JP3166994B2 - Pesticide formulation for water application - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to a water-applied agricultural chemical formulation.

[0002]

2. Description of the Related Art Conventionally, studies have been made on pesticide formulations suspended on the water surface of paddy fields in order to enhance the effects of pesticide active ingredients. For example, a fired pearlite made of polybutene to which an insecticidal component is fixed (Japanese Patent Publication No. 47-1240)
JP-B-48), a carrier in which pumice grains and pearlite grains float on the surface of water, and a paste-like substance to which a bactericidal component is attached (Japanese Patent Publication No. 48-78).
No. 1179), foamed pearlite or obsidian with hardened oil and paraffin petroleum resin to which an insecticidal component is attached (Japanese Patent Publication No. 48-1181), and an inorganic carrier floating on water such as perlite carries the herbicidal component. What was made
No. 1182), cellulose ether, a polycarboxylic acid type polymer activator and a main agent held on a granular carrier such as pearlite (JP-B-48-15612), ethylene-vinyl acetate copolymer, polypropylene and insecticidal component And molded into granules (JP-B-49-24)
No. 222), a pesticidal component mixed with a water-repellent substance and adhered to the surface of a granular base (Japanese Patent Application Laid-Open No. 47-39638). Fine granules of a synthetic resin foam impregnated with a pesticide component are used. Sealed with a water-soluble polymer film (JP-A-5
No. 3-99327), a pesticide component dissolved or dispersed in a wax-like substance, and a water-soluble or water-dispersible substance is formed into granules by an extrusion granulator (JP-A-56-309)
No. 01), a porous or hollow body having a pesticide active ingredient adhered thereto with a synthetic resin or gypsum (Japanese Patent Publication No. 2-5).
No. 6323), water-soluble carriers, inorganic or organic film-forming substances and pesticidally active ingredients granulated (JP-B-63-30281).

[0003] Recently, as one of the labor-saving methods of spraying pesticides, a herbicidal granule is put into a bag of a water-soluble polymer, or a foaming agent is put into a large tablet and molded. A method of throwing into rice paddy water by hand has been proposed.

[0004]

The conventional technique for imparting floatability described above does not sufficiently spread the pesticide active ingredient into water even if it floats on the surface of the water, so that sufficient effects cannot be obtained. High, not economical, because the carrier used for the floating formulation is a synthetic product, it remains for a long time without being decomposed, in order to evenly spray rice paddies, a sprayer may be required, For these reasons, it is not always a satisfactory technology. In addition, the recently proposed method of manually throwing large granules or tablets into paddy fields is insufficient for uniformly and promptly dispersing the pesticidal active ingredient into paddy water. Therefore, development of a formulation free from such disadvantages is desired.

[0005]

Means for Solving the Problems The present inventors have intensively studied to solve these problems. As a result, a pesticide active ingredient, a glassy hollow body having an average particle diameter of 100 μm or less, a surfactant in which lauryl sulfate and an anionic surfactant other than lauryl sulfate are used as a surfactant, and an inorganic solid carrier or an organic solid Carrier, having an average particle size of 1
The present inventors have found that the above-mentioned problems can be solved by packaging 10 g to 100 g of the powdery composition having a size of 00 μm or less with a water-soluble polymer film, and completed the present invention.

Next, the pesticide formulation for water application according to the present invention will be specifically described.

As the pesticidal active ingredient of the present invention, any of those usually used in paddy fields can be used, and one kind or two or more kinds may be used in combination. Examples of such pesticidal active ingredients include the following.

(Insecticides) MPP, MEP, pirimiphosmethyl, diazinon, isoxathion, pyridafenthion, chlorpyrifosmethyl, bamidione, marathon, PAP, dimethoate, ethylthiomethone, monocrotophos, BRP, CVMP, dimethylvinphos, propaphos, DEP, EPN, NAC , MTMC, MIP
C, BPMC, PHC, MPMC, XMC, bendiocarb, carbosulfan, benfracarb, thiodicarb, cycloprothrin, etofenprox, cartap, thiocyclam, bensultap, buprofezin, and the like.

(Disinfectant) Basic copper sulfate, basic copper chloride,
Cupric hydroxide, organic sulfur nickel salt, thiuram, captan, TPN, fusalide, IBP, EDDP, thiophanate methyl, benomyl, iprodione, mepronil, flutranil, tefurophthalam, pencyclon, metalaxyl, triflumizole, blasticidin S,
Kasugamycin, polyoxin, validamycin A, oxytetracycline, hydroxyisoxazole, metasulfocarb, MAF, MAFA, benthiazole,
Diclomedin, probenazole, isoprothiolane, tricyclazole, pyroquilon, oxonic acid, guazatine, ferimzone, etc.

(Herbicide) 2,4-D, MCP, MCP
B, Phenothiol, Clomeprop, Naproanilide, CNP, Clomethoxynil, Bifenox, MC
C, Benthiocarb, Esprocarb, Molinate, Dimepiperate, DCPA, Butachlor, Pretilachlor, Bromobutide, Mefenacet, Dimelone, Bensulfuron-methyl, Simethrin, Promethrin, Dimethamethrin, Bentazone, Oxadiazon, Pyrazolate, Pyrazoxifene, Benzofenap, Triflularin, Apilofoline Such.

(Plant regulators) Inabenfide, oxyethylene docosanol, nicotinamide, benzylaminopurine, and the like.

The amount of these pesticidally active ingredients to be added to the preparation is not particularly limited, but is generally 0.01 to 90% (% by weight) of the total amount of the preparation. Depending on the type, it may be added so that the required spray amount per 10 ares is obtained.

These pesticidal active ingredient names are common names described in "Agrochemical Handbook" (1992 edition, published by the Japan Plant Protection Association).

The glassy hollow body used in the present invention is not particularly limited as long as it has an average particle diameter of 100 μm or less, and includes the following. For example, perlite obtained by heating and foaming natural glassy rocks such as obsidian, perlite and pine stone, and shirasu balloon (trade name) obtained by processing shirasu in the same manner. The vitreous hollow body includes a body having one bubble and a body having two or more independent bubbles, and both can be used, but the latter is more preferable in terms of pressure resistance required in a manufacturing situation. When the average particle diameter of the vitreous hollow body is larger than 100 μm, the diffusivity on the water surface is deteriorated, and it is essential that the average particle diameter be 100 μm or less.

[0015] Such a vitreous hollow body is one kind or two kinds.
More than one species can be used in combination, and 1 to 80
It is desirable to add 5 parts by weight, preferably 5 to 50 parts by weight.

The lauryl sulfate used as a surfactant in the present invention includes sodium lauryl sulfate, ammonium lauryl sulfate, triethanolamine lauryl sulfate and the like.

The anionic surfactant excluding lauryl sulfate is not particularly limited. Examples thereof include sodium oleate, potassium oleate, sodium dodecylbenzenesulfonate, sodium alkylnaphthalenesulfonate, sodium dialkylsulfosuccinate, and alkylphosphonate. Acid salt, naphthalenesulfonic acid formalin condensate,
Sodium polyoxyethylene alkyl ether sulfate,
Sodium polyoxyethylene alkylphenol ether sulfate, triethanolamine polyoxyethylene alkyl ether sulfate, sodium lignin sulfonate,
Calcium lignin sulfonate.

However, the ratio of lauryl sulfate to anionic surfactant excluding lauryl sulfate is 1: 0.2 to 10
It is preferable that the content of lauryl sulfate in the preparation is 0.1 to 10 parts by weight.

In using anionic surfactants other than lauryl sulfate, there is no problem even if one or more of these are used in combination.

There is no problem if a nonionic surfactant is used if necessary, and the type of the nonionic surfactant is not limited at all.

The inorganic solid carrier or organic solid carrier used in the present invention is not particularly limited. Examples thereof include clay, bentonite, talc, calcium carbonate, sodium carbonate, ziglite, sericite, acid clay, quartzite, diatomaceous earth, pumice stone, and the like. Inorganic solid carriers such as perlite, zeolite, vermiculite, potassium chloride, urea, white carbon, ammonium sulfate, sodium sulfate, magnesium sulfate, and glucose, maltose, sucrose, lactose, dextrin, starch, cellulose, carboxymethylcellulose, polyvinyl alcohol, polypropylene oxide And organic solid carriers such as polyethylene oxide, sodium polyacrylate, polyethylene glycol, gum arabic and xanthan gum.

One or more of these inorganic solid carriers or organic solid carriers can be used in combination. Of course, an inorganic solid carrier and an organic solid carrier may be used in combination.

The pesticide formulation for water application according to the present invention may contain an auxiliary agent such as a stabilizer for the active ingredient of the pesticide, a solvent or a physical property improver.

In order to dissolve the pesticidal active ingredient and to improve the physical properties of the preparation, the preparation of the present invention contains, as a solvent,
Polybasic acid alcohol esters such as diisobutyl adipate, dioleyl adipate, diisodecyl adipate, diethylhexyl phthalate, didecyl phthalate, 2-ethylhexyl trimellitate and triisodecyl trimetate; cetyl 2-ethylhexanoate; cetyl coconut fatty acid; Fatty acid alcohol esters such as methyl laurate, methyl myristate, methyl oleate and octyl oleate; polyhydric alcohol fatty acid esters such as sorbitan monolaurate and sorbitan monooleate; octyl alcohol; higher alcohols such as lauryl alcohol; 2-dimethyl-4-ethylbenzene, methylnaphthalene, 1-phenyl-1-xylylethane,
Aromatic hydrocarbons such as 1-xylyl-1,3-diphenylbutane may be used.

The preparation of the pesticide preparation for water application according to the present invention is not particularly limited, but may be carried out by the following method. For example, a pesticide active ingredient is added to a glassy hollow body, a surfactant, an inorganic solid carrier or an organic solid carrier, and if necessary, a stabilizer for a pesticide active ingredient, a solvent, and other physical property improvers. And mixed with a sieve having an opening of 100 μm to obtain a powdery composition having an average particle diameter of 100 μm or less.

Further, 10 g to 10 g of the powdery composition
0 g is packaged with a water-soluble polymer film to obtain the water-applied agrochemical formulation of the present invention.

In order to spray the water-applied agrochemical preparation of the present invention, it is sufficient to throw the pesticide onto the water surface of the paddy field by hand without entering the paddy field. In addition, the weight of one pesticide formulation of the present invention is not preferable if the amount is less than 10 g because the number of pieces per unit area increases, and if it exceeds 100 g, the packaging bag is buried in the paddy soil due to its own weight at the time of throwing, and the Becomes less diffusible on the water surface. Therefore, it is convenient to formulate the composition so that the weight of each composition is 10 to 100 g, preferably 30 to 60 g.

The water-soluble film used in the present invention is not particularly limited, as long as the agricultural chemical formulation of the present invention is immediately dissolved in a large amount of water after being thrown into the water surface of a paddy field. For example, polyvinyl alcohol, carboxymethyl cellulose, pullulan and the like can be mentioned.

[0029]

The glassy hollow body having an average particle diameter of 100 μm or less and lauryl sulfate used in the present invention have a function of floating the powdery composition, and the anionic surfactant except lauryl sulfate is used on the water surface. The powdery composition is disintegrated, and the pesticidal active ingredient supported on the inorganic solid carrier or the organic solid carrier is widely diffused in water.

[0030]

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

In the following, "parts" all indicate parts by weight.

Example 1 Probenazole 20 parts, Shirasu balloon (average particle size 60 μm, manufactured by Id Kasei Co., Ltd., trade name “Winlite”) 60 parts, sodium lauryl sulfate 4 parts, sodium ligulin sulfonate 5 parts, 11 parts of zeolite were mixed with a hammer mill (trade name “Sample Mill K-2-1”, manufactured by Fuji Paudal Co., Ltd.), and the average particle size was 1
A powdery composition of not more than 00 μm is obtained. Next, 50 g of the powdery composition thus obtained is packaged with a polyvinyl alcohol film (thickness: 40 μm) to obtain the water-applied agricultural chemical formulation of the present invention.

Next, the usefulness of the water-applied agrochemical preparation of the present invention is shown by test examples.

[0034]

[Test example]

Test Example Diffusion test A test section (impregnation depth: 3 cm) having an area of one section of 100 m ² (10 m × 10 m) was made, and one sample (50 g) prepared according to Example 1 was placed at the center (one place). Processed. 1.5 hours after treatment, the center (section A) and four corners (B)
Water from each of five locations with a water depth of 1.5 cm in each area
1 was collected and the concentration of the pesticidal active ingredient in the water was analyzed by the HPLC method.

The commercial granules used as the comparative agent were sprayed on the entire surface of the paddy field. The results are shown in Tables 1 to 4.

[0036]

[Table 1]

[0037]

[Table 2]

[0038]

[Table 3]

[0039]

[Table 4]

[0040]

According to the present invention, the following effects can be obtained. First, the water-applied pesticide formulation of the present invention requires only about 5 to 20 tablets per 10 ares in a paddy field, which is labor-saving, does not require a sprayer, and is economical. Secondly, the pesticide formulation of the present invention put into a paddy field rapidly diffuses the pesticide active ingredient in water and forms a uniform treatment layer, thus exhibiting a higher effect than in the case of using conventional granules. In addition, phytotoxicity is reduced.

Continuation of the front page (56) References JP-A-5-78204 (JP, A) JP-A-5-155709 (JP, A) JP-A-5-139906 (JP, A) JP-A-5-246802 (JP) , A) JP-A-5-58804 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01N 25/00

Claims (1)

(57) [Claims] 1. An agricultural chemical active ingredient, a glassy hollow body having an average particle diameter of 100 μm or less, an anionic surfactant other than lauryl sulfate and lauryl sulfate as a surfactant, and an inorganic solid carrier or an organic solid carrier, 10 g to 100 of the powdery composition having a particle diameter of 100 μm or less
A water-applied pesticide formulation, wherein g is packaged with a water-soluble polymer film.