JPH05117104A - Application of solid pesticidal preparation for paddy field under being filled with water - Google Patents

Abstract

PURPOSE:To accomplish saving labor for the title preparation's production, transportation and conveyance and also reuse of its containers by applying, through direct dripping on a paddy field filled with water, a dilute solution prepared by incorporating a solid preparation comprising a pesticidal active ingredient and a surfactant with such amount of water as to be capable of suspension. CONSTITUTION:A dilute solution prepared by incorporating (I) a solid preparation comprising (A) a pesticidal active ingredient (e.g. herbicide, insecticide, bactericide) and (B) a surfactant, pref. a mixture of B1: a surfactant selected from among ligninsulfonic acid, (alkyl)naphthalenesulfonic acid- formaldehyde condensates and copolymers of maleic acid and (di)isobutylene or their salts and B2: another surfactant selected from among alkylnaphthalenesulfonic acids, polyoxyethylene alkylphenyl ether sulfates and polyoxyethylene styrylphenyl ether sulfates or their salts with (II) such amount of water as to be capable of suspension is applied through direct dripping at a rate of <= 1000ml/10 ares on a paddy field filled with water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of using a new agricultural chemical in a flooded sewage paddy field.

[0002]

2. Description of the Related Art As formulation forms of pesticides that have been conventionally used in flooded sewage fields, granules and emulsions (emulsions for pre-rice planting and undiluted solution) are mainly used because of the advantage that they can be easily sprayed as they are. Has been done. Granules are generally applied in an amount of 3 to 4 kg per 10 ares, but in recent years, demand for labor-saving spraying of agricultural chemicals has been increasing, and a small amount of spraying agent has been required to reduce the application amount of the preparation. However, when trying to reduce the application amount of granules, the pesticide active ingredient concentration in the granules inevitably increases, and the number of particles per unit area decreases. As a result, it becomes difficult to spread unevenness, and it becomes difficult to uniformly elute and diffuse the active ingredient from the granules into the water of the paddy field, and it is likely that the effect is lowered and the damage to rice is caused.

On the other hand, for example, an oxadiazone emulsion (generic name) is known as an emulsion (emulsion for spraying the undiluted solution before rice transplantation), and this emulsion is directly sprayed on the water surface of a paddy field without being diluted with water. 50 per 10 ares
Used as a small amount spray for 0 ml application. A so-called liquid agent such as this emulsion is considered to be a formulation suitable for application in a smaller amount than granules. However, in the case of an emulsion, there are problems such as chemical damage and ignition due to the contained organic solvent.

From these viewpoints, aqueous suspension preparations or emulsion preparations have been developed in recent years.
(JP-A-60-214701, JP-A-62-87)
501, JP-A-62-289502, JP-A-63-107901 and JP-A-2-2959.
Since the water-based suspension formulation or emulsion formulation described above uses water as a medium, the problems of phytotoxicity, flammability, odor, and toxicity to humans and small animals due to organic solvents like emulsions are mentioned. However, it is easy to cause separation, hard caking, etc. during long-term storage, it is difficult to completely discharge the formulation from the container due to high viscosity to prevent settling of dispersed particles, and applicable agricultural chemical active ingredients Also has a problem in that it has low water solubility and is chemically stable in water. Furthermore, the water added as a medium is necessary only for spraying,
It has the disadvantages of increasing weight during transportation and storage, and liquid leakage due to breakage of the container.

[0005]

Although the conventional aqueous suspension preparation or emulsion preparation has the above-mentioned drawbacks,
The problem to be solved by the present invention is to solve these problems (deficiencies) and further to reduce the weight of the preparation itself.

[0006]

The present invention will be described in detail below. The present invention is to prepare a diluting solution by adding water that can be suspended to a pesticide solid formulation for paddy field containing a pesticide active ingredient and a surfactant, and to prepare a diluting solution, the prepared solution is 1000 m per 10 ares.
It is a method for using a novel solid agricultural chemical formulation for paddy fields, which is characterized in that the pesticidal solid formulation is sprayed directly onto the paddy field in a submerged area at a ratio of 1 or less.

The diluted solution can be prepared, for example, by adding water capable of being suspended at the time of spraying to a container of 1000 ml or less filled with the agricultural chemical solid preparation for paddy field and shaking the mixture. INDUSTRIAL APPLICABILITY The present invention has the following excellent characteristics as compared with the conventionally known method of directly spraying an aqueous suspension preparation or an emulsion preparation onto a paddy field under flooding.

1. The amount of the preparation used is smaller than that of the aqueous suspension preparation or emulsion preparation, and the labor in manufacturing, transportation and transportation is reduced. 2. Since the viscosity of the spray liquid is remarkably reduced as compared with the aqueous suspension preparation and the emulsion preparation, the spray liquid is completely discharged from the container and the container can be reused. 3. It can also be applied to agrochemical active ingredients that cannot be made into aqueous suspension formulations or emulsion formulations because of their high hydrolyzability.

4. For aqueous suspensions and emulsions,
Problems such as separation and hard caking tend to occur during long-term storage, but such problems do not occur in the present invention. The solid preparation of the present invention means a powdery preparation, a granular preparation, a powdery preparation, a granular preparation or a tablet. In order to make the volume of the solid preparation smaller, the granular preparation, the granular preparation, the granular preparation or the tablet is preferable to the powder preparation.

The surfactant used in the present invention is not particularly limited, but when the pesticide solid preparation is a granular preparation, a powdery granular preparation, a granular preparation or a tablet, a minimum stirring is required when water is added. The role of the surfactant is important in that it easily disintegrates and disperses into a uniform suspension. In particular, when the following surfactant (1) and the following surfactant (2) are used together, the disintegration dispersibility is good.

As the surfactant (1), ligninsulfonic acid, naphthalenesulfonic acid formalin condensate, alkylnaphthalenesulfonic acid formalin condensate, maleic acid / diisobutylene copolymer, maleic acid / isobutylene copolymer, Also, one or more surfactants selected from these alkali metal salts, alkaline earth metal salts, ammonium salts or amine salts can be used.

Examples of the surfactant (2) include alkylnaphthalene sulfonic acid, polyoxyethylene alkylphenyl ether sulfate, polyoxyethylene styrylphenyl ether sulfate, and their alkali metal salts, alkaline earth metal salts, and ammonium salts. Alternatively, one or more surfactants selected from amine salts can be used.

The surfactant (1) is added in an amount of 1
It is preferably 5 to 30 parts by weight with respect to 00 parts by weight. The amount of the surfactant (2) added is preferably 1 to 10 parts by weight based on 100 parts by weight of the solid preparation. In the case where the pesticide solid preparation is a granular preparation, a powdery granule preparation, a granular preparation or a tablet, a small amount of water may be added if the addition amount of the surfactants (1) and (2) is outside the above-mentioned addition amount range. It is difficult to disintegrate and disperse easily.

The pesticide solid formulation for paddy field used in the present invention comprises:
Fine mineral powder or water-soluble powder can be used as a filler if necessary. Examples of the fine mineral powder include diatomaceous earth, talc, clay, bentonite, calcium carbonate and the like. Examples of the water-soluble powder include sugars such as lactose, fructose, sucrose, glucose, dextrin and starch, urea and sulfuric acid, phosphoric acid, hydrochloric acid, formic acid, acetic acid,
An alkali metal salt such as propionic acid or an ammonium salt is used. These extenders may be used alone or in combination of two or more.

Further, if necessary, as auxiliary agents, absorptive fine powder, a binder, a grinding aid, a decomposition inhibitor, a coloring agent, a defoaming agent and the like can be added. The method for producing the solid preparation used in the present invention can be produced, for example, by the following method, but is not particularly limited thereto. In the case of a method for producing a powdery preparation, it can be obtained by adding a necessary amount of an agrochemical active ingredient, a surfactant, and if necessary, an extender and other auxiliary agents, mixing them uniformly, and then pulverizing them. The fine pulverization can be performed by a dry pulverizer such as an impact pulverizer, a ball mill, a jet mill.

The granulation method in the case of the granular preparation can be carried out by a granulating machine such as an extrusion type granulating machine, a pressure type granulating machine, a fluidized bed granulating machine, a stirring granulating machine and a tumbling granulating machine. it can. For example, in the case of extrusion-type granulation, an appropriate amount of water is added to the powdery preparation obtained by the above method, and the mixture is kneaded, then granulated using a granulator and dried. Alternatively, as another method of extrusion granulation, a necessary amount of agrochemical active ingredients, surfactants and other auxiliary agents are added to an appropriate amount of water, uniformly mixed to form a slurry, and finely pulverized by a wet pulverizer. The fine pulverization can be performed by a wet pulverizer such as a ball mill and a sand mill. Then, an appropriate amount of a surfactant, a bulking agent, and other auxiliary agents are added to the obtained finely pulverized slurry, and the mixture is kneaded into a paste, which is then granulated using a granulator and dried.

The agrochemical active ingredient that can be used in the present invention is not particularly limited, but examples include those conventionally used as agricultural chemicals for paddy fields. Herbicides include (1) ethyl 5- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -1-methylpyrazole-4-carboxylate (generic name: pyrazosulfuron-ethyl) (2) methyl α- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -O-toluate (generic name: bensulfuronmethyl) (3) 1- (4,6-dimethoxy-1,3,5-triazine- 2-yl) -3- [2- (2-methoxyethoxy) phenylsulfonyl] urea (generic name: cinosulfuron) (4) N- (2-chloroimidazo [1,2-
a] Pyridin-3-ylsulfonyl) -N '-(4,6
-Dimethoxy-2-pyrimidinyl) urea (generic name: imazosulfuron) (5) 4- (2,4-dichlorobenzoyl) -1,3
-Dimethyl-5-pyrazolyl-p-toluenesulfonate (generic name: pyrazolate) (6) 2- [4- (2,4-dichlorobenzoyl)-
1,3-Dimethylpyrazol-5-yloxy] acetophenone (generic name: pyrazoxifene) (7) 2- [4- (2,4-dichloro-m-toluoyl) -1,3-dimethylpyrazol-5-yloxy]
-4-Methylacetophenone (generic name: benzophenap) (8) 1- (α, α-dimethylbenzyl) -3- (paratolyl) urea (generic name: Daimlon) (9) (RS) -2-bromo- N- (α, α-dimethylbenzyl) -3,3-dimethylbutyramide (generic name: bromobutide) (10) α- (2-naphthoxy) propionanilide (generic name: naproanilide), (11) (RS)- 2- (2,4-dichloro-m-tolyloxy) propionanilide (generic name: clomeprop) (12) 2,4,6-trichlorophenyl-4′-nitrophenyl ether (generic name: CNP) (13) 2, 4-dichlorophenyl-3'-methoxy-
4'-Nitrophenyl ether (generic name: clomethoxynil) (14) Methyl 5- (2,4-dichlorophenoxy) -2-nitrobenzoate (generic name: bifenox) (15) 5-tertiarybutyl-3- (2,4-dichloro-5-isopropoxyphenyl) -1,3,4-oxadiazolin-2-one (generic name: oxadiazon), (16) 2-benzothiazol-2-yloxy-N-
Methyl acetanilide (generic name: mefenacet) (17) 2-chloro-2'-6'-diethyl-N- (butoxymethyl) acetanilide (generic name: butachlor) (18) S, S'-dimethyl 2-difluoromethyl- Four
-Isobutyl-6-trifluoromethylpyridine-3,
5-dicarbothioate (generic name: dithiopyr) (19) (Z) -N-but-2-enyloxymethyl-2
-Chloro-2 ', 6'-diethylacetanilide (generic name: butenachlor) (20) 2-chloro-2', 6'-diethyl-N- (2-
(Propoxyethyl) acetanilide (generic name: pretilachlor) (21) 2-3-dihydro-3,3-dimethylbenzofuran-5-ylethanesulfonate (generic name: benfuceate) (22) O-3-tertiary Butylphenyl 6-methoxy-2-pyridyl (methyl) thiocarbamate (generic name: pyributycarb) (23) S- (4-chlorobenzyl) -N, N-diethylthiocarbamate (generic name: benchocave) (24) S-1-methyl-1-phenylethylpiperidine-1-carbothiate (generic name: dimepiperate) (25) S-benzyl 1,2-dimethylpropyl (ethyl) thiocarbamate (generic name: esprocarb) (26) S -Ethylhexahydro-1H-azepine-1
-Carbothioate (generic name: molinate) (27) O-ethyl-O- (3-methyl-6-nitrophenyl) secondary butyl phosphoroamidothioate (generic name: butamiphos) (28) 3,7-dichloro Quinoline-8-carboxylic acid (generic name: quinchlorac) (29) (1RS, 2SR, 4SR) -1,4-epoxy-p-mens-2-yl 2-methylbenzyl ether (generic name: synmethrin) (30 ) 2-Methylthio-4,6-bis (ethylamino)
-S-triazine (generic name: cimetrin) (31) O, O-diisopropyl-2- (benzenesulfonamide) ethyldithiophosphate (generic name: SA
P) (32) 2-methylthio-4-ethylamino-6- (1,
2-Dimethylpropylamino) -s-triazine (generic name: dimetamethrin) (33) 2-methylthio-4,6-bis (isopropylamino) -s-triazine (generic name: promethrin) (34) 2-amino-3 -Chlor-1,4-naphthoquinone (generic name: ACN) (35) 2-Methyl-4-chlorophenoxybutyric acid (generic name: MCPB) (36) 2-Methyl-4-chlorophenoxyacetic acid (generic name: MCP) (37) 2 ′, 3′-Dichloro-4-ethoxymethoxybenzanilide (38) 1- (2-chlorobenzyl) -3- (α, α-dimethylbenzyl) urea (39) N- [2 ′-( 3'-methoxy) -thienylmethyl] -N-chloroaceto-2,6-dimethylanilide and the like.

As the insecticide, (1) O, O-dimethyl-O- [3-methyl-4- (methylthio) phenyl] thiophosphate (generic name: M
PP) (2) O, O-dimethyl-O- (3-methyl-4-nitrophenyl) thiophosphate (generic name: MEP) (3) (2-isopropyl-4-methylpyrimidyl-6)
-Diethylthiophosphate (generic name: diazinon) (4) O, O-diethyl-O- (5-phenyl-3-isoxazolyl) phosphorothioate (generic name: isoxathione) (5) O, O-diethyl -O- (3-oxo-2-phenyl-2H-pyridazin-6-yl) phosphorothioate (generic name: pyridafenthion) (6) O, O-dimethyl-O-3,5,6-trichloro-
2-pyridylphosphorothioate (generic name: chlorpyrifosmethyl) (7) dimethyldicarbetoxyethyldithiophosphate (generic name: marathon) (8) dimethyldithiophosphorylphenylacetate ethyl (generic name: PAP) ( 9) O, O-dimethyl-S- (N-methylcarbamoylmethyl) dithiophosphate (generic name: dimethoate) (10) O, O-dimethyl-S-2- (ethylthio) ethylphosphorodithioate (Generic name: ethyl thiomethone) (11) O, O-dimethyl-S-phthalimidomethyldithiophosphate (generic name: PMP) (12) 2-chloro-1- (2,4,5-trichlorophenyl) Vinyl dimethyl phosphate (generic name: CVMP) (13) 2-chloro-1- (2,4-dichlorophenyl) vinyl dimethyl phosphate (generic name: dimethyl bottle) (14) O, O-dipropyl-O-4-methylthiophenyl phosphate (generic name: propaphos) (15) Dimethyl-2,2,2-trichloro-1-hydroxyethylphosphonate (general) Name: DEP) (16) Ethylparanitrophenylthionobenzenephosphonate (generic name: EPN) (17) 1-Naphthyl-N-methylcarbamate (generic name:
NAC) (18) methatoyl-N-methylcarbamate (generic name: M
TMC) (19) 2-isopropylphenyl-N-methylcarbamide
(Generic name: MIPC) (20) 2-secondary-butylphenyl-N-methylcar
Bamate (generic name: BPMC) (21) 2-isopropoxyphenyl-N-methylcarbamate (generic name: PHC) (22) 3,4-xylyl-N-methylcarbamate (generic name) : MPMC) (23) 3,5-xylyl-N-methylcarbamate (generic name: XMC) (24) 2,2-dimethyl-1,3-benzodioxole-4
-Iylmethyl carbamate (generic name: bendiocarb) (25) 2,3-dihydro-2,2-dimethyl-7-benzo [b] furanyl-N-dibutylaminothio-N-methyl carbamate (General name: carbosulfan) (26) Ethyl-N- [2,3-dihydro-2,2-dimethylbenzofuran-7-yloxycarbonyl (methyl)
Aminothio] -N-isopropyl-β-alaninate (generic name: benflacarb) (27) (RS) -α-cyano-3-phenoxybenzyl =
(RS) -2,2-Dichloro-1- (4-ethoxyphenyl) cyclopropanecarboxylate (generic name: cycloprothrin) (28) 2- (4-ethoxyphenyl) -2-methylpropyl-3 -Phenoxybenzyl ether (generic name: etofenprox) (29) 1,3-bis (carbamoylthio) -2- (N, N
-Dimethylamino) propane hydrochloride (generic name: cartap) (30) 5-Dimethylamino-1,2,3-trithian oxalate (generic name: thiocyclam) (31) S, S'-Z-dimethylamino Trimethylene di (benzenethiosulfonate) (generic name: bensultap) (32) 2-tert-butylimino-3-isopropyl-5-phenyl-3,4,5,6-tetrahydro-2H
-1,3,5-thiadiazin-4-one (generic name: buprofezin) (33) diisopropyl 1,3-dithiolane-2-ylidene-maloneate (generic name: isoprothiolane) (34) 1- (6-chloro) -3-Pyridylmethyl) -N-nitro (imidazolidin-2-ylidene) amine (generic name: imidacloprid) (35) 5-amino-1- (2,6-dichloro-4-trifluoromethylphenyl) -3 -Cyano-4-trifluoromethanesulfinylpyrazole (generic name: fipronil) and the like include (1) O, O-diisopropyl-S-benzylthiophosphate (generic name: IBP) (2) 3-allyloxy-1,2-benzisothiazole-1,1-dioxide (generic name: probenazole) (3) diisopropyl 1,3-dithiolane-2- Isopropylidene - Marone - DOO (common name: isoprothiolane) (4) 1,2,5,6-tetrahydropyrrolo [3,2,1
-Ij] quinolin-4-one (general name: pyroquinone) (5) α, α, α-trifluoro-3′-isopropoxy-O-toluanilide (general name: flutolanil) and the like. The pesticidal active ingredient may be used alone or in combination of two or more depending on the purpose.

[0019]

The present invention will now be described with reference to specific examples, but the present invention is not limited to these examples.
All parts are parts by weight. Example 1 Pyrazosulfuron-ethyl (generic name) that has been finely pulverized with a jet omizer [manufactured by Seishin Enterprise Co., Ltd.]
1.5 parts, 16.2 parts of quinclorac (generic name) finely pulverized with a jet ohmizer in advance, 15 parts of a mixture of a copolymer of maleic acid and diisobutylene and polyoxyethylene styryl phenyl ether sulfate ester salt, alkylnaphthalene sulfone After uniformly mixing 2.5 parts of sodium acid salt, 5 parts of ammonium sulfate, 59.6 parts of clay and 0.2 part of a silicon-based defoaming agent, 30 parts of water was added and kneaded.
Then, granulation is performed using an extrusion type granulator equipped with a screen having a diameter of 0.5 mm. 0.5 mm after drying at 50 ° C
The particles were sized with a 0.85 mm sieve to obtain the granular solid preparation of the present invention.

This granular solid preparation is applied per 10 ares in an amount of 162 g by weight and a volume of about 300 m.
It is l. Example 2 Pyrazosulfuron-ethyl (generic name) finely pulverized with a Jet omizer [manufactured by Seishin Enterprise Co., Ltd.]
1.6 parts, 19.2 parts of oxadiazone (generic name) finely pulverized in advance with a jet atomizer, 6 parts of sodium formalin naphthalenesulfonate formalin, 2 parts of sodium ligninsulfonate, 2 parts of sodium alkylnaphthalenesulfonate, 10 parts of ammonium sulfate, clay 59.2
After uniformly mixing the parts, 25 parts of water is added and kneaded, and then granulated using an extrusion type granulator equipped with a screen having a diameter of 0.5 mm. After drying at 50 ° C, the particles were sized with a sieve of 0.5 mm to 0.85 mm to obtain the granular solid preparation of the present invention.

This granular solid preparation is applied per 10 ares, and the amount of the preparation is 150 g by weight and about 300 ml by volume.
Is. Comparative Example 1 Pyrazosulfuron-ethyl (generic name) finely pulverized with a Jet omizer [manufactured by Seishin Enterprise Co., Ltd.]
0.5 parts, 5.4 parts of quinclorac (generic name) finely pulverized in advance with a jet atomizer, 3 parts of polyoxyethylene styrenated phenol, 10 parts of propylene glycol, 30 parts of 2% xanthan gum, and 51.1 parts of water are mixed to form an aqueous solution. A suspension formulation was obtained.

This aqueous suspension preparation is 50 per 10 ares.
Use 0 ml. Comparative Example 2 Pyrazosulfuron-ethyl (generic name) finely pulverized with a Jet omizer [manufactured by Seishin Enterprise Co., Ltd.]
0.5 parts, 6.0 parts of oxadiazone (generic name) finely pulverized in advance with a jet atomizer, 3.0 parts of sodium alkylnaphthalene sulfonate, 10 parts of propylene glycol, 30 parts of 2% xanthan gum and 50.5 parts of water are mixed to prepare an aqueous suspension preparation. Obtained.

This aqueous suspension formulation contains 50 per 10 ares.
Use 0 ml. The evaluation items and test methods of the preparations obtained in Example 1 and Example 2 and Comparative Examples 1 and 2 will be described below. (1) Weight of formulation applied per 10 ares The weight of formulation application per 10 ares was investigated. The results are shown in Table 1. (2) Water-dilutable dispersibility The granular solid preparations obtained in Examples 1 and 2 were filled in an amount corresponding to (1) in a 500-ml narrow-mouthed plastic bottle. A predetermined amount of tap water was added to the mixture, the lid was closed, and the mixture was tumbled 5 times. Immediately after that, the mixture was passed through a 45 μm sieve, and the amount of the remaining amount passed through the sieve was shown in% by weight. The aqueous suspension preparation obtained in Comparative Example was filled in a 500-ml narrow-necked plastic bottle in an amount of 500 ml, inverted 5 times, and treated in the same manner. The results are shown in Table 1. (3) Ejectability from container The granular solid preparation obtained in the example was charged in an amount corresponding to (1) into a 500 ml narrow-mouthed poly bottle which was weighed in advance. Add a certain amount of tap water and cover it with a lid.
The entire amount was discharged immediately after rotating and knocking down. The amount discharged from the remaining amount remaining in the container is shown in% by weight. The aqueous suspension preparation obtained in Comparative Example was filled in a 500-ml narrow-necked plastic bottle in an amount of 500 ml, inverted 5 times, and treated in the same manner. The results are shown in Table 1. (4) Stability of Active Ingredient 50 ° C. for each of the formulations of Examples and Comparative Examples
Abuse test was carried out for 10 days to examine the residual rate of pyrazosulfuron-ethyl (generic name) as an active ingredient. The residual rate was calculated by the following formula. The results are shown in Table 1. Residual rate (%) = [(amount of active ingredient after test) / (amount of active ingredient before test)] X100 Table 1 ────────────────────── ────────── (1) (2) (3) (4) ──────────────────────────── Example 1 162g 99% 100% 98% Example 2 150g 99% 100% 97% Comparative Example 1 510g 95% 97% 70% Comparative Example 2 510g 96% 98% 72% ───── ──────────────────────── From the results shown in Table 1, the solid preparation of the present invention has a weight of about 10% as compared with the conventional aqueous suspension preparation. It is only 1/3, the dispersibility in water dilution and the dischargeability from the container are good, and the active ingredient is stable with little decomposition due to the abuse test.

Next, the herbicidal effects of the preparations obtained in Examples 1 and 2 and Comparative Examples 1 and 2 are shown below.
However, the water diluted solutions described in Examples 3 and 4 below were used for the herbicidal effect test. Example 3 162 g of the granular preparation obtained in Example 1 was filled in a 500 ml narrow-mouth polyethylene bottle. 338 tap water in it
g and a stopper were added and the mixture was inverted 5 times to obtain a water-diluted solution.

Example 4 150 g of the granular preparation obtained in Example 2 was filled in a 500 ml narrow-mouth polyethylene bottle. 350 tap water in it
g and a stopper were added and the mixture was inverted 5 times to obtain a water-diluted solution. The herbicidal effect test was conducted by the following method. Test Example 1 Herbicidal effect test A 40 cm X 47 cm X 23 cm (height) plastic container was filled with paddy soil, and after scraping, seeds of Novier, firefly, eel and cypress plant were sown, and tubers of Urikawa and Cyperus japonicus were placed. 8 paddy rice seedlings per plastic container
The plant was planted and grown in a greenhouse.

Seven days after the transplantation, 0.1 ml each of the water-diluted solutions described in Examples 3 and 4 and the aqueous suspension preparations of Comparative Examples 1 and 2 were applied to the water surface using a micropipette.
This application rate corresponds to 500 ml per 10 ares. On the 28th day after the treatment, the effect on each weed and paddy rice was evaluated according to the following criteria. Criteria 5: Complete death or suppression of 90% or more 4: Suppression of 70-90% 3: 40-70% suppression 2: 20-40% suppression 1: 5-20% suppression 0: 5% or less Suppression The degree of suppression was determined by visual observation. The results are shown in Table 2.

[0027]

As is apparent from the examples and comparative examples, the method of using the solid pesticide solid formulation for paddy field of the present invention is the method of directly spraying a conventionally known aqueous suspension formulation to a flooded paddy field. The following effects are obtained by comparison. 1. By reducing the amount of the formulation used to about 1/3 or less of the weight of the aqueous suspension formulation, the labor in production, transportation and transportation is reduced.

2. Since the viscosity of the spray liquid is remarkably reduced as compared with the aqueous suspension preparation, the spray liquid is completely discharged from the container, and the container can be reused. 3. It can also be applied to agrochemical active ingredients that cannot be made into an aqueous suspension formulation due to their high hydrolyzability. 4. The biological effect equivalent to that of the aqueous suspension preparation is obtained, and there is no phytotoxicity to paddy rice.

Front Page Continuation (72) Inventor Koichi Suzuki 1470 Shiraoka, Shiraoka-cho, Minamisaitama-gun, Saitama Nissan Chemical Industry Co., Ltd.

Claims (6)

[Claims] 1. A diluting solution is prepared by adding water that can be suspended to a pesticide solid formulation for paddy field containing a pesticide active ingredient and a surfactant, and the diluting solution is mixed at a rate of 1000 ml or less per 10 ares. A method for using a pesticide solid formulation for paddy field, which comprises spraying directly onto a paddy field under flooded condition. 2. The paddy agricultural chemical solid preparation according to claim 1, wherein the diluting liquid is prepared by adding water capable of suspension to a container of 1000 ml or less filled with the paddy agricultural chemical solid preparation and shaking the mixture. How to use. 3. The method for using the agricultural chemical solid preparation for paddy field according to claim 1, wherein the solid preparation is a powdered preparation, a granular preparation, a powdery granular preparation, a granular preparation or a tablet. 4. The method for using the solid agricultural chemical preparation for paddy field according to claim 1, wherein the agricultural chemical active ingredient is a herbicidal active ingredient. 5. The surfactant is a combination of the following surfactant (1) and the following surfactant (2).
A method for using the agricultural chemical solid preparation for paddy field described. (1) Lignin sulfonic acid, naphthalene sulfonic acid formalin condensate, alkylnaphthalene sulfonic acid formalin condensate, maleic acid / diisobutylene copolymer, maleic acid / isobutylene copolymer, or an alkali metal salt or alkaline earth thereof. One or more surfactants selected from the group consisting of metal salts, ammonium salts and amine salts. (2) Alkylnaphthalenesulfonic acid, polyoxyethylene alkylphenyl ether sulfate, polyoxyethylene styryl phenyl ether sulfate,
Or these alkali metal salts, alkaline earth metal salts,
One or more surfactants selected from ammonium salts or amine salts. 6. The surfactant is a combination of the following surfactant (1) and the following surfactant (2).
A pesticide solid formulation for paddy field used in the method for using the pesticide solid formulation for paddy field according to the description. (1) Lignin sulfonic acid, naphthalene sulfonic acid formalin condensate, alkylnaphthalene sulfonic acid formalin condensate, maleic acid / diisobutylene copolymer, maleic acid / isobutylene copolymer, or an alkali metal salt or alkaline earth thereof. One or more surfactants selected from the group consisting of metal salts, ammonium salts and amine salts. (2) Alkylnaphthalenesulfonic acid, polyoxyethylene alkylphenyl ether sulfate, polyoxyethylene styryl phenyl ether sulfate,
Or these alkali metal salts, alkaline earth metal salts,
One or more surfactants selected from ammonium salts or amine salts.