JP2001240502A - Agrochemical composition for rice field, its manufacturing method and method for scattering the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agrochemical composition of which active ingredients do not remain in the treating points or are not blown by wind, having the excellent diffusion property when the composition is directly thrown for scattering over the flooded rice fields, especially so much for difficult points, a laborsaving dispersion agent including an active agrochemical ingredient of liquid in room temperature and an agrochemical composition containing high content of the active agrochemical ingredient liquid in room temperature. SOLUTION: The agrochemical composition for rice field prepared by wrapping granular composition comprising a liquid component containing an agrochemical active ingredient liquid is room temperature, hollow body and surfactant supported by the granular nucleus with a water soluble film bag and the method for scattering the agrochemical particles wherein 5-20 pieces per 10a of the above agrochemical composition are directly thrown in the flooded rice field are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an agricultural chemical composition for paddy fields to be directly sprayed on a water surface, a method for producing the same, and a method for spraying the same.

[0002]

2. Description of the Related Art At present, pesticide preparations include granules, powders,
Emulsions, wettable powders, flowables, granular wettable powders and the like are known. In recent years, labor-saving and reduced pesticides for spraying pesticides have been called for, and improvement of the formulation of pesticide chemicals has been demanded.

[0003] Under such circumstances, in recent years, small-sized preparations that can be sprayed simply by throwing from a ridge without entering a paddy field have been studied. These preparations are premised on being presumed to be non-uniformly sprayed on a paddy field, and preparations in which the pesticidal active ingredient floats on the water surface and diffuses in order to obtain good component diffusion properties are desired.

[0004] Many studies have been made to meet such demands, but in reality, no satisfactory agricultural chemical preparations have yet been obtained. For example, a method has been disclosed in which an emulsion containing a pesticidal component is packaged in a water-soluble film and treated in a flooded paddy field (Japanese Patent Publication No. 42-5240).
No.), after treatment, there was a problem that a large amount of pesticide components remained in the soil at the point of release.

Further, the pesticidal active ingredient is used in a particle size of 0.1 to 10 m.
m, impregnated and held in a synthetic resin foam, and packaged in a water-soluble film (JP-A-53-99327) or an active ingredient of an agrochemical having an apparent specific gravity of less than 1 and a particle size of 0.3 mm.
Preparations coated and coated on grain nuclei such as pumice or calcined perlite of up to 1.4 mm and packaged in a water-soluble film
No. 83701) is disclosed, but there is a problem in the diffusivity of the components because a part of the preparation is settled on the water floor at the treated point, and there is a problem with synthetic resin foam or pumice or calcined pearlite even after the treatment. Since many pesticidal active ingredients are still carried on the grain nucleus, not only the desired effect of the pesticide is not exerted, but also a harmful effect may be caused by blowing by the wind.

[0006] Further, a pesticidal composition comprising a poorly soluble or insoluble pesticidal active ingredient, a surfactant, water and, if necessary, an auxiliary, and a hollow organic powder added to a pesticidal composition applied to a water-applied suspension or milk suspension. A composition is also disclosed (Japanese Unexamined Patent Application Publication No.
No. 1-228303), which is a formulation in which a liquid formulation is sprayed directly on a paddy field. The labor saving of spraying agrochemicals is inferior to that of a water-soluble film packaged formulation. In some cases.

Furthermore, it has been difficult with these conventional techniques to obtain a labor-saving spray formulation containing a pesticidally active ingredient which is liquid at room temperature.

[0008]

DISCLOSURE OF THE INVENTION The present invention relates to a pesticide composition which is directly thrown into a flooded paddy field and sprayed thereon, wherein the pesticide active ingredient does not remain at the treatment point, and there is no wind blown by the wind. It is an object of the present invention to provide a composition having diffusibility, and in particular, to realize a labor-saving spray formulation containing a pesticidally active component which is liquid at ordinary temperature, which has been difficult until now. It is another object of the present invention to contain a high concentration of a pesticidally active ingredient which is liquid at ordinary temperature.

[0009]

Means for Solving the Problems The present inventors have intensively studied to obtain a labor-saving spray formulation containing a pesticidally active ingredient that is liquid at ordinary temperature as an active ingredient. As a result, the present pesticidal active ingredient was converted into a hollow body and a surfactant. It was also found that if it was made into a liquid material and supported on the grain nuclei, and then wrapped in a water-soluble film bag, it could be sprayed simply by throwing it from the ridge without entering the paddy field, and the diffusibility was good. Thus, the present invention has been completed.

[0010] That is, the present invention provides a paddy field characterized in that a granular composition comprising a pesticidal active ingredient, a hollow body and a surfactant which is liquid at ordinary temperature supported on a grain nucleus is packaged in a water-soluble film bag. The present invention provides an agricultural chemical composition for use.

[0011] The present invention also provides the paddy field pesticide composition,
It is intended to provide a method of spraying pesticide granules, characterized by directly throwing 5 to 20 per 10a into a flooded paddy field.

Further, the present invention provides a method for producing the above-mentioned paddy agricultural chemical composition.

[0013]

DETAILED DESCRIPTION OF THE INVENTION In the present specification, the term "agrochemical active ingredient which is liquid at normal temperature" refers to a pesticide active ingredient which is liquid at normal temperature itself, or a pesticide active ingredient which is solid at normal temperature in an appropriate solvent. Alternatively, it also includes those dispersed.

The agricultural chemical composition for a paddy field of the present invention is a liquid material containing a pesticidal active ingredient, a hollow body, and a surfactant which are liquid at room temperature in a grain nucleus (hereinafter, referred to as "liquid agricultural chemical composition").
Are packaged in a water-soluble film bag.

The pesticidal active ingredient used in the paddy field pesticide composition is used as a liquid substance by dissolving or suspending it in a solvent even if it is a solid, in addition to the liquid itself as described above. It is not particularly limited as long as it is generally used as a pesticide,
Either solid or liquid can be used, and it may be hardly soluble or easily soluble in water. Such pesticidal active ingredients include, for example, herbicides, fungicides,
Insecticides, plant growth regulators and the like can be mentioned, and particularly those preferably used advantageously for water application.

Among the pesticidal active ingredients used in the present invention, examples of those which are liquid at ordinary temperature include herbicides 2
-Methyl-4-chlorophenoxythioacetic acid-S-ethyl (phenothiol), S- (4-chlorobenzyl) N,
N-diethylthiocarbamate (benthiocarb), S
-Benzyl = 1,2-dimethylpropyl (ethyl) thiocarbamate (esprocarb), S-ethylhexahydro-1H-azepine-1-carbothioate (molinate), 2-chloro-2 ′, 6′-diethyl- N- (butoxymethyl) acetanilide (butachlor), 2-chloro-2 ′, 6′-diethyl-N- (2-propoxyethyl) acetanilide (pretilachlor), ethyl 4-
(4-chloro-o-tolyloxy) butyrate (MCPB)
Ethyl), the fungicide O, O-diisopropyl-S-
Benzylthiophosphate (IBP), insecticide O, O-dimethyl-O- (3-methyl-4-nitrophenyl) thiophosphate (MEP), (2-isopropyl-4-methylpyrimidyl-6) -Diethylthiophosphate (diazinone), dimethyldicarbethoxyethyldithiophosphate (marathon), O, O-dipropyl-O-4-methylthiophenylphosphate (propaphos), 2,3-dihydro-2, 2-dimethyl-7-benzo [b] furanyl = N-dibutylaminothio-N-methylcarbamate (carbosulfan), ethyl = N-
[2,3-dihydro-2,2-dimethylbenzofuran-7
-Yloxycarbonyl (methyl) aminothio] -N-
Isopropyl-β-alaninate (benflacarb),
(RS) -α-cyano-3-phenoxybenzyl = (R
And S) -2,2-dichloro-1- (4-ethoxyphenyl) cyclopropanecarboxylate (cycloprothrin).

Among the pesticidal components used in the present invention, examples of the pesticidal active component which is solid at room temperature include 2,4,6, -trichlorophenyl-4'-nitrophenyl ether which is a herbicide. Ter (CNP), α- (2-naphthoxy) propionanilide (naproanilide), 5-
Methyl (2,4-dichlorophenoxy) -2-nitrobenzoate (bifenox), S-1-methyl-1-phenylethyl = piperidine-1-carbothioate (dimipeperate), O-3-tert-butylphenyl = 6
-Methoxy-2-pyridyl (methyl) thiocarbamate (pyributicarb), (RS) -2-bromo-N-
(Α, α-dimethylbenzyl) -3,3-dimethylbutyramide (bromobutide), 2-benzothiazole-2-
Iloxy-N-methylacetanilide (mefenacet), 1- (α, α-dimethylbenzyl) -3- (paratolyl) urea (Dimron), methyl = α- (4,6-
Dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -O-toluate (bensulfuronmethyl);
1- (2-chloroimidazo [1,2-a] pyridine-3
-Ylsulfonyl) -3- (4,6-dimethoxypyrimidin-2-yl) urea (imazosulfuron), ethyl =
5- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -1-methylpyrazol-4-
Carboxylate (pyrazosulfuron-ethyl), 2-methylthio-4,6-bis (ethylamino) -s-triazine (simethrin), 2-methylthio-4,6-bis (isopropylamino) -s-triazine (promethrin) ), 2-methylthio-4-ethylamino-6- (1,
2-dimethylpropylamino) -s-triazine (dimetamethrin), 2,4-dichlorophenyl-3′-methoxy-4′-nitrophenyl ether (chromomethoxynil), 5-tert-butyl-3- (2,4- Dichloro-5-isopropoxyphenyl) -1,3,4-oxadiazolin-2-one (oxadiazone), 4- (2,
4-dichlorobenzoyl) -1,3-dimethyl-5-pyrazolyl-p-toluenesulfonate (pyrazolate), 2- [4- (2,4-dichlorobenzoyl) -1,
3-dimethylpyrazol-5-yloxy] acetophenone (pyrazoxifene), (RS) -2- (2,4-
Dichloro-m-tolyloxy) propionanilide (chromeprop), 2- [4- [2,4-dichloro-m-
Toluoyl) -1,3-dimethylpyrazol-5-yloxy] -4'-methylacetophenone (benzophenap), S, S'-dimethyl = 2-difluoromethyl-4
-Isobutyl-6-trifluoromethylpyridine-3,
5-dicarbothioate (dithiopyr), 2-chloro-
N- (3-methoxy-2-thenyl) -2 ′, 6′-dimethylacetanilide (thenylchlor), n-butyl-
(R) -2- [4- (2-Fluoro-4-cyanophenoxy) phenoxy] propionate (cyhalofopbutyl), 3- [1- (3,5-dichlorophenyl) -1-
Methylethyl] -2,3-dihydro-6-methyl-5
Phenyl-4H-1,3-oxazin-4-one (oxadichromefone), 3- (4-chloro-5-cyclopentyloxy-2-fluorophenyl) -5-isopropylidene-1,3-oxazolidine-2,4-dione ( Pentoxazone), 1- (diethylcarbamoyl) -3-
(2,4,6-trimethylphenylsulfonyl) -1,
2,4-triazole (Cafentrol), N-
{[(4,6-dimethoxypyrimidin-2-yl) aminocarbonyl]}-1-methyl-4- (2-methyl-2
H-tetrazol-5-yl) (azimsulfuron),
Methyl 2-[(4,6-dimethoxypyrimidine-2-
Yl) oxy] -6-[(E) -1- (methoxyimino) ethyl] benzoate (pyriminobac-methyl),
3'-isopropoxy-2-methylbenz which is a fungicide such as 4- (2-chloro-phenyl) -5-oxo-4,5 dihydro-tetrazole-1-carboxylic acid cyclohexyl-ethyl-amide (fentrazamide) Anilide (mepronil), α, α, α-trifluoro-3′-isopropoxy-O-toluanilide (flutranyl), 3,
4,5,6-tetrachloro-N- (2,3-dichlorophenyl) phthalamic acid (teclophthalam), 1- (4-
Chlorobenzyl) -1-cyclopentyl-3-phenylurea (pencyclone), 6- (3,5-dichloro-4-)
Methylphenyl) -3 (2H) -pyridazinone (dicromedin), methyl = N- (2-methoxyacetyl) -N
-(2,6-xylyl) -DL-alaninate (metalaxyl), (E) -4-chloro-α, α, α-trifluoro-N- (1-imidazole-1-yl-2-yl) Propoxyethylidene) -o-toluidine (triflumizole), [5-amino-2-methyl-6- (2,3,4,5,
6-pentahydroxycyclohexyloxy) tetrahydropyran-3-yl] amino-α-iminoacetic acid (kasugamycin), validamycin, 3-allyloxy-1,
2-benzoisothiazole-1,1-dioxide (probenazole), diisopropyl-1,3-dithiolane-
2-ylidene-malonate (isoprothiolane), 5-
Methyl-1,2,4-triazolo [3,4-b] benzothiazole (tricyclazole), 1,2,5,6-tetrahydropyrrolo [3,2,1-ij] quinolin-4-one (pyroquilone) , 5-ethyl-5,8-dihydro-8-
Oxo [1,3] dioxolo [4,5-g] quinoline-7
-Carboxylic acid (oxolinic acid), (Z) -2'-methylacetophenone = 4,6-dimethylpyrimidine-2
-Illhydrazone 4,5,6,7-tetrachlorophthalide (ferimzone), 3- (3,5-dichlorophenyl)
1-naphthyl-N-methylcarbamate (NA) which is an insecticide such as -N-isopropyl-2,4-dioxoimidazolidin-1-carboxamide (iplodione);
C), O, O-diethyl-O- (3-oxo-2-phenyl-2H-pyridazin-6-yl) phosphorothioe-
G (pyridafentione), O, O-dimethyl-O-3,
5,6-trichloro-2-pyridyl phosphorothioate (chloropyrifosmethyl), O, O-dimethyl-S-
(N-methylcarbamoylmethyl) dithiophosphate (dimethoate), O, S-dimethyl-N-acetylphosphoramidothioate (acephate), ethyl paranitrophenylthionobenzenephosphonate (EP
N), 2-secondary-butylphenyl-N-methylcarbamate (BPMC), 2- (4-ethoxyphenyl) -2-methylpropyl = 3-phenoxybenzyl =
Ether (ethofenprox), 1,3-bis (carbamoylthio) -2- (N, N-dimethylamino) propane hydrochloride (cartap), 5-dimethylamino-
1,2,3-trithiane oxalate (thiocyclam),
S, S'-2-dimethylaminotrimethylene di (benzenethiosulfonate) (bensultap), 2-tert-butylimino-3-isopropyl-5-phenyl-1,3,5,6 tetrahydro- Plant growth regulators such as 2H-1,3,5-thiadiazin-4-one (buprofezin) such as 4′-chloro-2 ′-(α-hydroxybenzyl) isonicotinanilide (inabenfide), (2R
S, 3RS) -1- (4-Chlorophenyl) -4,4-dimethyl-2- (1H-1,2,4-triazol-1-yl) pentan-3-ol (paclobutrazol) ),
(E)-(S) -1- (4-chlorophenyl) -4,4
-Dimethyl-2- (1H-1,2,4-triazole-1
-Yl) penta-1-en-3-ol (uniconazole) and the like. However,
The pesticidal active ingredient used in the present invention is not limited to the above.

These pesticidal active ingredients can be used alone or in combination of two or more. Usually, the total of the mixing ratio of the pesticide active ingredient is preferably 0.1 to 70 parts by weight based on 100 parts by weight of the paddy field pesticide composition.

In the present invention, when the pesticidal active ingredient is liquid at room temperature, it can be used as it is, but when it is solid at room temperature, it needs to be dissolved or dispersed in a solvent before use as a liquid. As a solvent that can be used for dissolving or suspending a solid pesticide active ingredient, a solvent generally used for pesticide formulations can be used as long as it does not react with a solute. Examples of specific solvents include dioctyl phthalate, methyl naphthalene, alkylpyrrolidone, phenyl xylyl ethane, glycerin, alkylene glycol, xylene, kerosene, methane series hydrocarbons, organic solvents such as fatty acid esters, polybasic acids, and silicone oils. And an aqueous solution of a water-soluble salt in an amount sufficient to make the water-soluble film insoluble in water, and the above-mentioned pesticidal active ingredient which is liquid at room temperature. The mixing amount of these solvents is usually 10
It is preferable that the amount be from 200 parts by weight to 200 parts by weight.

The agricultural chemical composition for paddy fields of the present invention must contain a hollow body. This hollow body solves the drawback of the conventional formulation, in which the pesticidal active ingredient is supported on the grain nucleus, the problem of part of the formulation sedimenting at the treatment point. Has the effect of enabling small-volume spray formulation without the need for

In the present invention, any hollow body having a shell structure and having a single cell or having two or more closed cells, that is, a cell having a bubble structure may be used. Any of inorganic and organic substances may be used as long as they have a particle size of, and are not particularly limited. In addition, it is preferable that the particle diameter of this hollow body is smaller than the particle diameter of the particle core described later.

Specific examples of this hollow body include inorganic substances such as foamed shirasu made of shirasu, phyllite fired with an aluminosilicate system, microballoons fired with sodium silicate or borax, fly ash, pumice stone, and ceramic hollow bodies. And organic substances such as phenol microballoons made of phenol resin, ecosphere made of epoxy resin, polyurethane foam made of polyurethane, and microsphere made of vinylidene chloride-acrylonitrile copolymer. When microspheres are used as the hollow body, it is usually preferable to dilute it 5 to 10 times with water, calcium carbonate, titanium oxide or the like.

These hollow bodies may be blended in an amount sufficient to make the specific gravity of the liquid pesticide composition 1 or less, and the usual blending amount is from 0.3 parts by weight to 100 parts by weight of the composition. 3
0 parts by weight, preferably 0.5 to 20 parts by weight.

In the agricultural chemical composition for paddy fields of the present invention, a surfactant is added to the paddy field after it is thrown into the paddy field, in order to achieve good dispersion of the agrochemical active ingredient in water. Surfactants that can be used include those commonly used in agricultural chemical formulations. Examples of specific surfactants include polyethylene glycol higher fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene alkyl aryl ethers, polyoxyethylene aryl phenyl ethers, sorbitan monoalkylates, acetylene alcohols and acetylenic diols, and the like. Nonionic surfactants such as alkylene oxide adducts, alkyl aryl sulfonates, dialkyl sulfonates, lignin sulfonates, naphthalene sulfonates and condensates thereof, alkyl sulfates, alkyl phosphates, alkyl aryls Sulfate, alkylaryl phosphate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkylaryl ether sulfate Salts, polyoxyethylene aryl phenyl ether sulfate, an anionic surfactant such as a polycarboxylic acid type polymer active agent or the like, silicone surfactant,
Fluorinated surfactants can be mentioned. These surfactants can be used alone or in combination of two or more.

The mixing ratio of these surfactants is usually 0.1 to 30 parts by weight, preferably 0.5 to 20 parts by weight, more preferably 2 to 100 parts by weight, per 100 parts by weight of the composition. It is 10 parts by weight to 10 parts by weight.

In preparing the paddy field agricultural chemical composition of the present invention, it is necessary to carry the liquid agricultural chemical composition on the grain nucleus. The grain nucleus is a solid base that can carry the liquid pesticide composition. In the present invention, the grain nucleus that can be used to carry the liquid pesticide composition is a water-insoluble solid carrier, for example, mineral substances such as pumice, vermiculite, and pearlite can be used. , Rice straw, wheat straw, palm, banana, bamboo, reeds, kenaf,
Vegetable pieces such as corn wick and wood are particularly preferred because they undergo corrosive degradation over time after treatment.

Each of these grain nuclei has a minor axis of 0.1 mm to 10 m.
m and a bulk specific gravity of 1 or less are preferable. The ratio between the minor axis and the major axis is generally 1 to 20. These grain nuclei are usually 5 parts by weight to 60 parts by weight with respect to 100 parts by weight of the composition.
Parts by weight, preferably 10 to 50 parts by weight.

In the present invention, in addition to the above-mentioned essential components, if necessary, additives commonly used in agricultural chemical formulations such as extenders, component stabilizers, and physical property improvers are blended. Can be used. These auxiliaries may be either solid or liquid, and may be poorly soluble or easily soluble in water. These adjuvants include:
For example, clays, calcium carbonate, bentonite, talc, diatomaceous earth, calcium stearate, fine powder of minerals such as white carbon, ammonium sulfate, ammonium bicarbonate, ammonium nitrate, ammonium chloride, potassium chloride, sodium sulfate, magnesium sulfate, sodium citrate, carbonate Examples thereof include, but are not limited to, organic or inorganic acid salts such as sodium and sodium bicarbonate; organic acids such as citric acid and succinic acid; sugars such as sucrose, lactose and xanthan gum; and water-soluble fine powders such as urea.

The agricultural chemical composition for a paddy field of the present invention is obtained by supporting the liquid agricultural chemical composition on a grain nucleus as described above to form a granular composition,
It is prepared by packaging this in a water-soluble film. As the water-soluble film that can be used in the present invention, a film that dissolves or disperses quickly in water is suitable, and as the material of the film, polyvinyl alcohol, polyoxypolyalkylene glycol, hydroxypropylcellulose, hydroxypropylmethylcellulose, Examples include methylcellulose, sodium carboxymethylcellulose, sodium polyacrylate, alginic acid, gelatin, pullulan, solubilized starch, and the like, provided that they do not dissolve in the liquid pesticidal active ingredient at room temperature in the liquid pesticide composition. There is no particular limitation.

The thickness of the water-soluble film used is not particularly limited, but is generally preferably about 20 μm to 100 μm. Further, multiple packaging may be performed using water-soluble films of the same composition or different compositions.

The agricultural chemical composition for paddy fields of the present invention can be prepared according to a conventional method. For example, a pesticidal active ingredient that is liquid at room temperature, a hollow body, a surfactant and, if necessary, a pesticidal active ingredient that is solid at room temperature and an auxiliary agent are added and mixed to obtain a liquid or suspended liquid. By adding and mixing the grain nuclei, these components are supported on the grain nuclei to form a granular composition. Next, this is filled into a water-soluble film bag,
The paddy agricultural chemical composition of the present invention can be obtained by heat sealing or sealing with an adhesive or the like. in this case,
The essential components constituting the liquid pesticide composition need not always be supported on the grain nuclei at the same time, but may be supported sequentially.
For example, first, a granule nucleus is added to and mixed with a pesticidal active ingredient that is liquid at normal temperature, and then a mixture containing a hollow body and a surfactant is added to and mixed with this mixture, whereby each component is successively carried on the grain nucleus and granulated. After obtaining the composition, the agricultural chemical composition for paddy fields of the present invention can also be obtained by packaging the composition in a water-soluble film bag.

As another method, a pesticidal active ingredient, a hollow body, a surfactant and a solid pesticidal active ingredient which are liquid at ordinary temperature and, if necessary, a solid at ordinary temperature are added and mixed to form a liquid substance or a suspension. To the liquid state, filled in a water-soluble film bag, to form a granular composition by adding a grain nucleus,
The herbicide composition for paddy fields of the present invention can also be obtained by sealing with a heat seal or the like. In this case, the order of filling may be reversed so that the grain nuclei are filled first.

Further, the above-mentioned water-soluble film sheet can be filled in a conventional manner, for example, by folding a water-soluble film sheet, forming a bag-like shape by heat sealing or the like, filling a granular material or the like, and heating the mouth portion by heating. By sealing with a seal or the like, the agricultural chemical composition for paddy fields of the present invention can be obtained. The weight of one paddy agricultural chemical composition of the present invention is 10
g to 200 g.

The composition of the paddy field pesticide composition of the present invention is as described above, and particularly preferred composition is composition 1
20 parts by weight of the pesticidal active ingredient 20 in liquid form at normal temperature
Part to 50 parts, with bubbles, particle size 10 μm to 200 μm
A liquid material having a specific gravity of 0.6 to 0.9, containing 5 to 20 parts of a hollow body as a required component and 5 to 20 parts of a surfactant as essential components,
The minor axis is 0.5 mm to 3 mm, and the ratio of minor axis to major axis is 1 to 20
And 15 parts by weight of a plant grain core having a bulk specific gravity of 0.05 to 0.5
25 g to 50 g of the composition supported on 40 parts per bag.
g was packaged in a polyvinyl alcohol water-soluble film.

The thus-obtained agricultural chemical composition for paddy fields according to the present invention is applied to a paddy field under flooded water from a ridge or a water mouth in an amount of 5 to 10 a.
Used by directly throwing 20 pieces.

[0036]

The feature of the present invention is that a liquid material containing a hollow body is supported on a grain nucleus having a specific size, without using a large amount of an organic solvent or an excessive amount of grain nuclei.
Since it is possible to prepare a formulation floating on the water surface, a small amount of a spray formulation can be obtained.

When the agricultural chemical composition for paddy field of the present invention is thrown into a paddy field, the water-soluble film is dissolved, and the liquid containing the above-mentioned pesticidal active ingredient, hollow body and surfactant which is liquid at ordinary temperature is dissolved. The composition supported on the grain nuclei is dispersed while spreading on the water surface without settling to the bottom of the water, and the pesticide active ingredient is dispersed in the water after desorption from the grain nuclei, so that it can be diffused and sprayed over the entire paddy field. Become.

[0038]

EXAMPLES The present invention will be described in detail below with reference to examples and test examples, but the present invention is not limited to these examples. In addition, in the following Examples, a part represents a weight part.

EXAMPLE 1 A mixture of 51 parts of IBP, 12 parts of diazinon, 2.5 parts of polyoxyethylene nonylphenyl ether and 4 parts of lignin sulfonate was mixed with 9.5 micro balloons (particle diameter: 100 μm to 500 μm). Parts were added and mixed further. The resulting liquid suspension (specific gravity 0.91)
And kenaf pieces (short diameter 0.5 mm to 2 mm, long diameter 2 mm to
21 parts of 10 mm and bulk specific gravity of 0.06) were mixed to obtain a granular material, and 100 g of the granular material was placed in a polyvinyl alcohol water-soluble film bag, heat-sealed and hermetically sealed. An agricultural chemical composition for use was obtained.

Example 2 Benthiocarb 37.5 parts, MCPB ethyl 6 parts, simethrin 11.3 parts, mefenacet 11.3 parts, polyoxyethylene styryl phenyl ether sulfate 1
Parts, 1 part of polyoxyethylene alkylphenyl ether sulfate, 0.2 part of dioctyl sulfosuccinate and 2 parts of acetylene alcohol were mixed to obtain a liquid suspension. This and kenaf pieces (short diameter 0.5mm-2mm,
To a mixture of 24.7 parts of a major diameter of 2 mm to 10 mm and a specific gravity of 0.06), 5 parts of Microsphere MFL-30STI (particle diameter: 20 μm to 80 μm) was added and mixed to obtain a granular material. This is put into a polyvinyl alcohol water-soluble film bag, 20 g per bag, heat-sealed and sealed,
A paddy agricultural chemical composition of the present invention was obtained.

Example 3 30 parts of benthiocarb, bensulfuron-methyl 1.1
Part, mefenacet 6 parts, polyoxyethylene allyl phenyl ether hydrochloride 1.7 parts, dibutyl naphthalene sulfonic acid metal salt 2 parts and acetylene alcohol 2.5 parts were mixed, and the microsphere MFL-30STI (particle size) (20 μm to 80 μm) and further mixed. The resulting suspension liquid (specific gravity: 0.
80) and chaff (minor diameter 1 mm to 3 mm, major diameter 4 mm to 6)
mm, bulk specific gravity 0.11) 46.7 parts were mixed to obtain a granular material, and this was placed in a polyvinyl alcohol water-soluble film bag, 50 g per bag, heat-sealed, and sealed.
A paddy agricultural chemical composition of the present invention was obtained.

Example 4 42.9 parts of benthiocarb, bensulfuron-methyl 1.
A mixture of 5 parts, 8.6 parts of mefenacet, 1.7 parts of polyoxyethylene allyl phenyl ether hydrochloride, 2 parts of metal dibutylnaphthalenesulfonate and 2.5 parts of acetylene alcohol was mixed with Microsphere MFL-30STI. (Particle size 20 μm to 80 μm) 2 parts and E-SPHERES SL-125 (ceramic hollow body;
8 parts (particle size: 100 to 125 μm) were added and mixed. The obtained suspended liquid (specific gravity 0.86) and kenaf pieces (minor diameter 0.5 mm to 2 mm, major diameter 2 mm to 10 mm,
30.8 parts of a bulk specific gravity 0.06) were mixed to obtain a granular material, and 35 g of the granular material was placed in a polyvinyl alcohol-made water-soluble film bag, heat-sealed and hermetically sealed. An agrochemical composition was obtained.

Example 5 42.9 parts of benthiocarb, bensulfuron-methyl 1.
A mixture of 5 parts, 8.6 parts of mefenacet, 1.7 parts of polyoxyethylene allyl phenyl ether hydrochloride, 2 parts of metal dibutylnaphthalenesulfonate and 2.5 parts of acetylene alcohol was mixed with Microsphere MFL-30STI. (Particle size: 20 μm to 80 μm) 2 parts,
8 parts of a ceramic hollow body (particle diameter: 100 μm to 125 μm) was added and further mixed. 30.8 parts of the obtained suspended liquid substance (specific gravity 0.88) and kenaf pieces (minor diameter 0.5 mm to 2 mm, major diameter 2 mm to 10 mm, bulk specific gravity 0.06) are mixed to obtain a granular material. This was put into a polyvinyl alcohol-made water-soluble film bag in an amount of 35 g per bag, heat-sealed and sealed to obtain a paddy agricultural chemical composition of the present invention.

Example 6 21 parts of diisodecyl adipate was added to cyhalofop butyl
Dissolve 3.8 parts, add this to Kafenstroll 5.3
Parts, Daimron 10 parts, Bensulfuron methyl 1.8
Part, polyoxyethylene styryl phenyl ether sulfate 1 part, lignin sulfonate 3 parts, acetylene alcohol 2 parts and methane series hydrocarbon 5 parts, and the mixture was mixed with a ceramic hollow body (particle diameter: 100 μm to 125 μm).
m) 14 parts were added and further mixed. The obtained suspended liquid (specific gravity 0.92) and kenaf pieces (minor diameter 0.5 mm to 2 mm)
mm, major axis 2 mm to 10 mm, bulk specific gravity 0.06) 33.1
The parts were mixed to obtain a granular material, and 35 g of the granular material was placed in a water-soluble film bag made of polyvinyl alcohol, heat-sealed and sealed to obtain a paddy agricultural chemical composition of the present invention.

Example 7 24 parts of pyrochilone, 24 parts of methane series hydrocarbon, 2 parts of polyoxyalkylene allyl phenyl ether sulfate and 3 parts of formalin condensate of butylnaphthalenesulfonic acid
Part, the polyurethane foam (particle size 2)
(00 μm to 400 μm) 15 parts and further mixed. 34 g of the obtained liquid suspension (specific gravity: 0.83) was placed in a water-soluble film bag made of polyvinyl alcohol, and then pearlite (short diameter: 0.3 mm to 1.2 mm, long diameter: 0.8 mm).
16 g of 3 mm to 1.2 mm, bulk specific gravity of 0.2) was added, heat sealed and hermetically sealed to obtain a paddy agricultural chemical composition of the present invention.

Example 8 1.5 parts of bensulfuron-methyl, mefenacet 24
Parts, 2.4 parts of dioctylsulfosuccinate, 0.1 part of polyoxyethylenestyrylphenyl phenol, 3 parts of butylene maleic acid copolymer and 25.5 parts of isodecyl adipate, and the mixture was mixed with a ceramic hollow body (particles). 15 parts (diameter: 100 μm to 125 μm) was added and further mixed. The resulting suspended liquid (specific gravity 0.89),
28.5 parts of wood pieces (short diameter 1 mm to 3 mm, long diameter 4 mm to 8 mm, bulk specific gravity 0.12) were mixed to obtain granules, which were put into a polyvinyl alcohol water-soluble film bag at 35 g per bag. And heat sealing to obtain a paddy agricultural chemical composition of the present invention.

Comparative Example 1 Benthiocarb 42.9 parts, Bensulfuron methyl 1.
5 parts, 8.6 parts of mefenacet, 1.7 parts of polyoxyethylene allyl phenyl ether hydrochloride, 2 parts of metal dibutylnaphthalenesulfonate and 2.5 parts of acetylene alcohol were mixed. The obtained suspended liquid (specific gravity 1.18) and kenaf pieces (minor diameter 0.5 mm to 2 m)
m, major axis 2 mm to 10 mm, bulk specific gravity 0.06) 40.8 parts were mixed to obtain a granular material, and 35 g per bag was placed in a polyvinyl alcohol water-soluble film bag, heat sealed, and sealed. Then, an agricultural chemical composition was obtained.

Comparative Example 2 1.5 parts of bensulfuron-methyl, mefenacet 24
Parts, 2.4 parts of dioctylsulfosuccinate, 0.1 part of polyoxyethylene styrylphenyl phthalate and 3 parts of butylene maleic acid copolymer, were mixed with a ceramic hollow body (particle diameter: 100 μm to 125 μm).
15 parts were added and further mixed. 54 parts of the obtained powder and a piece of wood (short diameter: 1 mm to 3 mm, long diameter: 4 mm to 8 mm, bulk specific gravity: 0.12) were mixed, and 35 g per bag was added to a polyvinyl alcohol water-soluble film bag. Get in,
Heat sealing was carried out to obtain a pesticide composition.

Test Example 1 Dissolution time of water-soluble film: The agricultural chemical composition for a paddy field of the present invention of Examples 1 to 8 was filled with water at 20 ° C. to a depth of 5 cm.
The time from when the composition was thrown into the center of a mx 2 m paddy field, until the water-soluble film was dissolved, and all the packaged compositions fell apart and floated on the water surface was measured. Table 1 shows the results.

[0050]

[Table 1]

As is clear from the results, Examples 1 to
In the paddy agricultural chemical composition of No. 8, the water-soluble film was dissolved in a short time.

Test Example 2 Uniformity of Components, Soil Surface Layer Concentration: A diagram of the paddy agricultural chemical compositions of Examples 4, 5 and 8 and the agricultural chemical compositions of Comparative Examples 1 and 2 at a water depth of 5 cm. The sample was sprayed at the point E of a 10m × 10m paddy field shown in FIG. 24 hours after spraying, water was collected from the points (A to I) shown in FIG. 1 and analyzed. In theory, the concentration in water when the pesticidal active ingredient was uniformly dispersed in water was 100.
%, The standard deviation of the concentration in water at each point was divided by the average value, and the fluctuation rate was calculated.

Further, 24 hours after spraying, the soil at each point was collected with a part of water within a range of 10 cm in radius and 5 cm in depth and analyzed, and theoretically the soil in the case where the pesticide active ingredient was uniformly sprayed was analyzed. The ratio when the component concentration was 100% was determined. The water temperature during the test was 20 ° C to 25 ° C.
A wind with a wind speed of 2 to 5 m was blowing from point to point I. The results are shown in Tables 2 and 3.

[0054]

[Table 2]

[0055]

[Table 3]

As shown in Tables 2 and 3, Example 4
Although the uniformity of the components 5 and 8 in water and the uniformity of the soil surface layer concentration were good, Comparative Examples 1 and 2 were such that a part of the composition packaged in the water-soluble film settled on the bottom of the water. The soil surface concentration at the application point was extremely high, and there was concern about the occurrence of phytotoxicity.

Test Example 3 Implementation of the invention in a paddy field: early May, 20 mx 50 m
The rice (cultivar: Sasanishiki) was transplanted to the paddy field of No. 8 and eight days later, ten paddy field pesticide compositions obtained in Example 5 were thrown from the ridge so as to be almost even. About 1 minute after the treatment, the water-soluble film was dissolved, and the packaged composition was observed to diffuse while floating on the water surface without settling to the bottom of the water. In addition, the wind of the wind speed of 3 to 4 m was blowing on the day of the treatment.
One month after the treatment, weeds such as nobies, urikawa, seri, and pine trees were found in the paddy fields where no pesticide was sprayed. However, weeds were found in the paddy fields where the paddy pesticide composition of the present invention was sprayed. No growth was observed, and no phytotoxicity was observed.

[0058]

EFFECTS OF THE INVENTION The pesticidal composition of the present invention dissolves the water-soluble film quickly, and the packaged composition diffuses into the paddy field in a short time. There is no. In addition, the composition packaged in the water-soluble film has good floating properties and does not settle to the bottom of the water, so that the concentration of the pesticide component at the treatment point does not increase, and the pesticide component diffuses uniformly throughout the paddy field. It has the effect of doing.

[Brief description of the drawings]

FIG. 1 shows a paddy of 10 m × 10 m used in Test Example 2. Point E is a treatment point of the paddy field composition. that's all

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Claims (12)

[Claims] 1. A pesticidal active ingredient which is liquid at room temperature in a grain nucleus,
An agricultural chemical composition for paddy fields, wherein a granular composition having a hollow body and a surfactant carried thereon is packaged in a water-soluble film bag. 2. The paddy field according to claim 1, wherein the liquid pesticidal active ingredient is a pesticidal active ingredient that is itself liquid at room temperature or a solid pesticidal active ingredient that is solid at room temperature dissolved or dispersed in a solvent. Pesticide composition for use. 3. The agricultural chemical composition for paddy fields according to claim 1, wherein the minor axis of the grain nucleus is 0.1 mm to 10 mm and the bulk specific gravity is 1 or less. 4. The agricultural chemical composition for a paddy field according to claim 1, wherein the specific gravity of the liquid composition is 1 or less. 5. The agricultural chemical composition for a paddy field according to claim 1, wherein the hollow body has a particle size of 10 μm to 600 μm. 6. The agricultural chemical composition for a paddy field according to claim 1, wherein the particle size of the hollow body is smaller than the particle size of the grain nucleus. 7. The agricultural chemical composition for a paddy field according to claim 1, wherein the grain nucleus is vegetable. 8. The agricultural chemical composition for a paddy field according to any one of claims 1 to 7, wherein the weight per one piece is 10 g to 200 g. 9. A pesticide granule characterized by directly throwing 5 to 20 paddy agricultural chemical compositions per 10a into a flooded paddy field according to any one of claims 1 to 7. How to spray the agent. 10. A method for producing an agricultural chemical composition for a paddy field, comprising supporting an agricultural chemical active ingredient, a hollow body and a surfactant in a liquid state at normal temperature on a grain nucleus and packaging the same in a water-soluble film bag. 11. A pesticidal active ingredient and a surfactant which are liquid at room temperature are mixed with a grain nucleus, and then a hollow body is added to the mixture, followed by mixing, so that each ingredient is supported on the grain nucleus. A method for producing an agricultural chemical composition for paddy fields, wherein the composition is packaged in a bag. 12. A water-soluble film bag is filled with a mixture containing a pesticidal active ingredient, a hollow body and a surfactant which is liquid at room temperature, and then a grain nucleus is added thereto and packed. A method for producing an agricultural chemical composition for paddy fields, wherein the composition is supported.