JPS5946204B2 - insecticide composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides 02S-dimethyl N-acetyl phosphoramidothioate (hereinafter referred to as acephate) and 0,0-dimethyl S-[5-methoxy-2-oxo-2,3-dihydro- The present invention relates to an insecticide composition containing 1,3,4-)riazolyl-(3)-methyl]phosphorothiorothionate (hereinafter referred to as DMTP) as an active ingredient.

Niacefneet: DMTP Conventionally, organic phosphorus insecticides have been used in large quantities in Japan as a specific effective agent for controlling the major pests of cane and fruit trees, such as armyworm, black-spotted beetle, and mulberry mealybug.

However, depending on the compound used, the effect is not always sufficient and undesirable results have appeared in terms of crop growth, and there has been an urgent need to develop effective control agents against these major pests.

The present inventors have carried out various studies in order to develop a drug that can exhibit a high control effect against armyworms, brown leaf beetles, mulberry scale insects, etc., for which conventional organophosphorus insecticides are not sufficiently effective.

As a result, it was found that an insecticide composition containing acephate and DMTP exhibits an extremely high control effect against armyworms, brown leaf beetles, mulberry scale insects, etc., for which each active ingredient alone is not sufficiently effective. .

The pest control effect of the insecticide composition of the present invention exhibits a synergistic effect that is unimaginable from the additive effect when each active ingredient is applied alone, and is not observed when each active ingredient is applied alone. Demonstrates the effect of controlling different species.

The insecticide composition of the present invention is a mixture of acephate and DMTP, and the insecticidal effect of acephate can be synergistically increased by simply adding a small amount of DMTP to acephate.

Furthermore, if a small amount of acephate is added to DMTP and used, the insecticidal effect of DMTP can be increased synergistically.

Furthermore, the insecticide composition of the present invention is also effective against paddy rice pests such as planthoppers, leafhoppers, and cutworms; cane pests such as green caterpillars, mealybugs, cutworms, and aphids; and fruit tree pests such as cutworm moths and mites. It exhibits a high pest control effect that far exceeds the effect of applying other ingredients.

The insecticide composition of the present invention can be prepared as a powder, emulsion, or
It can be prepared into appropriate forms such as granules, wettable powders, and fine granules.

As the carrier, any solid or liquid carrier commonly used for agricultural and horticultural chemicals can be used, and the carrier is not limited to a specific carrier.

For example, solid carriers include talc, clay, kaolin, silica, diatomaceous earth, bentonite, etc.
Liquid carriers include, but are not limited to, solvents such as quidylol, methylnaphthalene, and cyclohexanone.

Furthermore, by adding auxiliary agents used in agricultural and horticultural chemicals, such as emulsifying agents, wetting agents, spreading agents, and dispersing agents, it is possible to surely improve the effectiveness.

Next, some examples of the insecticide composition of the present invention will be listed.
The present invention is not limited to the following examples.

Note that the middle part of the examples below indicates parts by weight.

Example 1 (Wettable powder) A wettable powder is obtained by uniformly mixing and pulverizing 25 parts of DMTP, 25 parts of acephate, 3 parts of sodium naphthalenesulfonate formalin condensate, 5 parts of sodium dodecylbenzenesulfonate and 42 parts of clay.

Example 2 (powder) DMTPZ part, acephate 1 part, white carbon 1 part
1 part, 20 parts of talc, and 76 parts of clay are uniformly mixed and pulverized to obtain a powder.

Example 3 (Fine Granules) A part of DMTPI, 1 part of acephate, 1 part of PVA and 97 parts of Creni are uniformly mixed and pulverized, granulated by rolling while adding water, dried and sieved to obtain a fine granule of 65 to 250 mesh.

Example 4 (Granules) After uniformly mixing 1 part of DMTP, 4 parts of acephate, 1.5 parts of dodecyl bene/sodium sulfonate, 10 parts of bentonite and 83.5 parts of clay, the mixture was kneaded with water and extruded into granules. After being granulated in a machine, it is dried, sized and sieved to obtain granules.

Next, the usefulness of the insecticide composition of the present invention will be specifically explained using test examples.

Test Example 1 Testing the control effect against the Quercus vulgare The test method was to parasitize Kapocha with about 50 instar larvae of the Quercus Quercus larvae, and immerse the Kapocha in small pieces in a chemical solution with a predetermined concentration for 10 seconds. The strips were placed in a Petri dish with a diameter of 9 crfL, and the rate of turning insects after 24 hours was determined.

The test was conducted in 1 section in triplicate, and the average supine insect rate was calculated.

The test results are shown in Table 1. PMP is a commercially available insecticide containing diethyl-8-(phthalimidomethyl)phosphorothiorothionate as an active ingredient.

Based on the data in Table 1, L is calculated by Carpenter's equation.
C6o value (50% lethal drug concentration) and LC9o (90
The expected value of %lethal drug concentration) was determined, and the synergistic dust was calculated from the comparison with the actual value.

In this case, a synergistic value of 1 indicates an additive effect, a value less than 1 indicates an antagonistic effect, a value greater than 1 indicates a synergistic effect, and a value of 2 or more indicates a synergistic effect. Indicates that the insecticidal effect is significant.

The results are shown in Table 2.

Claims (1)

[Scope of Claims] 02S-dimethyl N-acetyl phosphoroamide thiolate represented by the formula 1 and 0,O-dimethyl 5-(5-methoxy-2
-oxo-2,3-dihydro-1,3,4-triazolyl-(3)-methyl]phosphorothiolothionate as an active ingredient.