JPH0826916A - Insecticidal composition - Google Patents

Abstract

PURPOSE:To obtain a composition having highly insecticidal power and synergistic effect. CONSTITUTION:The characteristic of this insecticidal composition comprises alpha-cyano-3-phenoxybenzyl=2,2,3,3-tetramethylcyclopropanecarboxylate and 2-tert- butyl-5-(4-tert-butylbenzylthio)-4-chloropyridazin-3(2H)-one as active ingredients.

Description

Detailed Description of the Invention

[0001]

The present invention relates to α-cyano-3-phenoxybenzyl = 2,2,3,3-tetramethylcyclopropanecarboxylate (hereinafter referred to as compound A) and 2-tert-butyl-5-. It relates to an insecticidal composition comprising (4-tert-butylbenzylthio) -4-chloropyridazin-3 (2H) -one (hereinafter referred to as compound B) as an active ingredient.

[0002]

2. Description of the Related Art The development of pesticides for controlling various pests such as agricultural and horticultural pests, forest pests, livestock pests and sanitary pests has been widely promoted, and a wide variety of drugs are practically used. Have been used for. However, many pests rapidly develop resistance to various drugs and significantly reduce the effects of various drugs. On the other hand, in recent years, it has become extremely difficult to develop a drug having a novel action effective against pests that are resistant to various drugs. As a result, there has been a strong demand for new control methods for controlling these difficult-to-control pests using existing chemicals.

[0003]

In view of the above situation, the present inventor has studied various control methods by mixing existing agents that produce a more excellent synergistic effect, and as a result, mixed a pyrethroid agent and an insecticide. The present invention has been completed by finding that the use produces a high synergistic effect and exhibits a high control effect against pests including resistant pests.

That is, the present invention relates to compound A and compound B.
The present invention provides an insecticide composition characterized by containing as an active ingredient.

Of the active ingredient compounds according to the present invention, compound A has stereoisomers, but the more active (S) -α-cyano-3-phenoxybenzyl = 2.
Higher activity can also be expected by using 2,3,3-tetramethylcyclopropanecarboxylate or a mixture having an increased content of the isomer.

In the active ingredient compounds according to the present invention, the compound A is called fenpropatorin and the compound B is called pyridaben. Compound A is a compound disclosed in JP-A-48-10225, and compound B is a compound disclosed in JP-A-60-4173. The compound A belongs to a pyrethroid compound and originally shows high insecticidal activity against various pests. Compound B is an insecticidal / miticidal / bactericidal agent belonging to the pyridazinone derivative. In recent years, pests having acquired extremely high resistance to pyrethroid compounds have appeared, and pyrethroid compounds have no effect at all. Therefore, using pests resistant to pyrethroids, the effect of the combined use of both compounds was examined, and as shown in the test examples below, it was found that the active compounds each show a synergistic effect that is greater than the sum of the effects of the individual compounds. did. As a result, the control method of the present invention can always produce a high control effect without depending on the resistance level of the target pest.

The composition of the present invention can be applied as a pest control agent for a wide range of agricultural and horticultural crops and trees. Pests that can be controlled by using the composition of the present invention include not only insects but also mites, and specific examples thereof include hemiptera, total orders, lepidoptera, and other harmful insects and mites. Is mentioned.

Examples of the hemiptera pest include aphids such as the green peach aphid ( Myzus persicae ) and the cotton aphid ( Aphis gossypii ), and whiteflies such as Bemisia tabaci and Trialearodes vaporariorum .

Examples of pests of the order Thysanoptera include thrips such as Thrips palmi ( Scirtothrips dorsalis ) and Thrips palmi .

Examples of lepidopteran pests include diamondback moth ( Plutella xylostella )
Hirozukoga such as smaller tea tortrix (Adoxophyes sp.) Apple Coca summer fruit tortrix (Adoxophyes orana) spruce budworm such oranges leafminer, such as (Phyllocnistics citrella)
Such as, for example, Hamoguriga.

[0011] As Acarina pests, for example, two-spotted spider mite (Tetranychus urticae) kanzawai (Tetranychus kanzawai) citrus red mite (Panonychus citri) Ringohadani (Panonychus ulmi), and the like spider mites such.

Among the above-mentioned pests, the control method of the present invention is more preferable in controlling whiteflies.
Shows a high synergistic effect in controlling whiteflies,
It is useful.

The composition of the present invention can be used as it is as a mixture of the compound A and the compound B, but generally, the active compound of the present invention is held in various inert liquids, solids or gaseous carriers, If necessary, an auxiliary agent such as a surfactant, a dispersant, a fixing agent, a stabilizer, a propellant, etc. may be added to prepare a powder, granules, emulsion, oil, wettable powder, sol, flowable agent, aerosol. , Coating agents, fumigants, fumigants, UL
It is convenient to use it in the form of formulation such as V agent.

Examples of the liquid carrier include water, alcohols (methanol, ethanol, etc.), ketones (acetone, methyl ethyl ketone, etc.), aromatic hydrocarbons (benzene, toluene, xylene, ethylbenzene, methylnaphthalene, etc.), Aliphatic hydrocarbons (hexane, cyclohexane, kerosene, gas oil, etc.), esters (ethyl acetate, butyl acetate, etc.), nitriles (acetonitrile,
Isobutyronitrile etc.), ethers (diisopropyl ether, dioxane etc.), acid amides (N, N-dimethylformamide, N, N-dimethylacetamide etc.), halogenated hydrocarbons (dichloromethane, trichloroethane, carbon tetrachloride) Etc.), dimethyl sulfoxide, soybean oil, vegetable oil such as cottonseed oil, and the like.

Examples of the solid carrier include clays (kaolin clay, diatomaceous earth, synthetic hydrous silicon oxide, bentonite, fubasami clay, acid clay, etc.), talc, ceramics, and other inorganic minerals (sericite, quartz, sulfur, activated carbon). , Calcium carbonate, hydrated silica, etc.) and chemical fertilizers (ammonium sulphate, ammonium phosphide, ammonium nitrate, urea, ammonium chloride, etc.), etc.

Examples of the gaseous carrier, that is, the propellant include CFC gas, butane gas, LPG (liquefied petroleum gas), dimethyl ether, carbon dioxide gas and the like.

As the surfactant, for example, alkyl sulfate ester salts, alkyl sulfonates, alkyl aryl sulfonates, alkyl aryl ethers and polyoxyethylene compounds thereof, polyethylene glycol ethers, polyhydric alcohol esters, sugar alcohols. Examples thereof include derivatives.

Examples of auxiliary agents for formulation such as sticking agents and dispersants are casein, gelatin, polysaccharides (starch powder,
Gum arabic, cellulose derivative, alginic acid, etc.),
Examples include lignin derivatives, bentonite, saccharides, synthetic water-soluble polymers (polyvinyl alcohol, polyvinylpyrrolidone, polyacrylic acids, etc.), and examples of stabilizers include PAP (isopropyl acid phosphate) and BHT.
(2,6-tert-butyl-4-methylphenol), B
HA (2-tert-butyl-4-methoxyphenol and 3
-Tert-butyl-4-methoxyphenol), vegetable oils, mineral oils, surfactants, fatty acids or esters thereof, and the like.

In these preparations, the mixing weight ratio of compound A and compound B as an active ingredient is usually 10: 1 to 1:10.
The total amount of all active ingredients in the preparation is usually 0.1% by weight.
1 to 95%.

The effective application amount of the composition of the present invention varies depending on the conditions such as its formulation form, application time, application place, application method, kind of pest, degree of damage, etc. Can be about 0.1 to 1000 g, preferably 5 to 500 g.

The composition of the present invention can be applied to the pest or a place where the pest inhabits, for example, by direct spraying, spraying, dusting, dusting, or steaming. Further, the composition of the present invention, it is possible to further blend other insecticides, fungicides, herbicides, plant growth regulators, synergists, fertilizers, soil improvers, animal feeds, or the like, or blended. It is also possible to use them together at the same time.

[0022]

EXAMPLES Next, the composition of the present invention will be described in more detail with reference to formulation examples and test examples. However, the present invention is not limited to these examples. In the formulation examples, “part” means “part by weight”.

Formulation Example 1 : Dust: 3 parts of compound A, 2 parts of compound B, 45 parts of talc and 50 parts of clay are uniformly mixed and pulverized to obtain a powder. At the time of use, 1 to 5 kg per 10 ares of the above-mentioned dust can be directly sprayed on the plant by a dusting machine.

Formulation Example 2 : Emulsion 5 parts of compound A, 5 parts of compound B, 8 parts of polyoxyethylene alkylaryl ether, 2 parts of sodium alkylaryl sulfonate and 80 parts of xylol are uniformly mixed to obtain an emulsion. When using the above emulsion,
100-600 per 10 are by diluting 5000 times
L can be sprayed.

Formulation Example 3 : Wettable powder 5 parts of compound A, 10 parts of compound B, 3 parts of sodium alkylbenzene sulfonate, 3 parts of sodium lignin sulfonate and 79 parts of diatomaceous earth are uniformly mixed and pulverized with a jet air mixer to obtain a wettable powder. To get In use, the wettable powder can be diluted 500 to 5000 times and sprayed at 100 to 6000 liters per 10 are.

Formulation Example 4 : Flowable Agent 5 parts of polyoxyethylene styryl phenyl ether sulfate salt, 20 parts of 1% xanthan gum aqueous solution, 3 parts of smectite mineral substance and 62 parts of water are uniformly dissolved to obtain 5 parts of compound A and 5 parts of compound B. After adding well and stirring well, a wet mill is carried out with a sand mill to obtain a flowable agent. In use, the flowable agent can be diluted 500 to 5000 times and sprayed at 100 to 6000 liters per 10 are.

FORMULATION EXAMPLE 5 : Heating Smoke Agent Compound A (50 mg) and compound B (50 mg) were dissolved in an appropriate amount of acetone, and the mixture was 4 cm × 4 cm, thickness 1.2 c.
A heated smoking agent is obtained by impregnating a ceramic plate of m.

Next, it will be shown by test examples that the method for controlling pests of the present invention is useful.

Test Example 1 : Insecticidal test against pyrethroid-resistant whitefly White Tobacco Compound A (Sumitomo Chemical Co., Ltd .: Roddy 10EC) formulated as an emulsion and Compound B (Nissan Chemical Co., Ltd.) formulated as a flowable agent: Sunmite 20
FL) was diluted with water, and the diluted solution was mixed to give a predetermined amount of active ingredient to obtain a reagent. Add the above reagent to cabbage (4-5 leaf stage) planted in polyethylene cup.
0 ml was sprayed. After air-drying, the leaves were cut off and placed in a plastic petri dish (φ 9 cm, depth 2 cm) one by one, and then 50 to 100 adult whitefly white tabules were released per petri dish. The petri dish was kept in a room at 25 ° C., and life or death was determined 24 hours later (1 section, 3 repetitions). Table 1 shows the results. The theoretical value, mortality rate (%) and synergistic index (%) were calculated by the following formulas.

[0030]

[Equation 1] theoretical value insecticidal rate (%) = a + {(100-
a) × b} / 100 Synergistic effect index (%) = {mortality (%) / theoretical value insecticidal rate (%)} × 100 where a is the mortality of compound A (%), and b is the compound The mortality rate (%) of B is shown.

[0031]

[Table 1] The composition of the present invention, as is clear from the above test examples,
A high insecticidal effect is exhibited even when the compound A and the compound B alone cannot provide a sufficient effect. That is, although the effect at 800 ppm of compound A or 400 ppm of compound B is not always sufficient,
The use of 200 ppm in combination with 400 ppm of compound B gives very satisfactory results.

[0032]

The composition of the present invention exhibits a high insecticidal effect due to its excellent synergistic effect.

Claims (1)

[Claims] 1. α-Cyano-3-phenoxybenzyl =
2,2,3,3-tetramethylcyclopropanecarboxylate and 2-tert-butyl-5- (4-tert
-Butylbenzylthio) -4-chloropyridazine-3
An insecticidal composition comprising (2H) -one as an active ingredient.