JPS60248601A - Insecticidal composition - Google Patents

Abstract

PURPOSE:The titled composition that is obtained by adding a compound having the knock-down effect and another compound having lethal effect to an organophosphorus compound or carbamate to show powerful insecticidal effect upon undesirable insects resistant to normal insecticides. CONSTITUTION:The objective composition contains, in addition to (A) an organophosphorus compound as an insecticidal ingredient, (B) a pyrethroid with knock- down effect and (C) another pyrethroid with lethal effect. Component A is, e.g., O,S-dimethyl N-acetylphosphoroamidethioate, component B is, e.g., (RS)-3-allyl- 2-methyl-4-oxocyclopent-2-enyl (1R)cis,trans-chrysanthemate and component C, 5-benzyl-3-furylmethyl (1R)trans-chrysanthemate. It has excellent rapid, lethal and residual effects in every respect.

Description

Detailed Description of the Invention In recent years, in the fields of pesticides for agriculture, epidemic prevention, and other environmental management, when organophosphorus compounds or carbamate compounds are used alone as insecticides, they have been found to be fast-acting and lethal. In terms of effectiveness, almost no effect can be expected.
So-called resistant pests have emerged and become a problem. In this way, insect pests that have a very strong resistance to insecticides have recently been overcome by combining organophosphorus compounds or carbamate compounds with pyrethroid compounds that have a different mechanism of action. However, insecticides that are fast-acting or highly lethal against these resistant pests have been developed, and some of them have already been put on the market and are showing excellent control effects. By the way, most of these are two-component formulations containing one type of organophosphorus insecticide or one type of carbamate type insecticide and one type of pyrethroid compound, and so far, they are considered to be somewhat effective. It will be done. However, considering the fact that resistance tends to develop year by year, and considering the environmental, practical, and especially economic aspects, it is of course effective, but at the same time, it is possible to prevent these resistant pests with as little amount of chemicals as possible. It is desirable to control. In general, pyrethroid compounds are broadly classified into those with fast-acting properties that have a large knockdown effect, and those with large lethal effects and residual effects, but they are considerably more expensive than organic phosphorus-based and carbamate-based compounds. Therefore, insecticidal compositions obtained by blending only two or more types of pyrethroid compounds with a large knockdown effect and pyrethroid compounds with high lethal efficacy and residual efficacy (for example, Japanese Patent Application Laid-Open No. 1983-1982)
150607) is expected to improve the insecticidal effect against resistant pests, the result is a very expensive formulation.

As a result of intensive studies on the formulation of insecticidal active ingredients, the present inventors determined the formulation ratio of each insecticidal active ingredient in an insecticidal composition and the most economically effective combination for each combination, as shown in Examples 1 to 5. As a result of examining the immediate effect, lethal efficacy, and residual effect of the expected combination using pests with strong resistance, we were able to confirm the effectiveness of the three-part combination as in the present invention. , we have completed the present invention.

In other words, it was not possible to obtain satisfactory rapid efficacy against resistant insect pests by simply blending pyrethroid compounds with high lethal efficacy against organophosphorus compounds and carbamate compounds (see the table in each example). No inside.

4.11.18, 25.32). Similarly, simply adding a pyrethroid compound, which has a knockdown effect, will improve the quick effect, but it will cause lethality and
Practically satisfactory effects cannot be expected in terms of residual effect (No. 3゜10.17, 24.3 in the table of each example)
1). However, by adding a small amount of a pyrethroid compound, which is characterized by a lethal effect, we were able to obtain a formulation with significantly improved lethality and residual efficacy (No. 1.8, 15.22
．． 29). In addition, the amount blended at this time is -1 in such an amount that the blended pyrethroid compound alone would not have a significant effect, especially a lethal effect in this case (No. in the table of each example).

6.13.20. ’27.34).

From the above results, it was found that a three-compound insecticidal composition containing an organophosphorus compound or a carbamate compound according to the present invention, a pyrethroid compound characterized by a knockdown effect, and a pyrethroid compound characterized by a lethal effect. are each compound alone or a combination of two types of each compound, and insecticidal efficacy (immediate effect, lethal effect, residual effect)
When compared and examined from the aspects of , safety, and economic efficiency, the three-compound combination according to the present invention is superior in all aspects,
It holds great promise as an insecticidal composition for the emergence of insect pests with strong resistance to insecticides, which are increasing in the future.

The dosage forms of the insecticidal composition that can be formulated according to the present invention include emulsions, oils, powders, granules, wettable powders, aqueous solutions, aqueous solubilized emulsions, aqueous suspensions, and aerosols. ,
The present invention is not limited to these dosage forms.

Examples of insecticidal active ingredients that can be used in the present invention are listed below, but the invention is not limited thereto.

Insecticidal active ingredient organophosphorus compound that can be used in the present invention: 0. S-dimethyl N-acetylphosphoroamidothioate 0-3.5.6-)dichloro-2-pyridyl 0.0
-Diethyl phosphorothioate O-3,5,6-)lichloro-2-pyridyl 0.0
-Dimethyl phosphorothioate・〇-(4-cyanophenyl)0.0-Dimethyl phosphorothioate・0. O-diethyl O-2-isopropyl-6-methylpyrimidin-4-ylphosphorothioate 2,2-dichlorovinyl dimethyl phosphate S-(2-ethylsulfinylisopropyl)0. O
-dimethyl phosphorothioate・0.0-dimethyl 0-4-nitro-m-tolyl phosphorothioate・0,0-dimethyl 0-4-methylthio-m=tolyl phosphorothioate・S-1,2 -bis(ethoxycarbonyl)ethyl 0
．． 0-dimethyl phosphorodithioate/S-α-ethoxycarbonylbenzyl 0.0-dimethyl phosphorodithioate/O-2,4-dichlorophenyl 0-ethyl-8-propyl phosphorodithioate/0.0-diethyl 0 - (2,3-dihydro-3-
Oxo-2-phenyl-6-pyridazinyl) phosphorothioate ・o, o, o', o'-tetramethyl 0゜0'-thiodiP-phenylene bis(phosphorothioate) ・ (Z)-2- Chloro-1-(2,4,5-trichlorophenyl)vinyl dimethyl phosphate 0. -4-bromo-2,5-dichlorophenyl 0,
0-Dimethyl phosphorothioate (E)-0-2-isopropoxycarbonyl-1-
Carbamate compounds such as methylvinyl 0-methyl N-ethylphosphoroamidothioate, 2,2-dimethyl-1,3-benzodioxol-4-
Methyl carbamate/0-cef-butylphenyl Methyl carbamate/6-chloro-3,4-xylyl Methyl carbamate/1-naphthyl Methyl carbamate/0-chlorophenyl Methyl carbamate/0-cumenyl Methyl carbamate/S -Methyl N-(methylcarbamoyloxy)thioacetimideto/3,4-xylyl Methyl carbamate/m-tolyl Methyl carbamate/Methyl (3,4-dichlorophenyl) carbamate/m-tert-butylphenyl Methyl carbamate
A pyrethroid compound characterized by a non-condensing effect. (R3)-3-allyl-2-methyl-4-oxocyclobent-2-enyl (IR3) cis, trans-chrysanthemate. (R3)-3-allyl -2-Methyl-4=oxocyclobent-2-enyl (IR) cis, trans-chrysanthemate (R3) or (R) 3-allyl-
2-Methyl-4-oxocyclobent-2-enyl (I
R)) Rhansu chrysanthemate 5-(2-propynyl)-2-furylmethyl (IR3
) cis, trans-chrysanthemate 5-benzyl-3-furylmethyl 3-(2-oxo-tetrahytrothien-3-ylidene)methyl-2,2
-dimethylcyclopropanecarboxylate (R1-2-methyl-4-oxo-3-(2,4-
pentagenyl)-2-cyclobent-1-enyl (l
R) trans-2,2-dimethyl-3-(2-methoxycarbonyl-1-propenyl)cyclopropanecarboxylate 3-allyl-2-methyl-4-oxo-cyclobent-2-enyl 2,2,3° 3-tetramethyl-cyclopropanecarboxylate A pyrethroid compound characterized by lethal effects such as 3-phenoxybenzyl (IR)) lance-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate・5-benzyl-3-furylmethyl (IR) trans-chrysanthemate ・α-cyano-3-phenoxybenzyl 2.2, 3.3
-Tetramethylcyclopropanecarboxylate/α-cyano-3-phenoxybenzyl α-isopropyl-4-chlorophenylacetite/3-phenoxybenzyl (IR3) cis, trans-1(2,2-dichlorovinyl)-2,2 -dimethylcyclopropanecarboxylate/3-phenoxybenzyl (IR3) cis, trans-chrysanthemate/3-phenoxybenzyl (IR) cis.

Trans-chrysanthemate 5-benzyl-3-furylmethyl (1s, 3S) -
(Z)-3-(2-methoxycarbonyl-1-propenyl)-2,2-dimethylcyclopropanecarboxylate/5-benzyl-3-furylmethyl (IR8) cis, trans-chrysanthemate, etc. The invention will be explained in detail by way of example.

To determine the insecticidal effect, a comparative study was conducted using the glass chamber method (immediate effect and lethal effect) and the plywood contact method (residual effect) using adult house flies, which have strong resistance to insecticides.

(1) Test method ■Glass chamber method 20 adult house flies were released into a glass chamber with a pressure of 0.34 rrr, and the test drug 2 was applied at a pressure of 0.9 kg/cd.
1mj! was sprayed.

■Plywood contact method 50ml of the test drug was placed on a 1010x10 plywood board.
The amount equivalent to 1/rd was applied evenly.

(2) Judgment of effectiveness (Evaluation of insecticidal efficacy shown in Examples is specified by symbols as shown below) ■Fast-acting (time for knockdown of 50% or more) A Within 10 minutes B 10 minutes or more Less than 15 minutes C15 Minutes or more Less than 20 minutes 0 20 minutes or more ■Lethal effect (mortality rate after 24 hours) A 90% or more 8 70% or more Less than 90% C 50% or more Less than 70% 0 50% or less ■ Residual effect (50% or more A: 3 weeks or more B: 2 weeks or more Less than 3 weeks 0: 1 week or more Less than 2 weeks D: Less than 1 week Note that the amounts of each active ingredient shown in the examples are appropriate amounts in terms of economic efficiency in each combination. The amount of

(2) An example of an insecticidal composition comprising, as insecticidal active ingredients, an organophosphorus compound, a pyrethroid compound characterized by a knockdown effect, and a pyrethroid compound characterized by a lethal effect.

Example 1 (shown in Table 1) Organophosphorus compound: Pyrethroid compound characterized by fenitrothion knockdown effect...
・Phthalthrin A pyrethroid compound characterized by lethal effects...Permethrin Example 2
(See Table H) Organophosphorus compounds: Pyrethroid compounds characterized by diazinon knockdown effects.
・Phthalthrin A pyrethroid compound characterized by lethal effects・・・・・・・・・Phenothrin Example 3
(See Table ■) Organophosphorus compounds: Pyrethroid compounds that feature fenthion knockdown effects.
・・Pyrethroid compound characterized by allethrin lethal effect・−・・−・・−−−−−Crythron ■, carbamate compound as an insecticidal active ingredient, pyrethroid compound characterized by knockdown effect, and An example of an insecticidal composition comprising a pyrethroid compound characterized by a lethal effect.

Example 4 (shown in Table ■) Carbamate compound...B Pyrethroid compound characterized by PMC knockdown effect...
...Pyrethroid compound characterized by pyrethrin lethal effect...Vermethrin Example 5
(See Table ■) Carbanoite compounds: PHC Pyrethroid compounds, which feature a knockdown effect; Rethroid compounds, which feature a phthalthrin lethal effect: Crythron implementation Example 1 (Table ■) Example 2 (Table ■) Example 3 (Table ■) Example 4 (Table ■) Example 5 (Table ■)

Claims (1)

[Claims] An insecticidal composition consisting of a three-component compound containing an organophosphorus compound or a carbamate compound as an insecticidal active ingredient, a pyrethroid compound characterized by a knockdown effect, and a pyrethroid compound characterized by lethal young fruit. .