JP2017039650A - 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 for foliage treatment, has a high safety property, and has a wide range of herbicidal spectrum.SOLUTION: An agrochemical composition for foliage treatment contains a pyroxasulfone having a volume-based particle diameter d (0.5) corresponding to 50% of a cumulative particle diameter of 100 μm or less, and a concealing substance concealing the pyroxasulfone, in which the concealing substance micro-encapsulates or covers 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 lands. The agrochemical composition for foliage treatment has the concealing substance which is a substance selected from polyurea, polyurethane, polyamide, ethyl cellulose, hydrogenated fats and oils, shellac and the like.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 treatment pesticide composition that has high safety and has a broad herbicidal spectrum, without causing phytotoxicity to cultivated crops when piroxasulfone is treated with foliage. That is.

  As a result of diligent research to solve this problem, the present inventors have made a structure in which pyroxasulfone is microencapsulated or covered with a concealing substance to prevent the exposure of pyroxasulfone, and concealing the pyroxasulfone by the concealing substance. It has been found that the above-mentioned problems can be solved by making it temporary, which is effective at the time of foliage spraying and then quickly lost, and the present invention has been completed.

That is, the present invention has the following contents.
(1) A foliage treatment comprising pyroxasulfone having a volume-based particle diameter d (0.5) corresponding to 50% of the cumulative particle diameter of crystal particles of 100 μm or less and a concealing substance that conceals the pyroxasulfone. An agrochemical composition for foliage treatment, characterized in that the concealing substance is microencapsulated or coated with the pyroxasulfone so as not to cause phytotoxicity to cultivated crops when foliage is sprayed. Agrochemical composition.
(2) Volume-based particles having a volume-based particle diameter d (0.1) corresponding to 10% of the cumulative particle diameter of crystal particles of 30 μm or less and corresponding to 90% of the cumulative particle diameter of pyroxasulfone. The agrochemical composition for foliage treatment according to (1), wherein the diameter d (0.9) is 500 μm or less.
(3) The agrochemical composition for foliage treatment according to (1) or (2), wherein crystal particles of pyroxasulfone are directly coated with the concealing substance.
(4) The agrochemical composition for foliage treatment according to (1) or (2), wherein pyroxasulfone is encapsulated in a wall material of the concealing substance and is microencapsulated.
(5) Piroki Sa volume median diameter X ₅₀ sulfonic directly coated with the concealed material particles or microcapsules particles is 500μm or less, wherein (1) to foliar treatment for agrochemical composition according to any one of (4) .
(6) The agrochemical composition for foliage treatment according to any one of (1) to (5), 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.
(7) The concealing substance is polyurea, polyurethane, polyamide, polyester, ethyl cellulose, poly (meth) acrylic acid copolymer, carnauba wax, montanic acid ester wax, hardened oils and fats, polylactic acid, gelatin, crosslinked melamine, polystyrene, The method according to any one of (1) to (6), wherein the copolymer is selected from the group consisting of polystyrene copolymer, wax, yeast cell wall, alginate, polyglycolic acid, polyethylene glycol copolymer, and shellac. Agrochemical composition for treating foliage.
(8) Pesticide for foliage treatment according to any one of (1) to (7), wherein the dosage form is powder, granule, wettable powder, wettable granule, aqueous suspension preparation or oil suspension preparation Composition.
(9) A predetermined amount of the agrochemical composition for foliar treatment was poured into water at 20 ° C., and then the oxa concentration K ₁ after 1 hour in water and the oxy concentration K ₂₄ after 24 hours were measured. Wherein K ₁ is 55% or less of the water solubility of Piroxasulfone and K ₂₄ is 200% or less, preferably 35 to 200% of the water solubility of Piroxasulfone, (1 ) Agrochemical composition for foliage treatment according to any one of (8) to (8).
(10) The agrochemical composition for foliage treatment according to any one of (1) to (9), further including an agrochemical active ingredient other than pyroxasulfone.
(11) The foliage treatment, wherein the agrochemical composition for foliage treatment according to any one of (1) to (10) and an agrochemical active ingredient other than pyroxasulfone are mixed and used. Method.
(12) A method for controlling pests, comprising spraying the foliage treatment pesticide composition according to any one of (1) to (10) above onto a field where a cultivated crop grows. .
(13) The cultivated crops are wheat, barley, rye, corn, sorghum, soybean, rapeseed, safflower, sunflower, flax, groundnut, sesame, potato, sweet potato, onion, garlic, sugar beet, cotton, mint, sugar cane, cassava and shiba The control method according to (12), wherein
(14) A method for controlling pests, comprising subjecting the agricultural chemical composition according to any one of (1) to (10) 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 “particle size” in the present invention is 0 in accordance with JIS Z 8825: 2013 (corresponding to particle size analysis—laser diffraction / scattering method / ISO 13320: 2009), and 1 in water as a dispersion medium. Means a particle size distribution obtained by converting the light scattering pattern measured as .33 on a volume basis.

  d (0.5) means the volume median diameter of crystal particles of pyroxasulfone. That is, d (0.5) means a volume-based particle diameter corresponding to 50% of the cumulative particle diameter of pyroxasulfone crystal particles.

  d (0.1) is a volume-based particle diameter corresponding to 10% of the cumulative particle diameter of pyroxasulfone crystal particles, and d (0.9) is 90% of the cumulative particle diameter of pyroxasulfone crystal particles. Means a volume-based particle diameter corresponding to.

  The pesticide composition for foliage treatment of the present invention is a pesticide composition for foliage treatment comprising piroxasulfone having d (0.5) of 100 μm or less and a concealing substance that conceals the pyroxasulfone, The concealing substance is characterized by having a structure that prevents the exposure of pyroxasulfone by microencapsulating or coating the pyroxasulfone so as not to cause phytotoxicity to cultivated crops when spraying foliage. Such an agrochemical composition for foliar treatment is, for example, a method in which crystal particles of pyroxasulfone are directly coated with a resin film, or a method in which pyroxasulfone is encapsulated in a resin wall material and microencapsulated. It can be manufactured by the method to do.

  Piroxasulfone used in the agrochemical composition for foliar treatment of the present invention has d (0.5) of 100 μm or less, preferably 50 μm or less, and more preferably 30 μm or less.

  Pyroxasulfone used in the agrochemical composition for foliar treatment of the present invention preferably has d (0.1) of 30 μm or less and d (0.9) of 500 μm or less. More preferably, d (0.1) is 5 μm or less and d (0.9) is 150 μm or less.

  As a concealing substance used in the agrochemical composition for treating foliage of the present invention, a known substance can be arbitrarily used. Specific examples of usable substances are described in Non-Patent Document 1, for example. In particular, polyurea, polyurethane, polyamide, polyester, ethyl cellulose, poly (meth) acrylic acid copolymer, carnauba wax, montanic acid ester wax, hardened oils and fats, polylactic acid, gelatin, crosslinked melamine, polystyrene, polystyrene copolymer , Wax, yeast cell wall, alginate, polyglycolic acid, polyethylene glycol copolymer, shellac are preferably used. The blending ratio of the pyroxasulfone concealing substance in the foliar treatment pesticide composition is not particularly limited, but is preferably 0.1 to 50 parts by mass with respect to 1 part by mass of pyroxasulfone. More preferably, it is 1-50 mass parts. 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 directly coating the crystal particles of pyroxasulfone with a resin film, for example, pyroxasulfone and a resin dissolved in a solvent that does not dissolve heat-melted or pyroxasulfone are mixed and cooled, and then the resin is cooled. The method of manufacturing by solidifying a kind is mentioned.

  The method may be performed in the presence of an auxiliary agent capable of imparting rubber elasticity such as silicone composite powder and silicone rubber powder, if desired.

  Examples of a method for encapsulating pyroxasulfone in a resin wall material and microencapsulating include, for example, a first reaction liquid containing crystalline pyroxasulfone, a hydrophobic polyisocyanate, and a volatile hydrophobic solvent. Is added to an aqueous solution containing a water-soluble polymer and a water-soluble active hydrogen-containing compound, and then stirred at a high speed and then heated to volatilize the hydrophobic solvent of the first liquid, Examples include a method of obtaining microcapsules encapsulating pyroxasulfone using polyurethane or polyurea as a wall material by reacting a hydrophobic polyisocyanate, the water-soluble polymer, and the water-soluble active hydrogen-containing compound.

  As another method, for example, a first reaction liquid containing crystalline crystalline oxasulfone, a hydrophobic polyisocyanate, and a nonvolatile hydrophobic solvent is added to an aqueous solution containing a water-soluble polymer and a water-soluble active hydrogen-containing compound. After charging the two reaction liquids, the mixture is stirred at a high speed and then heated to react the hydrophobic polyisocyanate, the water-soluble polymer, and the water-soluble active hydrogen-containing compound with polyurethane or polyurea as a wall material. A method for obtaining microcapsules encapsulating pyroxasulfone is mentioned.

  In the above method, in place of the method of adding crystalline state of pyroxasulfone to the first reaction solution, a first reaction solution comprising a hydrophobic polyisocyanate and a nonvolatile hydrophobic solvent, a water-soluble polymer and a water-soluble activity A second reaction liquid composed of an aqueous solution containing a hydrogen-containing compound may be mixed, and crystalline form of pyroxasulfone may be added to the liquid 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.

で表されるポリメチレンポリフェニルポリイソシアネートを挙げることができる。 In this case, as the hydrophobic polyisocyanate used in combination with pyroxasulfone in the first reaction solution, for example, aliphatic or aromatic diisocyanate, a dimerized product or a trimerized product thereof, or the following formula (I)

The polymethylene polyphenyl polyisocyanate represented by these can be mentioned.

  In the first reaction solution, the hydrophobic solvent for dissolving and suspending the pyroxasulfone and the hydrophobic polyisocyanate is not particularly limited. For example, ethyl ether, dioxane, ethylene glycol monoethyl ether, dipropyl Ethers such as ether, dibutyl ether and tetrahydrofuran, normal hydrocarbons such as normal paraffin, naphthene, isoparaffin, kerosene and mineral oil, aromatic carbonization such as benzene, toluene, xylene, solvent naphtha, alkylnaphthalene and phenylxylylethane Hydrogen, halogenated hydrocarbons such as dichloromethane, chloroform, carbon tetrachloride, ethyl acetate, diisopropyl phthalate, dibutyl phthalate, dioctyl phthalate, dimethyl adipate, diisobutyl adipate, adip Esters such as diisodecyl, 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.

  The reaction conditions of the first reaction liquid and the second reaction liquid depend on the selected hydrophobic polyisocyanate, hydrophobic solvent, and water-soluble polymer. For example, both were mixed while stirring at a high speed of 1000 to 10,000 rpm. Then, it is carried out by stirring 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 usage ratios of the hydrophobic polyisocyanate in the first reaction liquid as the reactant and the water-soluble active hydrogen-containing compound and the water-soluble polymer in the second reaction liquid are based on the reaction formulas for producing polyurethane or polyurea, respectively. , Determined stoichiometrically.

  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.

Thus obtained particles obtained by microencapsulating or coating the pyroxasulfone of the present invention with a concealing substance can have an average particle diameter (volume median diameter) X ₅₀ appropriately selected. The particle diameter is usually selected from the range of 500 μm or less, preferably 300 μm or less, and more preferably 100 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 treating foliage of the present invention may be a composition obtained by microencapsulating or coating pyroxasulfone with a concealing substance as it is, but the composition is usually used together with the above-mentioned additional components, for example, a wettable powder. , Powder, granule wettable powder, aqueous suspension preparation, oily suspension preparation, granule, jumbo agent, suspoemulsion or uniform diffusion preparation, etc. 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 together with pyroxasulfone in a concealing substance, encapsulated or covered, or in a configuration according to the composition of the present invention, separately from pyroxasulfone. You may mix | blend in the form enclosed, enclosed 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, isoxapron, isoxapron ), Ipfencarbazone, imazaquin, imazapic (including salts with amines, etc.), imazapyr (including salts such as isopropylamine), imazametabenz methyz methyz-methyl (imabine) ), Imazamox, imazetapill (i mazethapyr, imazosulfuron, indaziflam, indanofan, eulinazine-thyl, efromethyl, esprocarb, esprocarb. Ethidimuron, ethoxysulfuron, ethoxyphen-ethyl, etofumesate, ethobenzanid, endothal disodium salt m), oxadiazon, oxadiaargyl, oxadichromefone, oxyfluorfen, oryzalin, rothalben, olbensulfen Carbethylate-carbylate, carbbutamide, carbaloamide-quizalofop-ethyl-quinolop-P-ethyll, quizalofop-P-ethyll fop-P-tefuryl, quinoclamamine, quinclorac, quinmerac, cumyluron, clacyfos, glyphosate (sodium, isopropyl, amine, propyl) , Including salts such as dimethylamine or trimesium), glufosinate (including salts such as amine or sodium), glufosinate P-sodium, cletodim, clodinahop propargyl ( clodinafop-propargyl), clopyralid (clopyralid) , Clomazone, chloromethoxyphen, clomeprop, chloranthram-methyl, chloridaben, chlorimur, chlorimur chlorsulfuron, chlorthal-dimethyl, chlorthiamid, chlorphthalim, chlorflulenol-methyl, chlorprophrom, chlorprophrom lorbromuron, chloroxuron, chlorotoluuron, saflufenacil, cyanazine, cyanamide, diuronyl, diethylethyl (diethyethyl) , Isopropylamine, diglycolamine, salts such as sodium or lithium), cycloate, cycloxydim, diclosulam, cyclosulfamuron, cyclopyrimorate, dicyclo Diphenyl, diclohop-P-methyl, diclohop-methyl, dichlorprop, dichlorprop-P, diquat, diquat, diquat, diquat, diquat, diquat, diquat, diquat, diquat Dithiopyr, siduron, dinitramine, cinidone-ethyl, cinosulfuron, dinoterb, cyhalofop-b-diphen difenzoquat), diflufenican (di flufenican, diflufenzopyr, simazine, dimetachlor, dimetamethrin, dimethenamide, dimethenamide, dimethenamide and p (me). Dimethylfuron, cinmethylin, swep, sulcotrione, sulfentrazone, cetoxydim, terbacil, dimuron, daimuron apon), thiazopyr, thiafenacil, thiencarbazone (including sodium salts, methyl esters, etc.), thiocarbazil, thiobencarb, thiazimine, thiazimine -Methyl), desmedifam, desmetrine, tenylchlor, tebutam, tebuthiuron, tepraxidim, tefuroxyl to tefuryltrite Tribone -Allate), trietazine, triclopyr, triclopyr-butotyl, trifludioxazine, tritosulfuron, tritosulfuron Trimethyl (trifluuron-methyl), trifluralin, trifloxysulfuron-sodium, tribenuron-methyl, tolpyralate (tolypyramal) Salt), naproanilide, napropamide, napropamide-M, neburon, norflurazon, vernal, phenoxy, paraquat, h − ethyl, haloxyhop, haloxyhop-P, haloxyhop-ethyl, halosulfuron-methyl, icylopron, icylopyl ), Bispyribac-sodium, pinoxaden, bifenox, piperophos, pyraclonil, pyrasulfotole, pyrazoxole, pyrazoxyl Ethyl (pyrazosulfuron-ethyl), pyrazolynate (pyrazolynate), biranafos (pyranflufen-ethyl), pyridafol (pyridiofido) pyriftalid, pyributicalcarb, pyribenzoxim, pyrimisulfan, pyriminobac-methyl, piroxsulhum fenuron, fenoxasulfone, fenoxaprop-P-ethyl, fenquinotrione, fenthiaprop-ethyl, fentrazamide, fentrazamide Femmedipham, Foramsulfuron, Butachlor, Butafenacil, Butamifos, Butyrate, Butenachlor, Rothel, Burachin Iodosulfuron (Flazasulfuron), Fulham prop (flamprop) (methyl, ethyl, including isopropyl ester), Fulham prop · M (flamprop-M) (methyl, ethyl, including isopropyl ester), fluazifop-butyl (f
luazifop-butyl), fluazifop-P-butyl, fluazolate, fluometuron, fluoroglycofen-ethyl, flucarbazone sodium salt (Fluchloralin), flucetosulfuron, fluthiacet-methyl, flupirsulfuron-methyl-sodium, flufenacet, flufenacet, flufenacet yr-ethyl), flupropanate, flupoxam, flumioxazin, flumilacrac-pentyl, flumethrum, fluridone m (Fluroxypyr), flurochloridone, pretilachlor, procarbazone sodium salt (procarbazone-sodium), prodiamine, prosulfocarb (prosulfocarb), propofazop , Propachlor, propazine, propanil, propyzamide, propisochlor, propyrisulfuron, proflumol, proflumol Zon-sodium salt (propoxycarbazone-sodium), proxoxydim, bromacil, brompyrazon, promethrin, promethon, bromoxynyl (broxynyl) Terphene), bromophenoxim, bromobutide, floraslam, petoxamide, benzazoline, penoxsulamine, phenoxsulam , Pebrate, bencarbazone, pendimethalin, benzfendizone, benzulide, bensulfuron-methyl, benzobicyclon cyclon), benzofenap (benzofenap), bentazone (pentazolone), pentanochlor, pentoxazone (bentoxalone), benfluralin, benfuresate (feneme), fosamin (fomeme) ) (Including salts of sodium, potassium, isopropylamine, triethanolamine, dimethylamine, etc.), mecoprop-P-potassium, mesosulfuron-methyl, mesotrione, Metazachlor (metazac) lor), metazosulfuron (metazosulfuron), metabenzthiazuron (methabenzthiauron), metamitron (metamitron), methiozoline (methitomuron) Metobromuron, Metobenzuron, Metochlorol, Metribuzin, Mefenacet, Monolinuron, Molinate, Iodosulfuron (iodosulon) furon), iodosulfuron-methyl-sodium, iofensulfuron, iofensulfuron-sodium, lactofen, linsilon, linsilon, linsilon 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-15094 (Code number), 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-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.

Active ingredients that reduce phytotoxicity
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 pyroxasulfone and other raw materials microencapsulated or coated with a concealing substance, and then extrude and granulate from a screen with a hole of a certain size. How to dry.
(2) A method in which pyroxasulfone and other raw materials microencapsulated or coated with a concealing substance are mixed with water or a suitable solvent and uniformly suspended.
(3) A method in which pyroxasulfone microencapsulated or coated with a concealing substance 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, ₁ is 55% or less of the water solubility of pyroxasulfone (3.1 ppm in distilled water at 20 ° C.) and K ₂₄ is 200% or less of the water solubility of pyroxasulfone, preferably 35 to 200%. The pesticide composition for foliar treatment according to the present invention 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 50% or less, and more preferably 45% 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%.

  Table 1 shows the pyroxasulfone raw materials used in Examples and Comparative Examples. The particle size of each drug substance was measured with a laser diffraction particle size distribution analyzer LMS-2000e manufactured by Seishin Enterprise Co., Ltd.

The volume median diameter X ₅₀ of pyroxasulfone microencapsulated or coated composition concealing material were measured by Seishin Enterprise Co., Ltd. laser diffraction particle size distribution measuring device LMS-2000e.

Example 1
Piroxasulfone base (1) (d (0.5) = 4.27 μm) 1.00 parts shown in Table 1, polymethylene polyphenyl polyisocyanate (trade name “Millionate MR-100” manufactured by Tosoh Corporation) To a solution obtained by suspending and dissolving 00 parts in 15.00 parts of phenylxylylethane (trade name “Hysol SAS-296”, manufactured by Nippon Petrochemical Co., Ltd.), 100.00 parts of a 1% polyvinyl alcohol aqueous solution was added to a dissolver ( The product was stirred for 10 minutes at a rotational speed of 6000 rpm using a product manufactured by Primics, product name “TK Robotics” (hereinafter the same). 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 _{X 50} is a spherical particle of 5.24 m.

Example 2
Piroxasulfone base (1) (d (0.5) = 4.27 μm) 1.00 parts shown in Table 1, polymethylene polyphenyl polyisocyanate (trade name “Millionate MR-100” manufactured by Tosoh Corporation) 20. To a solution obtained by suspending and dissolving 00 parts in 15.00 parts of phenylxylyl ethane (manufactured by Nippon Petrochemicals, trade name “Hysol SAS-296”), 100.00 parts of 1% polyvinyl alcohol aqueous solution was added, and dissolved in a dissolver. The mixture was stirred for 10 minutes at a rotation speed of 6000 rpm. 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 _{X 50} is a spherical particle of 15.00Myuemu.

Example 3
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 77.10 parts of an aqueous polyvinyl alcohol solution, 5.10 parts of the pyroxasulfone raw material (1) (d (0.5) = 4.27 μm) shown in Table 1 was added, and the rotational speed was increased with a dissolver. Stir at 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 _{X 50} is a spherical particle of 20.57Myuemu.

Example 4
Rotating the dissolver instead of (1) (d (0.5) = 4.27 μm) to (18) (d (0.5) = 9.30 μm) shown in Table 1 Except that the speed was changed from 6000 rpm to 5500 rpm, it was produced in the same manner as in Example 3 to obtain a microencapsulated pyroxasulfone-containing agricultural chemical composition for foliage treatment in which polyurea was a concealing substance. This composition _{X 50} is a spherical particle of 21.89Myuemu.

Example 5
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 ") 8.00 parts, and 1% polyvinyl alcohol aqueous solution 77.15 parts suspended in a solution of Piroxasulfone original compound (18) shown in Table 1 (d (0.5) = 9.30 μm) 8. 15 parts were added and stirred with a dissolver at a rotational speed of 2300 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 _{X 50} is a spherical particle of 30.10Myuemu.

Example 6
A mixture of 4,4′-diphenylmethane diisocyanate and 2,6-tolylene diisocyanate (trade name “Coronate 1021”, manufactured by Tosoh Corporation), 6.00 parts, phenylxylylethane (manufactured by Shin Nippon Petrochemical Co., Ltd., trade name “Hysol SAS- 296 ") in a solution obtained by suspending 15.00 parts, 63.42 parts of a 1% polyvinyl alcohol aqueous solution, the Piroxasulfone original compound (18) shown in Table 1 (d (0.5) = 9.30 μm) 15. 28 parts were added and stirred with a dissolver at a rotational speed of 2300 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 _{X 50} is a spherical particle of 26.63Myuemu.

Example 7
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 the pyroxasulfone raw material (18) (d (0.5) = 9.30 μm) shown in Table 1 is added and rotated with a dissolver. Stir at a speed of 3500 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 _{X 50} is a spherical particle of 26.79Myuemu.

Example 8
Pyroxasulfone bulk material (20) (d (0.5) = 8.50 μm) shown in Table 1 is added to 76.92 parts, an aqueous urethane resin (Daiichi Kogyo Seiyaku, trade name “Superflex 500M” 25.64). Parts (urethane resin: 11.54 parts, water: 14.10 parts) and “Superflex 130” (32.97 parts (urethane resin: 11.54 parts, water: 21.43 parts)) were added and mixed. The mixed solution was spread uniformly over a 9 cm petri dish, and water was distilled off under reduced pressure using a vacuum desiccator. Next, the obtained mixture was pulverized using an agate pot and heated at 110 ° C. for 2 hours to obtain a piroxasulfone-containing pesticide treatment pesticide composition coated with a urethane resin as a concealing substance. This composition _{X 50} were amorphous particles 221.90Myuemu.

Example 9
In 66.67 parts of the pyroxasulfone base (20) (d (0.5) = 8.50 μm) shown in Table 1, an aqueous urethane resin (Daiichi Kogyo Seiyaku, trade name “Superflex 500M” 37.04) Parts (urethane resin: 16.67 parts, water: 20.37 parts) and 47.63 parts of “Superflex 130” (urethane resin: 16.67 parts, water: 30.96 parts) were added and mixed. The mixed solution was spread uniformly over a 9 cm petri dish, and water was distilled off under reduced pressure using a vacuum desiccator. Next, the obtained mixture was pulverized using an agate pot and heated at 110 ° C. for 2 hours to obtain a piroxasulfone-containing pesticide treatment pesticide composition coated with a urethane resin as a concealing substance. This composition _{X 50} were amorphous particles 162.08Myuemu.

Example 10
In 58.82 parts of the pyroxasulfone base (20) (d (0.5) = 8.50 μm) shown in Table 1, an aqueous urethane resin (Daiichi Kogyo Seiyaku, trade name “Superflex 500M” 45.76). Parts (urethane resin: 20.59 parts, water: 25.17 parts) and 58.83 parts of “Superflex 130” (urethane resin: 20.59 parts, water: 38.24 parts) were added and mixed. The liquid was spread evenly over a 9 cm petri dish, and water was distilled off under reduced pressure using a vacuum desiccator. It was obtained pyroxasulfone containing foliar treatment pesticidal composition coated with a urethane resin. the composition X ₅₀ were amorphous particles 312.57Myuemu.

Example 11
Pyroxasulfone raw material (20) (d (0.5) = 8.50 μm) shown in Table 1 was added to 83.33 parts, an aqueous urethane resin (Daiichi Kogyo Seiyaku, trade name “Superflex 500M” 18.53). Parts (urethane resin: 8.34 parts, water: 10.19 parts) and 23.83 parts of “Superflex 130” (urethane resin: 8.34 parts, water: 15.49 parts) were added and mixed. The mixed solution was spread uniformly over a 9 cm petri dish, and water was distilled off under reduced pressure using a vacuum desiccator. Next, the obtained mixture was pulverized using an agate pot and heated at 110 ° C. for 2 hours to obtain a piroxasulfone-containing pesticide treatment pesticide composition coated with a urethane resin as a concealing substance. This composition _{X 50} were amorphous particles 238.31Myuemu.

Example 12
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 ") 8.00 parts, and 1% polyvinyl alcohol aqueous solution 77.15 parts suspended in a solution of Piroxasulfone base (19) shown in Table 1 (d (0.5) = 11.33 μm) 8. 15 parts were added, and the mixture was stirred for 10 minutes at a rotational speed of 2300 rpm with a dissolver (manufactured by Primex, product name “TK Robotics”, the same applies hereinafter). 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 _{X 50} is a spherical particle of 23.16Myuemu.

Example 13
12.4 parts of 4,4′-diphenylmethane diisocyanate (trade name “Coronate 1130” 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 77.11 parts of an aqueous polyvinyl alcohol solution, 5.09 parts of the pyroxasulfone raw material (19) (d (0.5) = 11.33 μm) shown in Table 1 is added and rotated with a dissolver. Stir for 10 minutes at a speed of 4500 rpm. 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 _{X 50} is a spherical particle of 30.55Myuemu.

Example 14
10,4 parts of 4,4′-diphenylmethane diisocyanate (trade name “Coronate 1130” manufactured by Tosoh Corporation), 6.00 parts of phenylxylylethane (trade name “Hysol SAS-296” manufactured by Nippon Petrochemical Co., Ltd.), 1% To a solution obtained by suspending and dissolving 76.78 parts of an aqueous polyvinyl alcohol solution, 6.12 parts of the pyroxasulfone raw material (3) (d (0.5) = 12.73 μm) shown in Table 1 is added, and rotated with a dissolver. Stir at a speed of 3500 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 _{X 50} is a spherical particle of 32.75Myuemu.

Example 15
6.40 parts of polymethylene polyphenyl polyisocyanate (trade name “Millionate MR-100” manufactured by Tosoh Corporation), 8.00 parts of phenylxylylethane (trade name “Hysol SAS-296” manufactured by Shin Nippon Petrochemical Co., Ltd.), 1 To a solution obtained by suspending 77.15 parts of an aqueous polyvinyl alcohol solution, 8.15 parts of the pyroxasulfone raw material (3) (d (0.5) = 12.73 μm) shown in Table 1 was added, and the rotation speed was increased with a dissolver. Stir at 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 _{X 50} is a spherical particle of 32.72Myuemu.

Example 16
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 77.10 parts of an aqueous polyvinyl alcohol solution, 5.10 parts of the pyroxasulfone raw material (3) (d (0.5) = 12.73 μm) shown in Table 1 was added, and the rotation speed was increased with a dissolver. Stir at 5000 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 _{X 50} is a spherical particle of 31.31Myuemu.

Example 17
The pyroxasulfone raw material used was changed from (19) (d (0.5) = 11.33 μm) shown in Table 1 to (3) (d (0.5) = 12.73 μm). Except that the speed was changed from 2300 rpm to 2000 rpm, it was produced in the same manner as in Example 12, and a microencapsulated pyroxasulfone-containing agricultural chemical composition for foliage treatment in which polyurea was a concealing substance was obtained. This composition _{X 50} is a spherical particle of 35.69Myuemu.

Example 18
The pyroxasulfone raw material used was changed from (19) (d (0.5) = 11.33 μm) shown in Table 1 to (3) (d (0.5) = 12.73 μm). Except that the speed was changed from 4500 rpm to 4000 rpm, it was produced in the same manner as in Example 13 to obtain a microencapsulated pyroxasulfone-containing agricultural chemical composition for foliage treatment in which polyurea was a concealing substance. This composition _{X 50} is a spherical particle of 35.71Myuemu.

Example 19
A mixture of 4,4′-diphenylmethane diisocyanate and 2,6-tolylene diisocyanate (trade name “Coronate 1021”, manufactured by Tosoh Corporation), 6.00 parts, phenylxylylethane (manufactured by Shin Nippon Petrochemical Co., Ltd., trade name “Hysol SAS- 296 ") in a solution obtained by suspending 15.00 parts of a 1% polyvinyl alcohol aqueous solution (63.41 parts), the pyroxasulfone raw material (3) shown in Table 1 (d (0.5) = 12.73 μm). 29 parts were added 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 _{X 50} is a spherical particle of 32.78Myuemu.

Example 20
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 Piroxasulfone base (3) (d (0.5) = 12.73 μm) shown in Table 1 is added, and rotated with a dissolver. Stir at a 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 _{X 50} is a spherical particle of 30.62Myuemu.

Example 21
In 50.00 parts of the pyroxasulfone active ingredient (3) (d (0.5) = 12.73 μm) shown in Table 1, an aqueous urethane resin (manufactured by Daiichi Kogyo Seiyaku, trade name “Superflex 500M” 55.56). Parts (urethane resin: 25 parts, water: 30.56 parts) and 71.43 parts of “Superflex 130” (urethane resin: 25 parts, water: 46.43 parts) were added and mixed. The mixed solution was spread uniformly over a 9 cm petri dish, and water was distilled off under reduced pressure using a vacuum desiccator. Next, the obtained mixture was pulverized using an agate pot and heated at 110 ° C. for 2 hours to obtain a piroxasulfone-containing pesticide treatment pesticide composition coated with a urethane resin as a concealing substance. This composition _{X 50} were amorphous particles 345.00Myuemu.

Example 22
Pyroxasulfone base (3) (d (0.5) = 12.73 μm) 33.33 parts shown in Table 1 was added to an aqueous urethane resin (Daiichi Kogyo Seiyaku, trade name “Superflex 500M” 74.09). Parts (urethane resin: 33.34 parts, water: 40.75 parts) “Superflex 130” 95.26 parts (urethane resin: 33.34 parts, water: 61.92 parts) were added and mixed. The mixture was uniformly spread over a 9 cm petri dish, and water was distilled off under reduced pressure using a vacuum desiccator. It was obtained pyroxasulfone containing foliar treatment pesticidal composition coated with a resin. the composition X ₅₀ were amorphous particles 410.72Myuemu.

Example 23
Except that the Pyroxasulfone base used is changed from (3) (d (0.5) = 12.73 μm) to (21) (d (0.5) = 17.24 μm) shown in Table 1, Produced in the same manner as in Example 19, a microencapsulated pyroxasulfone-containing agricultural chemical composition for foliage treatment in which polyurea was a concealing substance was obtained. This composition _{X 50} is a spherical particle of 20.30Myuemu.

Example 24
Except that the pyroxasulfone base used is changed from (3) (d (0.5) = 12.73 μm) to (4) (d (0.5) = 20.95 μm) shown in Table 1, Produced in the same manner as in Example 16, a microencapsulated pyroxasulfone-containing pesticide composition for foliar treatment in which polyurea was a concealing substance was obtained. This composition _{X 50} is a spherical particle of 25.65Myuemu.

Example 25
The pyroxasulfone raw material to be used was changed from (3) (d (0.5) = 12.73 μm) to (9) (d (0.5) = 36.13 μm) shown in Table 1, and the rotation of the dissolver Except that the speed was changed from 5000 rpm to 3000 rpm, it was produced in the same manner as in Example 16 to obtain a microencapsulated pyroxasulfone-containing agricultural chemical composition for foliage treatment in which polyurea was a concealing substance. This composition _{X 50} is a spherical particle of 58.51Myuemu.

Comparative Example 1
In 50.00 parts of the pyroxasulfone raw material (16) (d (0.5) = 129.26 μm) shown in Table 1, an aqueous urethane resin (Daiichi Kogyo Seiyaku, trade name “Superflex 500M” 55.56). Parts (urethane resin: 25 parts, water: 30.56 parts) and 71.43 parts of “Superflex 130” (urethane resin: 25 parts, water: 46.43 parts) were added and mixed. The mixed solution was spread uniformly over a 9 cm petri dish, and water was distilled off under reduced pressure using a vacuum desiccator. Next, the obtained mixture was pulverized using an agate bowl and heated at 110 ° C. for 2 hours to obtain a piroxasulfone-containing pesticide treatment pesticide composition coated with a urethane resin as a concealing substance. This composition _{X 50} were amorphous particles 293.94Myuemu.

(Test Example 1: 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 agrochemical compositions for foliar treatment obtained in Examples 3, 16, 17, 18, 19, 20, and Comparative Example 1 were weighed out so that the amount of pyroxasulfone per hectare was 50 g, and diluted with water. It sprayed uniformly on the soil surface using a small sprayer with a spraying water volume of 200 liters per hectare. Thereafter, the plants were grown in a greenhouse, and an observation survey was conducted 22 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 2. Displayed in stages. The results of the survey are shown in Table 3.

(Test Example 2: Dissolution test)
The amount of pyroxasulfone in the agricultural chemical composition for foliar treatment obtained in Examples 1 to 25 and Comparative Example 1 was added to a 50 mL glass screw tube containing 40 mL of distilled water and shaken well. And then left 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 4.

Claims (14)

  Agrochemical composition for foliage treatment comprising pyroxasulfone having a volume-based particle diameter d (0.5) corresponding to 50% of the cumulative particle diameter of crystal particles of 100 μm or less and a concealing substance that conceals the pyroxasulfone. The pesticide composition is characterized by microcapsulating or coating the pyroxasulfone so that the concealing substance does not cause phytotoxicity to cultivated crops when foliage is sprayed.   The volume-based particle diameter d (0.1) corresponding to 10% of the cumulative particle diameter of the crystal particles is 30 μm or less, and the volume-based particle diameter d (90) corresponding to 90% of the pyroxasulfone cumulative particle diameter. The agrochemical composition for foliage treatment according to claim 1, wherein 0.9) is 500 μm or less.   The agrochemical composition for foliage treatment according to claim 1 or 2, wherein the crystal particles of pyroxasulfone are directly coated with the concealing substance.   The agrochemical composition for foliage treatment according to claim 1 or 2, wherein pyroxasulfone is encapsulated in a wall material of the concealing substance and encapsulated. Piroki Sa volume median diameter X ₅₀ sulfonic directly coated with the concealed material particles or microcapsules particles is 500μm or less, foliage treatment pesticidal composition of any one of claims 1 to 4.   The agrochemical composition for foliage treatment according to any one of claims 1 to 5, 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.   The concealing substance is polyurea, polyurethane, polyamide, polyester, ethyl cellulose, poly (meth) acrylic acid copolymer, carnauba wax, montanic acid ester wax, hardened oils and fats, polylactic acid, gelatin, crosslinked melamine, polystyrene, polystyrene copolymer. The agrochemical composition for foliage treatment according to any one of claims 1 to 6, which is selected from the group consisting of a polymer, wax, yeast cell wall, alginate, polyglycolic acid, polyethylene glycol copolymer and shellac. object.   The agrochemical composition for foliage treatment according to any one of claims 1 to 7, wherein the dosage form is a powder, a granule, a wettable powder, a wettable granule, an aqueous suspension preparation or an oily suspension preparation. When a predetermined amount of the pesticide composition for foliar treatment was poured into water at 20 ° C., the Piroxasulfone concentration K ₁ after 1 hour in water and the Piroxasulfone concentration K ₂₄ after 24 hours were measured. ₁ is not more than 55% of water solubility of pyroxasulfone _{and, K 24} of not more than 200% of the water solubility of pyroxasulfone and, said the _{K 1} is equal to or less than 55% of _{K 24} The agrochemical composition for foliage treatment according to any one of claims 1 to 8.   The agrochemical composition for foliage treatment according to any one of claims 1 to 9, further comprising an agrochemical active ingredient other than pyroxasulfone.   11. A foliage treatment method comprising mixing and using the agrochemical composition for foliage treatment according to claim 1 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 10 on a field where a cultivated crop in a growing season is grown.   The cultivated crops are wheat, barley, rye, corn, sorghum, soybean, rapeseed, safflower, sunflower, flax, peanut, sesame, potato, sweet potato, onion, garlic, sugar beet, cotton, mint, sugar cane, cassava and shiba. The control method according to claim 12. A method for controlling pests, comprising subjecting the agrochemical composition according to any one of claims 1 to 10 to foliage treatment on non-agricultural land.