JPH0558811A - Insecticidal composition - Google Patents

Abstract

PURPOSE:To obtain an insecticidal composition showing synergistically insecticidal effects by combining an amine derivative with a methylenedioxyphenyl group- containing synergist. CONSTITUTION:(A) A compound shown by formula I (R1 is optionally substituted pyridyl, pyrazyl or thiazolyl except nonsubstituted 2-pyridyl; R2 is H, optionally substituted alkyl, cycloalkyl or alkoxy; R3 is H or optionally substituted alkyl; R4 is CN or NO2) or its salt is combined with (B) a methylenedioxyphenyl group-containing synergist such as piperonyl butoxide shown by formula II or sesamex shown by formula III in a ratio of 1 pt.-wt. component A to 1-20 pts.wt. component B to give an insecticidal composition. The composition is used by application, top dressing, underwater application, submerged application, application on soil surface, soil incorporation treatment, plant hole treatment, seedling immersion, seed disinfection, application on raising seedling box, smoking, fumigation, coating, poison bait, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel insecticidal composition having an excellent insecticidal effect, which comprises a combination of an amine derivative of the following formula [I] and a synergist having a methylenedioxyphenyl group.

[0002]

2. Description of the Related Art A large number of insecticides have been conventionally used for controlling agricultural and horticultural crops and sanitary pests, but their use is insufficient due to the insufficient control effect or the emergence of drug-resistant pests. It is difficult to say that it is a satisfactory control agent because it is limited, or it causes phytotoxicity or contamination on plants, or is highly toxic to human livestock and fish. Therefore, there has been a demand for the development of a drug that can be used safely with few such drawbacks.

[0003]

DISCLOSURE OF THE INVENTION The present inventor studied a combination with a synergist having a methylenedioxyphenyl group in examining more effective utilization of an amine derivative represented by the formula [I] described later. As a result, they found that a synergistic insecticidal effect was obtained.

[0004]

The present invention has the general formula [I]

[Chemical 2] (In the formula, R ₁ is an optionally substituted pyridyl group, pyrazyl group or thiazolyl group excluding unsubstituted 2-pyridyl group, and R ₂ is a hydrogen atom, an optionally substituted alkyl group or a cycloalkyl group. Or an alkoxy group, R ₃ represents a hydrogen atom, an optionally substituted alkyl group, and R ₄ represents a cyano group or a nitro group) or a salt thereof and a methylenedioxyphenyl group. It has been found that the insecticidal composition comprises a synergist having a novel active substance combination and exhibits an excellent insecticidal effect.

The insecticidal composition of the present invention comprising the amine derivative of the general formula [I] or a salt thereof and a synergist having a methylenedioxyphenyl group has a greater insecticidal effect than that of the amine derivative alone. It showed synergism. That is,
By applying the insecticidal composition according to the present invention, for example, planthoppers that are important pests of paddy rice, leafhoppers, rice weevil, rice leaf weevil, aphids that are important pests such as fruit tree, vegetables, diamondback moth, leaf beetle, syncytidae,
It was more effective than the amine derivative alone against sanitary insects such as house flies, mosquitoes and cockroaches, and showed a synergistic insecticidal effect.

Preferred amine derivatives of the general formula [I] used in the insecticidal composition according to the present invention are defined as follows.

[Chemical 3] In the formula, R ₁ represents a pyridyl group or a thiazolyl group substituted with a halogen atom such as a chloro atom, excluding an unsubstituted 2-pyridyl group, and R ₂ represents a hydrogen atom, a lower alkyl group, a cyclopropyl group or a lower alkoxy group. , R ₃ represents a hydrogen atom or an alkyl group, and R ₄ represents a cyano group or a nitro group.

Examples of the amine derivative of the general formula [I] used in the insecticidal composition according to the present invention include the compounds shown in Table 1 below. A method for producing the amine derivative or a salt thereof and use thereof as an insecticide are described in WO91 /
04965.

[0008]

[Table 1]

On the other hand, examples of the synergist having a methylenedioxyphenyl group used in the present invention include the compounds shown in Table 2.

[0010]

[Table 2]

The weight ratio of the active substance of each group in the active substance is generally such that the synergistic compound having a methylenedioxyphenyl group per 1 part by weight of the active substance group of the amine derivative of the general formula [I] or a salt thereof. For example, 1 to 20 parts by weight of the agent can be used. The insecticidal composition according to the present invention shows an excellent insecticidal effect, spraying, top dressing, underwater application, water surface application, soil surface application, soil admixture treatment, planting hole treatment, seedling dipping, seed disinfection, seedling box application, smoking. , Fumigation, coating, poison bait, etc. can be used.

The pesticidal composition according to the present invention exhibits a stronger pesticidal effect than the case where each active compound is applied alone, so that it has no phytotoxicity to crops and low toxicity to mixed-blooded animals and can be used safely.

The insecticidal composition of the present invention contains a compound represented by the general formula [I] and a synergist having a methylenedioxyphenyl group as active ingredients, and the active ingredient compounds are pure products. Although it can be used, it is usually in the form of general insecticides, that is, wettable powders, water solutions, powders, emulsions, oils, granules, flowables, fumigants, fumigants, aerosols, coatings, poison baits The preparations may be used in the form of an agent or the like in the form of a mixture at the same time, or the preparations separately may be mixed and used. As the additives and carriers, when the purpose is a solid agent, soybean flour, vegetable powder such as wheat flour,
Mineral powders such as diatomaceous earth, apatite, gypsum, talc, bentonite and clay, and organic and inorganic compounds such as sodium benzoate, urea and mirabilite are used.

When a liquid dosage form is intended, petroleum fractions such as vegetable oil, mineral oil, kerosene, xylene and solvent naphtha, cyclohexane, cyclohexanone, dimethylformamide, dimethyl sulfoxide, trichloroethylene, methyl isobutyl ketone, water. Is used as a solvent. In these preparations, a surfactant can be added if necessary to take a uniform and stable form. The wettable powder, emulsion, water solvent, flowable agent, etc. thus obtained are diluted with water to a predetermined concentration to give a suspension or emulsion, and the oil, powder, and granules are used as they are.
Used in the method of spraying.

[0015]

[Examples] Examples of formulations are shown below.
The surfactant and the like are not limited to these examples. Example 1 Emulsion Active compound of formula [I] 5 parts Piperonyl butoxide 10 parts Alkylphenyl polyoxyethylene 5 parts Dimethylformamide 45 parts Xylene 35 parts The above ingredients are mixed and dissolved, and diluted with water before use and sprayed as an emulsion.

Example 2 Wettable powder Active compound of formula [I] 10 parts Sesamex 20 parts Higher alcohol sulfate ester 5 parts Diatomaceous earth 60 parts Silica 5 parts Mix the above with fine powder and dilute with water before use Spray as a suspension.

Example 3 Dust formulation Active compound of formula [I] 5 parts Piperonyl butoxide 10 parts Talc 84.7 parts Silica 0.3 parts

Example 4 Granules Active compound of formula [I] 5 parts Piperonyl butoxide 10 parts Clay 63 parts Bentonite 20 parts Dioctyl sulfosuccinate sodium salt 1 part Sodium phosphate 1 part The above is applied as it is when used. To do.

Example 5 Oil agent Active compound of the formula [I] 1 part Piperonyl butoxide 5 parts Kerosene 94 parts The above components are mixed and dissolved and sprayed as they are before use.

[0020]

【The invention's effect】

Test Example 1 Test against housefly A cotton pad was put in a small petri dish having a diameter of 3 cm, and an aqueous sugar solution having a predetermined concentration of a wettable powder according to Example 2 was dropped to be used as a poison bait. This petri dish was placed in a high waist petri dish, and 10 adult houseflies were inoculated. Cover with a wire net, temperature 25
It was placed in a thermostatic chamber at a temperature of 65 ° C. and a humidity of 65%, and the insecticidal rate was investigated 2 days later. The results are shown in Table 3.

[Table 3]

Test Example 2 Test against diamondback moth A piece of cabbage leaf was immersed for 30 seconds in an aqueous solution of a drug prepared by diluting a wettable powder according to Example 2 to a predetermined concentration. After air-drying, treated leaves were placed in a petri dish and 10 second-instar larvae of diamondback moth were inoculated. The glass cover was placed and placed in a thermostatic chamber at a temperature of 25 ° C. and a humidity of 65%, and the insecticidal rate was examined 3 days later. The results are shown in Table 4.

[Table 4]

Claims (1)

[Claims] 1. A compound represented by the general formula [I]: (In the formula, R ₁ is an optionally substituted pyridyl group, pyrazyl group or thiazolyl group excluding unsubstituted 2-pyridyl group, and R ₂ is a hydrogen atom, an optionally substituted alkyl group or a cycloalkyl group. Or an alkoxy group, R ₃ represents a hydrogen atom, an optionally substituted alkyl group, and R ₄ represents a cyano group or a nitro group) or a salt thereof and a methylenedioxyphenyl group. An insecticidal composition, which comprises a synergist with the compound as an active ingredient.