JP2002003301A - Foaming pesticide formulation for water application - Google Patents

Abstract

(57) [Abstract] It is an object of the present invention to provide a pesticide formulation which rapidly spreads in water when sprayed on a paddy field. A pesticide active ingredient, carbonate, water-soluble solid acid and diisobutyl adipate, dioleyl adipate, diethylhexyl phthalate, 2-ethylhexyl trimellitate, methyl myristate, methyl oleate or methyl naphthalene 1 A water-applied effervescent pesticide formulation, characterized in that various high-boiling solvents are packaged in a water-soluble polymer film. SOLUTION: The water-applied effervescent pesticide formulation of the present invention is packaged with a water-soluble polymer film in a size that is easy to throw by hand.
It is labor-saving only to throw in about 20 pieces by hand, and it generates carbon dioxide gas in the paddy field, and the pesticidal active ingredient is quickly diffused into water, so that a sufficient control effect is exhibited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an effervescent pesticide formulation applied to paddy fields.

[0002]

2. Description of the Related Art Hitherto, studies on effervescent pesticide preparations have been concerned with herbicidal granules and tablets comprising a solid acid, an alkali metal or alkaline earth metal carbonate, a mineral carrier and a surfactant. No. 47-27930). Recently, as one of the labor-saving measures for spraying pesticides, paddy rice paddies have been hand-manufactured by putting herbicidal granules in water-soluble polymer film bags or by adding foaming agents and molding them into large tablets. A method of throwing into water has been proposed.

[0003]

The above-mentioned conventional effervescent pesticide formulation, when applied to a paddy field, has an insufficient effect of diffusing the active ingredient of the pesticide in water. However, it has drawbacks such as damaging rice, and has not been put to practical use. In addition, the recently proposed method of throwing large granules or tablets into paddy fields by hand has not been able to spread uniformly and quickly like the conventional foaming agents. Therefore, development of a new effervescent pesticide to replace this is desired. Accordingly, the present invention provides a novel water-applied effervescent pesticide formulation having uniform and sufficient diffusivity.

[0004]

Means for Solving the Problems The present inventors have intensively studied to solve these problems. As a result, one selected from the pesticidal active ingredient, carbonate, water-soluble solid acid and diisobutyl adipate, dioleyl adipate, diethylhexyl phthalate, 2-ethylhexyl trimellitate, methyl myristate, methyl oleate or methyl naphthalene The above-mentioned problem was solved and the labor-saving and highly safe effervescent pesticide formulation was completed by packaging the solid composition containing the high boiling point solvent with a water-soluble polymer film.

Next, the effervescent pesticide preparation of the present invention will be described in detail.

[0006] The carbonate used in the present invention is not particularly limited, and examples thereof include sodium carbonate, sodium hydrogen carbonate, ammonium carbonate, potassium carbonate, calcium carbonate, sodium sesquicarbonate and the like. These carbonates may be used alone or in combination of two or more.

The water-soluble solid acid used in the present invention is not particularly restricted but includes, for example, citric acid, succinic acid, fumaric acid,
Maleic acid, tartaric acid, oxalic acid, malic acid, adipic acid, sodium dihydrogen phosphate, boric acid, potassium dihydrogen phosphate and the like can be mentioned. These water-soluble solid acids may be used alone or in combination of two or more.

The amounts of the carbonate and the water-soluble solid acid can be arbitrarily added. The total weight of the carbonate and the water-soluble solid acid is 10 to 90% of the total weight, and the carbonate and the water-soluble solid acid are added. Is preferably 1:10 to 10: 1.

The high-boiling solvents that can be used in the present invention include the following.

Diisobutyl adipate, dioleyl adipate, diethylhexyl phthalate, trimellitic acid 2
Aromatic hydrocarbons such as -ethylhexyl, methyl myristate, methyl oleate or methylnaphthalene can be used.

The pesticidal active ingredient of the present invention can be used as long as it is commonly used in paddy fields. For example, the following are mentioned.

(Insecticides) MPP, MEP, pirimiphosmethyl, diazinon, isoxathion, pyridafenthion, chlorpyrifosmethyl, bamidione, marathon, PAP, dimethoate, ethyl thiomethone, PM
P, monocrotophos, BRP, CVMP, dimethylvinphos, propaphos, DEP, EPN, NAC, MTM
C, MIPC, BPMC, PHC, MPMC, XMC,
Bendiocarb, carbosulfan, benfracarb, thiodicarb, cycloprothrin, etofenprox, cartap, thiocyclam, bensultap,
Buprofezin, etc.

(Bactericide) Basic copper sulfate, basic copper chloride,
Cupric hydroxide, organosulfur 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, MAFE, benthiazole,
Phenazine oxide, diclomedine, probenazole,
Isoprothiolane, tricyclazole, pyroxine, oxonic acid, guazatine and the like.

(Herbicide) 2,4-D, MCP, MCPB,
Phenothiol, Clomeprop, Naproanilide, C
NP, Clomethoxynil, Bifenox, MCC, Benthiocarb, Esprocarb, Molinate, Dimepiperate, DCPA, Butachlor, Pretilachlor,
Bromobutide, mefenacet, dimuron, bensulfuron-methyl, simethrin, promethrin, dimethamethrin, bendazone, oxadiazon, pyrazolate, pyrazoxifene, benzofenap, trifluralin,
Piperophos, ACN, and the like.

(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 0.1 to 50% (% 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.

The names of these pesticidal active ingredients are the common names described in the "Agrochemical Handbook" (1989 edition, published by the Japan Plant Protection Association).

The water-applied effervescent pesticide preparation of the present invention may contain, in addition to the above-mentioned composition, auxiliaries such as a surfactant, a stabilizer for the pesticide active ingredient, and a physical property improver. Some carriers may be used in combination.

Such surfactants include nonionic surfactants, anionic surfactants, cationic surfactants, and mixtures of nonionic and anionic surfactants commonly used in agricultural chemical formulations. Surfactants and the like can be used.

The carrier includes clay, silica, talc, bentonite, calcium carbonate, pumice, diatomaceous earth, vermiculite, perlite, white carbon, urea, ammonium sulfate, ammonium chloride, potassium chloride, sodium sulfate, sodium carbonate, sucrose. , Glucose, maltose, lactose, dextrin, starch, polyvinyl alcohol, cellulose, carboxymethyl cellulose, polyethylene glycol,
Sodium polyacrylate, gum arabic, xanthan gum and the like can be used.

The water-applied effervescent pesticide preparation of the present invention may be a solid formulation such as a granule or tablet comprising a pesticidal active ingredient, a carbonate, a water-soluble solid acid and a high boiling solvent,
Alternatively, it is wrapped in a water-soluble polymer film, but in the latter case, it is put into a paddy field. In consideration of ease of putting and labor saving, one piece of water-soluble polymer film is used. It is desirable that the wrapped product weighs 10 to 100 g. Here, the shape of the packaging is not particularly limited, and may be, for example, any of a sphere, a column, a square, a box, and an irregular shape.

As the water-soluble polymer film used in the present invention, any one can be used as long as the effervescent pesticide formulation of the present invention is rapidly dissolved when put into water of a paddy field. Examples include polyvinyl alcohol, carboxymethylcellulose, dextrin, hydroxyethylcellulose, methylcellulose, alginate, gelatin, pectin, pullulan, polyvinylpyrrolidone, polyacrylate, polyethylene oxide, and the like. The thickness of these films may be 30 μm to 2 mm as long as they do not easily break during storage, transportation, or throwing into a paddy field by hand.

The water-applied effervescent pesticide formulation of the present invention thus obtained, when not packaged with a water-soluble polymer film,
What is necessary is just to spray the granules, tablets and the like uniformly in the paddy field simultaneously with the conventional granules and tablets. In addition, when it is packaged with a water-soluble polymer film, it depends on the type of the pesticidal active ingredient, the content in the preparation, etc., but per 10 ares, for example,
5 to 2 if it is packaged in a weight of 50 to 100 g
You only have to throw about 0 pieces into the rice field. Then, carbon dioxide gas is released into the water and foamed, whereby the pesticidal active ingredient is widely diffused in the water, and a sufficient control effect can be obtained.

[0024]

In the present invention, the carbonate and the water-soluble solid acid release carbon dioxide gas due to the large amount of water in the paddy field to foam and have a function of widely dispersing the pesticidal active ingredient into the paddy field together with the high boiling point solvent. .

[0025]

EXAMPLES The method for preparing the water-applied effervescent pesticide preparation of the present invention is not particularly limited, but can be prepared, for example, by the following method. The pesticidal active ingredient, carbonate, water-soluble solid acid and high boiling point solvent are mixed with a hammer mill to obtain a powdered solid composition. The pesticidal active ingredient, carbonate, water-soluble solid acid and high boiling point solvent are granulated by a dry granulator to obtain a solid composition. A pesticidal active ingredient, a carbonate, a water-soluble solid acid and a high boiling solvent are molded by a tablet molding machine to obtain a solid composition. The above preparation may be used as it is, but it is molded into a certain size and packaged with a water-soluble polymer film.

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

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

Example 1 2.1 parts of phenothiol drug substance, simethrin drug substance 4.5
Parts, 30 parts of citric acid, 30 parts of sodium hydrogencarbonate, 5 parts of diisobutyl adipate, 3 parts of white carbon and 25.4 parts of clay are mixed with a hammer mill to obtain a powdery solid composition. This was packaged with a polyvinyl alcohol film (thickness: 40 μm) to 50 g per piece.

Example 2 2.1 parts of phenothiol drug substance, simethrin drug substance 4.5
Parts, 25 parts of potassium dihydrogen phosphate, 10 parts of sodium hydrogen carbonate, 5 parts of polyvinyl alcohol, 2 parts of methylnaphthalene, and 51.4 parts of potassium chloride after mixing with a hammer mill, and dry granulating with a briquetting machine. After sizing, a solid composition of 500 to 1680 μm is obtained. This was packaged with a pullulan film (thickness: 50 μm) to 50 g per piece.

Example 3 2.1 parts of phenothiol drug substance, simethrin drug substance
5 parts, maleic acid 20 parts, sodium carbonate 20 parts,
Cellulose powder 5 parts, methyl myristate 5
Parts, 5 parts of diatomaceous earth and 38.4 parts of lactose were mixed by a hammer mill, and then mixed with a tableting machine at 20 kg / cm.
Apply a pressure of ² to obtain 50 g tablets each. This was packaged with a polyvinyl alcohol film (thickness: 40 μm).

Next, the usefulness of the effervescent pesticide formulation for water application according to the present invention is shown by test examples.

Test Example 1 Herbicidal effect and phytotoxicity test A test plot having an area of 100 m ² (10 mx 10 m) was made, and per plot, the seeds of the rice flour (50 g), the firefly seeds (30 g), the azena seed (10 g), The seeds of the onion (10 g) were sowed and plowed, and then a 2-leaf stage rice seedling (variety: Nipponbare) was mechanically transplanted. When these weeds reached the 2-3 leaf stage, five (50 g) samples prepared according to Examples 1 to 3 were placed in the center (one place) of the test plot.
Processed.

The commercial granules used as comparative examples were sprayed on the entire surface of the paddy field.

The survey was conducted 30 days after the drug treatment, and
5m from the center and the four corners ²Miscellaneous that survived inside
Grass is extracted, its dry weight (g) is measured, and
The average weeding rate (%) of the five plots was calculated. Against rice
With regard to phytotoxicity, holistic investigation of the extent of phytotoxicity according to the following criteria
Was. The results are shown in Tables 1 and 2.

[0035]

(Equation 1)

[0036]

[Table 1]

[0037]

[Table 2]

[0038]

According to the present invention, the following effects can be obtained. First, when the water-applied effervescent pesticide formulation of the present invention is applied to a paddy field, the pesticidal active ingredient can be rapidly and uniformly diffused into paddy water. this is,
It does not change when the agricultural chemical formulation of the present invention is used as it is or when it is introduced into a paddy field with a water-soluble polymer film. Secondly, the pesticide preparation of the present invention, which is packaged with a water-soluble polymer film, requires only about 5 to 20 pieces per 10 ares to be thrown into a paddy field by hand. Unnecessary and economical. Third, the pesticide formulation of the present invention cast into a paddy field diffuses the pesticidal active ingredient into the paddy water as described above, and forms a uniform treatment layer. , Phytotoxicity is also reduced.

Continuation of the front page F term (reference) 4H011 AA01 AB01 AB02 AB03 AC01 AC04 BA01 BB06 BB09 BC06 BC18 BC20 DA02 DA03 DD02 DH24

Claims (2)

[Claims] 1. An agricultural chemical active ingredient, selected from carbonates, water-soluble solid acids and diisobutyl adipate, dioleyl adipate, diethylhexyl phthalate, 2-ethylhexyl trimellitate, methyl myristate, methyl oleate or methyl naphthalene. A water-applied effervescent pesticide formulation comprising a solid composition containing one type of high-boiling solvent. 2. An agricultural chemical active ingredient, selected from carbonates, water-soluble solid acids and diisobutyl adipate, dioleyl adipate, diethylhexyl phthalate, 2-ethylhexyl trimellitate, methyl myristate, methyl oleate or methyl naphthalene. A effervescent pesticide formulation for surface application, comprising a solid composition containing one type of high-boiling point solvent, which is packaged with a water-soluble polymer film.