JPS58131909A - Insecticide for hylemyia platura meigen - Google Patents

Abstract

PURPOSE:An insecticide for Hylemyia platura Meigen having improved controlling effect on it by using O,S-dimethyl N-acetyl-phosphoroamidothioate and O,O- diethyl O-2,4-dichlorophenylphosphorothionate at the same time. CONSTITUTION:An insecticide against Hylemyia platura Meigen, comporising O, S-dimethyl N-acetyl-phosphoroamidothioate and O,O-diethyl O-2,4-dichlorophenylphosphorothionate as active ingredients, showing extremely high insecticidal effect on Hylemyia platura Meigen, etc, which can not be fully destroyed by the use of each of the active ingredients alone. The insecticide shows extremely higher insecticidal effect not only on Hylemyia platura Meigen, etc. but also on vegetable parts and fruit pests than each of the individual components. The insecticide is also effective against soil pests and sanitary pests, can show effects by powerful contact poison, food poison, nerve poison and smoking poison, has no phytotoxicity to useful plants at all, and is usable as an economic and safe insecticide.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to O,S-dimethyl-N-acetylphosphoramidothioate (referred to as acephate) and 0.0-thief
ho-2,4-cyclophenylpho x holothione) (
The present invention relates to a seed fly control agent characterized by containing ECP) as an active ingredient.

Conventionally, organophosphorus insecticides have been used in large quantities in Japan as an important specific insecticide for controlling planthoppers, leafhoppers, and the common insect pest, which are major pests in rice fields. However, the effect is not necessarily sufficient against the seed fly, which is a major pest of Japanese mustard.

The present inventors conducted various studies to develop a drug that can exhibit a high control effect against seed flies and the like, for which conventional organophosphorus insecticides are not sufficiently effective.

As a result, it has been found that by using acephate and ECP in combination, extremely high control effects can be exerted against seed flies, which were not sufficiently effective with each agent alone.

The control effect of the seed fly control agent of the present invention exhibits a synergistic effect that is unexpectedly large from the additive effect when each active ingredient is applied alone, and controls foreign crops that cannot be seen when applying each active ingredient alone. be effective.

In addition to the above, the seed fly control agent of the present invention also has far superior effects on cane vegetable pests such as green caterpillars, mealybugs, cutworms, and aphids, as well as fruit tree pests such as mulberry scale, leaf beetles, and cutworms. Demonstrates a high rotational effect. It is also effective as a control agent for not only plant pests but also soil pests and sanitary pests, and can be effective as a powerful contact poison, food poison, neurotoxin, and fumigation poison. In addition, by mixing them, the practical concentration of each agent can be further lowered, and it is an extremely excellent agent that does not cause any phytotoxicity to useful plants, and can be used economically and safely as an insecticide. be.

The insecticide composition of the present invention can be formulated into an appropriate form such as a powder, an emulsion, a granule, a wettable powder, or a fine granule using a known formulation. As the carrier, any solid or liquid carrier commonly used for agricultural III'A drugs can be used, and the carrier is not limited to a specific carrier. For example, solid carriers include talc, clay, kaolin, silica, diatomaceous earth,
Examples of the liquid carrier include, but are not limited to, bentonite and solvents such as quidylol, methylnaphthalene, and cyclohexanone. Furthermore, by adding auxiliary agents used in common agricultural chemicals, such as emulsifiers, wetting agents, spreading agents, dispersants, etc., it is expected that the effects will be surely improved.

Next, some examples of the insecticide composition of the present invention will be given, but the present invention is not limited to the following examples. In addition,
In the following examples, all parts refer to 1 part by weight.

Example I 25 m of ECP, 25 m of acephate, 3 parts of sodium naphthalene sulfonate formalin, 5 parts of sodium dodecylbenzenesulfonate and 42 parts of clay are uniformly mixed and pulverized to obtain an irrigation agent.

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

Example 3 ECP I N, 1 part of acephate, 1 part of PvA and 97 parts of clay were uniformly mixed and pulverized, granulated by rolling while adding water, dried and sieved to obtain fine granules of 65 to 250 mesh.

Example 4 After uniformly mixing 1 part of ECP, 4 parts of acephate, 1.5 parts of sodium dodecylbenzenesulfonate, 10 parts of bentonite and 83.5 parts of clay, the mixture was kneaded with water and granulated using an extrusion granulator. After drying and sieving, granules are obtained.

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

Test example 1 Control effect test against seed flies - Width 1 in the field
Dig 05I rows, apply fish meal, leave for 22 days,
Encouraged seed fly spawning. The fish meal was covered with soil, a predetermined amount of the chemical was sprinkled within the cropping rows, green beans (variety: Shin-Edo) were sown, and the soil was covered.

Seventeen days after treatment, the number of germination and number of damage (by degree) were investigated. The cultivation was carried out in three consecutive rows in 2 m plots, and the total was investigated, and the control value (4) was determined from the damage index shown below. The results are shown in Table 1.

Coefficient damage level: None (0) No damage, little (1) Very slight damage, no effect on subsequent growth (3) Damage, but no effect on subsequent growth (5) Damage, ＼extensive growth Slightly affected, but recovery is possible (8) Severe damage, growth is extremely poor, recovery is extremely difficult (10) Severe damage, failure to germinate or withering after germination Conditioning number of breaks x number of maintenance steps Table 1 Dimethoate FiO,O -dimethyl 5-(N-methylcarbamoylmethyl)phosphorothiolothionate.

Claims (1)

[Claims] A seed fly control agent characterized by containing 0,S-dimethyl N-acetyl phosphoroamide thioate and 0.0-diethyl O-2,4-dichlorophenyl phosphorothioate as active ingredients.