KR20070098546A - Improving Solid Preparations of Pesticides - Google Patents

Abstract

A solid preparation containing an active ingredient of the pesticide, wherein the solid preparation is columnar granules, and the number of columnar granules having a particle length of 3.5 mm or more is 6 or less per 1 g of the solid preparations. It relates to solid preparations.

Description

An improved solid formulation of agrochemicals for paddy field

The present invention relates to an improved solid preparation of agrochemical pesticides. More specifically, the present invention relates to an improved solid preparation of agrochemicals for water-repellent pesticides, which can be stably discharged without being clogged when spraying by a simultaneous spraying machine.

In recent years, in crop cultivation, labor-saving control of pests and weeds is further demanded.

For example, in the weed control in water works, water-based disposable control agents that can control weeds by one spraying have been developed, and pesticides using a seeding simultaneous sprayer (planting simultaneous processor) in the labor-saving application method. Spraying methods for solid preparations have been developed (for example, "Trade name: Innovator Makube" and Maruyama Plant).

In the spraying of medicine by the co-planter, for example, the pesticide solid preparation is stored in the hopper portion of the co-planter, and then passes through a mesh near the exit of the hopper, and then passes through a flow path leading to the shutter unit, And it is discharged by opening the shutter.

However, since the solid agent has various physical properties (volume density, particle diameter, particle length, etc.), when spraying with the sprayer, the solid agent is blocked from the hopper outlet portion to the shutter portion, and the discharge amount is reduced. Or blockage, causing problems in spraying pesticides.

The clogging of the solid preparation can be solved by enlarging the eye of the mesh of the hopper portion or by thickening the flow path from the hopper to the shutter portion. However, since the cause of the blockage is complicated, not only the improvement of the seedling simultaneous sprayer but also the removal of the blockage by the improvement of the shape of the solid preparation is desired.

MEANS TO SOLVE THE PROBLEM The present inventors earnestly examined for the purpose of eliminating the blockage by improvement of the shape of the solid preparations which are thrown into a planting machine simultaneously, and, as a result, the solid preparations in the form of columnar granules containing an active ingredient of agrochemicals By limiting the number of particulates having a particle length, it has been found that the discharge amount of the seedling simultaneous spreader does not decrease or blockage occurs, and that the spraying of the solid preparation is carried out smoothly and stably, and the present invention has been completed.

Accordingly, the present invention provides a solid preparation containing the active ingredient of the pesticide, wherein the solid preparation is a columnar granule and the number of columnar granules having a particle length of 3.5 mm or more is 6 or less per 1 g of the solid preparation. It is to provide an improved solid preparation for special pesticides.

The present invention also provides a method for controlling harmful harmful organisms in water, characterized in that the above-mentioned solid spray agent for water-retaining agrochemicals is used at the same time as a planting machine, and applied to rice fields at the same time as planting.

In this specification, the "particle length" of a solid preparation means the distance between both bottom surfaces of the columnar granular material in the longitudinal direction.

The improved solid preparation of the water-retaining pesticide according to the present invention can be sprayed stably without the simultaneous spraying of the seedlings.

Pesticide active ingredients which can be contained in the solid preparation of the present invention include pesticides applied to faucets. Specifically, the compound which has biological activity contained in active ingredients, such as various insecticides (mite insecticides), fungicides, herbicides (plant regulators), a weakening agent, agricultural fertilizer, etc. can be mentioned, These can be used individually or in combination of 2 or more types, respectively. More specifically, for example, the following pesticide active ingredients can be exemplified, but are not limited thereto.

As the herbicidally active compound, for example, anilofos, bentiocarb, butachlor, carfenstrol, cumyluron, indanophan, dimepiperate, pentrazamide, mefenaceto, oxadione, oxazilomepon , Pentoxazone, pretilachlor, pyributicab, pyriphthalide, tenylchlor, oxadizyl, butamifos, esprocarb, dithiopyr, etobenzanide, pyriminobac-methyl, HOK-201, Sihalofop-butyl, metamipov, clomeprop, cyclosulfamuron, benfuresate, bensulfuron-methyl, benzobicyclone, benzophene, bromobutide, dimron, dimethamethrin, ethoxysulfuron, Imazosulfuron, pyrazolate, pyrazolesulfuron-ethyl, quinoclamine, pyrazoxifen, halosulfuron, pyraclonil, pyrimisulfan (KUH021), TH-547, mesotrione, phenoxulam, ortho Sulfamuron, simethrin, and bentazone. In addition to those exemplified above, herbicidally active compounds which can be used as herbicides for power transmission may also be included.

Examples of the insecticidal active compound include at least one selected from the group consisting of neonicotinyl insecticides, phenylpyrazole insecticides, carbamate insecticides and pyrethroid insecticides. Preferable examples of the neonicotinyl-based insecticide include imidacloprid, thiacloprid, acetamiprid, clotianidine, thiamethoxam, dinotefuran and the like. Preferred examples of the phenylpyrazole insecticide include fipronil, etiprolol and the like. Preferred examples of carbamate insecticides include propoxane, phenobucarb, benfuracarb, and carbosulphan. Preferred examples of pyridoid insecticides include etofenprox and cyclosal.

As a fungicidal compound, for example, capropamide, tricyclazole, probenazole, pyroquiron, diclocimet, thiadinil, isoprothiolane, IBP, phenoxanyl, azoxystrobin, metomistrobin Etc. can be mentioned.

The improved solid preparation of the water-insoluble pesticide of the present invention may be in the form of a conventional solid preparation generally used in pesticides, and may be formulated into a formulation such as granules, granules, hydrates, and the like.

Improved solid preparations of these agricultural pesticides can be produced by known methods per se. For example, they can be prepared by mixing the pesticide active ingredient with a carrier or a solid diluent and appropriately blending and granulating auxiliaries such as surfactants, binders, antidegradants, stabilizers, colorants, and the like, if necessary. .

Specific examples of the carrier may be exemplified below, but are not limited thereto. For example, mineral fine powders, such as clay, kaolin, biotite, zeeklite, talc, acidic clay, calcium carbonate, diatomaceous earth, zeolite; Organic substances such as corn starch; Inorganic substances, such as a synthetic aluminum silicate salt, are mentioned, Especially, a clay, a talc, and a calcium carbonate are preferable.

Although the following can be illustrated as a specific example of surfactant, it is not limited only to these. As anionic surfactants, for example, alkyl sulfate, polyoxyalkylene alkyl ether sulfuric acid, polyoxyalkylene alkylphenyl ether sulfuric acid, polyoxyethylene benzyl (or styryl) phenyl ether sulfuric acid or polyoxyethylene-polyoxypropylene blockpolymer sulfuric acid Sodium, calcium or ammonium salts; Alkyl sulfonic acid, dialkylsulfosuccinate, alkylbenzenesulfonic acid, mono- or di-alkylnaphthalenesulfonic acid, naphthalenesulfonic acid-formaldehyde-condensate, lignin sulfonic acid, polyoxyalkylene alkylphenyl ether sulfonic acid or Sodium, calcium, ammonium or alkanolamine salts of polyoxyethylene alkyl ether sulfosuccinates; Polyoxyethylene alkyl ether phosphate, polyoxyethylene mono- or di-alkylphenyl ether phosphate, polyoxyethylene benzyl (or styryl) phenyl ether phosphate, sodium or calcium salt of polyoxyethylene-polyoxypropylene-block polymer phosphate Can be mentioned. In addition, as the nonionic surfactant, for example, polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene alkylphenyl ether formaldehyde condensate, polyoxyethylene-polyoxypropylene-block polymer, polyoxyethylene- Polyoxypropylene-blockpolymer alkylphenyl ethers, polyoxyethylene benzyl (or styryl) phenyl ethers, polyoxyethylene-polyoxypropylene-blockpolymer benzyl (or styryl) phenyl ethers, sorbitan fatty acid esters, polyoxyethylene fatty acids Ester, polyethylene sorbitan fatty acid ester, polyoxyethylene castor oil ether, and the like.

Although the following can be illustrated as a specific example of a binder, It is not limited only to these. Starch-based natural products such as soluble starch, carboxymethyl starch and dextrin; Natural substances such as sodium alginate, gum arabic, gelatin, casein; Cellulose derivatives such as methyl cellulose and carboxymethyl cellulose sodium salt; Polyvinyl alcohol, polyvinyl methyl ether, polyvinylpyrrolidone, polyvinyl alcohol-vinyl alkyl ether copolymers; Polyacrylamide; Polymers or copolymers of acrylic acid, methacrylic acid or esters or salts thereof; Polyethylene glycol, polyethylene oxide; Emulsions of polymers or copolymers such as acrylic acid esters, vinyl chloride, vinyl acetate or styrene; Emulsions of copolymers of ethylene and vinyl acetate; Emulsion of the copolymer of vinyl acetate and an acrylic acid ester, etc. are mentioned. Especially, polyvinyl alcohol, dextrin, and carboxymethyl cellulose potassium salt are preferable.

The improved solid preparation of the agricultural pesticide for power transmission of the present invention can be easily produced by the same method as that for producing a general solid preparation (granulation, granule hydration, etc.). The grain length of the solid preparation can be adjusted by conditions such as the composition of the adjuvant, treatment with a particle sizing machine or coarse grinder, and / or sieving.

The improved solid preparation of the agrochemical pesticide of the present invention can be produced by mixing, for example, an agrochemical composition and auxiliary agents such as extenders, by adding water and auxiliary agents, mixing and granulating with an extrusion granulator. . The solid preparations obtained may contain long granules, but in this case, they may be passed through a granulator (e.g., maromerizer, Fuji Powder Co., Ltd.) or through a grinder (e.g., hammer mill, etc.) before drying. When the granular material is lightly disintegrated or classified into a sieve, the body can be adjusted to remove the long granular material. As a sieve, it is preferable to select a sieve having an eye slightly larger than the extrusion diameter (for example, if the extrusion diameter is 1 mm, a sieve having 1.40 mm or 1.18 mm is selected). In addition, the optimal body can be determined empirically by the sieve device principle or the driving situation.

Although the improved solid preparation of the water-insoluble pesticide of the present invention formulated as described above may generally contain the active ingredient of the pesticide in the range of 0.01 to 95% by weight, preferably 0.1 to 30% by weight, the content of the pesticide It can change suitably according to a kind etc.

The improved solid preparation of the water-retaining agrochemical of the present invention can be applied to rice fields by a method such as spraying, and preferably can be applied to rice fields at the same time as planting using a rice planting simultaneous sprayer.

Simultaneous planting spreader is a machine which can be mounted, for example, in a passenger planting plant, and can carry out pesticide spraying simultaneously. As a specific example, "brand name: Innovator Makube" (made by Maruyama Corporation) etc. are mentioned.

The improved solid preparation of the water-retaining agrochemical of the present invention is suitable for applying simultaneously with the seedlings using, for example, a seedling simultaneous spraying machine, and the spraying amount of the solid preparations is, for example, 1 hectare per paddy field, 1 to 60 kg as the solid preparation, Preferably, the range of 2.5-30 kg can be illustrated.

The improved solid preparation of the water-infested pesticide of the present invention, which is suitable for application to faucets using a seedling simultaneous sprayer, may be in the form of columnar granules. For example, a polygonal column, such as a circumference and a tetragon, is mentioned, Preferably, a circumference, especially preferably a staff column, is mentioned.

The improved solid preparation of the water-insoluble pesticide of the present invention has a bottom diameter (in the case of a circumference, the diameter of a circle, and in the case of a polygonal column, the maximum length between polygonal diagonal tops. These are hereinafter referred to as "particle diameters"). It is preferable to exist in the range of this normally 0.3-1.7 mm, especially 0.5-1.2 mm.

It is preferable that the improved solid preparation of the agricultural pesticide for power transmission of this invention contains the granular material with a big particle length as much as possible. In order to prevent the reduction of the discharge amount or the blockage in the simultaneous spraying machine, it is important that the columnar granular material has a particle length of 3.5 mm or more, but the number is 6 or less per 1 g of the solid preparation. When the number exceeds six, as shown in Test Example 2 described later, a decrease in the discharge amount occurs, and when the number increases, clogging occurs, which is unsuitable for spraying by the simultaneous spraying machine.

Next, although an Example demonstrates this invention further more concretely, this invention is not limited only to these Examples.

( Example )

Formulation Example 1 (Formulation A)

Pentrazamide 2.0 parts by weight

Bensulfuron-methyl 0.75 parts by weight

97.25 parts by weight of mineral fines and auxiliary

After mixing the said amount of pentrazamide, bensulfuron-methyl, mineral fine powder, and an adjuvant, a kneaded material is obtained by kneading by adding an appropriate amount of water. The obtained kneaded material was granulated using an extruder granulator (extrusion diameter 0.8 mm), the obtained granules were decomposed and sieved to obtain a solid preparation of the present invention.

Formulation Example 2 (Formulation B)

0.6 parts by weight of cyclosulfamoron

Dimron 4.0 parts by weight

Pentrazamide 2.0 parts by weight

Mineral fines and auxiliaries 93.4 parts by weight

Using the composition described above, granules and decomposition were carried out in the same manner as in Formulation Example 1, and were filtered through a 1070 μm sieve to obtain a solid preparation of the present invention.

Formulation Example 3 (Formulation C)

Pentrazamide 2.0 parts by weight

Bromobutide 9.0 parts by weight

Bensulfuron-methyl 0.75 parts by weight

88.25 parts by weight of mineral fines and auxiliary

The composition was granulated and decomposed in the same manner as in Formulation Example 1, and was filtered through a 1180 μm sieve to obtain a solid preparation of the present invention.

Formulation Example 4 (Formulation D)

Pentrazamide 2.0 parts by weight

Bromobutide 7.5 parts by weight

Bensulfuron-methyl 0.51 part by weight

Dimron 4.5 parts by weight

85.49 parts by weight of mineral fines and auxiliaries

Using the composition described above, granules and decomposition were carried out in the same manner as in Formulation Example 1, and were filtered through a 1180 μm sieve to obtain a solid preparation of the present invention.

Formulation Example 5 (Comparative a)

Pentrazamide 2.0 parts by weight

Bromobutide 7.5 parts by weight

Bensulfuron-methyl 0.51 part by weight

Dimron 4.5 parts by weight

85.49 parts by weight of mineral fines and auxiliaries

The composition was granulated (but not decomposed) in the same manner as in Formulation Example 1 to obtain a comparative formulation.

Formulation Example 6 (Comparative b)

Cyclosulfamuron 0.2 parts by weight

Pentoxazone 1.5 parts by weight

Mineral fine powder and auxiliary 98.3 parts by weight

Using the composition described above, granulation was carried out in the same manner as in Preparation Example 1, except that it was not decomposed to obtain a comparative formulation.

Formulation Example 7 (Comparative c)

0.6 parts by weight of cyclosulfamoron

Dimron 4.0 parts by weight

Pentrazamide 2.0 parts by weight

Mineral fines and auxiliaries 93.4 parts by weight

Using the composition described above, granulation was carried out in the same manner as in Preparation Example 1, except that it was not decomposed to obtain a comparative formulation.

Test Example 1 :

Method of measuring the number of granular materials having a particle length of 3.5 mm or more

Reduce 1 kg of solids to about 4 g and weigh (Wg). Among them, the number of granular materials having a length of 3.5 mm or more is measured (T pieces), and the number per 1 g of the granular materials having a length of 3.5 mm or more is calculated by the following equation.

Number per g of granular material having a length of 3.5 mm or more (pieces / g) = T / W

By the above method, the number per g of the granular material which has a particle length of 3.5 mm or more of each formulation obtained by the said formulation example was computed. The results are shown in Table 1.

Solid preparations Average particle size of solid preparation (mm) Number per g of granular material having a particle length of 3.5 mm or more of each solid preparation (pieces / g) Formulation A 0.8 1.8 Formulation B 0.9 3.3 Formulation C 0.8 5.0 Formulation D 0.8 5.2 Comparative Preparation a 0.8 7.6 Comparative preparation b 1.2 12.5 Comparative agent c 0.9 17.1

Test Example 2 :

Spray test by simultaneous granulation machine (change of discharge amount)

Use the product name: Innovator Makube (manufactured by Maruyama Co., Ltd.) as a simultaneous granulation machine for planting, put each solid preparation (approximately 4 kg) into the hopper for 15 minutes (spread), and then operate for 15 minutes. The discharge amount g during the period of implementation was measured in units of 1 minute. The change in discharge amount was calculated by the following equation.

Change in discharge amount (g / min) = discharge amount per minute (g) / discharge amount in the first minute (g)

The determination criteria of the discharge amount of each solid preparation are as follows.

Stable: → The change in discharge amount is 0.90 to 1.10 in at least 12 of 15 measurement times.

Decrease: 10 times or less in 15 measurement times, the change of discharge amount is 0.90-1.10, or the change of discharge amount is 0.80 or less even once.

Clogging: → The change in discharge amount is 0.50 or less, more than half of the number of measurements.

Solid formulations whose determination results are "stable" are suitable for spraying by a simultaneous granulation machine, and solid formulations determined to be "reduced" or "blocked" are not suitable for spraying.

The said test is done about formulation (A-D) and comparative formulation (a-c), and the result of the change of the discharge amount is shown in Table 2.

Spray test by simultaneous granulation machine (change of discharge amount) (g / min) Formulation A Formulation B Formulation C Formulation D Comparative Preparation a Comparative Preparation b Comparative Preparation c Number of granules (Note 1) 1.8 3.3 5.0 5.2 7.6 12.5 17.1 1 minute 1.00 1.00 1.00 1.00 1.00 1.00 1.00 2 minutes 1.00 1.00 1.04 1.02 1.02 1.51 0.27 3 minutes 1.00 1.03 1.03 1.02 0.41 0.33 0.24 4 minutes 0.97 1.00 1.01 1.00 0.86 0.22 0.12 5 minutes 1.00 0.99 1.00 1.01 0.99 0.33 0.32 6 minutes 0.98 1.00 1.02 1.03 1.00 0.86 0.30 7 minutes 0.98 1.03 1.05 1.02 1.00 0.58 0.17 8 minutes 0.96 1.04 1.04 1.03 0.66 0.40 0.17 9 minutes 0.96 0.99 1.03 1.06 0.91 0.85 0.06 10 minutes 0.98 0.95 1.04 1.06 1.01 0.30 0.31 11 minutes 0.96 1.01 1.04 1.03 0.92 0.42 0.20 12 minutes 0.98 1.03 1.04 0.98 0.83 0.74 0.20 13 minutes 1.00 0.97 1.03 1.04 0.69 0.34 0.21 14 minutes 1.00 0.96 1.02 1.06 0.75 0.31 0.24 15 minutes 0.99 1.02 1.01 1.01 0.94 0.76 0.23 Judgment stability stability stability stability decrease catch catch

(Note 1) Number per 1 g of granular material having a particle length of 3.5 mm or more of each solid preparation (pieces / g)

The improved solid preparation of the water-retaining pesticide of the present invention is sprayed stably without blocking the seeding simultaneous sprayer.

Claims (3)

A solid preparation containing an agrochemical active ingredient, wherein the solid preparation is a columnar granule and the number of granular matters having a particle length of 3.5 mm or more is 6 or less per 1 g of the solid preparation. . A method for controlling harmful pests in a water plant, comprising applying the improved solid preparation of the water-retaining pesticide according to claim 1 to a rice field simultaneously with a seeding plant using a simultaneous spraying machine. Use of an improved solid preparation according to claim 1 for controlling harmful organisms in a faucet.