JPH06116109A - Diamond-back moth controlling agent - Google Patents

Abstract

PURPOSE:To provide the subject agent having high antifeedant activity along with high insecticidal activity on Diamond-back moth larvae, containing, as active ingredient, a compound selected from specific quassinoids. CONSTITUTION:This controlling agent having the above-mentioned advantages contains, as active ingredient, 0.1-99.9 (pref. 1-90) wt.% of a compound selected from a group comprising bruceoside-B of formula I, yadanzioside-B of formula II, yadanzioside-L of formula III, bruceantin of formula IV, isobruceine-B of formula V and bruceanol-A of formula VI. For the compound, a technical product itself can be used; however, the compound should be used by mixing it with a solid carrier, liquid carrier, surfactant, or other auxiliary in the form of an emulsion, hydrous agent or suspension.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compound which shows a high antifeedant activity against diamondback moth larvae and also has a high insecticidal activity.

[0002]

BACKGROUND OF THE INVENTION Bruceoside-B (Br
uceoside-B), Yadandioside-B represented by Chemical formula 2 (Yadanzioside-B), and Yadandioside-L represented by Chemical formula 3 (Yadanzioside-B).
L), Bruceantine (Chemical Formula 4)
tin), isobrucein-B (Iso
Bruseine-B) and Brucenol-A represented by Chemical Formula 6 are known compounds described in the following reports.

That is, the chemical formula 1 is described in J. Org. Che
m. , 44 2180 (1979), Chem. 2 is Che
m. Pharm. Bull. , 32 4702 (198
4) and 3 are described in Bull. Chem. Soc. Ja
p. , 58 2673 (1985), Chem. Or
g. Chem. , 40 648 (1975), Chemical formula 5 is
Tetrahedron Lett. , 26 1225
(1985), Chem. Nat. Prod. , 48
972 (1985) and the like.

[0004]

[Problems to be Solved by the Invention]
It has never been shown that the compound of Chemical formula 6 has antifeedant activity and insecticidal activity against diamondback moth.

[0005]

Means for Solving the Problems The present inventor has conducted extensive studies to develop a control agent having an excellent control effect against diamondback moth, and as a result, a certain quassinoid has been identified as a control agent for diamondback moth.
The present inventors have found that they have excellent antifeedant activity and insecticidal activity, and completed the present invention.

That is, the present invention uses the formula (1)

[0007]

[Chemical 7] , Equation (2)

[0008]

[Chemical 8] , Equation (3)

[0009]

[Chemical 9] , Formula (4)

[0010]

[Chemical 10] , Formula (5)

[0011]

[Chemical 11] And equation (6)

[0012]

[Chemical 12] A compound selected from the group consisting of [the compound (1), the compound (2), the compound (3), the compound (4), the compound (5) and the compound] It is written as (6). The present invention provides a control agent for diamondback moth (hereinafter referred to as the control agent of the present invention) containing the following as an active ingredient.

When the present compound is used as an active ingredient of the control agent of the present invention, the drug substance itself can be used, but usually, it is mixed with a fixed carrier, a liquid carrier, a surfactant or other formulation auxiliary agents to prepare an emulsion. , Wettable powder, suspension, etc.

The content of the present compound as an active ingredient in these preparations is 0.1 to 99.9% by weight, preferably 1 to 90%.

Examples of the fixed carrier include clays (kaolin clay, diatomaceous earth, synthetic hydrous silicon oxide, bentonite, fubasami clay, acid clay, etc.), talcs, ceramics, and other inorganic minerals (sericite, calcium carbonate, activated carbon). Etc.) and the like.

Examples of the liquid carrier include water, alcohols (methanol, ethanol, etc.), ketones (acetone, methyl ethyl ketone, etc.), aromatic hydrocarbons (benzene, toluene, xylene, methylnaphthalene, etc.), aliphatic carbonization. Hydrogen (hexane, cyclohexane, kerosene, light oil, etc.), esters (ethyl acetate, etc.), nitriles (acetonitrile, etc.), ethers (diisopropyl ether, etc.), acid amides (N, N-dimethylformamide, etc.), halogen Examples thereof include hydrocarbons (dichloromethane and the like), dimethyl sulfoxide, soybean oil, vegetable oils such as cottonseed oil and the like.

Examples of the surfactant include alkyl sulfates, alkyl sulfonates, alkyl aryl sulfonates, alkyl aryl ethers and their polyoxyethylenated products, polyethylene glycol ethers, polyhydric alcohol esters, sugars. Examples thereof include alcohol derivatives.

Examples of auxiliary agents for formulation such as sticking agents and dispersants include casein, gelatin, polysaccharides (starch powder, gum arabic, cellulose derivatives, etc.), lignin derivatives, bentonite, sugars, synthetic water-soluble polymers ( Polyvinyl alcohol, polyacrylic acids and the like).

Examples of the stabilizer include PAP (isopropyl acid phosphate), vegetable oil, mineral oil, the above-mentioned surfactant, fatty acid or its ester, and the like.

The preparation thus obtained is used as it is or after being diluted with water or the like. Further, it can be used simultaneously with or without being mixed with other insecticides, acaricides, fungicides, herbicides, plant growth regulators, synergists, fertilizers, soil conditioners and the like.

When the present compound is used as an active ingredient of the control agent of the present invention, its application amount varies depending on the target crop, the generation degree of diamondback moth, the formulation form, the application method, the application time, the weather conditions, etc. When the emulsion, wettable powder, suspension or the like is diluted with water and applied, the application concentration is usually 0.001 to 0.5%.

[0022]

EXAMPLES The present invention will be specifically described below with reference to formulation examples and test examples, but the present invention is not limited to the following examples. In addition, a part represents a weight part.

Formulation Example 1 10 parts of each of the present compound (1), the present compound (2), the present compound (5) or the present compound (6) was dissolved in 35 parts of xylene and 35 parts of N, N-dimethylformamide, 14 parts of polyoxyethylene styryl phenyl ether and 6 parts of calcium dodecylbenzene sulfonate were added and mixed well with stirring to obtain a 10% emulsion of each.

Formulation Example 2 20 parts of each of the present compound (3) or the present compound (4) was mixed with 4 parts of sodium lauryl sulfate, 2 parts of calcium ligninsulfonate, 20 parts of synthetic hydrous silicon oxide fine powder and 54 parts of diatomaceous earth. Add to the inside and stir mix with a juice mixer to obtain each 20% wettable powder.

Formulation Example 3 10 parts of the present compound (5) is dissolved in 70 parts of acetone, 14 parts of polyoxyethylene styryl phenyl ether and 6 parts of calcium dodecylbenzenesulfonate are added, and well mixed with stirring to obtain a 10% emulsion. .

Next, a test example will be shown.

Test Example 1 The present compounds (1) to (4) and (6) were diluted with methanol, the present compound (5) was diluted with acetone, and 20 μl of each was added to citrus leaf (cut out to a diameter of 2 cm).
Both sides were applied. After air-drying, they were placed on a filter paper moistened with 1 ml of water in a plastic petri dish (diameter 9 cm, height 2 cm). Konaga per 1 dish ( Pl
Utella xylostella ) 8 third-instar larvae were released, and two days after the treatment, the feeding inhibition degree and the mortality rate were investigated. The degree of feeding inhibition was shown as an average value of four leaves on the scale according to the feeding degree shown below. Table 1 shows the feeding inhibition degree, and Table 2 shows the mortality rate.

[0028]

[0029]

[Table 1]

[0030]

[Table 2]

[0031]

INDUSTRIAL APPLICABILITY Since the controlling agent of the present invention has an excellent controlling effect against diamondback moth, it can be used for various uses of controlling diamondback moth.

Continued Front Page (72) Yuko Yamazaki Inventor Yuko Yamazaki 4-2-1 Takashi, Takarazuka-shi, Hyogo Sumitomo Chemical Co., Ltd.

Claims (1)

[Claims] 1. Formula 1 , Formula 2 , Formula 3 , Formula 4 , Formula 5 And the formula: An agent for controlling diamondback moth, which comprises a compound selected from the group consisting of as an active ingredient.