JP2010100565A - Fine particulate agrichemical composition and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new agrichemical composition preventing agrichemical active components covering a mineral fine particle from peeling off. <P>SOLUTION: This fine particulate agrichemical composition contains an agrichemical active component, a water-soluble binder and a liquid sugar not crystallizable at normal temperatures in a form covering a mineral fine particle. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a pesticide active ingredient, a water-soluble binder, a liquid saccharide that does not crystallize at room temperature, a fine pesticidal composition with reduced peeling of the pesticidal active ingredient, and a method for producing the same. About.

  As a method for controlling pests at the later stage of Honda in paddy rice cultivation, a method of spraying DL powder, a method of spraying a diluted solution of a liquid preparation on the ground or by an unmanned helicopter, and a surface application of granules are widely used. Among these methods, DL powder (particle size: 45 μm or less) is used as a main formulation in the latter period of Honda because it can be directly sprayed without diluting the formulation in water and is inexpensive. On the other hand, DL powder has a large scattering when sprayed, and the impact on the surrounding crops after the implementation of the positive list system is greatly highlighted, along with the exposure of pesticides to the sprayer and the impact on the surrounding living environment in residential suburbs. Increasingly, producers are refraining from spraying DL powder and switching to spraying with less scattering. However, there are cases in which the effect becomes unstable when the granule (particle size: 300 to 1700 μm) is applied to the water surface, and the control cost is higher than that of DL powder. Therefore, development of a foliage spraying agent that is inexpensive and has little scattering is desired.

On the other hand, there is a granule (particle size: 45 to 300 μm) as an agrochemical formulation with less scattering when sprayed than DL powder, and the agrochemical formulation includes four types of formulations having different particle sizes, ie, , Fine granule (particle size: 106-300 μm), fine granule F (particle size: 63-212 μm), coarse powder (particle size: 45-106 μm) and fine granule F (particle size: 180-710 μm) ( Non-patent document 1). Among these, the fine granule F has a good balance of the amount of scattering, cost, and the effect as an agrochemical.
The fine granule F is a preparation having a particle size distribution with a particle size of 63 to 212 μm as described above. According to Non-Patent Document 1, the basic composition of a granule containing fine granule F consists of an agrochemical raw material, a binder, and a bulking agent. Of these components, PVA (polyvinyl alcohol), starch, resin emulsion, etc. are used as binders, and silica sand, clay, talc, bentonite, calcium carbonate, etc. are used as extenders, but silica sand is often used. . In addition to the granule production method (extruded granulation method), a granule larger than the desired formulation is prepared by extruding and granulating it first to obtain the required particle size (crush granulation method). There is a method (surface coating method: coating method) in which a pesticide raw material is coated with a binder on the surface of silica sand or the like having an appropriate particle size distribution. Among these production methods, the crushing granulation method is produced by crushing a relatively soft granulated product or natural base, and therefore drift due to mixing of fine powder generated by crushing or generation of fine powder due to physical impact. There is a high possibility of this, and productivity is not necessarily high. On the other hand, since the crushing step is unnecessary in the surface coating method, the surface coating method is suitable as a method for producing a preparation that is sprayed directly on agricultural land like the fine granules F at low cost.
On the other hand, since the active ingredient is coated on the particle surface of the powder containing the fine granule F produced by the surface coating method, the active ingredient is easily peeled off by the friction during spraying, and the selection of the binder is important. (Non-Patent Document 1), various selections and improvements have been made for such binders. For example, in Patent Document 1, a non-oil-absorbing mineral granular carrier is coated with a non-oil-absorbing mineral powder of 10 μm or less using a water-soluble binder such as polyvinyl alcohol or lignin sulfonate. A method for producing a fine granule F in which a liquid agrochemical component is impregnated after the production is disclosed. In Patent Document 2, a foliar absorption type herbicide compound having a cationic group and a water-soluble binder are held in a silica sand having a particle size of 0.1 to 0.3 mm or a carrier mainly composed of calcium carbonate. In addition, as a water-soluble binder, high-viscosity organic solvents such as polyethylene glycol and polypropylene glycol, pastes such as carboxymethyl cellulose, dextran, polyvinyl alcohol, and polyvinyl pyrrolidone, and various surfactants are disclosed. Use is described.

Agricultural Chemical Society of Japan Agricultural Chemical Formulation and Application Method Study Group “Agricultural Chemical Formulation Guide”, Japan Plant Protection Association, October 30, 1997, p. 17-19 Japanese Examined Patent Publication No. 63-11322 JP-A-2005-112836 JP 2000-063205 A JP-T-2004-504331

  Agrochemical formulations produced by wetting mineral fine particles with a binder aqueous solution, coating the pesticide active ingredient, and drying, especially not only fine granules having a particle size distribution of 106-300 μm, but also a particle size distribution of 63-212 μm Despite the various selections and improvements of the binder as described above, the expected active ingredient content rate is obtained by peeling fine particles containing an agrochemical active ingredient in the drying step. Not only can it be obtained, but when spraying, especially when spraying with a power spreader, fine particles containing peeled pesticidal active ingredients may scatter and have a serious adverse effect on workers' health and surrounding crops. . Therefore, where there is a continuing demand for an agrochemical composition that can preferably suppress the peeling of the agrochemical active ingredient coated with mineral fine particles, the present invention provides such a new agrochemical composition. The issue is to provide.

As a result of intensive studies to solve the above-mentioned problems, the present inventors have surprisingly found that it is possible to suppress the peeling of the pesticidal active ingredient by modifying the type of the component coated on the mineral fine particles. As a result of the heading and further research, the present invention has been completed.
That is, the present invention relates to a finely divided agricultural chemical composition containing an agricultural chemical active ingredient, a water-soluble binder, and a liquid saccharide that does not crystallize at room temperature coated on mineral fine particles.
The present invention also relates to the above-mentioned finely divided pesticide composition, wherein the liquid saccharide that does not crystallize at room temperature is a converted liquid sugar containing a reducing sugar.
Furthermore, this invention relates to the said fine-grained agricultural chemical composition in which an agricultural chemical active ingredient contains 1 type, or 2 or more types of agricultural chemical active components whose water solubility in 20 degreeC is 100 ppm or more.
Moreover, this invention relates to the said fine-grained agricultural chemical composition which is a silica sand which contains 90% or more of particle | grains in which a mineral fine particle has a particle size of 63-300 micrometers.
Furthermore, this invention relates to the said fine-grained pesticide composition whose agrochemical active ingredient whose water solubility in 20 degreeC is 100 ppm or more is dinotefuran or tricyclazole.
The present invention includes a step of wetting mineral fine particles with a mixed aqueous solution of a water-soluble binder and a liquid saccharide that does not crystallize at room temperature, a step of coating with an agrochemical active ingredient, and a step of drying it. The present invention relates to a method for producing an agrochemical composition.

ADVANTAGE OF THE INVENTION According to this invention, in a fine granular agrochemical composition, peeling from the support | carrier of the agrochemical active ingredient at the time of a manufacturing process (especially drying process) and dispersion | spreading can be suppressed. That is, according to the present invention, in the production process, peeling of the agricultural chemical active ingredient during drying can be suppressed to a low level, and an expected component content can be obtained. Moreover, at the time of spraying, it is possible to suppress scattering of the peeled fine particles containing the agrochemical active ingredient, and to reduce the influence on neighboring crops and sprayers and the anxiety of neighboring residents.
Moreover, among the finely divided pesticide compositions according to the present invention,
-Liquid saccharides that do not crystallize at room temperature are converted liquid sugars containing reducing sugars,
-Agrochemical active ingredients containing one or more pesticidal active ingredients whose water solubility at 20 ° C is 100 ppm or more, especially pesticidal active ingredients whose water solubility at 20 ° C is 100 ppm or more are dinotefuran or tricyclazole some stuff,
According to each, peeling of the agrochemical active ingredient at the time of a manufacturing process and dispersion | spreading can be suppressed more notably.
Moreover, according to the fine-grained agricultural chemical composition according to the present invention, the mineral fine particles are silica sand containing 90% or more of particles having a particle size of 63 to 300 μm. Uniformity in soil treatment is maintained, and not only the expected biological effect is obtained, but also the scattering during spraying is small, and the influence on the sprayer and surrounding crops can be eliminated.
Furthermore, according to the method for producing a fine pesticide composition of the present invention, it is possible to produce a fine pesticide composition in which peeling of the pesticide active ingredient during the production process and spraying is suppressed.
The “liquid saccharide that does not crystallize at room temperature” is generally called molasses, and it is known that molasses can be used in agrochemical granules as a granulating aid and a hydrophilic binder ( Patent Document 3). It is also known that moisturizing agents including molasses can increase the activity of herbicides together with silicone surfactants (Patent Document 4). However, the saccharides in the prior art are only known to be used as supplementary agents in the production of agrochemical granules and in the granules themselves. There is no knowledge about a fine particulate agricultural chemical composition. In addition, the use of molasses in combination with a water-soluble binder as in the present invention, and the fact that such combined use has a special effect on the peeling of the pesticidal active ingredient from the fine pesticide composition, Of course, it has never been known at all, not to mention or suggest.

The particulate pesticide composition of the present invention will be specifically described.
In the present invention, a certain component is “covered and contained in mineral fine particles” means that a certain component is present directly or indirectly through other components in part or all of the surface of the mineral fine particles. This means that the case where a certain component is also present inside the mineral fine particles depending on the shape of the mineral fine particles is also included.
(1) Agrochemical active ingredient The agrochemical active ingredient used in the present invention is not particularly limited, and includes agrochemical activities used in the agricultural field, such as insecticides, fungicides, herbicides, nematicides, plant growth regulators, and the like. A component is mentioned, It can use combining 1 type (s) or 2 or more types.

  The content of the pesticidal active ingredient in the finely divided pesticide composition of the present invention is an amount necessary for exhibiting the intended effect and is not particularly limited. For example, the pesticide is used with respect to 100 parts by weight of the finely divided pesticide composition. The total amount of active ingredients is 0.01 to 20 parts by weight, preferably 0.1 to 5 parts by weight.

Specific examples of the pesticidal active ingredient include the following.
Tricyclazole, azoxystrobin, IBP, iminotadine acetate, kasugamycin, validamycin, ferimzone, BPMC, cartap hydrochloride, dinotefuran, clothianidin, imidacloprid, mepronyl, pencyclon, EDDP, phenoxanyl, flutolanil, fusaride, diclocimet, isoprothiolane MP , Etofenprox, methoxyphenozide, buprofezin, MEP, tebufenozide, PAP, silafluophene, ethiprole, bensultap and the like. Of these, preferred are those containing one or more of dinotefuran, tricyclazole, pencyclon and buprofezin, and more preferred are those containing dinotefuran and tricyclazole, and those containing pencyclon and / or buprofezin in addition to dinotefuran and tricyclazole. .

In a conventional finely divided pesticide composition containing a pesticide active ingredient, a water-soluble binder, and mineral fine particles, when a pesticide active ingredient having a water solubility of 100 ppm or more at 20 ° C. is formulated, the pesticide activity during the manufacturing process and spraying While the peeling of the fine particles containing the components is very large, the peeling mitigating effect of the particulate agricultural chemical composition of the present invention is particularly remarkable in the agricultural chemical active ingredients having a water solubility at 20 ° C. of 100 ppm or more.
Therefore, among the above-mentioned pesticidal active ingredients, tricyclazole, azoxystrobin, IBP, iminotadine acetate, kasugamycin, validamycin, ferrimzone, BPMC, cartap hydrochloride, dinotefuran are pesticidal active ingredients having a water solubility at 20 ° C. of 100 ppm or more. , Clothianidin, and imidacloprid are preferable, and the particulate pesticide composition of the present invention containing these pesticidal active ingredients is suitable.

  The finely divided pesticide composition of the present invention can be used in any combination of one or more of the above pesticidal active ingredients according to the purpose.

  The pesticidal active ingredient in the fine granular pesticidal composition of the present invention can be mixed and ground in advance with clay, calcium carbonate, talc, acid clay, diatomaceous earth, white carbon, etc., if necessary, and added as a bulk powder.

(2) Liquid saccharides that do not crystallize at room temperature The liquid saccharides that do not crystallize at room temperature in the finely divided pesticide composition of the present invention are generally called molasses.
As the types of sugars, sugarcane molasses, sugar beet molasses, refined molasses molasses, ice molasses and invert sugar containing reducing sugar such as sucrose hydrolyzed into glucose and fructose And those containing invert sugar together with non-reducing sugars such as sucrose, etc., preferably those containing 20% or more of reducing sugar, more preferably those containing 40% or more of reducing sugar, Liquid sugar containing about 50% is particularly preferred. Liquid sugar containing 45% to 54% reducing sugar is also particularly preferable.
Moreover, although the addition amount of the said saccharide | sugar is not limited, For example, it is 0.1-1.0 weight part with respect to 100 weight part of fine-grained agricultural chemical compositions, Preferably it is 0.3-0.7 weight part.

(3) Mineral substance fine particles The mineral substance fine particles in the fine granular agricultural chemical composition of the present invention can include quartz sand, pumice, calcium carbonate, clay and the like, preferably quartz sand. In the present invention, the particle size distribution of the mineral fine particles is preferably such that the particles of 63 to 300 μm are 90% or more. Mineral fine particles whose upper limit of the particle size distribution is 300 μm retains adhesion to the target crop in foliage treatment and uniformity in soil treatment, and provides the expected biological effect. In addition, the mineral fine particles whose particle size distribution has a lower limit of 63 μm has a small scattering at the time of spraying, and the influence on the sprayer and surrounding crops can be eliminated.
The “63-300 μm particles” or “63-300 μm particle size” means particles obtained by sieving with a sieve having openings of 300 μm and 63 μm.
The amount of mineral fine particles added is, for example, 85 to 99 parts by weight, preferably 93 to 97 parts by weight, based on 100 parts by weight of the fine pesticide composition.

(4) Water-soluble binder The particulate pesticide composition of the present invention contains a water-soluble binder, and as a water-soluble binder, polyvinyl alcohol, polyvinyl pyrrolidone, carboxymethyl cellulose and the like can be added. Is preferred.
Further, in the present invention, after coating the agrochemical active ingredient with mineral fine particles containing 90% or more of particles having a particle size of 63-300 μm, fine powder such as white carbon, clay, calcium carbonate, etc. is added to prevent caking. In particular, white carbon is preferred. The addition amount of the water-soluble binder is, for example, 0.1 to 1.0 part by weight, preferably 0.3 to 0.8 part by weight.

In the finely divided agrochemical composition of the present invention, one or two or more surfactants, stabilizers, pH adjusters, colorants and the like can be further added as auxiliary agents other than those described above. .
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 Ethylene alkyl phenyl ether, polyoxyethylene dialkyl phenyl ether, polyoxyethylene alkyl phenyl ether formalin condensate, polyoxyethylene polyoxypropylene block polymer, alkyl polyoxyethylene polypropylene block polymer ether, polyoxyethylene alkylamine, polyoxyethylene fatty acid Amide, polyoxyethylene fatty acid bisphenyl ether, polyalkylene benzyl ester Nyl 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. Ionic surfactants, alkyl sulfates, polyoxyethylene alkyl ether sulfates, polyoxyethylene alkyl phenyl ether sulfates, polyoxyethylene styryl phenyl ether sulfates, alkyl benzene sulfonates, lignin sulfonates, alkyl sulfosuccinates , Naphthalene sulfonate, alkyl naphthalene sulfonate, salt of formalin condensate of naphthalene sulfonic acid, formal of alkyl naphthalene sulfonic acid Anionic surfactants such as salt of fatty acid 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 thereof include amphoteric surfactants such as amino acid type and betaine type.
Examples of the stabilizer include fatty acids, ascorbic acid, hydrocarbon solvents, urea and the like.
Examples of the pH adjuster include citric acid, trisodium citrate, sodium carbonate, phosphoric acid and the like.
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.

  The finely divided pesticide composition of the present invention is particularly useful as a foliar spray for the purpose of controlling pests of late pests in paddy rice cultivation, a soil treatment for the purpose of controlling pests in the soil in fields, etc. These are not limited. Also, the application rate is not particularly limited, but is, for example, 1 kg to 30 kg per 10 ares, preferably 3 kg to 20 kg can be applied.

The finely divided agricultural chemical composition of the present invention can be produced by combining ordinary techniques in this technical field. For example, a surface coating method (coating method), which is a method of coating the surface of mineral fine particles having an appropriate particle size distribution with a pesticide raw material together with a binder, can be employed.
Moreover, according to the production method of the present invention including the following steps (a) to (c), fine particles in which peeling of the agrochemical active ingredient during the production process and spraying is suppressed, as in the fine particulate agrochemical composition of the present invention. A pesticide composition can be produced:
(A) a step of wetting mineral fine particles with a mixed aqueous solution of a water-soluble binder and a liquid saccharide that does not crystallize at room temperature;
(B) a step of coating the mineral fine particles with an agrochemical active ingredient; and (c) a step of drying the coated mineral fine particles.
In the production method of the present invention, preferably, the fine particles of mineral substance wetted with a mixed aqueous solution of a water-soluble binder and a liquid saccharide that does not crystallize at room temperature are coated with an agrochemical active ingredient, and then dried and sieved. Including. As a device that can be used in the coating process, there are a mixer (for example, a Nauta mixer manufactured by Hosokawa Micron Corporation) in which a screw revolves along the inner wall of a conical container, and two cylindrical containers combined in a V shape. A rotating mixer (for example, a V-type mixer manufactured by Fuji Paudal), a mixer whose blades on the bottom and sides of the container rotate at high speeds (for example, a vertical granulator manufactured by Pauleck, a high-grade manufactured by Fukae Powtech Co., Ltd.) Speed mixer) and the like, but is not limited thereto. As a device that can be used in the drying process, a dryer (for example, a fluidized bed dryer manufactured by Fuji Powder Co., Ltd.) that flows particles by sending hot air, or a device that vibrates while sending hot air, flows the particles. (For example, a vibratory fluid dryer manufactured by Fuji Paudal, a vibratory dryer manufactured by Shinko Electric Co., Ltd.) and the like to be used. In addition, as an apparatus that can be used in the sieving step, there is a vibration sieve manufactured by Dalton Co., but not particularly limited.

EXAMPLES Specific examples of the present invention will be described, but the present invention is not limited to these examples. In the following examples and comparative examples, “part” means “part by weight” and “%” means “% by weight”. The total amount of each raw material exceeds 100 parts because water in a 15% aqueous solution of polyvinyl alcohol evaporates by drying.

Example 1
A binder aqueous solution prepared by mixing 3.0 parts of a 15% aqueous solution of polyvinyl alcohol and 0.5 parts of a liquid sugar (Nitto High Sweet Deluxe, manufactured by Mitsubishi Chemical Foods Co., Ltd.) containing about 50% of a reducing sugar, was added to particles of 63 to 300 μm. It was added to 95.05 parts of silica sand containing 90% or more to wet the whole. The raw powder previously mixed with 0.35 part of dinotefuran and 2.65 parts of calcium carbonate is added to this and mixed and coated, and further 1.0 part of white carbon is added and coated. Thereafter, it is dried with a fluidized bed dryer at a hot air temperature of 80 ° C. for 5 minutes and sieved with a sieve having openings of 300 μm and 63 μm to remove particles of 300 μm or more and particles of 63 μm or less. Got.

(Example 2)
A binder aqueous solution prepared by mixing 3.6 parts of a 15% aqueous solution of polyvinyl alcohol and 0.5 part of a liquid sugar (Nitto High Sweet Deluxe, manufactured by Mitsubishi Chemical Foods) containing about 50% of a reducing sugar, was added to particles of 63 to 300 μm. It was added to 94.96 parts of silica sand containing 90% or more to wet the whole. To this, 0.35 parts of dinotefuran, 0.5 part of tricyclazole and 2.15 parts of calcium carbonate were added in advance and mixed for coating. Further, 1.0 part of white carbon was added and mixed for coating. Thereafter, it is dried for 5 minutes at a hot air temperature of 80 ° C. by a vibration fluidized dryer, and sieved with a sieve having openings of 300 μm and 63 μm, except for particles having a particle size of 300 μm or more and particles having a particle size of 63 μm or less. Got.

(Example 3)
A binder aqueous solution prepared by mixing 3.6 parts of a 15% aqueous solution of polyvinyl alcohol and 0.5 part of a liquid sugar (Nitto High Sweet Deluxe, manufactured by Mitsubishi Chemical Foods) containing about 50% of a reducing sugar, was added to particles of 63 to 300 μm. It was added to 95.46 parts of silica sand containing 90% or more to wet the whole. To this, 0.35 parts of dinotefuran, 0.5 parts of tricyclazole, 1.5 parts of pencyclone and 0.65 parts of calcium carbonate were added in advance and mixed, and 0.5 parts of white carbon was further added. And mixed coated. Thereafter, it is dried with a fluidized bed dryer at a hot air temperature of 80 ° C. for 5 minutes and sieved with a sieve having openings of 300 μm and 63 μm to remove particles of 300 μm or more and particles of 63 μm or less. Got.

Example 4
A binder aqueous solution prepared by mixing 3.0 parts of a 15% aqueous solution of polyvinyl alcohol and 0.5 parts of a liquid sugar (Nitto High Sweet Deluxe, manufactured by Mitsubishi Chemical Foods Co., Ltd.) containing about 50% of a reducing sugar, was added to particles of 63 to 300 μm. It was added to 95.55 parts of silica sand containing 90% or more, and the whole was moistened. To this, 0.35 parts of dinotefuran, 0.5 parts of tricyclazole, 1.0 part of buprofezin and 1.15 parts of calcium carbonate were added and mixed and coated, and 0.5 parts of white carbon was further added. And mixed coated. Thereafter, it is dried for 5 minutes at a hot air temperature of 80 ° C. by a vibration fluidized dryer, and sieved with a sieve having openings of 300 μm and 63 μm, except for particles having a particle size of 300 μm or more and particles having a particle size of 63 μm or less. Got.

(Comparative Example 1)
3.6 parts of a 15% aqueous solution of polyvinyl alcohol was added to 95.46 parts of silica sand containing 90% or more of particles of 63 to 300 μm to wet the whole. To this, 0.35 parts of dinotefuran, 0.5 part of tricyclazole and 2.15 parts of calcium carbonate were added in advance and mixed for coating. Further, 1.0 part of white carbon was added and mixed for coating. Thereafter, it was dried with a fluid bed dryer at a hot air temperature of 80 ° C. for 5 minutes, and sieved with a sieve having openings of 300 μm and 63 μm, and particles of 300 μm or more and particles of 63 μm or less were removed to obtain a fine agricultural chemical composition. .

(Comparative Example 2)
3.6 parts of a 15% aqueous solution of polyvinyl alcohol was added to 95.96 parts of silica sand containing 90% or more of 63-300 μm particles, and the whole was moistened. To this, 0.35 parts of dinotefuran, 0.5 parts of tricyclazole, 1.5 parts of pencyclone and 0.65 parts of calcium carbonate were added in advance and mixed, and 0.5 parts of white carbon was further added. And mixed coated. Thereafter, it was dried with a vibrating fluid dryer at a hot air temperature of 80 ° C. for 5 minutes, and sieved with a sieve having openings of 300 μm and 63 μm to remove particles of 300 μm or more and particles of 63 μm or less to obtain a fine agricultural chemical composition. .

(Comparative Example 3)
A binder aqueous solution in which 0.5 part of sucrose, which is a crystalline saccharide, is dissolved in 3.0 parts of a 15% aqueous solution of polyvinyl alcohol is added to 95.55 parts of silica sand containing 90% or more of 63-300 μm particles. The whole was moistened. To this, 0.35 parts of dinotefuran, 0.5 parts of tricyclazole, 1.0 part of buprofezin and 1.15 parts of calcium carbonate were added and mixed and coated, and 0.5 parts of white carbon was further added. And mixed coated. Thereafter, it was dried with a vibrating fluid dryer at a hot air temperature of 80 ° C. for 5 minutes, and sieved with a sieve having openings of 300 μm and 63 μm to remove particles of 300 μm or more and particles of 63 μm or less to obtain a fine agricultural chemical composition. .

(Comparative Example 4)
A binder aqueous solution prepared by dissolving 0.5 part of fructose, which is a crystalline reducing sugar, in 3.0 parts of a 15% aqueous solution of polyvinyl alcohol is added to 95.55 parts of silica sand containing 90% or more of 63-300 μm particles. The whole was moistened. To this, 0.35 parts of dinotefuran, 0.5 parts of tricyclazole, 1.0 part of buprofezin and 1.15 parts of calcium carbonate were added and mixed and coated, and 0.5 parts of white carbon was further added. And mixed coated. Thereafter, it was dried with a fluidized bed dryer at a hot air temperature of 80 ° C. for 5 minutes, and sieved with a sieve having openings of 300 μm and 63 μm to remove particles of 300 μm or more and particles of 63 μm or less to obtain a fine agricultural chemical composition. .

(Comparative Example 5)
A binder aqueous solution obtained by mixing 3.0 parts of a 15% aqueous solution of polyvinyl alcohol with 0.5 parts of glycerin, which is a highly viscous solvent, is added to 95.55 parts of silica sand containing 90% or more of 63-300 μm particles. The whole was moistened. To this, 0.35 parts of dinotefuran, 0.5 parts of tricyclazole, 1.0 part of buprofezin and 1.15 parts of calcium carbonate were added and mixed and coated, and 0.5 parts of white carbon was further added. And mixed coated. Thereafter, it was dried with a fluidized bed dryer at a hot air temperature of 80 ° C. for 5 minutes, and sieved with a sieve having openings of 300 μm and 63 μm to remove particles of 300 μm or more and particles of 63 μm or less to obtain a fine agricultural chemical composition. .

Ａ：静置乾燥品中の農薬活性成分含有率
Ｂ：流動層乾燥品中の農薬活性成分含有率 The peelability of the active ingredient in the above fine granular agrochemical composition was evaluated by the following test.
Test Example 1 Measurement of Drying Component Decrease Rate In the production process of the fine pesticide composition of Examples 1 to 4 and Comparative Examples 1 to 5, the ratio of the agrochemical active ingredient scattered by the hot air of fluidized bed drying is shown below. Determined by After coating and coating the raw powder containing the agricultural chemical active ingredient and white carbon, a part of the powder is collected and dried for 30 minutes in a dryer adjusted to 60 ° C., and sieved with a sieve having openings of 300 μm and 63 μm. Except for particles having a particle size of 300 μm or more and particles having a particle size of 63 μm or less, a finely dried agrochemical composition was obtained. The content of the pesticidal active ingredient was measured together with the finely divided pesticide composition obtained by fluidized bed drying, and the component reduction rate during drying was calculated by the following formula (fluidized bed). In addition, the lower the component reduction rate during drying, the better.

A: Pesticide active ingredient content ratio in stationary dry product B: Pesticide active ingredient content ratio in fluidized bed dry product

Ｃ：試験前の農薬活性成分含有率
Ｄ：試験後の農薬活性成分含有率
結果を表１に示す。 Test Example 2 Measurement of Pesticide Active Component Peeling Rate in Fine Pesticide Composition 10 g of the fine pesticide composition of Examples 1 to 4 and Comparative Examples 1 to 5 are placed in a glass filter (model number 11G-2), and the air volume from the bottom of the filter Ventilation was conducted for 2 minutes at a rate of 30 L / min. The sample remaining on the glass filter was collected, and the peel rate was calculated by the following formula. The lower the peeling rate, the better. However, 10% or less is a practical allowable value.

C: Pesticide active ingredient content before test D: Pesticide active ingredient content after test Table 1 shows the results.

  As is clear from the results shown in Table 1, the particulate pesticide compositions of the examples according to the present invention have significantly less component reduction rate and peeling rate during fluidized bed drying than the comparative examples. That is, in the particulate agricultural chemical composition according to the present invention, peeling of the agricultural chemical active ingredient at the time of drying and spraying in the production process is remarkably suppressed.

  The particulate pesticide composition of the present invention mitigates the reduction of active ingredients during drying in the production process, and greatly reduces the separation of active ingredients from the formulation, thereby reducing production costs and scattering during production and spraying. It is useful as a composition capable of suppressing the above.

Claims (6)

  A fine pesticide composition comprising a mineral fine particle coated with a pesticide active ingredient, a water-soluble binder, and a liquid saccharide that does not crystallize at room temperature.   The finely divided pesticide composition according to claim 1, wherein the liquid saccharide that does not crystallize at room temperature is a converted liquid sugar containing a reducing sugar.   The finely divided pesticide composition according to claim 1 or 2, wherein the pesticide active ingredient contains one or more pesticide active ingredients whose water solubility at 20 ° C is 100 ppm or more.   The fine-grained agricultural chemical composition according to claim 1, wherein the mineral fine particles are silica sand containing 90% or more of particles having a particle size of 63 to 300 μm.   The particulate agricultural chemical composition of Claim 3 whose agricultural chemical active ingredient whose water solubility in 20 degreeC is 100 ppm or more is dinotefuran or tricyclazole.   A step of wetting mineral fine particles with a mixed aqueous solution of a water-soluble binder and a liquid saccharide that does not crystallize at room temperature, a step of coating the mineral fine particles with an agrochemical active ingredient, and a step of drying the coated mineral fine particles A method for producing a finely divided pesticide composition.