JPH10287505A - Agrochemical composition to be applied on water surface, and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce an agrochemical composition capable of efficiently floating on a water surface and extending thereon and manifesting high controlling activities and low persistence in a soil by mixing a specific agrochemical active ingredient, a hollow organic powder, a solid carrier and an adjuvant, and forming the mixed components. SOLUTION: The objective composition of 100 pts.wt. in a granular or a tablet form is obtained by mixing (A) 0.01-80 pts.wt. agrochemical active ingredient of solid at a normal temperature [e.g. α,α,α-trifluoro-3'-isopropoxy-o- trianilide (generally called as flutolanil)], (B) 0.0001-30 pts.wt. hollow organic powder (e.g. hollow plastic resin powder) of a water-insoluble or slightly soluble resin, having preferably >=40 deg.C melting temperature, <1.0 specific gravity and <=2 mm average particle diameter, regulated so that the formulating ratio of the components A to B may be (1:1) to (100:1), (C) a solid carrier (e.g. potassium chloride) and (D) 0.1-15 pts.wt. adjuvant such as a surfactant, a binder, a disintegrator and a spreader, and forming the mixed components into a granular or a tablet form by a wet granulation or a compression molding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-applied pesticide composition obtained by uniformly mixing and molding a pesticidal active ingredient, a hollow organic powder, a solid carrier and an auxiliary agent which are solid at ordinary temperature, and a method for producing the same. More specifically, when the pesticide formulation is applied to a paddy field, the powdery pesticidal active ingredient efficiently floats and spreads on the water surface together with a floating base so that a high control effect and a low soil persistence can be exhibited. The present invention relates to a prepared water-applied agricultural chemical composition and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, floating pesticide granules have been proposed as a method for allowing a pesticidal active ingredient to act more efficiently. A method in which the active ingredient is retained on a water-floating carrier such as pumice and treated with a water-repellent agent as needed to suspend the granules themselves (JP-B-44-8600, JP-B-47-1240, JP-B-48-48). -1181, JP-A-48-1182, JP-A-55-139308 and JP-A-58-65.
No. 203),. A method in which an agrochemical active ingredient dissolved or dispersed in a wax-like substance is supported on a water-soluble carrier (Japanese Patent Laid-Open No. 57-37802).
JP-A-56-30901),. A method in which a poorly water-soluble or water-insoluble pesticide component is supported on a solid carrier composed of a water-soluble carrier and a film-forming substance (JP-A-60-142901); A method in which an active ingredient is dissolved or dispersed in a high boiling point solvent having a specific gravity of 1 or less and supported on a solid carrier (JP-A-63-17).
802),

[0003] H. L. A method of dissolving or dispersing an active ingredient in a high-boiling solvent having a specific gravity of 1 or less containing a surfactant having a B of 6 or less and supporting the active ingredient on a solid carrier (Japanese Patent Laid-Open No. 1-2546).
04 publication),. A method in which an active ingredient is dissolved or dispersed in an oil having a specific gravity of 1 or less and supported on a solid carrier to form an oil film on a water surface (JP-A-3-193705); A method in which an active ingredient is supported on a solid carrier comprising a solid wax-like substance and a water-soluble carrier (JP-A-7-101805)
Publication), and the like.

[0004]

However, these methods aim at effective utilization of the pesticide active ingredient by promoting diffusion and elution of the pesticide active ingredient into water or reducing soil adsorption.
It is inadequate in practical use and requires complicated operations in manufacturing. In other words, the method has a sufficient oil absorption capacity, but has the disadvantage that the granules themselves are lightened, so they are easily affected by wind and the like at the time of spraying, and the granules floating on the water surface after spraying are blown to one side by the wind is there. Also, the solid active ingredient must be dissolved in a suitable solvent and impregnated into the particulate base. Is a method in which the active ingredient is suspended on the water surface together with the wax-like substance to make it work effectively. However, the method is limited to a solid active ingredient having an affinity for the wax-like substance, and there are restrictions on production. In the method (1), the liquid active ingredient is floated on the water surface by using a water-soluble carrier and a film-forming substance. However, the amount of the liquid active ingredient carried is small, and there is a limit on the active ingredient that can be used.

The methods of (1) and (2) disclose higher alcohols, fatty acid esters, and higher boiling solvents having a specific gravity of 1 or less.
Although silicone oils and mineral oils are used, the dissolving power of these solvents is poor, and the active ingredients that can be dissolved are limited. Is an excellent method in which the powdery pesticidal active ingredient floats on the surface of the water together with the solid wax-like substance powder and spreads.However, the solid wax-like substance causes the fusion of the powder in the process of forming the formulation, so the difficulty is high. Need high temperature management,
Similarly, under harsh storage conditions, solid waxes also fuse. It is extremely desirable to make the pesticide active ingredient float and diffuse on the water surface to make it work effectively, but it is extremely desirable as a feature to be imparted to the pesticide composition applied to the water surface.However, in the conventional technology, the physical properties and amount of the active ingredient that can be used are limited. There is
There are problems such as the necessity of a step of dissolving in a solvent and the necessity of advanced control of the production process.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have obtained excellent effects which cannot be expected from conventional known techniques, and which can be obtained by a simple manufacturing method. An agrochemical composition and a method for producing the same have been found. The present invention relates to a pesticidal composition which is solid at room temperature, a hollow organic powder, a solid carrier and an auxiliary agent, which are uniformly mixed, wet-granulated or compression-molded, and which is applied to a water-based pesticide composition. It does not require steps such as impregnation of components or their compatibility, and can be produced by only mixing and molding steps and by easy step management. Furthermore, by using the hollow organic powder, a large amount of voids can be easily formed in the pesticide composition applied to the surface of the water, and the voids ensure high floating properties, and the active components of the pesticide can effectively float and spread on the surface of the water. An object of the present invention is to provide a water-applied agricultural chemical composition and a method for producing the same.

The pesticidal active ingredient which is solid at room temperature for use in the present invention includes, for example, (1). α, α, α-trifluoro-3′-isopropoxy-o-toluanilide (generic name: flutranyl, hereinafter referred to as compound 1). (2). 3′-isopropoxy-o-toluanilide (generic name: mepronil, hereinafter referred to as compound 2). (3). 1- (4-chlorobenzyl) -1-cyclopentyl-3-phenylurea (generic name: pencyclone; hereinafter, referred to as compound 3). (4). 6- (3,5-dichlorophenyl-p-tolyl) pyridazin-3 (2H) -one (generic name: diclomedin, hereinafter referred to as compound 4). (5). Diisopropyl-1,3-dithiolan-2-ylidene malonate (general name: isoprothiolane, hereinafter referred to as compound 5). (6). 3-allyloxy-1,2-benzisoxazole-1,1-dioxide (generic name: probenazole,
Hereinafter, it is referred to as compound 6.)

(7). 1,2,5,6-tetrahydropyrrolo [3,2,1-ij] quinolin-4-one (generic name: pyroquilone, hereinafter referred to as compound 7). (8). 5-methyl-1,2,4-triazolo [3,4
-B] [1,3] benzothiazole (generic name: tricyclazole, hereinafter referred to as compound 8). (9). 4,5,6,7-tetrachlorofusalide (generic name: fusalide, hereinafter referred to as compound 9). Fungicides such as (10). 1-naphthyl methyl carbamate (generic name:
NCA, hereinafter referred to as compound 10). (11) 2-isopropylphenylmethyl carbamate (generic name: MIPC: hereinafter referred to as compound 11). (12). 2-secondary butylphenyl methyl carbamate (generic name: BPMC: hereinafter referred to as compound 12).

(13). 2-isopropoxyphenylmethyl carbamate (generic name: PHC; hereinafter, referred to as compound 13). (14). 3,4-xylylmethyl carbamate (generic name: MPMC, hereinafter referred to as compound 14). (15). S, S '-(2-Dimethylaminotrimethylene) bis (thiocarbato) (general name: Cartap, hereinafter referred to as compound 15). (16). (RS) -α-cyano-3-phenoxybenzyl (RS) -2,2-dichloro-1- (4-ethoxyphenyl) cyclopropanecarboxylate (generic name:
Cycloprothrin, hereinafter compound 16). (17). 2- (4-ethoxyphenyl) -2-methylpropyl-3-phenoxybenzyl ether (generic name:
Etofenprox, hereinafter referred to as compound 17). (18). N, N-dimethyl-1,2,3-trithian-5-ylamine (general name: thiocyclam, hereinafter referred to as compound 18).

(19). S, S'-2-dimethylaminotrimethylenedi-benzenethiosulfonate (generic name:
Bensultap, hereinafter referred to as compound 19). (20) 2-tert-butylimino-3-isopropyl-5-phenyl-1,3,5-thiadiazine-4-
ON (generic name: buprofezin, hereinafter referred to as compound 20). Insecticides such as (21). o-3-tert-butylphenyl-6-
Methoxy-2-pyridyl (methyl) thiocarbamate (generic name: pyributicarb, hereinafter referred to as compound 21). (22). 1- (1-methyl-1-phenylethyl)-
3-p-tolylurea (generic name: Daimulon, hereinafter referred to as compound 22). (23). 1- (2-chlorobenzyl) -3- (α, α
-Dimethylbenzyl) urea (code name: JC-94)
0, hereinafter referred to as compound 23). (24). 2-bromo-N- (α, α-dimethylbenzyl) -3,3-dimethylbutylamide (generic name: bromobutide, hereinafter referred to as compound 24).

(25). 2- (1,3-benzothiazol-2-yloxy) -N-methylacetanilide (generic name: mefenacet, hereinafter referred to as compound 25). (26). N- [2 '-(3'-methoxy) thienylmethyl] -N-chloroaceto-2,6-dimethylanilide (generic name: tenylchlor, hereinafter referred to as compound 26). (27). 2- (2-naphthyloxy) propionanilide (generic name: naproanilide, hereinafter referred to as compound 27). (28). (RS) -2- (2,4-dichloro-m-tolyloxy) propionanilide (generic name: clomeprop, hereinafter referred to as compound 28). (29). 4- (4-chloro-o-tolyloxy) butyric acid (generic name: MCPB, hereinafter referred to as compound 29) and esters thereof. (30). S-ethyl-4-chloro-o-tolyloxythioacetate (generic name: phenothiol, hereinafter referred to as compound 30). (31). 4- (2,4-dichlorobenzoyl) -1,
3-dimethylpyrazol-5-yltoluene-4-sulfonate (general name: pyrazolate, hereinafter referred to as compound 31).

(32). 2- [4- (2,4-dichlorobenzoyl) -1,3-dimethylpyrazol-5-yloxy] acetophenone (generic name: pyrazoxyfen,
Hereinafter, it is referred to as compound 32). (33). 2- [4- (2,4-dichloro-m-toluoyl) -1,3-dimethylpyrazol-5-yloxy] -4′-methylacetophenone (generic name: benzophenap; hereinafter referred to as compound 33). (34). N ² -N ⁴ - diethyl-6-methylthio -
1,3,5-triazine-2,4-diamine (generic name:
Simethrin, hereinafter referred to as compound 34). (35). N ² -N ⁴ -diisopropyl-6-methylthio-1,3,5-triazine-2,4-diamine (generic name: promethrin, hereinafter referred to as compound 35). (36). N ^2- (1,2-dimethylpropyl) -N ⁴
-Ethyl-6-methylthio-1,3,5-triazine-
2,4-diamine (generic name: dimethamethrin, hereinafter referred to as compound 36). (37). 4-nitrophenyl-2,4,6-trichlorophenyl ether (general name: chloronitrophen, hereinafter referred to as compound 37).

(38). 5- (2,4-dichlorophenoxy) -2-nitroanisole (generic name: chloromethoxyphene, hereinafter referred to as compound 38). (39). Methyl-5- (2,4-dichlorophenoxy) -2-nitrobenzoate (generic name: bifenox, hereinafter referred to as compound 39). (40). 2-Amino-3-chloro-1,4-naphthoquinone (generic name: quinoclamin, hereinafter referred to as compound 40). (41). S-2-benzenesulfonamidoethyl-
O, O-diisopropyl-phosphorodithioate (generic name: Benslide, hereinafter referred to as compound 41). (42). N- (1-ethylpropyl) -2,6-dinitro-3,4-xylidine (generic name: pendimethalin, hereinafter referred to as compound 42). (43). Methyl-α- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -O-toluate (generic name: bensulfuronmethyl; hereinafter, compound 4)
3). (44). 5- (4,6-dimethoxypyrimidine-2-
Ilcarbamoylsulfamoyl) -1-methylpyrazole-4-carboxylate (generic name: pyrazosulfuronethyl, hereinafter referred to as compound 44).

(45). 3- (4,6-dimethoxy-
1,3,5-trizin-2-yl) -1- [2- (2-
[Methoxyethoxy) phenylsulfonyl] urea (generic name: sinosulfuron, hereinafter referred to as compound 45). (46). 1- (2-chloroimidazo [1,2-a] pyridin-3-ylsulfonyl) -3- (4,6-dimethoxy-2-pyrimidinyl) urea (code name: TH-9)
13, hereinafter referred to as compound 46). (47). 5-tert-butyl-3- (2,4-dichloro-5-isopropoxyphenyl) {1,3,4-
Oxadiazol-2 (3H) -one (generic name: oxadiazon, hereinafter referred to as compound 47). (48). S, S'-dimethyl-2-difluoromethyl-4-isobutyl-6-trifluoromethylpyridine-
3,5-dicarbothioate (generic name: dithiopyr, hereinafter referred to as compound 48). (49). 3-Chloro-4-methyl-6- (N-2-chloro-2-propenyl-N-phenylamino) pyridazine (code name: MT-128, hereinafter referred to as compound 49). Such as herbicides,

(50). 4′-chloro-2 ′-(α-hydroxybenzyl) isonicotinanilide (generic name: inabenfide, hereinafter referred to as compound 50). (51). (E)-(RS) -1- (4-chlorophenyl) -4,4-dimethyl-2- (1H-1,2,4-triazol-1-yl) pent-1-en-3-ol (general Name: uniconazole, hereinafter referred to as compound 51). (52). (2RS, 3RS) -1- (4-chlorophenyl) -4,4-dimethyl-2- (1H-1,2,4-
Triazol-1-yl) penten-3-ol (generic name: paclobutrazol, hereinafter referred to as compound 52). Agrochemical active ingredients of plant growth regulators such as can be exemplified, these agrochemical active ingredients can be used alone or in combination, but the present invention is not limited to these agrochemical active ingredients Absent.

The mixing ratio of the pesticide active ingredient is 10
The amount may be appropriately selected from the range of 0.01 to 80 parts by weight per 0 parts by weight, and is preferably in the range of 1 to 50 parts by weight. As the hollow organic powder used in the present invention,
Any hollow resin powder having a specific gravity of less than 1.0 and an average particle diameter of 2 mm or less may be used, and examples thereof include polyethylene, polystyrene, biodegradable plastic, and acrylonitrile-based plastic resin powder. May be used alone or as a mixture. The compounding ratio may be appropriately selected from the range of 0.0001 to 30 parts by weight with respect to 100 parts by weight of the pesticidal composition, and preferably 0.01 to 30 parts by weight. The range is from 10 to 10 parts by weight.

The mixing ratio of the pesticidal active ingredient and the hollow organic powder may be appropriately selected from the range of 1: 1 to 1000: 1, and is preferably selected from the range of 10: 1 to 500: 1. Can be. As solid carriers, potassium chloride, sodium chloride, sodium hydrogen carbonate, ammonium sulfate, urea, sodium carbonate, potassium carbonate, sodium sulfate,
Examples thereof include sodium benzoate, soluble starch, sucrose, bentonite, clay, diatomaceous earth, and talc, and these solid carriers may be used alone or in combination. Organic powder,
What is necessary is just to mix | blend so that it may become 100 weight part as an agricultural chemical composition together with an auxiliary agent.

The auxiliary can be selected from surfactants, binders, disintegrants, spreaders and the like usually used in agricultural chemical formulations. Examples of the surfactant include sulfonic acid surfactants such as alkylsulfonic acid, alpha-olefinsulfonic acid, ligninsulfonic acid, alkylbenzenesulfonic acid, alkylnaphthalenesulfonic acid, formalin condensate of naphthalenesulfonic acid, and dialkylsulfosuccinate, and the like. Of sodium, potassium, magnesium, calcium, ammonium, ethanolamine,
Salts such as diethanolamine and triethanolamine, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl allyl ether sulfate,
Sulfate surfactants such as polyoxyethylene styryl phenyl ether sulfate, polyoxyethylene phenylalkyl allyl ether sulfate, polyoxyalkylene glycol sulfate, higher alcohol sulfate, fatty acid ester sulfate, phenylphenol (EO) sulfate, and the above inorganic or amine salt,

Polyoxyethylene alkyl ether phosphate, polyoxyethylene alkyl allyl phosphate, phenyl phenol (EO) phosphate, polyoxyethylene phenyl alkyl allyl ether phosphate, higher alcohol phosphate, polyoxyethylene tribenzyl phenol phosphate Phosphate-based surfactants and the like or the above-mentioned inorganic or amine salts, higher fatty acid salts, polycarboxylic acid-based surfactants and anionic surfactants such as the above-mentioned inorganic or amine salts, polyoxyethylene alkyl allyl ether, polyoxyethylene styryl Phenyl ether, polyoxyethylene alkyl ether, polyoxyethylene phenylalkyl allyl ether, polyoxyethylene sorbitan fatty acid ester, polyoxy In addition to ethylene polyoxypropylene block polymer, polyoxyethylene alkyl ester, acetylenic diol, alkynylene polyoxyethylene diol, sorbitan fatty acid ester, alkyl aryl ether formalin condensate, etc., fluorine-based and silicone-based nonionic surfactants These anionic surfactants or nonionic surfactants can be used alone or as a mixture.

Other auxiliary agents include, for example, binders having disintegration spreadability of polyvinyl alcohols, polyacrylates, carboxymethyl cellulose salts, disintegrants, spreaders, white carbons, pulverization of magnesium stearate and the like. Auxiliaries, lubricants for compression molding and the like can be used. The mixing ratio of these adjuvants may be appropriately selected from the range of 0.1 to 15 parts by weight, and preferably 3 to 10 parts by weight, based on 100 parts by weight of the agricultural chemical composition.

The pesticidal composition for water application according to the present invention is prepared by uniformly mixing a pesticidal active ingredient which is solid at room temperature, a hollow organic powder, a solid carrier and an auxiliary, and extruding granulation, tumbling granulation, and dry compression. It can be easily manufactured by a conventional method such as a molding method,
At this time, the composition in which the pesticidal active ingredient floats efficiently on the water surface can be obtained by simply mixing the hollow organic powder with another composition without special treatment. The pesticidal composition of the present invention allows pesticidal active ingredients to float on water very effectively.
Can be expanded. Therefore, by applying to a paddy field, it is possible to exhibit an immediate effect and a sustained effect due to adhesion to a rice leaf sheath portion.
g, preferably 5-250 g. In addition, although the method of application to paddy fields can be of course applied uniformly over the entire surface, topical application of 10 to 200 g is an advantageous application method of the agricultural chemical composition of the present invention.

The pesticidal composition for water application according to the present invention can be further impregnated with a pesticidal active ingredient which is liquid at normal temperature and floated on the water surface together with the solid pesticidal active ingredient. Hereinafter, typical examples of the present invention will be illustrated, but the present invention is not limited thereto. In the examples, “parts” means “parts by weight”.

Example 1 49.0 parts of 90% powder of compound 1 (containing white carbon), a mixture of a plastic hollow body and water (Matsumoto Microsphere-F-30E)
A mixture of 5.0 parts, 46.0 parts of potassium chloride and 1.0 part of sodium polyacrylate (manufactured by Katayama Chemical Co., Ltd.) was mixed with 3.0 parts of a surfactant (Olfin E1010, manufactured by Nissin Chemical Industry Co., Ltd.).
Parts, 0.5 part of polyvinyl alcohol (Gohsenol GL05, manufactured by Nippon Gohsei) is dissolved in 15 parts of water and kneaded,
Basket granulator equipped with a 1.5 mm screen (R
G-5 type, manufactured by Kikusui Seisakusho Co., Ltd.)
Drying and sizing were performed by blowing hot air at 0 to 80 ° C. to obtain granules. [Examples 2 to 6] Granules having the composition shown in Table 1 were used in Example 1.
Was obtained in the same manner as described above.

[0024]

[Table 1] 1): White carbon powder 2): Magnesium stearate powder 3): Mixture of 10% plastic hollow body and 90% water

[Comparative Example 1] Granules were obtained in the same manner as in Example 1, except that the hollow plastic body (10%) was replaced with potassium chloride. [Comparative Example 2] From the plastic hollow body (10%) in Example 1, the plastic hollow body was replaced with a Shirasu balloon.
Similarly, granules were obtained.

The physical properties (water surface floatability) of the water surface application composition of the present invention will be described with reference to the following test examples. That is, when the composition for water application according to the present invention is applied to the surface of water, the active ingredient floats on the water surface quickly. [Test Example 1] Water surface buoyancy test In a 100 cm x 100 cm x 10 cm stainless steel container, water was poured to a depth of 5 cm and allowed to stand, and the samples of Examples 1 to 6 and Comparative Examples 1 and 2 were placed in a container. Treat gently in the center, and 1 hour after treatment, place glass fiber filter paper (diameter: 47
mm) was floated gently and collected when the filter paper was completely soaked. After the filter paper was transferred to a test tube and extracted with a solvent, the amount of each compound attached to the filter paper was analyzed. The floating rate was determined by assuming that the amount of the compound per filter paper area when the total amount of the compound was floated and spread uniformly was 100. Table 2 shows the results.

[0027]

[Table 2] 1): Floating ratio of compound 1 2): Floating ratio of compound 26 The floating ratio of Example 3 in Table 2 was obtained by packaging 5 g of the composition obtained in Example 3 with a polyvinyl alcohol film. used. From the results in Table-2, the water-applied agrochemical composition of the present invention exhibits excellent water-floating properties, and the suspended active ingredient is rapidly diffused.

Test Example 2 The preparations of Examples 1 to 3 and Comparative Examples 1 and 2 were treated at a predetermined dose on the water surface of a pot in which rice was grown at the 8 to 12 leaf stage, and after 6 hours, One and two weeks later, the sclerotium of Rhizoctonia solani was spread on the water surface and inoculated. After inoculation, the cells were cultured at 25 ° C / 100% humidity for 24 hours and then placed at 25 ° C / 95% humidity. One week after the inoculation, the maximum lesion height was investigated, and the control value was calculated by the following formula in comparison with the untreated plot.

(Equation 1) A: Highest lesion height in the chemical treatment area B: Highest lesion height in the non-treatment area The results are shown in Table-3.

[0029]

[Table 3] Note: ai is an active ingredient. The control value of Example 2 in Table 3 was obtained by packaging 5 g of the composition obtained in Example 2 with a polyvinyl alcohol film. Table 3 shows that the pesticide composition applied to the surface of the water of the present invention exhibits an excellent control effect.

Claims (4)

[Claims] 1. A water-applied pesticide composition obtained by uniformly mixing and molding a pesticidal active ingredient, a hollow organic powder, a solid carrier and an auxiliary agent which are solid at ordinary temperature. 2. The water-applied pesticide composition according to claim 1, wherein the hollow organic powder has a melting point of 40 ° C. or higher, a specific gravity of less than 1.0, and is insoluble or hardly soluble in water. 3. The pesticide composition for water application according to claim 1, wherein the pesticide composition for water application is a granule or a tablet. 4. A method for producing a pesticide composition to be applied to a water surface, which comprises uniformly mixing a pesticidal active ingredient, a hollow organic powder, a solid carrier and an auxiliary agent which are solid at ordinary temperature, and subjecting the mixture to wet granulation or compression molding.