JP2011157322A - Particulate agrochemical composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a particulate agrochemical composition producible by a simple production method, keeping good scattering property even under a high-temperature, high-humidity condition and suppressing falling-off of the agrochemical active component from a particulate carrier and scattering (drifting) of the solid preparation itself. <P>SOLUTION: There are provided the particulate agrochemical composition obtained by mixing (a) the agrochemical active component, (b) the particulate carrier, (c) a solid binder, (d) water and (e) a water-absorbing agent by chemical adsorption and having apparent specific gravity of 1.0-2.0, and a method for producing the particulate agrochemical composition comprising addition and mixing of (d) water to a powdery mixture of (a) the agrochemical active component, (b) the particulate carrier and (c) the solid binder which does not require a pretreatment process to form an aqueous solution or an aqueous dispersion, thereby bonding the agrochemical active component to the surface of the particulate carrier with the solid binder, and addition and mixing of (e) the water-absorbing agent by chemical adsorption to the bonded product to perform dehydration process. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is a solid preparation that is sprayed as it is using a spreader without being diluted with water, has a good sprayability in high temperature and high humidity conditions, and has a scattering (drift) during spraying The present invention relates to a suppressed fine agricultural chemical composition and a simple production method thereof.

  In recent years, when solid formulations are being sprayed, there is concern about scattering (drift) to the surrounding environment such as other crops and houses and exposure to farm workers. Fine-grained agricultural chemical compositions such as fine granules F (particle size distribution 180 μm to 710 μm), fine granules (particle size distribution 106 μm to 300 μm) and fine granules F (particle size distribution 63 μm to 212 μm) have been developed as few solid preparations I came. These fine granular pesticide compositions have been subjected to many studies exemplified below for the purpose of suppressing the peeling of the agricultural chemical active ingredients from the fine particulate carrier during spraying while maintaining the dispersibility comparable to DL powder. It was.

  In JP-A-49-13338 (Patent Document 1), (a) a non-absorbable or relatively non-absorbable mineral fine powder and (b) an active ingredient and vinyl acetate spread thereon. A grain composition for agricultural and horticultural use comprising a spreading layer containing a polymer or a copolymer, suppressing the peeling of the spreading layer during machine spraying, and further improving the fluidity at the time of ejection has been proposed. ing.

  In Japanese Patent Application Laid-Open No. 2003-12406 (Patent Document 2), a pesticide active ingredient that is liquid at normal temperature (excluding diazinon (generic name)), a solution obtained by dissolving a pesticide active ingredient that is solid at normal temperature in an organic solvent, or these By impregnating and adhering to a non-absorbent granular carrier together with a calcined ultrafine amorphous silicon dioxide having an equilibrium water content of 5% or less and an average particle size of 3 μm or less, There has been proposed an agrochemical granular composition that is free from dust and that hardly peels off an agrochemical active ingredient even when applied using a power spreader, and a simple method for producing the agrochemical granular composition.

  In Japanese Patent Application Laid-Open No. 2003-12423 (Patent Document 3), the general name diazinon is used as a non-oil-absorbing granular carrier together with calcined ultrafine amorphous silicon dioxide having an equilibrium water content of 5% or less and an average particle size of 3 microns or less. Impregnated pesticidal composition with improved fluidity, no powdering due to exfoliation, and almost no exfoliation of pesticidal active ingredients, etc. even when applied using a power spreader. A simple method for producing the composition has been proposed.

In JP 2009-84183 A (Patent Document 4), a method for producing a pesticide granule or a pesticide granule that performs at least the following (1) to (3) in a mixer (1) Mixing a carrier and a binder liquid Then, a binder layer is formed on the surface of the carrier.
(2) At least a pesticide active ingredient is fixed through the binder layer.
(3) A dehydrating desiccant (such as hemihydrate gypsum) is mixed and dried.
Has been proposed, and it is described that it is possible to produce an agrochemical granule or an agrochemical granule having a characteristic of less peeling and scattering of an agrochemical active ingredient without performing any hot air drying step.

However, the finely divided pesticide composition is generally sprayed in the summer when it becomes hot and humid, and must be stored under high-temperature and humid conditions until it is sprayed. When stored under such conditions, the decrease in fluidity due to moisture absorption of the finely divided pesticide composition causes poor spraying, which places a load on the spraying machine and may cause failure. Moreover, even if it is a fine-grained agricultural chemical composition in which exfoliation of the agrochemical active ingredient is suppressed, exfoliation of the agrochemical active ingredient is not necessarily suppressed even under high-temperature and high-humidity conditions. Scattering (drift) is also a concern. These problems are not described in Patent Documents 1 to 4 described above.
Therefore, by a simple and low-cost production method, sprayability is good even under high-temperature and high-humidity conditions, and it is possible to suppress peeling of the pesticidal active ingredient and scattering of the fine pesticidal composition even under the same conditions. Technology is required.

JP-A-49-13338 JP 2003-12406 A JP 2003-12423 A JP 2009-84183 A

  In view of the conventional drawbacks as described above, the present invention has a good sprayability even under high temperature and high humidity conditions by a simple production method, and the release and solid formulation of agrochemical active ingredients even under the same conditions An object of the present invention is to provide a fine pesticide composition in which scattering (drift) of itself is suppressed.

The present inventors have intensively studied to solve the above problems. As a result, by setting the particle size of the fine pesticide composition to 63 to 710 μm and the apparent specific gravity to 1.0 to 2.0, scattering (drift) of the fine pesticide composition itself is suppressed, By adopting an absorbent that absorbs water by chemical adsorption, it becomes possible to maintain good sprayability even under high-temperature and high-humidity conditions, and it is found that it is advantageous in terms of manufacturing cost, and the present invention is completed. It came to.
That is, the gist of the present invention is as follows.
(1) (a) Agrochemical active ingredient, (b) Fine particulate carrier, (c) Solid binder, (d) Water and (e) Water absorption agent by chemical adsorption are mixed, and apparent specific gravity is 1.0- A fine pesticide composition, which is 2.0.
(2) The finely divided pesticide composition according to (1), wherein the water-absorbing agent (e) by chemical adsorption is anhydrous magnesium sulfate.
(3) (a) an agrochemical active ingredient, (b) a particulate carrier having an apparent specific gravity of 1.0 to 2.0, and (c) a solid bond that does not require a pretreatment step to make an aqueous solution or an aqueous dispersion in advance. (D) Water is added to the powder mixture of the agent, and then mixed to adhere the agrochemical active ingredient to the surface of the particulate carrier with the solid binder, and (e) a water absorbing agent by chemical adsorption is added, mixed and dehydrated. A method for producing a finely divided pesticide composition, comprising performing a step.
(4) The method for producing a fine pesticide composition according to (3), wherein the water-absorbing agent (e) by chemical adsorption is anhydrous magnesium sulfate.

  Since the fine-grained agricultural chemical composition of the present invention does not require a hot air drying process during production, it can be obtained at a low cost by a simple production method. In addition, even when sprayed under high temperature and high humidity conditions, it not only has good sprayability, but is excellent in terms of drift because it can suppress peeling of the pesticidal active ingredient and scattering of the fine pesticidal composition itself.

Below, it demonstrates in detail about the fine-grained agricultural chemical composition of this invention.
<About pesticide active ingredients>
The agrochemical active ingredient that can be used in the present invention is not particularly limited as long as it is generally used as an agrochemical active ingredient such as an insecticide, a fungicide, a herbicide, and a plant growth regulator. The following are mentioned as an active ingredient.
For example, organophosphorus (MEP (O, O-dimethyl-O-4-nitro-m-tolyl-6-methylpyrimidin-4-ylthiophosphate), pyridafenthione (O, O-diethyl-O- ( 3-oxo-2-phenyl-2H-pyridazin-6-yl) phosphorothioate)), carbamates (BPMC (2-secondarybutylphenyl-N-methylcarbamate), etc.), pyrethroids (permethrin ((R, S) -Α-cyano-3-phenoxybenzyl (1RS, 3RS)-(1RS, 3SR) -3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate)), benzoylhydrazide, neo Nicotinoid, triazine, thiourea, oxadiazine, phenylpyrazole , Nereistoxin and benzoylphenylurea insecticides, insect growth regulators (tebufenozide (2′-tert-butyl-N ′-(4-ethylbenzoyl) -3,5-dimethylbenzohydrazide)), buprofezin (2 -Tert-butylimino-3-isopropyl-5-phenyl-1,3,5-thiadiazin-4-one) and the like) natural insecticides, biopesticides, acaricides, nematicides and the like.

  Examples of the disinfectant include inorganic coppers, organic coppers, inorganic sulfur agents, organic sulfur agents, organic phosphorus (IBP (O, O-diisopropyl-S-benzylthiophosphate), etc.), benzimidazole, di Carboximide type, acid amide type (such as flutolanyl (α, α, α-trifluoro-3′-isopropoxy-o-toluanilide)), triazole type (tetraconazole ((±) -2- (2,4- Dichlorophenyl) -3- (1H-1,2,4-triazol-1-yl) propyl = 1,1,2,2-tetrafluoroethyl ether)), imibenconazole (4-chlorobenzyl = N- ( 2,4-dichlorophenyl) -2- (1H-1,2,4-triazol-1-yl) thioacetimidate)), imidazole, piperazine, methoxy Acrylate, oxazolidinedione, strobilurin, anilinopyrimidine, dithiolane, quinoxaline, aminopyrimidine, phenylpyrrole, triazine, cyanoacetamide, guanidine, phthalide (fuslide (4, 5, 6, 7-tetrachlorophthalide), etc., antibiotic fungicides (kasugamycin ([5-amino-2-methyl-6- (2,3,4,5,6-pentahydroxy-cyclohexyloxy)) Tetrahydropyran-3-yl] amino-α-iminoacetic acid)), natural product fungicides and biological pesticides.

As herbicides, for example, phenoxy acid type (MCPA thioethyl (S-ethyl = 2- (4-chloro-2-methylphenoxy) thioacetate), MCPB ethyl (ethyl 2-methyl-4-chlorophenoxybutyrate), etc.), Carbamates, acid amides (tenylchlor (2-chloro-N- (3-methoxy-2-enyl) -2 ′, 6′-dimethylacetanilide), butachlor (2-chloro-2 ′, 6′-diethyl-N -(Butoxymethyl) acetanilide)), acetanilide series, urea series, sulfonylurea series, pyrimidyloxybenzoic acid series, triazine series (cimetrine (2-methylthio-4,6-bis (ethylamino) -S-triazine) etc.) , Diazine series, diazole series (pyrazolate (4- (2,4-dichlorobenzoyl) -1, 3-dimethylpyrazol-5-yl-toluene-4-sulfonate), bipyridylium, dinitroaniline, aromatic carboxylic acid, imidazolinone, fatty acid, organic phosphorus, amino acid, diphenyl ether (bifenox ( 5- (2,4-dichlorophenoxy) -2-nitrobenzoic acid methyl)))), nitrile, cyclohexanedione, phenylphthalimide, cineol, indandione, benzofuran, triazolopyrimidine, oxazinone , Allyltriazolinone series, isourazole series, pyrimidinylthiophthalide series, triazolinone series, inorganic herbicides, biological pesticides and the like.
Examples of plant growth regulators include ethylene, auxin, cytokinin, and gibberellin.

The said pesticidal active ingredient may be used by 1 type, and may be used in combination of 2 or more type.
In addition, specific pesticide active ingredients contained in these include, for example, “Agricultural Chemicals Handbook 2005 Edition” (Japan Plant Protection Association, issued on October 11, 2005), “SHIBUYA INDEX 9th Edition” (SHIBUYA INDEX) Research Group, issued on December 15, 2001), “The Pesticide Manual Evention Edition” (published by British Crop Protection Council), and the like.
In addition, as the pesticidal active ingredient used in the present invention, conventionally known pesticidal active ingredients other than the above are also applied as long as they serve the same purpose as the present invention and are applied as a fine particulate pesticide composition. be able to.
The amount of the pesticidal active ingredient added is usually 0.01 to 50% by weight, preferably 0.05 to 20% by weight, in the finely divided pesticidal composition.

<About fine carrier>
Examples of the particulate carrier that can be used in the present invention include clay, calcium carbonate, talc, silica sand, bentonite, pumice, zeolite, sepiolite, diatomaceous earth, and attapulgite.
The fine-grained agricultural chemical composition of the present invention is generally sprayed by a multi-necked hose equipped with a power spreader. From the viewpoint of biological effect, sprayability, drift, etc., the particle size of the composition is 63-710 μm, apparent specific gravity. Is preferably 1.0 to 2.0. More preferably, the particle size is 63 to 300 μm and the apparent specific gravity is 1.4 to 1.8. Although it will not specifically limit if it is a fine particle support | carrier which can adjust the particle size and apparent specific gravity of such a fine particle agricultural chemical composition, Silica sand is especially preferable. Further, there is no problem even if two or more kinds of finely divided carriers are used in combination.
The amount of the finely divided carrier that can be used in the present invention is usually 40.0 to 99.9% by weight, preferably 70.0 to 99.8% by weight in the finely divided agrochemical composition.

<About solid binder>
A solid binder that develops adhesive strength through the presence of water adheres the pesticidal active ingredient to the surface of the fine particulate carrier, and then removes the water to firmly crosslink the fine particulate carrier and the pesticidal active component, thereby providing pesticidal activity. Peeling of the component from the finely divided carrier can be suppressed. Therefore, when liquid binders such as glycerin, polybutene, and liquid paraffin are used, the cross-linked portion of the pesticidal active ingredient and the particulate carrier is liquid, resulting in weaker cross-linking than the solid binder, It is not sufficient for suppressing drift due to peeling from the fine particulate carrier.
Solid binders that can be used in the present invention include natural, semi-synthetic and synthetic water-soluble polymers.
For example, natural water-soluble polymers include starch, gum arabic, tragacanth gum, guar gum, mannan, pectin, sodium alginate, sorbitol, locust bean gum, xanthan gum, dextran, curdlan, pullulan, gelatin and casein. .
Examples of the semi-synthetic water-soluble polymer include dextrin, cyclodextrin, soluble starch, pregelatinized starch, methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, and hydroxypropylmethylcellulose.
Examples of the synthetic water-soluble polymer include polyvinyl pyrrolidone, polyvinyl alcohol, polyacrylamide, sodium polyacrylate, ethylene-acrylic acid copolymer, polyethylene glycol and polyethylene oxide.
Among these, starch, dextran, dextrin, cyclodextrin, methyl cellulose, ethyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, and polyethylene oxide are more preferable, and cyclodextrin, polyethylene oxide, and carboxymethyl cellulose are more preferable.
The solid binder that can be used in the present invention does not require a pretreatment step to make an aqueous solution or an aqueous dispersion in advance, and after mixing the pesticidal active ingredient and the finely divided carrier into powder, water is added and mixed. By doing so, sufficient adhesive force can be expressed between the pesticidal active ingredient and the finely divided carrier.
The amount of the solid binder that can be used in the present invention is usually 0.1 to 10% by weight, preferably 0.3 to 5% by weight in the finely divided agrochemical composition. If the amount added is less than 0.1% by weight, drifts caused by the pesticidal active ingredient adhering to the surface of the finely divided pesticide composition easily become a problem, and even if it exceeds 10% by weight, the effect is exhibited. Therefore, if it exceeds 10% by weight, it is disadvantageous in terms of cost.

<About water>
Water is an essential component for the adhesion of the pesticidal active ingredient to the fine particulate carrier and the formation of a crosslinked part by the solid binder. As described above, the solid binder exhibits adhesive ability in the presence of water, and after the agrochemical active ingredient is adhered to the surface of the fine particulate carrier, a crosslinked portion is formed by removing water. Therefore, in the absence of water, the solid binder does not exhibit adhesive ability and a cross-linked portion is not formed, so there is a concern about scattering (drift) of the agrochemical active ingredient itself.
In addition, the addition amount of the water which can be used for this invention is 0.1 to 15 weight% normally in a fine granular agrochemical composition, Preferably it is 0.3 to 10 weight%. When the addition amount is less than 0.1% by weight, the adhesiveness of the solid binder is insufficient, so that a drift caused by peeling of the pesticidal active ingredient from the fine particulate carrier becomes a problem. There is no influence on the effect, so if it exceeds 15% by weight, it is disadvantageous in terms of cost.

<About water-absorbing agent>
In the finely divided agrochemical composition of the present invention, the water-absorbing agent by chemical adsorption is important for maintaining ease of production and good sprayability under high-temperature and high-humidity conditions. That is, at the time of manufacture, the hot air drying step can be omitted by adsorption of free water, which is simple and advantageous in terms of cost. And under high-temperature and high-humidity conditions, it has an action of preventing the fluidity of the composition from being lowered by absorbing moisture, so that it is important for maintaining good sprayability. Therefore, the properties required for the water-absorbing agent include that the water-absorbing mechanism is chemical adsorption with water (dehydration by chemical reaction with water), and that the water-absorbing agent does not solidify or is only slightly consolidated after water absorption. When the water absorption mechanism is physically adsorbed, water is adsorbed but exists in a free state, resulting in poor spraying due to reduced fluidity of the formulation. In addition, even if it is a water-absorbing agent by chemical adsorption, if it solidifies after absorbing water, such as hemihydrate gypsum, a crushing process of the consolidated site is required at the time of manufacture, which is not only disadvantageous in terms of cost. In addition, solidified lumps produced by moisture absorption during storage at high temperature and high humidity cause poor spraying.
Examples of the water-absorbing agent by chemical adsorption that can be used in the present invention include salts of organic acids, salts of inorganic acids, acid anhydrides, and calcium oxide.
The salt of the organic acid and the salt of the inorganic acid are not particularly limited as long as they can capture water as crystallization water and may be hydrates. However, an anhydride having a large amount of crystallization water taken in is preferable from the viewpoint of production and cost. .
Organic acid salts include trisodium citrate (anhydrous), disodium succinate (anhydride), calcium acetate (anhydride and monohydrate), calcium oxalate (anhydride), potassium sodium tartrate (anhydrous) Product), sodium L-tartrate (anhydrous), calcium lactate (anhydride), sodium malate (0.5 hydrated water), and the like.
Examples of inorganic acid salts include calcium chloride (anhydrous, monohydrate, dihydrate and tetrahydrate), magnesium chloride (anhydride, hexahydrate and octahydrate), and sodium carbonate. (Anhydrous, monohydrate and heptahydrate), sodium pyrophosphate (anhydride, hexahydrate, decahydrate and hexahydrate), aluminum sulfate (anhydride and monohydrate), Aluminum ammonium sulfate (anhydride), potassium aluminum sulfate (anhydride), sodium aluminum sulfate (anhydride), copper sulfate (II) (anhydride, hexahydrate, decahydrate and hexahydrate), sulfuric acid Sodium (anhydrous, dihydrate and heptahydrate), magnesium sulfate (anhydride, monohydrate, hexahydrate and heptahydrate), calcium monohydrogen phosphate (anhydride), phosphoric acid Sodium (anhydride, 0.5 hydrate, 6 Hydrate and octahydrate), disodium hydrogen phosphate (anhydrous, dihydrate and heptahydrate), sodium dihydrogen phosphate (anhydride, monohydrate and dihydrate), phosphorus Examples thereof include calcium monohydrogen acid (anhydride) and calcium dihydrogen phosphate (anhydride).
Examples of the acid anhydride include succinic anhydride and phthalic anhydride.
Among these water-absorbing agents by chemical adsorption, anhydrous calcium lactate, anhydrous calcium oxalate, anhydrous sodium sulfate, anhydrous potassium aluminum sulfate, anhydrous magnesium sulfate, anhydrous calcium hydrogen phosphate, and succinic anhydride are preferable. Anhydrous magnesium sulfate is particularly preferred from the viewpoints of the amount, shape at the time of hydrate, fluidity, safety against crop damage, and cost.
The amount of the water-absorbing agent that can be used in the present invention depends on the amount of water added during production, and is the amount that is stoichiometrically adsorbed with water from the viewpoint of simplicity of the production process and sprayability under high-temperature and high-humidity conditions. It is preferable to add to the above. As content in a fine-grained agricultural chemical composition, it is 0.1 to 25 weight% normally, Preferably it is 0.5 to 20 weight%.

<About other ingredients>
In addition to the above-mentioned essential components, the finely divided agrochemical composition of the present invention includes, as necessary, a surfactant, a powder carrier (white carbon, diatomaceous earth, glassy powder, acidic clay, urea, Lactose, granulated sugar, etc.), fluidity improvers (isopropyl acid phosphate (PAP), etc.) and pH adjusters (phosphoric acid, citric acid, etc.) should be added within a range that does not lose the effects of the present invention. Can do.

<About apparent specific gravity>
In the present invention, it is important to adjust the apparent specific gravity of the finely divided agricultural chemical composition to 1.0 to 2.0. If the apparent specific gravity of the fine pesticide composition is less than 1.0, the fine pesticide composition itself tends to scatter due to the influence of wind and the like. On the other hand, when the apparent specific gravity exceeds 2.0, the volume of the fine granular pesticide composition becomes small. Therefore, when spraying from a spraying device such as a multi-hose equipped with a power spreader, the fine granular pesticide composition The discharge time becomes short, and problems such as difficulty in uniformly spraying the composition occur.
Therefore, it is essential to adjust the apparent specific gravity to 1.0 to 2.0, more preferably 1.4 to 1.8, from the viewpoint of maintaining the dispersibility and sprayability of the finely divided pesticide composition. It is to be.
In addition, the apparent specific gravity of the fine granular agricultural chemical composition was measured by the following method.
(Apparent specific gravity measurement method)
Place a sieve with a diameter of 710 μm with an inner diameter of 200 mm and a depth of 45 mm 20 cm above the top of a 100 mL metal cylindrical container with an inner diameter of 50 mm, put an appropriate amount of the fine pesticide composition on the sieve, and gently scrape off with a brush. While filling the metal cylindrical container. Then, using a slide glass, level the top of the metal cylindrical container, remove the excess fine pesticide composition, measure the weight (Ag) of the contents in the metal cylindrical container, The apparent specific gravity of the fine granular pesticide composition was determined.

<Method for producing finely divided pesticide composition>
The finely divided agricultural chemical composition of the present invention can be produced by the following steps.
Pesticide active ingredient, fine particulate carrier with apparent specific gravity of 1.0-2.0, solid binder that does not require pre-treatment step to make aqueous solution or water dispersion in advance, and other auxiliary ingredients if necessary Mix in the machine (about 5 minutes to 2 hours), add water and mix for about 5 minutes to 1 hour. Then, after adding a water-absorbing agent by chemical adsorption, mixing for about 10 minutes to 1 hour and performing a dehydration step, it is sieved as necessary, and a fine pesticide composition with an apparent specific gravity of 1.0 to 2.0 I got a thing. The agrochemical active component may be a solid component that has been finely divided by Jet pulverization or wet pulverization in advance, and the liquid component may be adsorbed to an oil absorbent or the like.
In the method for producing a finely divided agrochemical composition of the present invention, a water-absorbing mechanism by chemical adsorption is used, and a water-absorbing agent that does not solidify after water absorption or remains slightly consolidated is used. A crushing step is not required, and since it can be produced with only one mixer, it is a simple production method and is more advantageous than conventional production methods in terms of energy and cost. In addition, for solid binders, a sufficient mixing force is exerted by a simple mixing step with an agrochemical active ingredient, a finely divided carrier and water, and there is no step for making the binder into an aqueous solution or aqueous dispersion in advance. This is a manufacturing method. Furthermore, the mixer that can be used in the present manufacturing method only needs to be capable of powder mixing and does not require functions such as variable temperature and pulverization. It can be used and is economical. Examples thereof include a Ladige mixer, a high speed mixer, a concrete mixer, a kneader, a ribbon mixer, and a pug mixer.

<Usage aspect of fine-grained agricultural chemical composition>
The finely divided pesticide composition produced as described above is sprayed on crops using a multi-nose hose equipped with a power spreader or a direct injection pipe, or sprayed onto the crops from the air using an aircraft, manned helicopter or radio controlled helicopter. Or, it can be used by spraying on crops with hand or manpower spreader. In addition, it can be used by treating the planting hole or stock of the crop, mixing the soil, treating the soil surface, or treating the seedling box.
It should be noted that there is no problem even if two or more kinds of fine particulate agricultural chemical compositions obtained by the present technology are mixed in advance and then sprayed. Moreover, the application amount per 10 ares of a fine-grained agricultural chemical composition when spraying to a paddy field using a multi-mouth hose or a direct injection tube is usually 0.5 to 5 kg, preferably 1 to 4 kg. The application amount per 10 ares of the fine-grained pesticide composition when used for horticultural use in crop planting holes and plant stocks, or when used for soil mixing treatment is usually 0.5 to 50 kg, preferably Is 1-30 kg.

EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited to these.
In the following examples and comparative examples, “parts” means all parts by weight.

Kasugamycin (antibiotic fungicide) 0.3 parts, silica sand (particle size: 63-300 μm) (fine particulate carrier) 97.2 parts, and cyclodextrin (solid binder) 0.8 part in a Laedige mixer After the addition, it was mixed for about 5 minutes. Next, 0.8 parts of water is added to the mixture and mixed for about 15 minutes, and then 0.9 parts of anhydrous magnesium sulfate (water absorbing agent by chemical adsorption) is added, and the mixture is mixed until the fluidity of the mixture becomes good. Mix for 20 minutes. Thereafter, the mixture was taken out from the Ladige mixer to obtain a finely divided pesticide composition.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.7.

Kasugamycin (antibiotic antibiotic) 0.3 part, Pumice (particle size: 63-300 μm) (fine particulate carrier) 97.0 parts, Carboxymethylcellulose (solid binder) 0.8 part, Water 0.8 part, and A fine agrochemical composition was obtained in the same manner as in Example 1 except that 1.1 parts of anhydrous potassium aluminum sulfate (water absorbing agent by chemical adsorption) was used.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.1.

Kasugamycin (antibiotic antibiotic) 0.3 part, silica sand (particle size: 63-300 μm) (fine particulate carrier) 97.8 parts, polyethylene oxide (solid binder) 0.2 part, water 0.8 part, and A fine agricultural chemical composition was obtained in the same manner as in Example 1 except that 0.9 part of anhydrous magnesium sulfate (water absorbing agent by chemical adsorption) was used.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.1.

Kasugamycin (antibiotic antibiotic) 0.3 part, silica sand (particle size: 63-300 μm) (fine particulate carrier) 95.8 part, carboxymethylcellulose (solid binder) 0.8 part, water 0.8 part, and A fine agricultural chemical composition was obtained in the same manner as in Example 1 except that 2.3 parts of anhydrous calcium lactate (water absorbing agent by chemical adsorption) was used.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.5.

Kasugamycin (antibiotic fungicide) 0.3 part, silica sand (particle size: 63-300 μm) (fine particulate carrier) 90.8 parts, polyethylene oxide (solid binder) 0.2 part, water 0.8 part, and A fine pesticide composition was obtained in the same manner as in Example 1 except that 7.9 parts of phthalic anhydride (water absorbing agent by chemical adsorption) was used.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.3.

Kasugamycin (antibiotic fungicide) 0.3 part, silica sand (particle size: 63-300 μm) (microparticulate carrier) 91.3 parts, cyclodextrin (solid binder) 0.8 part, water 0.8 part, and A fine pesticide composition was obtained in the same manner as in Example 1 except that 6.8 parts of anhydrous calcium oxalate (water absorbing agent by chemical adsorption) was used.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.4.

2.0 parts of IBP (organophosphorus fungicide) is absorbed in 2.5 parts of white carbon (auxiliary agent), and further, 89.3 parts of silica sand (particle size: 63 to 300 μm) (fine particulate carrier) and polyethylene oxide ( 0.8 part of a solid binder) was added into the Laedige mixer and mixed for about 15 minutes. Add 2.5 parts of water to this mixture and mix for about 15 minutes, then add 2.9 parts of anhydrous magnesium sulfate (water absorbing agent by chemical adsorption) and mix for about 20 minutes until the fluidity of the mixture becomes good did. Thereafter, the mixture was taken out from the Ladige mixer to obtain a finely divided pesticide composition.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.2.

2.0 parts of IBP (organophosphorus fungicide), silica sand (particle size: 63-300 μm) (microparticulate carrier) 83.7 parts, 2.0 parts of starch (solid binder), 2.5 parts of water, anhydrous lactic acid A fine agricultural chemical composition was obtained in the same manner as in Example 7, except that 7.3 parts of calcium (water absorbing agent by chemical adsorption) and 2.5 parts of white carbon (adjuvant) were used.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.5.

2.0 parts of IBP (organophosphorus fungicide), pumice (particle size: 63 to 300 μm) (particulate carrier) 87.4 parts, 2.0 parts of carboxymethylcellulose (solid binder), water 2.5 parts, anhydrous A fine pesticide composition was obtained in the same manner as in Example 7, except that 3.6 parts of potassium aluminum sulfate (water absorbing agent by chemical adsorption) and 2.5 parts of diatomaceous earth (adjuvant) were used.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.0.

2.0 parts of IBP (organophosphorous fungicide), silica sand (particle size: 63-300 μm) (fine particulate carrier) 89.3 parts, polyethylene oxide (solid binder) 0.8 parts, water 2.5 parts, anhydrous A fine pesticide composition was obtained in the same manner as in Example 7 except that 2.9 parts of magnesium sulfate (water absorbing agent by chemical adsorption) and 2.5 parts of white carbon (adjuvant) were used.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.4.

IBP (organophosphorous fungicide) 2.0 parts, silica sand (particle size: 63-300 μm) (fine particulate carrier) 79.7 parts, carboxymethylcellulose (solid binder) 2.0 parts, water 2.5 parts, anhydrous A fine agrochemical composition was obtained in the same manner as in Example 7 except that 11.3 parts of calcium monohydrogen phosphate (water absorbing agent by chemical adsorption) and 2.5 parts of white carbon (adjuvant) were used.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.1.

2.0 parts of pyridafenthion (organophosphorus insecticide), silica sand (particle size: 63-300 μm) (fine particulate carrier) 91.7 parts, 2.0 parts of carboxymethylcellulose (solid binder), 2.0 parts of water, and A fine agricultural chemical composition was obtained in the same manner as in Example 1 except that 2.3 parts of anhydrous magnesium sulfate (water absorbing agent by chemical adsorption) was used.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.2.

2.0 parts pyridafenthion (organophosphorus insecticide), silica sand (particle size: 63-300 μm) (fine particulate carrier) 91.7 parts, 2.0 parts starch (solid binder), 2.0 parts water, and anhydrous A fine pesticide composition was obtained in the same manner as in Example 1 except that 2.3 parts of magnesium sulfate (water absorbing agent by chemical adsorption) was used.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.5.

2.0 parts of pyridafenthion (organophosphorus insecticide), 91.7 parts of pumice (particle size: 63-300 μm) (fine particulate carrier), 2.0 parts of starch (solid binder), 2.0 parts of water, and anhydrous A fine agrochemical composition was obtained in the same manner as in Example 1 except that sodium dihydrogen phosphate (water absorbing agent by chemical adsorption) was used in an amount of 2.3 parts.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.1.

2.0 parts pyridafenthion (organophosphorus insecticide), silica sand (particle size: 63-300 μm) (fine particulate carrier) 92.3 parts, 0.8 parts polyethylene oxide (solid binder), 2.0 parts water, and A fine agricultural chemical composition was obtained in the same manner as in Example 1 except that 2.9 parts of anhydrous potassium aluminum sulfate (water absorbing agent by chemical adsorption) was used.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.8.

MEP (organophosphorus pesticide) 3.0 parts, silica sand (particle size: 63-300 μm) (fine particulate carrier) 85.6 parts, starch (solid binder) 2.5 parts, water 2.5 parts, sulfuric anhydride A fine agricultural chemical composition was obtained in the same manner as in Example 7, except that 2.9 parts of magnesium (water absorbing agent by chemical adsorption) and 3.5 parts of diatomaceous earth (adjuvant) were used.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.2.

MEP (organophosphorus pesticide) 3.0 parts, silica sand (particle size: 63-300 μm) (microparticulate carrier) 84.4 parts, carboxymethylcellulose (solid binder) 2.5 parts, water 2.5 parts, anhydrous A fine agricultural chemical composition was obtained in the same manner as in Example 7 except that 4.1 parts of calcium chloride (water absorbing agent by chemical adsorption) and 3.5 parts of white carbon (adjuvant) were used.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.4.

MEP (organophosphorus insecticide) 3.0 parts, silica sand (particle size: 63-300 μm) (fine particulate carrier) 86.9 parts, polyethylene oxide (solid binder) 1.2 parts, water 2.5 parts, anhydrous A fine pesticide composition was obtained in the same manner as in Example 7 except that 2.9 parts of magnesium sulfate (water absorbing agent by chemical adsorption) and 3.5 parts of white carbon (auxiliary agent) were used.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.4.

MEP (organophosphorus pesticide) 3.0 parts, silica sand (particle size: 63-300 μm) (fine particulate carrier) 81.2 parts, cyclodextrin (solid binder) 2.5 parts, water 2.5 parts, anhydrous A fine pesticide composition was obtained in the same manner as in Example 7 except that 7.3 parts of calcium lactate (water absorbing agent by chemical adsorption) and 3.5 parts of white carbon (adjuvant) were used.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.1.

[Comparative Example 1]
Kasugamycin (antibiotic antibiotic) 0.3 part, Pumice (particle size: 63-300 μm) (fine particulate carrier) 97.8 parts, polyethylene oxide (solid binder) 0.2 part, water 0.8 part, and A fine agricultural chemical composition was obtained in the same manner as in Example 1 except that 0.9 part of anhydrous magnesium sulfate (water absorbing agent by chemical adsorption) was used.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 0.9.

[Comparative Example 2]
Kasugamycin (antibiotic fungicide) 0.3 parts, silica sand (particle size: 63-300 μm) (fine particulate carrier) 98.0 parts, water 0.8 parts, and anhydrous magnesium sulfate (chemical absorption water absorbing agent) 0. A fine pesticide composition was obtained in the same manner as in Example 1 except that the amount was 9 parts.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.4.

[Comparative Example 3]
Kasugamycin (antibiotic fungicide) 0.3 part, silica sand (particle size: 63-300 μm) (fine particulate carrier) 98.7 parts, and polyethylene oxide (solid binder) 0.2 part in a Laedige mixer Added and mixed for about 5 minutes. After adding 0.8 parts of water to this mixture, the mixture kneaded for about 15 minutes was transferred to a fluidized bed dryer and subjected to ventilation drying at 55 ° C. for 30 minutes to obtain a finely divided pesticide composition.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.4.

[Comparative Example 4]
Kasugamycin (antibiotic antibiotic) 0.3 part, silica sand (particle size: 63-300 μm) (fine particulate carrier) 97.1 part, carboxymethylcellulose (solid binder) 0.8 part, water 0.8 part, and A fine agrochemical composition was obtained in the same manner as in Example 1 except that 1.0 part of white carbon (water absorbing agent by physical adsorption) was used.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.5.

[Comparative Example 5]
Add 0.3 parts of kasugamycin (antibiotic antibiotic), silica sand (particle size: 63-300 μm) (fine particulate carrier) 99.5 parts, and 0.2 part of polybutene (liquid binder) into the Laedige mixer Thereafter, the mixture was mixed for about 10 minutes to obtain a finely divided pesticide composition.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.3.

[Comparative Example 6]
2.0 parts of IBP (organophosphorus fungicide), pumice (particle size: 63-300 μm) (particulate carrier) 87.4 parts, 2.0 parts of starch (solid binder), water 2.5 parts, sulfuric anhydride A fine agricultural chemical composition was obtained in the same manner as in Example 7 except that 3.6 parts of aluminum potassium (chemical absorption water absorbing agent) and 2.5 parts of white carbon (adjuvant) were used.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 0.9.

[Comparative Example 7]
IBP (organophosphorous fungicide) 2.0 parts, pumice (particle size: 63-300 μm) (fine particulate carrier) 88.2 parts, carboxymethylcellulose (solid binder) 2.0 parts, water 2.5 parts, white A fine pesticide composition was obtained in the same manner as in Example 7, except that 2.8 parts of carbon (water absorbing agent by physical adsorption) and 2.5 parts of diatomaceous earth (adjuvant) were used.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.2.

[Comparative Example 8]
2.0 parts of IBP (organophosphorous fungicide), silica sand (particle size: 63-300 μm) (fine particulate carrier) 92.2 parts, polyethylene oxide (solid binder) 0.8 parts, water 2.5 parts, and A fine pesticide composition was obtained in the same manner as Comparative Example 3 except that 2.5 parts of diatomaceous earth (adjuvant) was used.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.5.

[Comparative Example 9]
2.0 parts of IBP (organophosphorous fungicide), silica sand (particle size: 63 to 300 μm) (fine particulate carrier), 89.4 parts, anhydrous aluminum sulfate (water absorption agent by chemical adsorption) 3.6 parts, water 2. A fine agricultural chemical composition was obtained in the same manner as in Example 7 except that 5 parts and 2.5 parts of white carbon (adjuvant) were used.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.1.

[Comparative Example 10]
2.0 parts of IBP (organophosphorous fungicide), silica sand (particle size: 63-300 μm) (fine particulate carrier) 95.0 parts, 0.5 part of glycerin (liquid binder), and white carbon (adjuvant) 2 A fine granular agrochemical composition was obtained in the same manner as in Comparative Example 5 except that the amount was 5 parts.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.1.

[Comparative Example 11]
2.0 parts pyridafenthion (organophosphorus insecticide), silica sand (particle size: 63-300 μm) (fine particulate carrier) 91.5 parts, 2.0 parts starch (solid binder), 2.0 parts water, and diatomaceous earth (Water-absorbing agent by physical adsorption) A particulate agricultural chemical composition was obtained in the same manner as in Example 1 except that the amount was 2.5 parts.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.4.

[Comparative Example 12]
1. 2.0 parts of pyridafenthione (organophosphorus insecticide), 93.7 parts of pumice (particle size: 63 to 300 μm) (fine particulate carrier), 2.0 parts of water, and anhydrous magnesium sulfate (water absorbing agent by chemical adsorption) A fine pesticide composition was obtained in the same manner as in Example 1 except that the amount was 3 parts.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.0.

[Comparative Example 13]
2.0 parts of pyridafenthione (organophosphorus insecticide), 95.2 parts of pumice (particle size: 63 to 300 μm) (fine particulate carrier), 0.8 part of polyethylene oxide (solid binder), and 2.0 parts of water Except that, a fine pesticide composition was obtained in the same manner as in Comparative Example 3.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.2.

[Comparative Example 14]
2.0 parts pyridafenthion (organophosphorus insecticide), 91.7 parts pumice (particle size: 63-300 μm) (fine particulate carrier), 2.0 parts carboxymethylcellulose (solid binder), 2.0 parts water, and A fine agricultural chemical composition was obtained in the same manner as in Example 1 except that 2.3 parts of anhydrous magnesium sulfate (water absorbing agent by chemical adsorption) was used.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 0.9.

[Comparative Example 15]
After mixing 2.0 parts of pyridafenthion (organophosphorus insecticide) and 85.0 parts of silica sand (particle size: 63-300 μm) (fine particulate carrier) for about 5 minutes in a Laedige mixer, further 10% polyvinyl alcohol 3.0 parts of an aqueous solution (binder) was added and mixed for about 15 minutes. After adding 10.0 parts of hemihydrate gypsum (water absorption agent by chemical adsorption) to this mixture and continuing to mix for about 15 minutes, since the solidified deposit was confirmed inside the mixer, mixing was once stopped and solidified. After scraping off the kimono, mixing was resumed to obtain a finely divided pesticide composition.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.3.

[Comparative Example 16]
After mixing 2.0 parts of pyridafenthione (organophosphorus insecticide) and 80.0 parts of silica sand (particle size: 63-300 μm) (fine particulate carrier) in a Ladige mixer for about 5 minutes, 10% polyvinyl alcohol 3.0 parts of an aqueous solution (binder) was added and mixed for about 15 minutes. After adding 15.0 parts of hemihydrate gypsum (chemical absorption water absorbing agent) to this mixture, mixing was continued for about 15 minutes. As a result, solidified deposits were confirmed inside the mixer. After scraping off the kimono, mixing was resumed to obtain a finely divided pesticide composition.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.2.

[Comparative Example 17]
MEP (organophosphorus insecticide) 3.0 parts, silica sand (particle size: 63-300 μm) (fine particulate carrier) 83.7 parts, water 2.5 parts, anhydrous calcium lactate (water absorbing agent by chemical adsorption) 7.3 Parts and white carbon (adjuvant) 3.5 parts were obtained in the same manner as in Example 7 to obtain a finely divided pesticide composition.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 1.4.

[Comparative Example 18]
MEP (organophosphorus insecticide) 3.0 parts, pumice (particle size: 63-300 μm) (microparticulate carrier) 88.5 parts, carboxymethylcellulose (solid binder) 2.5 parts, water 2.5 parts, and A fine agricultural chemical composition was obtained in the same manner as in Comparative Example 3 except that 3.5 parts of white carbon (adjuvant) was used.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.2.

[Comparative Example 19]
MEP (organophosphorus insecticide) 3.0 parts, pumice (particle size: 63-300 μm) (fine particulate carrier) 85.5 parts, starch (solid binder) 2.5 parts, water 2.5 parts, white carbon A fine pesticide composition was obtained in the same manner as in Example 7 except that 3.0 parts (water absorbing agent by physical adsorption) and 3.5 parts of diatomaceous earth (adjuvant) were used.
In addition, the apparent specific gravity of the obtained fine granular agrochemical composition was 1.2.

[Comparative Example 20]
MEP (organophosphorus insecticide) 3.0 parts, silica sand (particle size: 63-300 μm) (fine particulate carrier) 82.9 parts, polyethylene oxide (solid binder) 0.8 parts, water 2.5 parts, anhydrous A fine pesticide composition was obtained in the same manner as in Example 7 except that 7.3 parts of calcium lactate (water absorbing agent by chemical adsorption) and 3.5 parts of white carbon (adjuvant) were used.
In addition, the apparent specific gravity of the obtained fine granular agricultural chemical composition was 0.9.

Next, the usefulness of the particulate agricultural chemical composition of the present invention will be shown by test examples.
The purpose of this test is to evaluate the driftability (calculated by the peeling rate and the scattering rate) in the state exposed to high-temperature and high-humidity conditions, and the sprayability (checking the dischargeability and adhesion to the sprayer visually). I did it.

<Drift test (calculation of peel rate)>
A midget duster was installed in a greenhouse set at 35 ° C. and a humidity of 80% (installed so that the height of the discharge part from the ground is 1 m). Next, a factory fan was installed 2 m behind the midget duster discharge section, and the factory fan was operated so that the wind speed of the midget duster discharge section was 3 m / sec. In addition, a pole was set up at a position 10 m ahead of the midget duster discharge part, and a petri dish (diameter 9 cm) was installed at a position 1.5 m in height of the pole. 500 g of a sample composition (fine particulate pesticide composition produced in Examples 1-19 and Comparative Examples 1-20) previously stored for one week under conditions of 35 ° C. and 80% humidity is put into this apparatus and sprayed. Then, the amount of the pesticidal active ingredient (active ingredient) collected in the petri dish was measured. Moreover, the particulate agricultural chemical composition after spraying was collect | recovered, and the agricultural chemical active ingredient (active ingredient) content rate (%) after spraying was measured. And the peeling rate (%) was computed from the following formula by comparison with the agrochemical active ingredient content rate (%) before spraying.
The amount of pesticide active ingredient (active ingredient) is “Composition of official inspection of agricultural chemicals” (October 31, 1972, 2nd edition, published by Minami-Edo), page 221, “Preparation based on kasugamycin”. And IBP, pyridafenthione, and MEP were measured by high performance liquid chromatography.
The test results are shown in Table 1 (Examples) and Table 2 (Comparative Examples).

<Drift test (calculation of scattering rate)>
The scattering rates (%) of Examples 1 to 6 and Comparative Examples 1 to 5 are compared with the amount of kasugamycin recovered in Comparative Example 21 (Kasugamycin (0.3%) powder) (Kasugamycin (0.3%) powder petri dish The ratio was calculated from the following formula using the amount of recovered kasugamycin as 100: Similarly, the scattering rate (%) of Examples 7 to 11 and Comparative Examples 6 to 10 is a comparison with the case where IBP (2%) powder of Comparative Example 22 is sprayed, Examples 12 to 15 and Comparative Examples. The scattering rate (%) of 11 to 16 is a comparison with the case where the pyridafenthione (2%) powder of Comparative Example 23 is sprayed, and the scattering rate (%) of Examples 16 to 19 and Comparative Examples 17 to 20 is a comparison. It was calculated from the following formula by comparison with the case where the MEP (3%) powder of Example 24 was sprayed.
The amount of pesticide active ingredient (active ingredient) is “Composition of official inspection of agricultural chemicals” (October 31, 1972, 2nd edition, published by Minami-Edo), page 221, “Preparation based on kasugamycin”. And IBP, pyridafenthione, and MEP were measured by high performance liquid chromatography.
The test results are shown in Table 1 (Examples) and Table 2 (Comparative Examples).

<Dispersibility test>
The sprayability of the fine pesticide composition from the midget duster during spraying and the adherence of the fine pesticide composition to the inside of the sprayer after spraying are visually observed, and the sprayability of each sample composition is as follows: evaluated. The evaluation criteria are as follows.

Evaluation criteria for ejectability:
“○” is good and has no practical problem.
“△” indicates discharge unevenness and practical problems.
“×” means there is a problem in practical use because it does not discharge the entire amount.

Evaluation criteria for adhesion:
No "A"
"B" is a very small amount,
"C" is clear,
"D" is a lot,
“A” and “B” have no practical problem, but “C” and “D” have a practical problem. The results are shown in Table 1 (Example) and Table 2 (Comparative Example).

<Explanation of the table>
(1) About drift
As is clear from Tables 1 and 2, the drift property evaluated from the peeling rate and the scattering rate was affected by the presence of the solid binder and the apparent specific gravity. In Tables 1 and 2, Examples 1, 4, 6, 8, 10, 13, 15, 17 and 18 which use a solid binder and have an apparent specific gravity of 1.4 to 1.8, and Comparative Example 3 4, 8 and 11 showed low values for both the peeling rate and the scattering rate, and the drift was good. Also, Examples 2, 3, 5, 7, 9, 11, 12, 14, 16 and 19 and Comparative Examples 7, 13 using a solid binder and having an apparent specific gravity of 1.0 or more and less than 1.4. 15, 15, 18, and 19 showed a low peeling rate, but although the scattering rate was slightly high, it was at a level that was not a problem for practical use. On the other hand, although the solid binder is used, Comparative Examples 1, 6, 14 and 20 having an apparent specific gravity of less than 1.0 show a high scattering rate although the peel rate of the agrochemical active ingredient was low. As a result, there was a concern about the drift of the fine granular pesticide composition itself. Moreover, although the specific gravity is in the range of 1.0 to 2.0, Comparative Examples 2, 9, 12, and 17 that do not use a solid binder, and Comparative Examples that use a liquid binder as an alternative to the solid binder 5 and 10 showed remarkably high values for both the peeling rate and the scattering rate, which resulted in concerns about drift due to peeling of the agrochemical active ingredient and drift of the fine pesticide composition itself.

(2) About dispersibility The dispersibility of the fine granular pesticide composition under the high-temperature and high-humidity conditions shown in Tables 1 and 2 was affected by the presence and type of the water-absorbing agent by chemical adsorption. The finely divided pesticide compositions of Examples 1 to 19 and Comparative Examples 1, 2, 6, 9, 12, 14, 17, and 20 are practical even if sprayed under the same conditions after storage under high temperature and high humidity conditions. Dispersibility (ejection and adhesion) with no problem was shown. In particular, the fine pesticide compositions of Examples 1, 3, 7, 10, 12, 13, 16 and 18 and Comparative Examples 1, 2, 12, and 14 using anhydrous magnesium sulfate as the water-absorbing agent were Excellent results in terms of adhesion in the spreader. On the other hand, Comparative Examples 3, 5, 8, 10, 13 and 18 which do not use a water-absorbing agent by chemical adsorption have poor fluidity when stored under high temperature and high humidity conditions, and discharge unevenness and clear adhesion in the spraying machine are recognized. It was. Further, Comparative Example 15 using hemihydrate gypsum as a water-absorbing agent by chemical adsorption had poor fluidity, ejection unevenness and a large amount of adhesion in the spreader were observed, resulting in poor spraying. In Comparative Example 16 in which the amount of hemihydrate gypsum was further increased by 5 parts compared to Comparative Example 15, a solidified product that was thought to be derived from hemihydrate gypsum was produced in the preparation, and discharge unevenness and clear adhesion in the sprayer were observed. The spraying was poor. Furthermore, Comparative Examples 4, 7, 11 and 19 using a water-absorbing agent by physical adsorption absorb a certain amount of free water by the water-absorbing agent, but the fluidity is poor, and the entire amount cannot be discharged, and a large amount in the sprayer. Adherence was observed, resulting in poor spraying.

  As mentioned above, while using a solid binder, the water absorption mechanism is chemical adsorption, and a water absorbing agent that does not solidify after water absorption or remains slightly consolidated, and has an apparent specific gravity of 1.0 to 2. The finely divided pesticide compositions of Examples 1 to 18 that were 0 gave good results for both driftability and dispersibility under high-temperature and high-humidity conditions. On the other hand, Comparative Examples 1 to 20 have a problem in either driftability or dispersibility, and Comparative Examples 2, 5, 9, 10, 12, and 17 that do not use a solid binder peel off for driftability. In Comparative Examples 1, 6, 14 and 20, which are defective in terms of the scattering rate and the apparent specific gravity is less than 1.0, the drift property is poor in terms of the scattering rate. Moreover, as for the sprayability under high temperature and high humidity conditions, Comparative Examples 3, 5, 8, 10, 13 and 18 in which no water absorbing agent by chemical adsorption is used, and Comparative Example 15 in which hemihydrate gypsum is used as the water absorbing agent by chemical adsorption. And 16, and Comparative Examples 4, 7, 11 and 19 using a water-absorbing agent by physical adsorption had poor spraying due to poor fluidity under high temperature and high humidity conditions.

  Therefore, while having the simplicity of the production method, the pesticidal active ingredient, in order to suppress the peeling of the pesticidal active ingredient and to maintain the driftability from the viewpoint of scattering of the fine pesticidal composition itself, and the sprayability under high temperature and high humidity conditions, It is produced by a step of adding and mixing water and a water-absorbing agent in the order of chemical adsorption to a powder mixture of a finely divided carrier and a solid binder, and an effective means is that the apparent specific gravity is 1.0 to 2.0, Furthermore, it has been found that using magnesium sulfate anhydride as a water absorbing agent by chemical adsorption and adjusting the apparent specific gravity to 1.4 to 1.8 is a more effective means.

Claims (4)

  (A) Agrochemical active ingredient, (b) Fine particulate carrier, (c) Solid binder, (d) Water, and (e) Water absorbent by chemical adsorption are mixed, and the apparent specific gravity is 1.0-2. A fine pesticide composition characterized by being zero.   The finely divided pesticide composition according to claim 1, wherein the water-absorbing agent (e) by chemical adsorption is anhydrous magnesium sulfate.   (A) an agrochemical active ingredient, (b) a particulate carrier having an apparent specific gravity of 1.0 to 2.0, and (c) a solid binder powder that does not require a pretreatment step to make an aqueous solution or an aqueous dispersion in advance. (D) Water is added to the body mixture, followed by mixing and adhering the pesticidal active ingredient to the surface of the particulate carrier with a solid binder, and (e) adding and mixing a water-absorbing agent by chemical adsorption to perform a dehydration step. A method for producing a finely divided agricultural chemical composition.   The method for producing a finely divided pesticide composition according to claim 3, wherein the water-absorbing agent (e) by chemical adsorption is anhydrous magnesium sulfate.