JP2000143403A - Agrochemical granule - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an agrochemical granule promoting the elution of an agrochemically active ingredient by including the agrochemically active ingredient, a sodium ligninsulfonate, a polyoxyethylene-polyoxypropylene block copolymer-styryl-phenyl ether sodium sulfate, and the like. SOLUTION: This agrochemical granule contains (A) an agrochemically active ingredient hardly soluble in water, preferably having <=80 ppm solubility in water at 20 deg.C, e.g. chlorpyrifos-methyl, diazinon and flutolanil, (B) a sodium ligninsulfonate, (C) a polyoxyethylene-polyoxypropylene block copolymer-styryl- phenyl ether sodium sulfate, (D) a carboxymethylcellulose sodium, and (E) a carrier (e.g. a mixture of bentonite and clay). The contents of the components A, B, C and D are 0.1-30 pts.wt., 0.1-20 pts.wt. 0.5-7 pts.wt. and 0.1-10 pts.wt. respectively based on 100 pts.wt. granule.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to pesticide granules.
More specifically, the present invention relates to a pesticide granule in which the dissolution of a pesticide active ingredient is promoted.

[0002]

2. Description of the Related Art In recent years,
As cultivation of paddy rice, transplanted rice cultivation using a rice transplanter is widely performed. At this time, early cultivation of rice is carried out using nursery rice. In addition, nursery boxes are used as a kind of soil application for controlling various diseases.
In other words, for the purpose of controlling pests at the early stage of paddy rice in rice after transplanting, chemicals such as granules are applied from the seedling to the rice seedling in the seedling box from the top of the rice seedling in the seedling box until just before transplanting to the rice field. It has been applied to granules. The dispersed granules are transported to Honda with transplantation, and the pesticidal active ingredients in the granules are effectively absorbed by the rice body as in the case of growing the nursery box. Also brings the nature.

[0003] However, in the case of pesticidal active ingredients having low water solubility, there are cases where the dissolution is slow and sufficient drug effects cannot be achieved. Therefore, in the case of pesticide granules containing a poorly water-soluble pesticide active ingredient as an active ingredient, it is important to promote the elution of the active ingredient.

[0004]

The present inventors have conducted intensive studies to solve the above-mentioned problems. As a result, in addition to the pesticidal active ingredient and sodium ligninsulfonate, the present inventors have found that a polyoxyethylene polyoxypropylene block has been obtained. The present inventors have found that a granule containing the copolymer sodium styrylphenyl ether sulfate and sodium carboxymethylcellulose has an effect of promoting the dissolution of the pesticidal active ingredient, and completed the present invention.

[0005] Thus, the present invention provides a method for the elution of a pesticidal active ingredient characterized by comprising a pesticidal active ingredient, sodium lignin sulfonate, polyoxyethylene polyoxypropylene block copolymer sodium styrylphenyl ether sulfate, sodium carboxymethylcellulose and a carrier. An accelerated pesticide granule is provided.

According to the present invention, a conventional pesticide granule comprising an active ingredient of pesticide and sodium ligninsulfonate is further added with sodium polyoxyethylene polyoxypropylene block copolymer styrylphenyl ether sulfate,
By blending a mixture of sodium carboxymethylcellulose, elution of the pesticidal active ingredient in the pesticide granule is promoted, and the pest control effect of applying the granule to a nursery box can be improved.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the pesticide granule of the present invention will be described in more detail.

[0008] The sodium ligninsulfonate used in the pesticide granules of the present invention is a kind of anionic surfactant which has an action of promoting the dispersion of the pesticidal active ingredient. Generally it can be in the range of about 0.1 to about 20 parts by weight, preferably about 0.5 to about 5 parts by weight.

The polyoxyethylene polyoxypropylene block copolymer sodium styryl phenyl ether sulfate used in the pesticide granule of the present invention comprises:
It is a kind of anionic surfactant and, when used in combination with sodium carboxymethylcellulose, further promotes elution of the pesticidal active ingredient. The mixing amount is 10 pesticide granules.
A range of about 0.5 to about 7 parts by weight, especially about 1 to about 6 parts by weight, per 0 parts by weight is preferred.

Further, sodium carboxymethylcellulose used in the pesticide granule of the present invention is a kind of disintegrant, and as described above, it is used in combination with sodium polyoxyethylene polyoxypropylene block copolymer styryl phenyl ether sulfate. It has the effect of promoting the dissolution of pesticidal active ingredients. The amount may be generally in the range of about 0.1 to about 10 parts by weight, preferably about 0.5 to about 6 parts by weight, per 100 parts by weight of the pesticide granule.

The pesticidal active ingredient to be added to the pesticide granules of the present invention is not particularly limited, but is usually water 20 ° C.
The poorly water-soluble agrochemical active ingredient having a solubility in water of 80 ppm or less, particularly 50 ppm or less is preferred. Specific examples of such a pesticidal active ingredient include the following compounds, but are not limited thereto. Insecticidally active compound: O, O-dimethyl-O-3,5,6-trichloro-2-pyridyl phosphorothioate (generic name:
Chlorpyrifosmethyl), (2-isopropyl-4-methylpyrimidyl-6) -diethylthiophosphate (generic name: diazinon), O, O-diethyl-S-2-
(Ethylthio) ethyl phosphorodithioate (generic name:
Ethylthiomethone), O, O-dimethyl-O- [3-methyl-4- (methylthio) phenyl] thiophosphate (generic name: phenthion), 2,2-dimethyl-1,3-
Benzodioxol-4-ylmethylcarbamate (generic name: bendiocarb), ethyl N- [2,3-dihydro-2,2-dimethylbenzofuran-7-yloxycarbonyl (methyl) aminothio] -N-isopropyl-β- Alaninato (generic name: benfracarb), 2,
3-dihydro-2,2-dimethyl-7-benzo [b] furanyl N-dibutylaminothio-N-methylcarbamate (generic name: carbosulfan), butyl 2,3-
Dihydro-2,2-dimethylbenzofuran-7-yl
N, N'dimethyl-N, N'-thiodicarbamate (general name: furatiocarb), (RS) -α-cyano-3-phenoxybenzyl (RS) -2,2-dichloro-1-
(4-ethoxyphenyl) cyclopropanecarboxylate (generic name: cycloprothrin), 2- (4-ethoxyphenyl) -2-methylpropyl 3-phenoxybenzyl ether (generic name: ethofenprox),
S, S'-2-dimethylaminotrimethylene di (benzenethiosulfonate) (generic name: bensultap),
2-tert-butylimino-3-isopropyl-5
-Phenyl-3,4,5,6-tetrahydro-2H-1,
3,5-thiadiazin-4-one (generic name: buprofezin), and the like. Fungicidal compound: α, α, α-trifluoro-3′-isopropoxy-o-toluanilide (general name: flutranyl), diisopropyl 1,3-dithiolan-2-ylidene-malonate (general name: isoprothiolane), (1
RS, 3SR) -2,2-dichloro-N- [1- (4-chlorophenyl) ethyl] -1-ethyl-3-methylcyclopropanecarboxamide (general name: carpropamide) and the like.

In the pesticidal granules of the present invention, the above-mentioned pesticidal active ingredients can be used alone or in combination of two or more.

The amount of the agrochemical active ingredient can be varied depending on the kind and the like, but is generally about 0.1 to about 30 parts by weight, preferably about 0.5 to about 25 per 100 parts by weight of the agrochemical granule. A range of parts by weight is suitable.

The poorly water-soluble pesticidal active ingredient is prepared by adding water at 20 ° C.
May be used in combination with other pesticidal active ingredients having a solubility of more than 80 ppm. Examples of such other pesticidal active ingredients include, but are not limited to, the following compounds. 1- (6-chloro-3-pyridylmethyl) -N-nitroimidazolidin-2-i

Ridenamine (generic name: imidacloprid), 3- (6-chloro-3-pyridylmethyl) -2-
Cyanoiminothiazolidine (generic name: thiacloprid), (E) -N- (6-chloro-3-pyridylmethyl) -N-ethyl-N'-methyl 2-nitrovinylidenediamine (generic name: nitenpyram), 2-iso Propoxyphenyl-N-methylcarbamate (generic name: propoxur), 2-secondary-butylphenyl-N-methylcarbamate (generic name: BPMC), 1-naphthyl-
N-methyl carbamate (general name: carbaryl), 1,
3-bis (carbamoylthio) -2- (N, N-dimethylamino) propane hydrochloride (general name: cartap), 5
-Dimethylamino-1,2,3-trithiane oxalate (generic name: thiocyclam), O, O-dimethyl-S-
(N-methylcarbamoylmethyl) dithiophosphate (generic name: dimethoate), methyl N- (2-methoxyacetyl) -N- (2,6-xylyl) -DL-alaninate (general name: metalaxyl), 3-allyloxy- 1,2-benzisothiazole-1,1-dioxide (generic name: probenazole), 5-methyl-1,2,4-
Triazolo [3,4-b] benzazole (generic name: tricyclazole), 1,2,5,6-tetrahydropyrrolo [3,2,1-ij] quinolin-4-one (generic name: pyroquilon), O, O-diisopropyl-S-benzylthiophosphate (generic name: IBP) and the like.

The carrier used in the pesticide granules of the present invention is a mixture of bentonite and other carriers, and the amount of the blend is generally about 1 to about 15 weight parts per 100 parts by weight of the pesticide granules. Parts, preferably about 5
Within the range of about 10 parts by weight, and other carriers are generally about 18 to about 92.7 parts by weight, preferably about 48 to about 92.5.
A range of parts by weight is suitable. As the other carrier, for example, clay, talc, kaolin, perlite,
Examples include white carbon, calcium carbonate, pumice, diatomaceous earth, and calcined diatomaceous earth. These other carriers may be used alone or in combination of two or more.

According to the present invention, the amount of bentonite used as a carrier can be reduced, whereby
It is possible to prevent so-called dirt, that is, adhesion of granules to the rice growing in the nursery box. Further, the bentonite having the above-mentioned amount also exerts an auxiliary effect of promoting the dissolution of the poorly water-soluble agrochemical active ingredient.

The pesticide granule of the present invention may optionally contain, in addition to the above components, pesticide additives such as a binder, a decomposition inhibitor, a coloring agent, and a safener.

The pesticidal granules of the present invention can exert a strong insecticidal and bactericidal effect on seedling boxes and rice in paddy fields by using insecticides and fungicides as active ingredients for pesticides.
Therefore, the pesticidal granules of the present invention, insecticide in nursery boxes and paddy fields,
It can be advantageously used as a sterilizing granule.

The pesticidal granules of the present invention can be produced according to a generally employed method for producing granules. For example, a pesticidal active ingredient, sodium lignin sulfonate, sodium carboxymethyl cellulose and a carrier are mixed, and to this mixture, an aqueous solution of sodium polyoxyethylene polyoxypropylene block copolymer styryl phenyl ether sulfate is added, kneaded, and extruded with an extruder. After granulating and drying in a fluidized bed dryer, the target pesticide granules can be obtained by sizing.

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

[0022]

Examples Formulation Example 1 Bulk carpropamide (70%) 6.0 parts by weight Sodium ligninsulfonate 2.0 parts by weight Sodium polyoxyethylene polyoxypropylene block copolymer styryl phenyl ether sulfate 5.0 parts by weight Sodium carboxymethyl cellulose 5 6.0 parts by weight Bentonite 6.0 parts by weight Calcined diatomaceous earth 10.0 parts by weight Talc 66.0 parts by weight Carpropamide bulk powder, sodium lignin sulfonate, sodium carboxymethyl cellulose,
Bentonite, calcined diatomaceous earth and talc are mixed, and an aqueous solution of polyoxyethylene polyoxypropylene block copolymer sodium styryl phenyl ether sulfate is added to the mixture, kneaded, extruded with an extruder, granulated, and dried with a fluid bed dryer. Dried, sized,
Granules were obtained.

The following Formulation Examples 2 to 5 and Comparative Formulation Examples 1 to
Each component of the formulation shown in No. 3 was treated in the same manner as in Preparation Example 1 to obtain granules. Formulation Example 2 Bulk carpropamide powder (70%) 6.0 parts by weight Sodium ligninsulfonate 2.0 parts by weight Polyoxyethylene polyoxypropylene block copolymer sodium styrylphenyl ether sulfate 2.0 parts by weight 2.0 parts by weight sodium carboxymethylcellulose Bentonite 6.0 parts by weight Calcined diatomaceous earth 10.0 parts by weight Talc 72.0 parts by weight Preparation example 3 Bulk carpropamide (70%) 6.0 parts by weight Sodium ligninsulfonate 4.0 parts by weight Polyoxyethylene polyoxypropylene Block copolymer sodium styryl phenyl ether sulfate 5.0 parts by weight Sodium carboxymethyl cellulose 5.0 parts by weight Bentonite 9.0 parts by weight Calcined diatomaceous earth 5.0 parts by weight Talc 66.0 parts by weight Formulation example 4 Ethyl thiomethone bulk (95% 5.7 parts by weight Sodium ligninsulfonate 2.0 parts by weight Polyoxyethylene polyoxypropylene block copolymer Sodium styrylphenyl ether sulfate 5.0 parts by weight Sodium carboxymethylcellulose 5.0 parts by weight Bentonite 6.0 parts by weight Calcined diatomaceous earth 10 6.0 parts by weight Talc 66.3 parts by weight Formulation Example 5 Bulk carpropamide (70%) 6.0 parts by weight Bulk imidacloprid 3.0 parts by weight Sodium ligninsulfonate 2.0 parts by weight Polyoxyethylene polyoxypropylene block copolymer Sodium styryl phenyl ether sulfate 5.0 parts by weight Sodium carboxymethyl cellulose 5.0 parts by weight Bentonite 6.0 parts by weight Calcined diatomaceous earth 10.0 parts by weight Talc 63.0 parts by weight Comparative preparation example 1 bulk powder of carpropamide (70% 6.0 parts by weight Sodium ligninsulfonate 2.0 parts by weight Sodium carboxymethylcellulose 5.0 parts by weight Bentonite 6.0 parts by weight Calcined diatomaceous earth 10.0 parts by weight Talc 71.0 parts by weight Comparative preparation example 2 Carpropamide bulk powder ( 70%) 6.0 parts by weight Sodium lignin sulfonate 2.0 parts by weight Sodium polyoxyethylene polyoxypropylene block copolymer styryl phenyl ether sulfate 5.0 parts by weight Bentonite 6.0 parts by weight Calcined diatomaceous earth 10.0 parts by weight talc 71.0 parts by weight Comparative preparation example 3 Bulk carpropamide powder (70%) 6.0 parts by weight Sodium ligninsulfonate 2.0 parts by weight Polyoxyethylene polyoxypropylene block copolymer Sodium styrylphenyl ether sulfate 5.0 parts by weight Carboxymethyl Cellulo Susodium 5.0 parts by weight Calcined diatomaceous earth 10.0 parts by weight Talc 72.0 parts by weight Test Example 1 (dissolution test) 1500 ml of water was placed in a pot (19 × 28 × 8 cm), and Formulation Examples 1, 2, 3, 150 mg of each of the preparations 4 and Comparative Preparation Examples 1, 2, and 3 was weighed and thrown into each pot. One, two, three, five, seven, nine, eleven, and fourteen days after the introduction, a portion of water was collected, and the concentration of eluted carpropamide or ethyl thiomethone was measured by high performance liquid chromatography. The results are shown in Table 1 below.

[0024]

[Table 1]

[0025]

As is apparent from the results of the above test examples, the pesticide granules of the present invention containing a mixture of sodium polyoxyethylene polyoxypropylene block copolymer styryl phenyl ether sulfate and sodium carboxymethyl cellulose do not contain them. It has the effect of promoting the dissolution of poorly water-soluble agrochemical active ingredients compared to the comparative granules. Further, the pesticide granule of the present invention promotes the dissolution of the pesticide active ingredient as compared with the corresponding granule containing no bentonite.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A01N 43/28 A01N 43/28 43/88 101 43/88 101 47/22 47/22 G 47/24 47 / 24 G 53/08 57/12 E 53/12 57/14 D 57/12 57/16 102B 57/14 103C 57/16 102 53/00 508D 103 510

Claims (4)

[Claims] 1. A pesticide wherein the dissolution of a pesticide active ingredient is promoted, comprising an agrochemical active ingredient, sodium lignin sulfonate, polyoxyethylene polyoxypropylene block copolymer sodium styryl phenyl ether sulfate, sodium carboxymethyl cellulose, and a carrier. Granules. 2. The pesticide granule according to claim 1, wherein the pesticide active ingredient is a poorly water-soluble pesticide active ingredient having a solubility at 20 ° C. of water of 80 ppm or less. 3. The pesticidal active ingredient is chlorpyrifosmethyl, diazinon, ethylthiomethone, fenthion,
The pesticide granule according to claim 1 or 2, wherein the pesticide granule is at least one selected from bendiocarb, benflacarb, carbosulfan, flatiothiocarb, cycloprothrin, etofenprox, bensultap, buprofezin, flutolanil, isoprothiolane and carpropamide. 4. A carrier comprising clay, talc, kaolin, perlite, white carbon, calcium carbonate, pumice,
The pesticide granule according to any one of claims 1 to 3, which is a mixture of at least one selected from the group consisting of diatomaceous earth and calcined diatomaceous earth with bentonite.