JPH0680516A - Acaricidal composition - Google Patents

Abstract

PURPOSE:To obtain a composition suitable as a controlling agent for indoor dust mites due to its manifestation of excellent controlling effects on the indoor dust mites. CONSTITUTION:The objective insecticidal composition comprises isopropylmethylphenol as an active ingredient.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is for controlling mites, particularly indoor dust mites such as leopard mites that occur indoors and cause allergic diseases such as childhood asthma and atopic dermatitis. It relates to a composition.

[0002]

2. Description of the Related Art In recent years, the number of houses and condominiums that are highly airtight, the spread of heating, and changes in lifestyles have led to a rapid increase in the damage caused by mites in houses. These mites are one of the causes of childhood bronchial asthma, atopic skin diseases and other allergic symptoms, and they are a major social problem, and it is necessary to prevent their occurrence and breeding in indoor environments. However, the usual insecticides used for home use have a low sensitivity to indoor dust mites, so that sufficient effects cannot be obtained. In order to obtain the effect, an insecticide is used at a high concentration, but it is not economically preferable and it is not preferable in terms of safety. In terms of safety, it is desirable that a place where mites are likely to occur has a high chance of directly touching the human body, such as bedding, tatami mats, carpets, etc., which have low toxicity, but none have been satisfactory.

[0003]

Many of the conventional organic phosphorus insecticides and pyrethroid insecticides for indoor dust mites have low susceptibility to leopard mites and use a large amount of the agents, resulting in environmental pollution and safety. There was a problem with it, and it was not good in terms of economy.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves this problem by providing a composition which is low in toxicity to indoor dust mites and effective in a small amount. Isopropylmethylphenol is known for its bactericidal / antibacterial and antioxidative properties, and in that field cosmetic ingredients
Although it was used as a raw material for pharmaceuticals, it was not examined for general agricultural pests and agriculturally harmful mites as it has little effect. The present inventors, for acaricidal composition, among various studies using indoor dust mites, a composition containing isopropylmethylphenol shows effective results against indoor dust mites, In particular, they have found that they have an excellent effect on Dermatophagoides farinae and completed the present invention. That is, the present invention is an acaricidal composition containing isopropylmethylphenol as an active ingredient. The acaricidal composition of the present invention can be prepared by a conventional method for producing an insecticide or acaricide oil, emulsion, flowable agent, wettable powder, powder, granule, insect repellent paper and the like. In addition, the acaricidal composition of the present invention may contain known acaricides / insecticides, repellents, antibacterial agents and the like as components other than isopropylmethylphenol, if necessary.

[0005]

【Example】

Example 1 5 g of isopropylmethylphenol, 85 g of xylene,
Emulsifier (product name: Toho Chemical Industry Co., Ltd .: Solpol SM)
-200) 10 g was mixed to obtain an emulsion. Example 2 A mixture of 80 parts by weight of isopropylmethylphenol, 4 parts by weight of polyoxyethylene (20 mol) styrylphenyl ether, 1 part by weight of dioctyl sulfosuccinate and 16 parts by weight of water, 350 g of a mixture having a diameter of 1 mm was used as a glass beer. 1000g
And put it in a pal mill with an internal capacity of 1 liter and run at a peripheral speed of 4 m / sec
It was pulverized for an hour to obtain a flowable agent. Example 3 10 g of isopropylmethylphenol was added to isopropanol
25 g of the remaining deodorized kerosene was added to 100 ml to obtain an oil solution. Experimental Example 1 A filter paper of 10 × 10 cm (Toyo Filter Paper No.
5A) was applied in a predetermined amount and air-dried, and then a medium with well-grown Dermatophagoides farinae was laid thinly on the bottom of a container of 40 × 40 cm and 12 cm in height. In the container, two sheets were placed diagonally apart and similarly untreated filter paper was placed, and a water-tensioned dish with a diameter of 3 cm was placed in the center of each filter paper and sealed, and after 24 hours, a mite on the water surface of the dish. I checked the number of. As a result, as shown in Table 1, there was a controlling effect of preventing mites from turning.

[0006]

[Table 1] Repellent rate = {1- (number of mite in treated area / number of mite in untreated area)} × 100 Experimental Example 2 Filter paper (Toyo Filter Paper No. 5A) is cut into 10 × 5 cm, and the emulsion of Example 1 is diluted with water. Apply evenly to the prescribed amount, fold in air and fold in half, and put 50-60 ticks in each. Scissor the opened 3 sides with paper scissors clips and enclose the ticks at 25 ° C, humidity 75 % Indoors for 24 hours, 48
After leaving it for a period of time, it was taken out and examined for the mortality of mites under a microscope. (Individuals who could not move even if they were touched with a patterned needle were regarded as deadly). As a result, as shown in Table 2, an acaricidal effect was recognized.

[0007]

[Table 2]

[0008]

INDUSTRIAL APPLICABILITY The composition of the present invention provides an excellent control effect against indoor dust mites and is suitable as an indoor dust mite control agent.

Claims (1)

[Claims] 1. An acaricidal composition comprising isopropylmethylphenol as an active ingredient.