JPH04360804A - Insecticidal and fungicidal composition for agricultural and horticultural use - Google Patents

Abstract

PURPOSE:To obtain an insecticidal and fungicidal composition for agricultural and horticultural use, exhibiting synergistic action to increase the effect compared with the separate use of the components, free from phytotoxicity to crops and having low toxicity to warm-blooded animals by using a specific amine derivative in combination with triflumizole. CONSTITUTION:The objective insecticidal and fungicidal composition for agricultural and horticultural use exhibiting synergistic insecticidal and fungicidal actions to major blights of paddy rice, fruit trees, vegetables, barley, etc., such as planthopper, leafhopper, aphid, diamondback moth, downy mildew and scab can be produced by compounding (A) a compound of formula [R1 is (substituted) pyridyl, pyrazyl or thiazolyl except for unsubstituted 2-pyridyl; X is (substituted) alkylene or alkylidene; R2 and R3 are H, (substituted) alkyl or cycloalkyl; R2 may be alkenyl, alkynyl or YR5; Y is O or CO; R5 is (substituted) alkyl or aryl; R4 is CN or NO2] or its salt and (B) triflumizole at a weight ratio (A:B) of 1:(1-20).

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel insecticidal and fungicidal composition for agricultural and horticultural use, which has an excellent insecticidal and fungicidal effect and is composed of a combination of an amine derivative of the formula [I] below and triflumizole.

0002

[Prior Art] In the cultivation of agricultural and horticultural crops, a large number of pesticides are used to control crop pests and diseases. Many of them are not necessarily satisfactory pesticidal agents because their use is limited, they cause phytotoxicity or contamination of plants, or they are highly toxic to animals, animals, and fish. Therefore, there is a strong demand for the development of drugs that are free from such drawbacks and can be used safely.

0003

[Problems to be Solved by the Invention] While considering the more effective use of the amine derivative represented by the formula [I] below, the present inventors investigated the combination with triflumizole and found that synergistic It has been found that a significant insecticidal and bactericidal effect can be obtained.

0004

[Means for Solving the Problems] The present invention provides general formula [I]

[Formula 2] {wherein R1 is an optionally substituted pyridyl group, pyrazyl group, or thiazolyl group, excluding an unsubstituted 2-pyridyl group, and X is an optionally substituted alkylene group or alkylidene group, R2 is a hydrogen atom, an optionally substituted alkyl group, alkenyl group, alkynyl group, cycloalkyl group, cycloalkenyl group, or aryl group, or Y-R5, Y is an oxygen atom, -CO-, R5 is a substituted R3 represents a hydrogen atom, an optionally substituted alkyl group or cycloalkyl group, and R4 represents a cyano group or a nitro group. } or a salt thereof and triflumizole, an agricultural and horticultural insecticidal and bactericidal composition,
It has been found that the new active substance combination exhibits excellent insecticidal and fungicidal effects.

The insecticidal and fungicidal compositions of the present invention, which contain the amine derivative of formula [I] or its salt and triflumizole, have greater insecticidal and fungicidal effects than those of the active compound alone, and have excellent synergistic effects. It showed force action. That is, by applying the insecticidal and fungicidal composition according to the present invention,
For example, important pests of paddy rice such as planthoppers, leafhoppers, and blast disease; important pests of fruit trees and vegetables such as aphids, diamondback moths, leaf beetles, downy mildew, and scab; important pests of wheat such as aphids and powdery mildew. The effect was greater than that of each active compound alone, and showed a synergistic insecticidal and fungicidal effect.

[0006] The enzyme cytochrome P-450, which exists in the microsomal fraction within insect cells, is known to oxidatively detoxify drugs that enter the body (Shoji Ike et al., Insect Physiology, Biochemistry, Asakura Shoten; 230, 1986). Triflumizole [which inhibits this cytochrome P-450]
Nakayama et al., Journal of the Japanese Society of Pesticides 14(1), 23-37, 19
89)] is thought to exert a synergistic effect by acting on the metabolism of the amine derivative of general formula [I] in the insect body.

Preferred amine derivatives of the general formula [I] used in the active substance combinations according to the invention are defined as follows.

[Formula 3] In the formula, R1 is a halogen atom such as a chlor atom, a pyridyl group substituted with a cyano group or a lower haloalkyl group, or a pyrazyl substituted with a halogen atom such as a chloro atom, excluding an unsubstituted 2-pyridyl group. or a thiazolyl group substituted with one or two selected from a halogen atom such as a chlorine atom and a methyl group, X is a methylene group, and R2 is an alkyl substituted with a hydrogen atom, a lower alkyl group, or a cyano group. group, allyl group, propargyl group, cyclopropyl group, lower alkoxy group, methoxymethyl group, methylthiomethyl group, benzyl group optionally substituted with chlorine atom, pyridylmethyl group substituted with chlorine atom, R3 is a hydrogen atom, a lower alkyl group optionally substituted with a halogen atom such as a chlorine atom or a fluorine atom, or a cyclopropyl group, and R4 is a cyano group. Or represents a nitro group.

Examples of amine derivatives of general formula [I] used in the active substance combination according to the invention include the following
Examples include the compounds shown in the table. The following amine derivatives or their salt production methods and their use as insecticides are described in WO
No. 91/04965.

[0009]

[Table 101]

0010

[Table 102]

The weight ratio of the active compounds of each group in the active substance is generally 1 to 20 parts by weight of triflumizole per part by weight of the active compound of the active substance group of the amine derivative of general formula [I] or its salt. Part can be used.

The active compound combination according to the invention exhibits an excellent insecticidal and fungicidal effect and can be used in foliage spraying, top dressing, underwater application, water surface application, soil surface application, soil mixing treatment, planting hole treatment, seedling soaking, seed disinfection, seedling raising. It can be used by box application smoke, fumigation, etc. The active compound combination according to the present invention exhibits a stronger insecticidal and fungicidal effect than when each active compound is applied alone, so it can be used safely without causing chemical damage to crops and with low toxicity to warm-blooded animals. The insecticidal and fungicidal composition of the present invention has the general formula [
It contains the compound represented by [I] and triflumizole as active ingredients, and although it can be used as a pure active ingredient compound, it is usually used in the form that general agricultural chemicals can take, i.e., hydrating powders, hydrating powders, etc. They may be used in the form of solvents, powders, emulsions, granules, flowables, fumigants, fumigants, etc., or may be prepared separately and mixed together. As additives and carriers, for solidifying agents, vegetable powders such as soybean flour and wheat flour, fine mineral powders such as diatomaceous earth, apatite, gypsum, talc, bentonite, and clay, sodium benzoate, and urea are used. Organic and inorganic compounds such as mirabilite and the like are used. For liquid formulations, vegetable oil, mineral oil, kerosene, petroleum distillates such as xylene and solvent naphtha, cyclohexane, cyclohexanone, dimethylformamide, dimethyl sulfoxide, trichloroethylene, methyl isobutyl ketone,
Use water etc. as a solvent. In these preparations, a surfactant may be added if necessary in order to obtain a uniform and stable form. The wettable powders, emulsions, aqueous solutions, and flowables obtained in this way can be diluted with water to a predetermined concentration to form a suspension or emulsion, and the powders and granules can be used as they are by spraying them on plants. be done.

[0013]

[Example] Next, examples of formulations will be shown.
Surfactants and the like are not limited to these examples. Example 1 Wettable powder active compound of formula [I]
5 parts triflumizole
15 parts Higher alcohol sulfate ester
5 parts diatomaceous earth
70 parts silica
5
1 part or more is mixed together and ground into a fine powder, and before use, it is diluted with water and sprayed as a suspension.

[Reference example] Next, a reference example of the formulation is shown.
Surfactants and the like are not limited to these reference examples. Reference Example 1 Wettable powder active compound of formula [I]
20 parts Higher alcohol sulfate ester
5 parts diatomaceous earth
70 parts silica

Mix 5 or more parts, grind into a fine powder, dilute with water and spray as a suspension before use. Reference Example 2 Active compound of emulsion formula [I]
15 parts alkylphenyl polyoxyethylene
5 parts dimethylformamide
50 parts xylene
Mix and dissolve 30 parts or more,
Before use, dilute with water and spray as an emulsion.

[0014]

【Effect of the invention】

Test Example 1 Test against the brown planthopper Rice seedlings 7 days after germination were diluted with water to a predetermined concentration according to the hydrating agent shown in Example 1 of the drug and the formulation of Reference Example 1 or 2. It was immersed in the chemical solution of the composition for 30 seconds. After air-drying, the treated seedlings were placed in a test tube and 10 3rd instar larvae of the Japanese brown planthopper were inoculated. The container was covered with gauze and placed in a constant temperature room at a temperature of 25° C. and a humidity of 65%, and the insecticidal rate was examined after 7 days. The results are shown in Table 2.

[0015]

[Table 2]

Test Example 2 Test against wheat powdery mildew Wheat seedlings (variety "Norin 61") grown in unglazed pots
Example 1 of the composition of the present invention at 1.0-1.2 leaf stage)
A chemical solution diluted with water to a predetermined concentration according to the formulation of the wettable powder shown in Reference Example 1 or 2 was sprayed and kept in a greenhouse for 7 days.
graminis f. sp. tritici)
Shake off the conidia, inoculate, and inoculate in a greenhouse at 22-25℃ for 7 days.
The control effect was investigated after growing for several days. The control effect was calculated by investigating the degree of disease onset in the chemically treated plants, based on the degree of disease onset in the untreated control plot, and expressed as control value (%). The results are shown in Table 3.

[0017]

[Table 3]

Claims (1)

[Claims] [Claim 1] [Formula 1] {wherein R1 is an optionally substituted pyridyl group, pyrazyl group or thiazolyl group excluding an unsubstituted 2-pyridyl group, and X is an optionally substituted alkylene group or alkylidene group, R2 is a hydrogen atom, an optionally substituted alkyl group, alkenyl group, alkynyl group, cycloalkyl group, cycloalkenyl group or aryl group, or Y-R5, Y is an oxygen atom, -CO- , R5 represents an optionally substituted alkyl group or aryl group, R3 represents a hydrogen atom, an optionally substituted alkyl group or a cycloalkyl group, and R4 represents a cyano group or a nitro group. } or a salt thereof and triflumizole.