chelate compound, cross-linked polyvinyl pyrrolidone, a copolymer of maleic acid and styrene, a (meth) acrylic acid copolymer, and a polyhydric alcohol. And a half ester of a polymer and a dicarboxylic acid anhydride, a water-soluble salt of polystyrene sulfonic acid, and the like. These spreading agents may be used alone or in combination of two or more.

  Examples of the spreading agent include paraffin, terpene, polyamide resin, polyacrylate, polyoxyethylene, wax, polyvinyl alkyl ether, alkylphenol formalin condensate, starch phosphate ester, and synthetic resin emulsion. These spreading agents may be used alone or in combination of two or more.

  Examples of the antifreezing agent include polyhydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol, and glycerin. These anti-freezing agents may be used alone or in combination of two or more.

  Examples of the anti-caking agent include polysaccharides such as starch, alginic acid, mannose, and galactose, polyvinylpyrrolidone, fumed silica (fumed silica, white carbon), ester gum, and petroleum resin. These anti-caking agents may be used alone or in combination of two or more.

  Examples of the disintegrant include sodium tripolyphosphate, sodium hexametaphosphate, metal stearate, cellulose powder, dextrin, methacrylate copolymer, polyvinylpyrrolidone, polyaminocarboxylic acid chelate compound, sulfonated styrene / isobutylene / maleic anhydride Examples include acid copolymers and starch / polyacrylonitrile graft copolymers. These disintegrants may be used alone or in combination of two or more.

  Examples of the decomposition inhibitor include desiccants such as zeolite, quicklime, and magnesium oxide, antioxidants such as phenolic compounds, amine compounds, sulfur compounds, and phosphoric acid compounds, and ultraviolet absorbers such as salicylic acid compounds and benzophenone compounds. Can be mentioned. These decomposition inhibitors may be used alone or in combination of two or more.

  Examples of the antifoaming agent include dimethylpolysiloxane, modified silicone, polyether, fatty acid ester, fatty acid salt and the like. These antifoaming agents may be used alone or in combination of two or more.

  Examples of preservatives include sodium benzoate, sodium parahydroxybenzoate, potassium sorbate, 1,2-benzothiazolin-3-one, and the like. These preservatives may be used alone or in combination of two or more.

  Examples of plant pieces include sawdust, coconut husk, corn cob, tobacco stem, and the like. These plant pieces may be used alone or in combination of two or more.

  When the above-mentioned additive component is contained in the agrochemical composition for foliage treatment of the present invention, the blending ratio is usually 5 to 95%, preferably 20 to 90% for the carrier, and usually 0.1 for the surfactant, on a mass basis. -30%, preferably 0.5-10%, and other additive components are usually selected in the range of 0.1-30%, preferably 0.5-10%.

  The agrochemical composition for treatment of foliage of the present invention may be a composition that is a concealing substance obtained by microencapsulating pyroxasulfone as it is. It is used by formulating into any dosage form such as powder, granule wettable powder, aqueous suspension formulation, oil suspension formulation, granule, jumbo agent, suspoemulsion or uniform diffusion formulation. Preferred dosage forms include powders, granules, wettable powders, granular wettable powders, aqueous suspension preparations and oily suspension preparations.

  When the agrochemical composition for foliage treatment of the present invention is a granular material, examples of the granular material include a spherical shape, a cylindrical shape, a spindle shape, or an indefinite shape having a particle size of 0.3 to 10 mm.

  The particle size of the spherical granule is usually 0.3 to 10 mm, preferably 0.3 to 3 mm.

  The diameter of the columnar granule is usually 0.6 to 5 mm, preferably 0.8 to 3 mm, and the particle length is usually 1 to 10 mm, preferably 1.5 to 8 mm.

  The minor axis of the spindle-shaped granule is usually 0.3 to 3 mm, and the major axis is usually 1 to 10 mm.

  In addition, when formulating the pesticidal composition for foliar treatment of the present invention, one or more other pesticidal active ingredients can be arbitrarily mixed in addition to the pyroxasulfone contained in the composition. . The other pesticidal active ingredients mentioned here may be blended in a form encapsulated or encapsulated in polyurethane and / or polyurea together with pyroxasulfone, or in a configuration according to the composition of the present invention, Separately, it may be incorporated, encapsulated or covered in a concealing substance. Or you may mix the arbitrary agrochemical active ingredient which does not comprise the concealment structure like this invention within the range which does not impair the effect of this invention. Optional agrochemical active ingredients referred to herein include pyroxasulfone. Furthermore, it can also be set as a mixed composition with arbitrary phytotoxicity reduction components and agricultural materials other than agricultural chemicals, such as a fertilizer.

  Examples of herbicidal active ingredients that can be mixed, herbicidal active ingredients, bactericidal active ingredients, plant growth regulating active ingredients that can be blended are described below, but the present invention is not limited to these agrochemical active ingredients Absent.

Herbicidal active ingredient:
Ioxynil, aclonifen, acrolein, azaphenidin, acifluorfen (including salts such as sodium), azimsulfuron, acelam, acelam acetochlor, atrazine, anilofos, amicarbazone, amidosulfuron, amitrole, aminocyclopyrachlor, aminopyrochlor, aminopyrochlor os-methyl, amethrin, alachlor, alloxydim, isouron, isoxachlortole, isoxaflutole, isoxaben, isoproben ), Ipfencarbazone, imazaquin, imazapic (including salts with amines, etc.), imazapyr (including salts such as isopropylamine), imazametabenz methyz methyz-methyl (imabine) ), Imazamox, imazetapill (i azethapyr, imazosulfuron, indaziflam, indanofan, eglinazine-ethyl, esprocarb, esprocarb. Ethidimuron, ethoxysulfuron, ethoxyphen-ethyl, etofumesate, etobenzanid, endothal disodium salt ), Oxadiazon, oxadiaargyl, oxadichromefone, oxyfluorfen, oryzalin, orthosulfamurone, robencure • Carboxylate-carbylate, carbbutilate, carbetamide, quizalofop-ethyl, quizalofop-P-ethylp op-P-tefuryl, quinoclamamine, quinclorac, quinmerac, cumyluron, clasyfos, glyphosate (sodium, potassium, amine, propyl) , Including salts such as dimethylamine or trimesium), glufosinate (including salts such as amine or sodium), glufosinate-P-sodium, cletodim, clodnahop propargyl ( clodinafop-propargyl), clopyralid, Romazone, chloromethoxyphen, clomeprop, chloranthram-methyl, chloramben, chloriduron, chlorimururyl ), Chlorthal-dimethyl, chlorthiamid, chlorphthalim, chlorflulenol-methyl, chlorpropham, chlorbromulone orbromuron, chloroxuron, chlorotoluron, saflufenacil, cyanazine, cyanamide, diuramine, diethyamine-diethylamine , Isopropylamine, diglycolamine, salts such as sodium or lithium), cycloate, cycloxydim, diclosulam, cyclosulfamuron, cyclopyrimorate, diclobe Diclobenil, diclohop-P-methyl, diclohop-methyl, dichlorprop, dichlorprop-P, diquat, diquat Dithiopyr, siduron, dinitramine, cinidone-ethyl, cinosulfuron, dinoterb, cyhalofop-b-diphen difenzoquat), diflufenican (dif) ufenican, diflufenzopyr, simazine, dimethachlor, dimetamethrin, dimethenamide, dimethenamide, methetamide, dimethenamide Dimefuron, cinmethylin, swep, sulcotrione, sulfentrazone, cetoxydim, terbacil, dairamon, daimuron, daimuron pon), thiazopyr, thiafenacil, thiencarbazone (including sodium salts, methyl esters, etc.), thiocarbazil, thiobencarb, thiazimine, f -Methyl), desmedifam, desmetrine, tenylchlor, tebutam, tebuthiuron, tepraxidim, tefuroxyl to tefuryltrite Tembotrione, terbuthylazine, terbutryn, terbumeton, topramison, trakoxydim, triaziflam, triaziflam -Allate), trietazine, triclopyr, triclopyr-butotyl, trifludioxazin, tritosulfuron, tritosulfuron Methyl (triflusulfuron-methyl), trifluralin (trifluoxysulfuron-sodium), tribenuron-methyl, tripyralate (sodium salt), tolupyralate (sodium salt) ), Naproanilide, napropamide, napropamide-M, neburon, norflurazon, verhalate, paraquat (x), paraquat (x), paraquat (x). thyl), haloxy hop, haloxy hop-P, haloxy hop-ethyl, halosulfuron-methyl, icone, p ), Bispyribac-sodium, pinoxaden, bifenox, piperophos, pyraclonil, pyrasulfotole, pyrazoxyl, pyrazoxyl Ethyl (pyrazosulfuron-ethyl), pyrazolinate (pyrazolynate), biranafos (pyraflufen-ethyl), pyridafolidyl (pyrithiofirid) , Piributicalb, pyribenzoxim, pyrimisulfan, pyriminobac-methyl, piroxsuram, phenisofam phen nuroxa, phenoxasulfone, fenoxaprop-P-ethyl, fenquinotrione, fenthiaprop-ethyl, fentrazamide, fentrazamide Femmedipham, foramsulfuron, butachlor, butafenacil, butamifos, butyrate, butenaclor, rothalbyl Flasulfuron, flampprop (including methyl, ethyl, isopropyl ester), flampprop-M (including methyl, ethyl, isopropyl ester), fluazifop butyl (flaa)
zifop-butyl), fluazifop-P-butyl, fluazolate, fluometuron, fluoroglycofen-ethyl, flucarbazone sodium salt, flucarbarone sodium salt (Fluchloralin), flucetosulfuron, fluthiacet-methyl, flupirsulfuron-methyl-sodium, flufenacet, flufenacet ethyl, flupropanate, flupoxam, flumioxazine, flumicror-pentyl, flumetrone, fluridone, fluridone, fluridone ), Flurochloridone, pretilachlor, procarbazone sodium salt (procarbazone-sodium), prodiamine, prosulfocarb, propofazop Pacrol, propazine, propanil, propyzamide, propisochlor, propisulfuron, prophazole, prophazole, prophazole Sodium salt (propoxycarbazone-sodium), proxoxydim (broxodidim), bromacil, brompyrazon, promethrin (promethon), promethon (promethon), butyoxynyl bromoxynyl (broxynoic acid) ), Bromophenoxime, bromobutide, floraslam, petoxamide, benazoline, penoxslam, penoxslamm, peptoxam (Pebulate), bencarbazone, pendimethalin, benzfendizone, benzulide, bensulfuron-methyl, benzobicyclon (benzozyl) lon), benzofenap, bentazone, pentanochlor, pentoxazone, benfluralin, benfuresate, fosamine, fosamine, fosamine ) (Including salts of sodium, potassium, isopropylamine, triethanolamine, dimethylamine, etc.), mecoprop-P-potassium, mesosulfuron-methyl, mesotrione, Metazachlor (metazachlo) ), Metazosulfuron, metabenzthiazuron, metamitron, metamihop, metiotron, methyzoline, methitron, methyzoline, methitron ), Metobenzuron, Metochlorol, Metribuzin, Mefenacet, Monolinuron, Molinate, Iodosulfurfur on), iodosulfuron-methyl-sodium, iofensulfuron, iofensulfuron-sodium, lactofen, linuron, rensilon 2,3,6-TBA (2,3,6-trichlorobenzoic acid), 2,4,5-T (2,4,5-trichlorophenoxyacetic acid), 2,4-D (2,4-dichloro) Phenoxyacetic acid) (including salts such as amine, diethylamine, triethanolamine, isopropylamine, sodium or lithium), 2,4-DB (4- (2,4-dichlorophenoxy) butyric acid), AE-F-150944 ( Co No.), DNOC (4,6-dinitro-O-cresol) (including salts such as amine or sodium), EPTC (S-ethyldipropylthiocarbamate), MCPA (2-methyl-4-chlorophenoxyacetic acid) MCPA-thioethyl (MCPA-thioethyl), MCPB (2-methyl-4-chlorophenoxybutyric acid) (including sodium salt, ethyl ester, etc.), SYP-298 (code number), SYP-300 (code number), S -S-metolachlor, TCA (2,2,2-trichloroacetic acid) (including salts such as sodium, calcium or ammonia).

Insecticidal active ingredient:
Acrinathrin, Azadirachtin, Azamethiphos, Azinphos-ethyl, Azenosylcetin, Acequinocylole (Acephate), azocyclotin, abamectin, afidopyropen, amidoflumet, amitraz, alanib, alicalb, aldib Aldoxycarb, allethrin [including d-cis-trans-form, d-trans-form], isazophos, isamidophos, isocarbophos, isoxathion methyl, isoxathion methyl, isoxathion (Isofenphos-methyl), isoprocarb, ivermectin, imicyafos, imidacloprid, imiprothrin, indoxacarb, indoxacarb offencarb, ethifotin, etemoforthos, etemoforthos, etemoforthos Endosulfan, empentrin, oxamyl, oxydemethon-methyl, oxydeprofos, omethoate, cadsafosto (Kappa-tefluthrin), kappa-bifenthrin, karangjin, cartap, carbaryl, carbosulfan, carbofuran (HC) ), Xylylcarb, quinalphos, quinoprene, quinomethionate, coumafos, cryolite, lothianzine, rothenidin, crotiandin ide), chlorantraniliprole, chlorethoxyphos, chlordane, chloropicrin, chlorpyrifos, chlorpyrifos, chloropyrifos, chloropyrifos, chloropyrifos, chloropyrifos Vinfenfos, chlorfluazuron, chlormefos, cyanophos, diafenthiuron, diamidafos, cyantraniprole (cyan) traniliprole, dienochlor, cenopyrafen, dioxabenphos, diphenolan, cyclaniprole, diclotophos, dicrotophos, , Dichlorvos, dichloromezothiaz, 1,3-dichloropropene, dicofol, dicyclanil, disulfoton, dinote Dinotefuran, dinobuton, cyhalothrin [including gamma-form, lambda-form], cyphenothrin [including (1R) -trans-form], cyfluthrin [cyfluthrin [cyfluthrin] Diflubenzuron, cyflumetofen, diflovidazin, cyhexatin, cypermethrin [alpha-form, beta-form, theta-form, zeta-form, theta-form, zeta-form, theta-form, zeta-form, theta-form, zeta-form. Dimethylvinphos, dimethylfluthrin , Dimethoate, silafluofen, cyromazine, spinetoram, spinosad, spirodicrofen, spirotetraspirosulfuron (Sulcofuron-sodium), sulfluramide, sulfoxafluor, sulfotep, diazinon, thiacloprid, thiamethoxam, thiamethoxam zafen), thiodicarb, thiocyclam, thiosultap, thionazine, thiophanox, thiomethone, dichlortetraphos, tetrochortetraphos Tetroliliprole, tetramethylfluthrin, tetramethrin, tebupyrimfos, tebufenozide, tebufenpyrthful , Teflubenzuron, demeton-S-methyl, temefos, deltamethrin, terbufos, tralomethrin, trafluthrin (t), transfluthrin (t) , Triazophos, trichlorfon, triflumuron, triflumezopyrim, trimetacarb, tolfenpyrad, tolfenpyradam am), novaluron, noviflumuron, verticillium lecanii, hydroprene, pasteuria tranion, pastathione, bamidion Methyl (parathion-methyl), Halfenprox, Halofenozide, Bioallethrin, Bioarethrin S-cyclopentenyl thiylenethylene (biethylenethrin), Biolethrin S-cyclopentenyl ), Bistrifluron, hydramethylnon, bifenazate, bifenthrin, piflubumide, piperonylpyritol (Pyrafluprole), pyridafenthion, pyridaben, pyridalyl, pyrifluquinazone, pyriprolele, pyriprofen, pyriproxyl Pirimicarb, pyrimidifene, pyriminostrobin, pirimiphos-methyl, pyrethrin, famkin, fepronil, fepronil, fepronil ), Fenitrothion, phenoxycarb, phenothiocarb, phenothrin [including (1R) -trans-form], fenobucarb, phenthion, fention, fention thiovalate, fenvalerate, fenpyroximate, fenbutatin oxide, fenpropatrinin, fofofos, carboxysulfuryl fluoride , Butoxycarboxim, buprofezin, furathiocarb, praretrin, fluacrylpyrim, fluazuluon, fluazuron Sodium oloacetate, flucycloxuron, flucytrinate, flusulfamide, fluvalinate [including tau-form], flupiradifluon ), Flufiprole, flufenerim, fluphenoxystrobin, flufenoxuron, fluhexafon, flubenamidef, flubenamide f umethrin, prothiofos, protrifenbut, flonicamid, propofos, propargite, profenofos, rofurofrifos , Propoxur, flometoquin, bromopropylate, hexathiazox, hexaflumuron, pequilomyces pacificomyces ipes), Pecilomyces fumosoroseus, heptafluthrin, heptenophos, permethrin, benclothiaz, benclothiaz, benclothiaz, benclothiaz ), Benfuracarb, beauveria tenella, beauberia bassiana, beauberia bronnia (ph), p. hosalone, phosthiazate, phosthietan, phosphamidon, phosmet, polyactinates, formatenate, methalin, ect. Mecarbam, mesulfenfos, mesoprene, mesomyl, metaflumizone, methamidophos, methamofhem, methiocarb Methidone, methyl isothiocyanate, methyl bromide, methoxychlor, methoxyphenozide, metrin, methrin, methrin, methrin, methrin, methrin, methrin Mevinphos, meperfluthrin, monacrosporium phymatophagum, monocrotophos, momfluorosulin hrin, Little A (Little-A), Little A (Little-B), Aluminum Phosphide, Zinc Phosphide, Phosphine, Lufenuron, Rescalure ), Resmethrin, repimectin, rotenone, fenbutatin oxide, calcium cyanide, nicotine sulfate, (Z) -11-tetradecenyl, -11-hexadecenal, (Z) -11-hexadecenyl acetate, (Z) -9 12-tetradecadienyl acetate, (Z) -9-tetradecen-1-ol, (Z, E) -9,11-tetradecadienyl acetate, (Z, E) -9,12-tetradeca Dienyl-acetate, Bacillus popilliae, Bacillus subtilis, Bacillus sphaericus, Bacillus thuringiensis sub-is sul Aizawai), Bacillus thuringiensis subsp. Islaelensis, Bacillus thuringiensis subsp. Kurstakis, B. burs. thuringiensis subsp. , DDT (1,1, 1-trichloro-2,2-bis (4-chlorophenyl) ethane), DEP (dimethyl-2,2,2-trichloro-1-hydroxyethylphosphonate), DNOC (4,6-dinitro-o-cresol), DSP (O, O-diethyl-O- [4- (dimethylsulfamoyl) phenyl] phosphorothioate), EPN (O-ethyl O- (4-nitrophenyl) phenylphosphonothioate), nuclear polyhedrosis virus Embedded body, NA-85 (code number), NA-89 (code number), NC-515 (code number), RU15525 (code number), ZDI-2501 (code number), XMC, Z-13-Icocene- 10-on, ZXI8901 (code number), ME5382.

Bactericidal active ingredient:
Azaconazole, acibenzolar-S-methyl, azoxystrobin, anilazine, amisulbisoyl, amethoctrazine , Isopyrazam, isofetamid, isoprothiolane, ipconazole, iprodione, iprovalicas, iprobenizar, iprobenfos il), iminoctadine-tribesate, iminoctaine acetate, imibenconazole, ethifenfos, ethaconazole, ethaconazol ), Ethoxyquin, etridiazole, enestroburin, enoxastrobin, epoxiconazole, organic oils, x dixyl), oxazinylazole, oxathiapiproline, oxycarboxin, copper oxyquinoline, oxytetracycline oxaloxylinepoxide, oxytetracycline oxalinepoxide -Fumarate, oxolinic acid, copper octanoate, octilinone, offrase, oryastrobine, ugaphenylphenol (o-phenyphenol), gaspomycin, gacin Hall (captafol), carpropamide (carbendazim), carboxin (carboxin), carbonone (carvone), quinoxyfen (quinoxene), cinomethionate (c) quintozine, guazatine, cufuraneb, cuoxystrobin, cresoxime-methyl, clozilacone, chlozolinate, chlozolinate il), chloroneb, cyazofamid, diethofencarb, diclocymet, diclofluanid, diclomezine, diclolanzine , Diniconazole, diniconazole-M, dineb, dinocap, dipymethitrone, diphenylamine, diphenoconazole, difenoconazole Flufenamide (cyflufenamid), diflumetrim, cyproconazole, cyprodinil (cyprodinil), simeconazole, dimethyldisulfide (dimethimol), dimethyldisulfide Xylostrobin, ziram, silthiofam, streptomycin, spiroxamine, sedaxane, zoxamide, Zomet, thiadinil, thiabendazole, thiuram, thiophanate, thiophanate-methyl, thioflumate, teflumide, c Conazole, debacarb, tebuconazole, tebufloquin, terbinafine, dodine, didemorph, diol, torconol Triadimethon, triazoxide, trichlamide, triclopyrcarb, tricyclole, triticolazole, triticonazole, triticonazole, triticonazole, triticonazole, triticonazole, triticonazole (Trifloxystrobin), trifoline, tolylfluanid, tolclofos-methyl, tolnifanide, tolprocarbna, navamnab namycin, naphthifine, nitrapyrin, nitrothal-isopropyl, nuarimol, copper nonylphenol sulphonate sulphate 713), validamycin, varifenate, picarbutrazox, bixafen, picoxystrobin, bittertanol, binapalol cryl), biphenyl, piperalin, hymezazole, pyroxystrobin, pyracrostrobin, pyraziflumoid, pyrazoflumid, pyrazoflumid, pyrazoflumid Pyriophenone, pyrisoxazole, pyrifenox, pyributicalcarb, pyribencarb, pyrimethanil, piromethanil, piromethanil nclozolin, ferbam, famoxadone, phenazine oxide, fenamidone, fenaminestrobin, fenilmol, fenimole, z ), Fenpyrazamine, fenbuconazole, fenfuram, fenpropidin, fenpropimorph, fenhexamid, phorpemidid. Folpet, phthalide, bupirimate, fuberidazole, blasticidin-S, furametopyr, furaxyl, furaxyl, furaxyl (Fluazinam), fluoxastrobin, fluopicolide, fluopyram, fluorimide, fluxapiroxad, fluquinconazole (flucoconazole) ole), fluconazole-cis, fludioxonil, flusilazole, flusulfamide, fluthianil, flutolanol flu, flutrianol flu ), Flumetover, fluromorph, proquinazid, prochloraz, procymidone, prothiocarb, prothioconazole, prothioconazole on Bronopol, propamocarb-hydrochloride, propiconazole, propinebole, probenazole (probenazole), bromconazole (z), bromconazole (z). Benalaxyl-M, benodanyl, benomyl, pefurazoate, penconazole, pencyclon, benzobindiflupyr (benzyl) hizole, Benchavaricarb-isopropyl, penthiopyrad, penflufen, boscalid, fosetyl, polycium, polycium, polycium polycarbamate, Bordeaux liquid, mancozeb, mandipropamide, mandestrobin, manneb, microbutanil, mycrobutilmin Rudiomycin, methasulfocarb, metham, metalaxyl, metalaxyl-M, methylram
, Metconazole, metminostrobin, metraphenone, mepanipyrim, meptyldinocap, mepronil, mepronil, mepronil, mepronil Salt (phosphorous acid and salts), basic copper chloride (silver oxide), silver (silver), cuprous oxide, copper hydroxide (potassium carbonate), potassium hydrogen carbonate (potassium carbonate) Sodium hydrogen (sodium bicar) onate, sulfur, oxyquinoline sulfate, copper sulfate, (3,4-dichloroisothiazol-5-yl) methyl 4- (tert-butyl) benzoate (chemical name) CAS registration number: 1231214-23-5), 3-((3,4-dichloroisothiazol-5-yl) methoxy) benzo [d] isothiazole-1,1-dioxide (chemical name, CAS registration number: 957144-77-3), BAF-045 (code number), BAG-010 (code number), DBEDC (bisdecylbenzenesulfonic acid bisethylenediamine copper complex [II]), MIF-1002 (code number), TPTA (triacetate) Phenyltin), TPTC (triphenylthio) Chloride), TPTH (triphenyltin hydroxide), non-pathogenic Erbinia carotobola.

Plant growth regulating active ingredients:
1-naphthylacetamide, 1-methylcyclopropene, 1,6-diisopropylnaphthalene, 4-CPA (4-chlorophenoxyacetic acid), 4-oxo- 4- (2-phenylethyl) aminobutyric acid (chemical name, CAS registry number: 1083-55-2), aviglycine, ancymidol, inabenfide, indole acetic acid, Indole butyric acid, uniconazole, uniconazole-P (uniconaz) ole-P), ethiclozate, ethephone, epocholeone, carbonone, cloxyphonac, cloxiphonac potassium salt (cloxyphonac) Chlormequat, cytokinins, cyclanilide, dikeglucac, gibberellins, dimethipin, dithipine, zitofen, sintofen, sintofen N-decanol, triacontanol, trinexapac-ethyl, paclobutrazol, flumetralin, flurprimolol, relunol Prohydrojasmon, prohexadione-calcium, benzylaminopurine, forchlorfenuron, maleic hydrazide, maleic hydrazide de), mefluidide, calcium peroxide.

  Moreover, although the example of the safeguard component which can be mix | blended is described below, this invention is not limited to these safeguard components.

Chemical damage-reducing ingredients:
AD-67 (4-dichloroacetyl-1-oxa-4-azaspiro [4.5] decane), DKA-24 (N1, N2-diallyl-N2-dichloroacetylglycinamide), MG-191 (2-dichloromethyl) -2-methyl-1,3-dioxane), MON 4660 (code number), N- (2-methoxybenzoyl) -4-[(methylaminocarbonyl) amino] benzenesulfonamide (chemical name, CAS registry number: 129531-) 12-0), PPG-1292 (2,2-dichloro-N- (1,3-dioxan-2-ylmethyl) -N- (2-propenyl) acetamide), R-29148 (3-dichloroacetyl-2, 2,5-trimethyl-1,3-oxazolidine), TI-35 (code number), isoxadifen n), isoxadifen-ethyl, oxabetrinil, cloquintet-mexyl, thiomethrinil, dichlormone, dicyclonone, dicyclonone , Naphthalic anhydride (1,8-Naphtalic Anhydride), fenchlorazole-ethyl, fenchlorim, furilazole, fluxofenimol, bluzolol Acor), mefenpyr (mefenpyr), mefenpyr-ethyl (mefenpyr-ethyl), mefenpyr - diethyl (mefenpyr-diethyl), lower alkyl-substituted benzoic acids.

Although the manufacturing method of the agricultural chemical composition for treating foliage of the present invention is not particularly limited, the following method is usually used.
(1) Add and knead an appropriate amount of water to a mixture of Piroxasulfone and other raw materials microencapsulated with polyurethane and / or polyurea, and then extrude and granulate from a screen with holes of a certain size. How to dry.
(2) A method in which Piroxasulfone and other raw materials microencapsulated with polyurethane and / or polyurea are mixed with water or an appropriate solvent and uniformly suspended.
(3) A method in which pyroxasulfone microencapsulated with polyurethane and / or polyurea is mixed with an appropriate carrier, dried and then mixed with other raw materials.

In the agrochemical composition for foliage treatment of the present invention, pyroxasulfone is sufficiently concealed immediately after the foliage treatment, and this concealment function disappears rapidly with time. The confirmation of such performance may be evaluated by the following method. That is, when a predetermined amount of the test composition was poured into water at 20 ° C., and the pyroxasulfone concentration K ₁ after 1 hour in water and the pyroxasulfone concentration K ₂₄ after 24 hours were measured, _{If 1} is 55% or less of the water solubility of Piroxasulfone, K ₂₄ is 2 times or less of the water solubility of Piroxasulfone, and K ₁ is sufficiently lower than K ₂₄ , the foliage treatment of the present invention The agricultural chemical composition for use is preferable for achieving the desired effect. In the agrochemical composition for foliage treatment of the present invention, K ₁ is usually 55% or less of K ₂₄ , preferably 40% or less, and more preferably 30% or less.

  The method for spraying the foliage treatment pesticide composition of the present invention described above to the field where the cultivated crops in the growing season are grown is not particularly limited, and may be carried out in accordance with the conventional method according to the dosage form of the composition. That's fine. Cultivated crops include wheat, barley, rye, corn, sorghum, soybean, rapeseed, safflower, sunflower, flax, peanut, sesame, potato, sweet potato, onion, garlic, sugar beet, cotton, mint, sugarcane, cassava and shiba It is done.

  EXAMPLES Hereinafter, although an Example and a test example demonstrate this invention in detail, this invention is not restrict | limited at all by these Examples. In the following examples, “part” represents part by mass, and “%” represents mass%.

Example 1
6.40 parts of a mixture of 4,4′-diphenylmethane diisocyanate and 2,6-tolylene diisocyanate (trade name “Coronate 1021” manufactured by Tosoh Corporation), phenylxylylethane (trade name “Hysol SAS- 296 ") 8.15 parts of pyroxasulfone is added to a solution obtained by suspending and dissolving 8.00 parts of a 1% polyvinyl alcohol aqueous solution (77.15 parts), and a dissolver (product name" TK Robotics ", manufactured by Primics) The same) at a rotational speed of 2000 rpm for 10 minutes. Next, 0.30 part of dimethylpolysiloxane was added to the mixed solution, and then gently agitated at 60 ° C. for 3 hours, so that microureas containing piroxasulfone-containing pesticide for foliar treatment in which polyurea is a concealing substance. A composition was obtained. This composition was a spherical particle having a pyroxasulfone concentration of 8.19% by mass and an average particle size of 35.69 μm.

Example 2
A mixture of 4,4′-diphenylmethane diisocyanate and 2,6-tolylene diisocyanate (trade name “Coronate 1021” manufactured by Tosoh Corporation), 6.00 parts of phenylxylylethane (manufactured by Nippon Petrochemical Co., Ltd., trade name “Hysol SAS- 296 ") 15.29 parts of pyroxasulfone was added to a solution obtained by suspending and dissolving 15.00 parts, 63.41 parts of a 1% polyvinyl alcohol aqueous solution, and stirred with a dissolver at a rotational speed of 2000 rpm for 10 minutes. Next, 0.30 part of dimethylpolysiloxane was added to the mixed solution, and then gently agitated at 60 ° C. for 3 hours, so that microureas containing piroxasulfone-containing pesticide for foliar treatment in which polyurea is a concealing substance. A composition was obtained. This composition was a spherical particle having a pyroxasulfone concentration of 15.71% by mass and an average particle size of 32.78 μm.

Example 3
5.00 parts of a mixture of 4,4′-diphenylmethane diisocyanate and 2,6-tolylene diisocyanate (trade name “Coronate 1021”, manufactured by Tosoh Corporation), phenylxylylethane (manufactured by Shin Nippon Petrochemical Co., Ltd., trade name “Hisol SAS- 296 ") 10.19 parts of pyroxasulfone was added to a solution obtained by suspending and dissolving 10.00 parts, 74.51 parts of a 1% polyvinyl alcohol aqueous solution, and stirred with a dissolver at a rotational speed of 2000 rpm for 10 minutes. Next, 0.30 part of dimethylpolysiloxane was added to the mixed solution, and then gently agitated at 60 ° C. for 3 hours, so that microureas containing piroxasulfone-containing pesticide for foliar treatment in which polyurea is a concealing substance. A composition was obtained. This composition was a spherical particle having a pyroxasulfone concentration of 10.89% by mass and an average particle diameter of 37.93 μm.

Example 4
A mixture of 4,4′-diphenylmethane diisocyanate and 2,6-tolylene diisocyanate (trade name “Coronate 1021” manufactured by Tosoh Corporation), 6.00 parts of phenylxylylethane (manufactured by Nippon Petrochemical Co., Ltd., trade name “Hysol SAS- 296 ") 20.38 parts of pyroxasulfone was added to a solution obtained by suspending and dissolving 20.00 parts of a 1% polyvinyl alcohol aqueous solution 53.32 parts, and the mixture was stirred with a dissolver at a rotational speed of 2000 rpm for 10 minutes. Next, 0.30 part of dimethylpolysiloxane was added to the mixed solution, and then gently agitated at 60 ° C. for 3 hours, so that microureas containing piroxasulfone-containing pesticide for foliar treatment in which polyurea is a concealing substance. A composition was obtained. This composition was a spherical particle having a pyroxasulfone concentration of 20.74% by mass and an average particle diameter of 32.63 μm.

Example 5
4.00 parts of a mixture of 4,4′-diphenylmethane diisocyanate and 2,6-tolylene diisocyanate (trade name “Coronate 1021” manufactured by Tosoh Corporation), phenylxylylethane (trade name “Hysol SAS- 296 ") 15.29 parts of pyroxasulfone was added to a solution obtained by suspending and dissolving 15.00 parts, 65.41 parts of a 1% polyvinyl alcohol aqueous solution, and stirred with a dissolver at a rotational speed of 2000 rpm for 10 minutes. Next, 0.30 part of dimethylpolysiloxane was added to the mixed solution, and then gently agitated at 60 ° C. for 3 hours, so that microureas containing piroxasulfone-containing pesticide for foliar treatment in which polyurea is a concealing substance. A composition was obtained. This composition was a spherical particle having a pyroxasulfone concentration of 15.54% by mass and an average particle size of 24.00 μm.

Example 6
9,4 parts of 4,4′-diphenylmethane diisocyanate (trade name “Coronate 1130” manufactured by Tosoh Corporation), 7.00 parts of phenylxylylethane (trade name “Hysol SAS-296” manufactured by Shin Nippon Petrochemical Co., Ltd.), 1% To a solution obtained by suspending and dissolving 76.47 parts of an aqueous polyvinyl alcohol solution, 7.13 parts of pyroxasulfone was added and stirred with a dissolver at a rotational speed of 3000 rpm for 10 minutes. Next, 0.30 part of dimethylpolysiloxane was added to the mixed solution, and then gently agitated at 60 ° C. for 3 hours, so that microureas containing piroxasulfone-containing pesticide for foliar treatment in which polyurea is a concealing substance. A composition was obtained. This composition was a spherical particle having a pyroxasulfone concentration of 7.13% by mass and an average particle size of 30.62 μm.

Comparative Example 1
12.50 parts of polymethylene polyphenyl polyisocyanate (trade name “Millionate MR-100” manufactured by Tosoh Corporation), 5.00 parts of phenylxylylethane (trade name “Hysol SAS-296” manufactured by Shin Nippon Petrochemical Co., Ltd.), 1 To a solution obtained by suspending and dissolving 77.50 parts of a% polyvinyl alcohol aqueous solution, 5.00 parts of pyroxasulfone was added and stirred with a dissolver at a rotational speed of 6000 rpm for 10 minutes. Next, 0.30 part of dimethylpolysiloxane was added to the mixed solution, and then gently agitated at 60 ° C. for 3 hours, so that microureas containing piroxasulfone-containing pesticide for foliar treatment in which polyurea is a concealing substance. A composition was obtained. This composition was a spherical particle having a pyroxasulfone concentration of 5.50% by mass and an average particle size of 20.57 μm.

(Test Example 1: Evaluation test of phytotoxicity to soybean by foliage treatment)
Field pots were filled in plastic pots each having a length, width and depth of 11 cm, and soybean seeds were sown to cover the soil. Thereafter, the soybean was grown, and when the soybean reached the two-leaf development stage of the main leaf, the amount of pyroxasulfone per hectare of the agrochemical composition for foliage treatment obtained in Examples 1, 2, 6 and Comparative Example 7 was increased. Weighed out to 420 g, diluted with water, and evenly sprayed the foliage from above the soybeans using a small sprayer with an amount of sprayed water of 200 liters per hectare. After that, it is grown in a greenhouse, and an observation survey is conducted 14 days after the treatment. The test group not treated with the drug is used as a control group, and the degree of phytotoxicity is evaluated by an index according to the criteria shown in Table 1. displayed. The results of the survey are shown in Table 2.

(Test Example 2: Herbicidal effect evaluation test on weeds by field soil treatment)
The field soil was filled in plastic pots each having a length, width and depth of 11 cm, and seeds of Inobiae were sown and covered. Thereafter, the pesticide composition for treating foliage obtained in Examples 1, 2, 6 and Comparative Example 7 was weighed so that the amount of pyroxasulfone per hectare was 50 g, diluted with water, and 200 liters per hectare. The amount of water sprayed was uniformly sprayed on the soil surface using a small sprayer. Thereafter, the plants were grown in a greenhouse and observed 18 days after the treatment. The test group not treated with the drug was used as a control group, and the degree of herbicidal effect was evaluated by an index according to the criteria shown in Table 1. Displayed in stages. The results of the survey are shown in Table 3.

(Test Example 3: Evaluation of phytotoxicity to cotton by foliar treatment)
The field soil was filled in plastic pots each having a length, width and depth of 11 cm, and seeds of cotton were sown to cover the soil. Thereafter, cotton was grown, and when the cotton reached the two-leaf development stage of the main leaf, the amount of pyroxasulfone per hectare of the agricultural chemical composition for treating foliage obtained in Examples 1, 2, 6 and Comparative Example 7 The sample was weighed to 89 g, diluted with water, and sprayed evenly on the cotton with a spray of 200 liters per hectare using a small sprayer. Thereafter, an observation survey was carried out 4 days after the treatment in a test zone that was grown in a greenhouse and not treated with a drug. In addition to investigating the growth inhibition degree from 0 to 100 in 101 stages (0 is no phytotoxicity, 100 is complete death), and evaluated as a 101 stage phytotoxicity index. The ratio of the 101 stage phytotoxicity index was calculated. The results of the survey are shown in Table 4.

(Test Example 7: Dissolution property test)
The amount of pyroxasulfone in the agricultural chemical composition for foliar treatment obtained in Examples 1, 2, 6 and Comparative Example 7 was added to a 50 mL glass screw tube containing 40 mL of distilled water, After shaking well, it was allowed to stand at 20 ° C. Water was sampled after 1 hour, 3 hours, 6 hours and 24 hours of standing, and the concentration of pyroxasulfone in water was measured by HPLC analysis. The results are shown in Table 5.

Claims (16)

  A pesticidal composition for treating foliage comprising Piroxasulfone and a concealing substance that conceals Piroxasulfone, the concealing substance comprising an aliphatic isocyanate aromatic isocyanate or both, and water-soluble active hydrogen Polyurethane and / or polyurea produced through reaction with a compound, and pyroxasulfone is microencapsulated with the polyurethane and / or polyurea so as not to cause adhesive damage to cultivated crops when spraying foliage. A pesticide composition for treating foliage.   The agrochemical composition for foliage treatment according to claim 1, wherein the aromatic isocyanate is a benzene ring direct-attached diisocyanate.   The agrochemical composition for foliage treatment according to claim 2, wherein the benzene ring-directly connected diisocyanate is tolylene diisocyanate.   The agrochemical composition for foliage treatment according to any one of claims 1 to 3, wherein the aromatic isocyanate is a monomeric aromatic diisocyanate.   The agrochemical composition for foliage treatment according to claim 4, wherein the monomeric aromatic diisocyanate is diphenylmethane diisocyanate.   The agrochemical composition for foliage treatment according to any one of claims 1 to 5, wherein pyroxasulfone is encapsulated or encapsulated in the polyurethane and / or polyurea wall material and microencapsulated.   The agrochemical composition for foliage treatment according to any one of claims 1 to 6, wherein the concealing substance has an average particle size of 150 µm or less.   The agrochemical composition for foliage treatment according to any one of claims 1 to 7, wherein a blending ratio of the concealing substance is 0.1 to 50 parts by mass with respect to 1 part by mass of pyroxasulfone.   Pyroxasulfone is microencapsulated with polyurethane and / or polyurea produced through the reaction of an isocyanate containing aliphatic isocyanate and / or aromatic isocyanate with a water-soluble active hydrogen-containing compound. Item 9. The agricultural chemical composition for foliage treatment according to any one of Items 1 to 8.   The agrochemical composition for foliage treatment according to any one of claims 1 to 9, wherein the dosage form is a powder, a granule, a wettable powder, a wettable granule, an aqueous suspension preparation or an oily suspension preparation. After switching on the predetermined amount of foliage treatment pesticidal composition to 20 ° C. water, when measuring the pyroxasulfone concentration K ₂₄ after pyroxasulfone concentration K ₁ after 1 hour and 24 hours in water, K ₁ Is less than 55% of the water solubility of Piroxasulfone, K ₂₄ is less than twice the water solubility of Piroxasulfone, and K ₁ is less than 55% of K ₂₄ The agrochemical composition for foliage treatment according to any one of claims 1 to 10.   The agrochemical composition for foliage treatment according to any one of claims 1 to 11, further comprising an agrochemical active ingredient other than pyroxasulfone.   A foliage treatment method comprising mixing and using the agrochemical composition for foliage treatment according to any one of claims 1 to 12 and an agrochemical active ingredient other than pyroxasulfone.   A method for controlling pests, comprising spraying the pesticide composition according to any one of claims 1 to 13 on a field where a cultivated crop in a growing season is grown.   The cultivated crop is wheat, barley, rye, corn, sorghum, soybean, rapeseed, safflower, sunflower, flax, peanut, sesame, potato, sweet potato, onion, garlic, sugar beet, cotton, mint, sugar cane, cassava or shiba, The control method according to claim 14. A method for controlling pests, comprising subjecting the agrochemical composition according to any one of claims 1 to 12 to foliage treatment on non-agricultural land.