KR840001227B1 - Insecticide compositions - Google Patents

Abstract

3-Phenoxy-α-cyanobenzyl-1-(4-ethoxyphenyl)-2, 2-dichloro-cyclopropanecarboxylate-diazinon mixt. (I-II) is a synergistic insecticide. Thus, the topical LD50 of a I-II mixt. (4:2) was 1.2μg/adult housefly, as compared to 2.4 for I alone and 20 for II alone.

Description

Insecticide composition

The present invention is the active ingredient 3-phenoxy-α-cyanobenzyl-1- (4-ethoxyphenyl) -2,2-dichlorocyclopropane carboxylate of the following general formula (I) (hereinafter referred to as compound A) And O, O-diethyl-O-2-isopropyl-6-methylpyrimidin-4-ylphosphorothioate (hereinafter referred to as diazinon) of the following general formula (II) The present invention relates to a pesticide composition containing the above adjuvant and a method for controlling pests.

There are many pests in the world. For example, a typical pest that can be tested is housefly (Musuka domestica). Houseflies breed several times a year and serve as a carrier for infectious diseases. Occasionally, infectious diseases caused by houseflies reduce the number of eggs in chickens and the amount of milk in cows.

Cicada larvae are very harmful pests for rice. The pests reproduce five to six times a year, which significantly increases the number of egg cells. The pest harms rice by spreading various viral pathogens and sometimes reduces the quality of rice and reduces the yield of rice. Perennial moths and fluttering moths breed two to three times a year, and their larvae eat rice leaves over long periods of time, slowing the growth of rice.

As a result of repeated use of pesticides in recent years, pests have become resistant to pesticides, and therefore, it becomes more difficult to control pests.

In order to have a good control effect, it is necessary to increase the use of pesticides and to increase the frequency of use of pesticides. Therefore, problems arise in terms of safety in use, safety for humans and animals, and agricultural economy.

Therefore, more powerful pesticides are required. Insecticidal compositions containing Compound A and Diazinon have a more stable effect on pests resistant to organophosphorus or carbamate insecticides compared to Compound A or Diazinon, respectively, and can control pests more extensively. The inventors discovered.

The pesticidal composition of the present invention exhibits a synergistic effect without showing an additive effect depending on the properties of Compound A or diazinone.

Moreover, the use frequency of the composition of the present invention was reduced, and the amount of use was also lower than the total amount of the active ingredients used when the above materials were used alone. Therefore, safety in use and safety for humans and animals are also increased.

The composition of the present invention containing the diazinon of Compound A can be used in very small amounts, either directly or by incorporating other auxiliaries, as commonly used in emulsifiers, hydrating ingredients, powders, granules, aerosols, fluid emulsion concentrates and pesticides It can be used in the form of a microvolume formulation. If used, the preparations can be used as such or diluted with water to the desired concentration and used in the area where the pest or pest is inhabited.

Adjuvants used in the present invention are carriers (diluents), electrodeposition agents, emulsifiers, hydrating agents, dispersants, fixing agents.

Liquid carriers include petroleum fractions (e.g. kerosene and diesel), aromatic hydrocarbons (e.g. toluene and xylene, methyl-naphthalene, cyclohexane), alcohols (e.g. methanol, butanol and glycol, acetone), ami Drew (eg dimethylformamide), sulfoxides (eg dimethyl sulfoxide), animal oils, vegetable oils, fatty acids and fatty acid esters.

Solid carriers include clay, kaolin, talc, diatom, silica, calcium carbonate, montmorillonite, bentonite, feldspar, quartz and alumina.

As emulsifiers, dispersants, and surfactants, conventional ones are used. Surfactants include anionic, cationic, nonionic and protonic surfactants (eg, sodium salts of higher alcohol sulfates, stearyltrimethylammonium chloride, polyoxyethylene alkylphenylethers and lauryl betaines).

In the pesticidal composition of the present invention, the content of the compound A and the diaze is from 0.5 to 95 weight percent, preferably from 2 to 85 weight percent.

It is desirable to vary the content depending on the form of preparation. For example, in the case of powders, the dia of compound A is 1.5 to 4.0% of the mixture and the remainder is 96 to 98.5% as an adjuvant. In the case of granules and microgranules, the content of diazinon mixture of compound A is 2.5 to 6.0% and the remainder is 94 to 97.5% as an adjuvant. In the case of a hydrated powder, the content of the compound A and diazinon mixture is 25 to 45% and the remainder is 55 to 7.5% as an adjuvant. In the case of aerosols, the content of the compound A and diazinon mixture is 0.3 to 2.0% and the remainder is 98 to 99.7% as an adjuvant. In the case of flowable emulsion concentrates, the content of the diazinon mixture of compound A is 20 to 40% and the remainder is 60 to 80% as an adjuvant. In the case of microvolume formulations, the content of the compound A and diazinon mixture is 20 to 50% and the remainder is 50 to 80% as an adjuvant. In the case of an emulsifier, the compound A and diazinon mixture is 30 to 50% and the remainder is 50 to 70% as an adjuvant.

As for the ratio of compound A and diazinone, 1: 0.2-6.0 are preferable by weight.

The amount of the composition of the present invention can be changed depending on the form, the method of use, and other conditions. Generally, about 10 to 500 g, preferably 30 to 400 g (as active ingredient) per 10 a is used.

For example, powders use 40 to 120 g of active ingredient per 10a. Emulsifiers and hydrating ingredients are used in the range of 40 to 250 g of active ingredient per 10a. However, in special cases the compositions can be used below or above the ranges described above.

The composition may be used alone or in combination with fungicides, herbicides, plant growth regulators, acaricides, agricultural and horticultural fungicides, soil stabilizers, soil improvers, nematicides and fertilizers and other pesticides.

The present invention will be described in detail with the following preparation examples. However, the adjuvant and their mixing ratio can be changed in a wide range without limiting as follows and all parts are by weight.

Preparation Example 1

Oil painting concentrate

45 parts of a liquid mixture of xylene and methylnaphthalene (1: 1) are added to 20 parts of A. and 20 parts of diazinon to obtain a solution. The solution is then mixed with 15 parts of a mixture of alkylphenol ethylene oxide concentrate and calcium alkylbenzenesulfonate (8: 2) to give an emulsion concentrate.

The emulsion concentrate is diluted with water and sprayed at a concentration of 1/1000 to 1/2000.

Preparation Example 2

[Hydrating Powder]

10 parts of compound A and 30 parts of diazinone are mixed with 52.5 parts of synthetic silicon dioxide powder. The mixture is mixed with 7.5 parts of a mixture of sodium laurate and sodium dinaphthylmethanesulfonate (1: 1) and ground to obtain a powdery preparation. The resulting hydrating ingredient is diluted with water and sprayed at a concentration of 1/1000 to 2/1000.

Preparation Example 3

[Powder]

95 parts of talc and calcium carbonate mixture (1: 1) are added to 1 part of a compound and 2 parts of diazinon, and the mixture is ground to obtain a uniform dispersion. Thereafter, 2 parts of synthetic silicon dioxide powder is added to the material to obtain a powder.

The powder can be used as it is.

Preparation Example 4

[Aerosol]

1 part of compound A and 4 parts of diazinone are dissolved in 45 parts of methylnaphthalene and cyclohexane mixture (1: 1). The mixture is mixed again with 50 parts of furion to give a uniform solution. Aerosols can be used directly for spraying.

The effects of the present invention can be seen in the following examples. Housefly, green rice leafhopper, grass leaf roller, rice plant skipper and the like were used in the experiment.

However, the pesticide composition of the present invention can be used to control the following pests, not limited to the above-described pests only. German wheel, red moss, tropical mosquito, wheat beetle, rice beetle, rice beetle, weevil, rice water weevil, diamond backmoth, tobacco cut worm, Cabbage Giant Beetle, Cabbage Worm, Peach Aphid, Cabbage Powdered Aphid, Triareurodes vaporariorum, White Bull Moth, Straw Moth, Tea torttirix and Lithocolletis Lingoniella (Lithocolletis) ringoniella).

The composition of the present invention has a higher insecticidal effect and has a longer lasting effect as compared to the case where the active ingredients are used, respectively.

In the field test, the composition showed excellent control effect.

Experimental Example 1

[Control test of housefly]

1 μl of acetone solution containing a diluted concentration of pesticide composition is injected into the dorsal chest of an adult housefly (female) resistant to organophosphorus pesticides using a micro application vessel. Five different concentrations are used. Each group consists of 35 adult fly flies (females) and the test is repeated twice. After 24 hours of treatment, surviving and killing numbers of houseflies are calculated.

The number of dead fly flies is plotted on an exponential graph to obtain LD-50.

The Line and Johnson's Equation [Jour. Econ. Toxicity factor is calculated according to Ent 53 (5) 887-891 (1960).

A toxicity factor of 100 or higher is synergistic, 100 is an additive action, and 100 or less is an antagonistic effect.

The results are shown in Table 1.

TABLE 1

Experimental Example 2

[Control Test of End Cicada]

Rice seedlings (Saitama Mochi No. 10) are transplanted into 1 / 10,000 artpots. Each stump consists of 5 seedlings. When the seedlings grow to 25 cm, they are treated with 1 kg / 10 pieces of powder using a bell jar branch. Immediately afterwards, 15 adult cicadas (females) are bred in a conical mesh of 12 cm in diameter and 30 cm in height. Many cicada larvae died after a period of time and were killed after 24 hours (single dose). After 3 days of treatment, the end cicada larvae were added as described above and irradiated with dead water after 24 hours (2 inoculations).

Repeat the test three times.

After a certain period of time, the KT-50 (death time 50%) is obtained by plotting on the exponential graph of the number of dead cicadas.

The results are shown in Table 2.

TABLE 2

Experimental Example 3

[Control Test of End Cicada]

A stump containing five 25 cm-sized rice seedlings (Saitama Mochi No. 10) is placed on a swivel table (16 r.pm). The emulsion concentrate is diluted with tap water and sprayed to pests within 1 m distance using a compressed spray gun (1 kg / cm ³ ) at a constant concentration. After drying in air, 15 adult females of female cones are 12cm in diameter and 30cm in height. Many cicadas larvae died after a certain period of time, and observed after 24 hours. Repeat the test three times. KT-50 is obtained by plotting the number of dead cicadas on the exponential graph after a certain time.

Toxic effect is obtained as described above. The results are shown in Table 3.

TABLE 3

Experimental Example 4

[Control test of cold moth and fledgling butterfly (packaging test)]

Field trials of wild moths and fledgling butterflies are conducted in rice fields in Saitama, Ao City. The rice paddy where the rice (Saitama Mochi No. 10) grows is divided into 6m × 10m. Spray on 3 kg / 10 are with manual mountain branch on July 30. Repeat the test twice. After 14 days of application, the number of rice damaged by the incidence moths and fluttering butterflies of 50 stumps in each rice paddy is examined.

The results are shown in Table 4.

TABLE 4

Claims (1)

The active ingredient 3-phenoxy-α-cyanobenzyl-1- (4-ethoxyphenyl) -2,2-dichlorocyclopropanecarboxylate and O, O-diethyl-O-2-isopropyl-6- A pesticide composition containing methylpyrimidin-4-yl phosphorothioate in a weight ratio of 1: 0.2 to 1: 6.0 and mixed with other adjuvants.