JP2515537B2 - Pesticide powder - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pesticide powder, and more particularly to a pesticide powder having improved sprayability and adhesion to plants.

Conventional technology In general, pesticide active substances, especially pesticide active substances in powders, are required to have their original effects sufficiently exerted on plants, in order to improve the dispersibility of such powders and to efficiently distribute the active substances to the plants. First, it is essential that the active substance on the plant body penetrates well into the body and that rain resistance and the like are enhanced. The agents have not been fully clarified yet, and at present, surfactants having various functions such as penetration, dispersion, wetting and spreading are used in combination according to the purpose. Alkylsulfosuccinate ester salts have also been used as one of these surfactants as an additive for agricultural chemicals.

The alkyl sulfosuccinate salt (hereinafter referred to as A) is represented by the general formula (In the formula, R'and R "represent an alkyl group having 8 to 20 carbon atoms, and B represents a metal ion or an ammonium group.)
It has been used as a wetting / dispersing agent in liquids such as emulsions and wettable powders.

However, (A) has a characteristic that it easily aggregates, and in particular, when (A) is added to the powder, it has a drawback that aggregates are formed and it becomes difficult to use.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention provides an agrochemical powder containing such (A) but having excellent cohesiveness, sprayability and adhesiveness.

Means for Solving the Problems The present inventors have conducted various studies on auxiliary agents and additives for agricultural chemical powders, and as a result, have conventionally been used exclusively as liquids such as wettable powders as wetting / dispersing agents. It was surprisingly found that if (A) is added to a dust and sufficiently pulverized, the dispersibility of the dust is significantly improved and the adhesion to plants is also improved. That is, pesticide active ingredient, clay, etc.
Aggregates are produced when (A) is added, but the agrochemical powder obtained by pulverizing these agglomerates to a sufficiently fine state is
It has been found that not only the fluidity is improved and more uniform spraying is possible, but also the pesticide active substance can be efficiently attached to the plant body. Furthermore, the inventors have found that in particular 4,6
-Dimethyl-2- [1- (o-tolyl) -1-ethylidene-hydrazino] pyrimidine (hereinafter abbreviated as compound M), 4,5,6,7-tetrachlorophthalide (hereinafter abbreviated as fusaride) .) And 5-methyl-1,2,4-triazolo [3,4-b] benzothiazole (hereinafter abbreviated as TC) and the like, when (A) is added, the bactericidal effect is exhibited. The present invention was completed by confirming that the effect of (A), among various additives, is extremely excellent for pesticide powders for sterilization. .

That is, the present invention contains the above (A),
150 agglomerates of the pesticide and the active ingredient or / and carrier
The present invention relates to a pesticide powder which is finely pulverized to μ or less. More specifically, for auxiliary carriers such as pesticide active ingredients and clay for powders,
The agglomerates generated when (A) was added were identified as September 20, 1978.
As of the date, the dry measurement described in “Test method for physical properties” in the attached sheet of “Data required for new application for DL powder” determined by the Agricultural Chemicals Laboratory, the particle size of 150μ or less, crushed The present invention relates to a pesticide dusting agent, which has improved spraying properties and adhesion to plants, and has improved the efficacy of pesticide active ingredients.

As (A) used in the present invention, in the general formula (I), R ′ and R ″ are alkyl groups having 8 to 20 carbon atoms, preferably octyl, nonyl, decyl, undecyl, dodecyl, tridecyl and tetradecyl. , Straight chain alkyl groups such as pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl or eicosanyl, more preferably octyl, nonyl, decyl, undecyl, dodecyl and tridecyl groups, and B is a metal ion or ammonium. The group is preferably an alkali metal ion, an alkaline earth metal ion or an ammonium group, and more preferably a sodium or potassium ion.

Examples of the agricultural chemical active substance used in the present invention include organic sulfur fungicides such as ethylenebis (dithiocarbamate) zinc, ethylenebis (dithiocarbamate) manganese, ethylenebis (dithiocarbamine) ammonium, and bis (dimethyldithiocarbamate) ethylenebis ( Dithiocarbamic acid) Dizinc, etc. Organic phosphorus bactericides ... S-benzyl O, O-thiophosphate
Diisopropyl dithiophosphate S, S-diphenyl O
-Organic arsenic fungicides such as ethyl ... Fungal methanearsonate, ammonium iron methanarsonate, etc. Organic base fungicides ... Pentachlorophenol, tetrachloroisophthalonitrile, phthalides and other fungicides ... Compounds M, TC, N- (Trichloromethylthio) -4-cyclohexene-1,2-dicarboximide, phenazine 5-oxide, 1- (butylcarbamoyl) -2-benzimidazole carbamate Methyl, etc. Organic phosphorus insecticides ... MEP, dithiophosphate S- [ 1,2-
Bis (ethoxycarbonyl) ethyl] O, O-dimethyl,
Phosphoric acid 2,2-dichlorovinyldimethyl, 2,2,2-trichloro-1-hydroxyethylphosphonic acid dimethyl, N-
Acetylphosphoramide thiolate O, S-dimethyl,
Dimethyl (E) -1-methyl-2-methylcarbamoyl vinyl phosphate, O, O-dimethyl S-dithiophosphate S-
[Α- (Ethoxycarbonyl) benzyl], dithiophosphate O, O-dimethyl S- (N-methylcarbamoylmethyl), etc. Organochlorine insecticides: 6,7,8,9,10,10-hexachloro-
1,5,5a, 6,9,9a ... Hexahydro-6.9-methano-2,4,3-
Carbamate insecticides such as benzodioxathiepine 3-oxide 1-naphthyl methylcarbamate, m-tolyl methylcarbamate, o- (sec-butylphenyl) methylcarbamate (hereinafter abbreviated as BPMC), etc. Pyrethroid insecticides ... Antibiotics such as pyrethrins, allethrins and resmethrins… Other insecticides such as blasticidin S, kasugamycin, polyoxine, oxytetracycline… cartap, S-methyl N- (methylcarbamoyloxy) thioacetimidate.

However, the invention is not limited to these examples.

The carrier / auxiliary component is not particularly limited, but more specifically, for example, clays (kaolin, bentonite,
Acid clay), talc (talc powder, wax powder, etc.),
In addition to mineral powders such as silicas (diatomaceous earth, mica powder, etc.), solid carriers and auxiliary components such as calcium carbonate, sulfur powder, activated carbon are often used. Further, wetting agents, stabilizers, solvents, spreading agents, preservatives and the like which do not impair the effects of the pesticide powder of the present invention may be added as appropriate.

The amount of the additive (A) used in the present invention is not particularly limited, but it is particularly effective to use 0.1 to 5 parts by weight, preferably 0.2 to 2 parts by weight, based on 100 parts by weight of the powder. The pesticide active ingredient is usually 0.0 per 100 parts by weight of the powder.
It is used in an amount of 001 to 50 parts by weight, preferably 0.001 to 20 parts by weight, but the amount used is not particularly limited.

In the present invention, one or more of the above-mentioned pesticide active substances may be used in combination.

In the present invention, the additive (A) may be added to these pesticidal active ingredients, or the additive (A) may be added to the pesticidal active ingredient plus clay for dusting agent, The mixture containing the agglomerates generated at that time, using an atomizer, etc.
The powder of the present invention is obtained by finely pulverizing to a particle size of .mu. or less and further adding an auxiliary such as clay or a carrier, if desired, and mixing.

Effect In the present invention, the disadvantage of aggregation caused by the additive (A) is overcome by finely pulverizing the components as described above,
On the other hand, by adding (A), the pesticide powder improves the fluidity and sprayability, and also improves the adhesion on the plant body. INDUSTRIAL APPLICABILITY The present invention sufficiently exhibits the above-mentioned effects by the action of the additive (A) alone without using any other auxiliary agent, and as a result, the pesticidal active ingredient can efficiently exert its effect. It leads to the enhancement of drug efficacy.

Examples Examples of the present invention will be shown below, but the present invention is not limited to these examples.

Example 1 2 parts by weight of compound M, 1.5 parts by weight of phthalide and additive (A) (100 parts by weight in total of 1 part by weight of R'and R'in the above general formula (I) are octyl groups and B is Na). Atomizer (Hosokawa Iron Works Co., Ltd.)
Manufactured) and pulverized and mixed with a ribbon mixer to obtain a dust.

Example 2 2 parts by weight of compound M, 0.5 parts by weight of TC, 1 part by weight of additive (A) (in the general formula (I), R ′ and R ″ are both tridecyl groups and B is Na), and 100 parts by weight in total. Clay for dusting agent was added, crushed in a mortar, and mixed to obtain a dusting agent.

Example 3 Compound M 2 parts by weight, phthalide 1.5 parts by weight, BPMC 2 parts by weight, additive (A) (in the above general formula (I), R ', R "
Is a tridecyl group and B is Na) 1 part by weight, 2 parts by weight of white carbon and 100 parts by weight of clay for dusting agent are added, pulverized by an atomizer (manufactured by Hosokawa Iron Works Co., Ltd.), and mixed by a ribbon mixer. The powder was obtained.

Example 4 2 parts by weight of compound M, additive (A) (the above general formula (I)
R'and R "are both pentadecyl groups and B is Na) 1 part by weight and 1 part by weight of white carbon with 100 parts by weight of clay for dusting agent, and atomized (manufactured by Hosokawa Iron Works Co., Ltd.) Then, the powder was obtained by mixing with a Nauter mixer.

Example 5 1 part by weight of TC, 0.5 part by weight of additive (A) (in the above general formula (I), R'and R "both represent an octyl group and B represents Na) and 100 parts by weight in total of 1 part by weight of white carbon. The powdery clay was added to the powder, pulverized with an atomizer (manufactured by Hosokawa Iron Works Co., Ltd.), and mixed with a ribbon mixer to obtain a powder.

Effects of the Invention Next, in the pesticide powder of the present invention, sprayability is improved,
Test examples are shown in order to explain in more detail that the effect as a pesticide is improved as a result of the medicinal effect of the pesticide active substance being sufficiently exhibited.

That is, Test Example 1 shows the biological test results, and Test Example 2 shows the fluidity test results as the characteristics for improving the dispersibility.

In addition, here, the powders prepared by excluding the additive (A) according to the above Examples 1 to 5 were set as Comparative Examples 1 to 5, respectively, and compared and compared with the present invention.

Test Example 1 Test method 1. Pathogenic bacterium: Pyricularia oryzae 2. Test plant: Rice cultivar New thousand new plants for 6 weeks. Cultivated seedling
10 stalks / 9 cm pot 3. Inoculation: Sprayed under natural infection from blast-damaged leaves and exposed for 2 days. One part of the treated area was exposed to blast infection after drug treatment.

4. Chemical treatment: The formulations prepared in Examples and Comparative Examples were sprayed on rice with a bell jar duster type duster at a rate of 3 g / 12 pots / m ² (corresponding to 3 kg / 10 a). Immediately after spraying 1)
Section where it is left as it is, 2) Section where it is shaken with a reciprocal shaker for 1 minute to see the adhesion to rice, 3) Section where it is exposed to artificial wind with an average wind speed of 2 m for 10 minutes, and 4) It takes about 30 minutes A section for treating 15 mm of artificial rainfall was set up and the performance of the formulations was compared.

After the treatment, the rice thus treated was kept in a humid chamber under high humidity conditions.

5: Survey: One week after the chemical treatment, the survey was conducted according to “Criteria for the occurrence rate of leaf blast” (page 4-7) of “Criteria for pest occurrence survey” (S.49.2.19) issued by the Japan Plant Protection Association.

Test results Test Example 2 Test method: According to the official pesticide law.

(Method according to Agricultural Chemicals Laboratory Report No. 23) Test results: As is apparent from Test Examples 1 and 2, the additive (A) of the present invention
The contained pesticide powder suppresses the spread of lesions remarkably compared to the normal powder, so the active ingredient is efficiently used,
As a result of the drug having been sufficiently exerted, it was found that the efficiency was enhanced as a pesticide, and at the same time, the sprayability was improved, which is supported by the remarkable improvement in fluidity.

Claims (2)

(57) [Claims] 1. A pesticide powder comprising an alkyl sulfosuccinate ester salt, which is formed by finely pulverizing aggregates of the alkyl sulfosuccinate ester salt and the pesticidal active ingredient or / and a carrier to 150 μm or less. 2. As a pesticide active ingredient, 4,6-dimethyl-2
-[1- (o-Tolyl) -1-ethylidene-hydrazino] pyrimidine; 4,5,6,7-tetrachlorophthalide; 5-methyl-1,2,4-triazolo [3,4-b] benzo The pesticide powder according to claim 1, comprising one or more thiazoles.