KR830001608B1 - Insecticidal compositions - Google Patents

Abstract

The mixt. of pyrethroid(I) and o,o-di-isopropyl S-benzylphosphorothiolate(II) is used for insecticide. Thus, several types of the mixt. of I and II control Chilo suppressalis, Nephtettix cincticeps, Oulema oryzae Kuwayama, Agromyza oryzal Munakata, Cnaphalocrocis medinalis Guenee, Parnara guttata Bremer et Gray in rice.

Description

Insecticide composition

The present invention relates to a pesticide composition having a rapid insecticidal effect, low toxicity to mammals, and causing less environmental pollution, wherein the insecticide composition is formula (I) as an active ingredient.

3-phenoxybenzyl chrysanthemate and 0.0-diisopropyl S-benzyl phosphorothiolate (hereinafter referred to as "IBP").

Compound (I) used in the composition of the present invention is one of pyrethroid compounds, and its geometric-optical isomers such as d-trans acid ester and d-cis acid ester also fall within the scope of the present invention.

It is known that compound (I), which is one of the pyrethroid compounds used in the present invention, exhibits a rapid eradication effect against pests such as house flies, mosquitoes and cockroaches, and pests such as nephotettix cincticeps. [Japanese Patent Publication No. 21473/1971]. The lethal effect of compound (I) belongs to the highest class of chrysanthate compounds including natural and synthetic compounds. However, the residual effect on the area of use is not always satisfactory, and the residual effect is not constant when the compound is used alone. That

On the other hand, IBP used in the composition of the present invention shows an excellent effect on the disease of rice, but does not show an insecticidal effect on the pest by the actual dosage.

The present inventors have studied to remove the defects of the compound or to eliminate the resistance of the pest to this pesticide while maintaining the advantages of the compound (I), and as a result, a composition produced by forming the compound (I) with an appropriate amount of IBP We found that the pesticidal effect of can be increased to an unimaginable degree from the effects of the individual components themselves.

The properties of the composition of the present invention are as follows.

1. Rapid effect (quick eradication effect)

2. Highly lethal effect

3. High residue insecticidal effect

4. High insecticidal effect against resistant sea

), 줄점 팔랑나비(Parnara guttata Bremer et Gray)및 바구니, 밭의 해충, 예를들면 담배제거세미나방(Spodopteralitura), 배추좀나방(Plutella zylostella), 배추나방, 진딧물 및 거세나방, 과실수의 해충, 예를들면 잎말이 나방, 진드기 및 나방, 산림의 해충, 예를들면 흰불나방(Hyphantria cunea Drury), 집시나방(Lymantria dsipar

) 및 풍뎅이의 저장곡물에 대한 해충, 예를들면 살바구미(Sitophilus zeamais), 인도산 곡식나방(Plodia intetrpunctella)에 대해서 고치사 및 잔류효과를 나타낸다.The composition of the present invention not only shows a rapid effect, but also pests such as housefly, mosquito and cockroach and the following insect pests, that is, chimney suppresaslis cicada larvae, anchovy, stink bug, rice leaf beetle (Oulema oryzae Kuwayama), rice plant Moth (Agromyza oryzal Munakata), Black Moth (Cnaphalocrocis medinalis)

), Parnara guttata Bremer et Gray and baskets, pests of fields, eg Spodopteralitura, Plutella zylostella, Chinese cabbage moth, aphids and castration moths, pests of fruit trees , For example leaf moths, mites and moths, forest pests, for example Hyphantria cunea Drury, gypsy moth (Lymantria dsipar)

) And beetles on storage grains of scarabs, such as Sitophilus zeamais and Pledia intetrpunctella.

In general, pyrethroid compounds lack stability to light, heat and oxidation, and therefore, in the preparation of the pesticide composition of the present invention, the insecticidal effect of the composition is a stabilizer as an appropriate amount of antioxidants or ultraviolet absorbers, such as phenol derivatives. [Example: BHT, 2,6-di-tert-butyl-4-methylphenol, BHA, butylhydroxyanizol (3-tert-butyl-4-hydroxyanizol and 2-tert-butyl-4- hydroxy) Mixtures with roxyanazole)], bisphenol derivatives, irylamines (e.g. phenyl- -Naphthylamine, phenyl-β-naphthylamine, condensation products of phenetidine and acetone) or benzophenone compounds can be further stabilized.

In addition, a multi-purpose composition having a stronger effect can be prepared by composition of the composition of the present invention with other active ingredients, such as other types of insecticides, fungicides or nematicides.

In preparing the compositions of the present invention, the mixing ratio of compound (I) to IBP is between 1:10 and 10: 1, in particular between 1: 3 and 1:10. As the formulation form of the composition, powders, emulsifiers, hydrating agents, granules, fine granules, emulsions, aerosols, heat fumigants, baits can be used. Generally, the above-mentioned formulation contains 0.05 to 90% by weight of the active ingredient (including the components to be mixed).

Preparation and effect of the composition of the present invention are specifically described by the following formulation examples and siheye, where parts are parts by weight.

A. Mixing of Compound (I) and IBP

Formulation Example 1. Powder

A mixture of 2.7 parts of IBP and 0.3 parts of d, 1-cis, trans isomer of compound (I) was dissolved in 20 parts of acetone, and 97 parts of 300 mesh talc was added thereto, followed by complete stirring. Thereafter, acetone was retained to obtain a powder.

Formulation Example 2 Emulsifying Thickener

D-1-cis of compound (I), 3 parts of isotropic acid isomer, 27 parts of IBP, 55 parts of xylene, and 15 parts of Sorpol (registered trademark of Toho Chemical Co., Ltd.) were continuously mixed and then stirred thoroughly. Thus, a uniform emulsion thickener was obtained.

Formulation Example 3 Hydration

20 parts of IBP20, 5 parts of Sorpol, and 55 parts of white carbon (synthetic silicate hydrate) were continuously added to 20 parts of d, 1-cis and trans isomers of compound (I). The resulting mixture was mixed thoroughly with mortar to give a hydrating agent.

Formulation Example 4 Spray Emulsion

The d-cis of compound (I), 0.05 part of trans isomer and 0.05 part of IBP were mixed, and this mixture was dissolved in kerosene and added to kerosene to make 100 parts. Thus, a spray emulsion was obtained.

Formulation Example 5 Aerosol

The liquid formulation was prepared by mixing the d-cis of compound (I), 0.2 part of trans isomers, 2.0 parts of IBP, 5 parts of crensil, and 7.8 parts of deodorized kerosene. This liquid was placed in an aerosol container. After attaching the valve portion to the vessel, 85 parts of the propellant (liquefied petroleum gas) was charged therein while being pressurized through the valve. Thus, aerosol was obtained.

Formulation Example 6 Microgranules

D, 1-cis, 0.5 parts of trans isomer and 2.0 parts of IBP of compound (I) were adsorbed to 96.5 parts of fine bentonite powder and then mixed for 20 minutes by a Nauta mixer.

To the resulting mixture was added 1 part of Carplex and then mixed for 15 minutes. Thus, fine granules were obtained.

The insecticidal effect of the mixed insecticide composition thus obtained is shown in the following test example.

Test Example 1 Insecticidal Effects on the Tolerant Cicada

Two rice seedlings of the three-leaf stage were planted in the ink bottle, and a required amount of powder was sprayed on the rice seedlings under a reduced pressure (20 cmHg) of a bell jar duster having a bottom area of 1300 cm 2. After standing for 2 minutes, the rice seedlings were covered with a glass tube, and the larvae larva larvae (collected from Ehimekenakagawara) with strong cross resistance to organophosphate and carbamate were placed here. After the passage of time, the number of exterminated insects was calculated and ₅₀ KT (time required for 50% eradication) were obtained.

This result is shown in Table 1.

TABLE 1

As is evident from this table, the composition of the present invention shows a marked synergistic effect, and its pesticidality is unimaginably strong in the single effect of each component.

2. Insecticidal effect on cicada larvae

Rice seedlings in three leaf stages were immersed in the emulsifier of the test composition at the desired concentration, dried by air, and placed in an ink bottle filled with water. This rice seedling was covered with a glass cylinder and filled with fully grown larvae of resistant cicada larvae (collected from Nakagawara, Ehime-chan) with strong cross resistance to organophosphates and carbamates. After covering with an aluminum lid, the seedlings were placed in a room at a constant temperature (25 ° C.) and the mortality was tested after 24 hours. The results are shown in Table 2.

TABLE 2

Test Example 3 Insecticidal Effects on the Tolerant Cicada

The two-leaf rice seedlings planted in a pot (diameter 10 cm) were sprayed with a required powder under reduced pressure (20 cm Hg) with a Belza spreader having a bottom area of 1300 cm 2. After standing for 2 minutes, the Belzaspreader was separated, covered with a wire mesh, and placed in adult greenhouses of resistant cicada larvae and placed in a greenhouse. After 24 hours, mortality was tested. This result is shown in Table 3.

TABLE 3

* Gaya Force 1%, BPMC 1.5%

Test Example 4 Insecticidal Effects on Black Moth

3-Paddy rice seedlings were immersed in the desired chemical concentration, air dried and placed in an ink bottle with water. The seedlings were covered with glass cylinders, and the third stage larvae of black moths were placed therein. After the aluminum cover was covered, the seedlings were placed in a room at a constant temperature (25 ° C.) and the mortality was tested after 48 hours. The results are shown in Table 4.

TABLE 4

2-chloro-1- (2,4-dichlorophosphphenyl) -vinyldimethylphosphate

5. Insecticidal effect on anthracnose and ricehopper

Two rice seedlings planted in a flower pot (diameter 10 cm) were sprayed with a required powder under reduced pressure (20 cm Hg) with a Belzaa sprayer having a bottom area of 1300 cm 2. After being left for 2 hours, the Belzaea were separated, covered with a wire mesh, and then placed in adult greenhouses of larvae and placed in a greenhouse. After 24 hours, mortality was tested. Adult females of rice hoppers were tested in the same manner, and the results are shown in Tables 5, 6 and 7.

TABLE 5

Amelgu

TABLE 6

Rice Melgu

TABLE 7

Test Example 6 Insecticidal Effects on the Tolerant Cicada

The fine granules obtained in Formulation Example 6 were used separately from the cultivated rice planted in the Wagner pollen (1 / 100,000) at a dose of 1 kg / 10are. This rice was covered with a wire cage. Subsequently, 15 adult females of carbamate-resistant cicadas were placed in this cage.

As a control, two pots were treated with a powder containing 0.5% of compound (I) and a powder containing 2% of IBP, respectively. The pots were placed in a greenhouse, tested for living and dead after 24 hours, and the mortality obtained by repeating three times is shown in Table 8.

TABLE 8

Test Example 7 Insecticidal Effect on Resistant Housefly

5 ml of each spray oil obtained in Formulation Example 4 was sprayed by the Campbel's turn table method (soap and sanitary chemistry, Vol. 14, No. 6, page 119 (1938)). Down 100 100 adult females (collected from Tokyo Reclaimland No. 15 and cultured at Sumitomo Chemical Company's Biological Research Institute) for 10 minutes with strong cross resistance to organic combustion, organophosphorus or carbamate Exposed to fog.

As a control, four pots were treated with spray emulsions containing 0.025% of compound (I) and 0.05% of IBP, respectively.

After 24 hours, the average mortality obtained from repeating three trials by testing the number of live and dead flies is shown in Table 9.

TABLE 9

Claims (1)

A pesticide composition containing 1: 10 to 10: 1 of 3-phenoxybenzyl chrysanatemate of the following general formula (I) and 0.0-diisopropyl S-benzylphosphorothiolate.