JPH02142705A - Acaricide against indoor acarid - Google Patents

Abstract

PURPOSE:To obtain the title acaricide effective for expelling acarids occurring in houses and having various damages on human body, showing excellent acaricidal effects on many acarids such as acarids of the family Cheyletiade in a wide range, having safety to human body, comprising benzoic acid, etc., as an active ingredient. CONSTITUTION:An acaricide having fungicidal effects, mildewproofing effects, excellent safety contained in standard of food additive and cosmetic raw material, comprising one or more of benzoic acid, salicylic acid and dehydroacetic acid as an active ingredient. The active ingredient shows excellent effects alone, can exhibit effects on most acarids by effective blending, prepared into oil agent, emulsion, dust, fumigant, aerosol agent, water dispersion, etc., as an acaricide and used. In use, paper or cloth is treated with the acaricide to give an insecticidal sheet, which is used under carpets, or textile base of carpet is treated with the acaricide or the acaricide is added to a backing agent and used as an acaricide preventing carpet.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the extermination of mites that occur inside houses and cause various harm to the human body.

(Prior Art) It has been known for a long time that mites that occur inside the house are related to fulminant diseases, allergic diseases, and asthma, and there is a great deal of interest in general households. The main ones are mites, mites, and mites, but there are also mites, mites, dust mites,
Many types of mites are known, including the tick mite.

Looking at the occurrence of mites, which cause a lot of damage, we can see that recently the structures of houses have become airtight, and
This is thought to be due in part to the widespread use of air conditioning and heating, which has made the temperature and humidity suitable for the breeding of mites.

Household insecticides are used to exterminate mites, which are sanitary pests, and the majority of these chemicals are liquids and aerosols. However, in many cases, these drugs cannot be expected to have sufficient medicinal efficacy, such as being effective against some living mites but not against others, and a solution to this problem is needed. was.

(Problem to be Solved by the Invention) As described above, no matter how strong the chemicals used to exterminate mites in the house are, they have no harmful effects on the human body. It is not a good thing if there is. Conventionally used organophosphorus insecticides such as diazinon, fenthion, and fenitrothion have strong efficacy, but from a toxicity point of view, the less toxic pyrethroid insecticides resmethrin and permethrin etc. are used as acaricides.

However, these drugs also have problems with their toxicity to the human body, and it can be said that we are at a major turning point.

(Means for Solving the Problem) The present inventors have been conducting research on drugs that are also effective against the problematic horned mites, Dermatophagoides mites, and Dermatophagoides mites. The present invention was completed based on the discovery that a drug containing one or more selected from salicylic acid and dehydroacetic acid as an active ingredient has excellent acaricidal efficacy against many mites over a wide range of species.

Benzoic acid, salicylic acid, and dehydroacetic acid used in the present invention have long been reported to be effective in bactericidal and antifungal properties, and are so safe that they are listed in food additive and cosmetic raw material standards. Although it is an excellent compound, it has never been used as an acaricide.

The substance of the present invention has remarkable efficacy when used alone, but by effectively blending these compounds, it becomes effective against most types of mites. Moreover, it can be said to be an excellent acaricide that has already been recognized for its bactericidal and antifungal properties.

The method of using the drug of the present invention includes oil preparation, emulsion, powder, granule,
Acaricides such as aerosols, water suspensions, and aqueous solutions can be used. An example of the use of the chemical is to treat paper or cloth and use it under carpets as an insect repellent sheet. Alternatively, in addition to treating the base fabric of a carpet, it can be added to a backing agent to make it a dust mite-proof carpet. In addition, by treating floorboards, furniture, and textiles, it is possible to obtain furniture and bedding that prevent dust mites, as well as provide a comfortable living environment.

The present invention will be explained below with reference to Examples.

Example 1 10 each of dehydroacetic acid, benzoic acid and salicylic acid
g is polyoxyethylene nonylphenyl ether (E,
010 mole) and 80 g of Hensen were dissolved to obtain respective emulsions.

Example 2 40 each of dehydroacetic acid, benzoic acid and salicylic acid
g is polyoxyethylene nonylphenyl ether (E,
015 mol) in 55 g of water and treated in a sand grinder for 1 hour to obtain respective aqueous dispersions with particle sizes ranging from 1 to 10 microns.

Example 3 2g each of dehydroacetic acid, benzoic acid and salicylic acid
was dissolved in 98 g of white kerosene to obtain each oil solution.

Example 4 3 g each of dehydroacetic acid, benzoic acid and salicylic acid
isoparaffin (b, p 1so~190°C) 1
00d and filled into an aerosol container, 10 ml of propellant (LPG gas) was pressurized and filled from the valve part to obtain each aerosol.

Experimental Example 1 Tests were conducted on the insecticidal effects of dividroacetic acid, benzoic acid, and salicylic acid alone, and the results are shown in Table 1.

Test method Cut filter paper (Toyo Roshi N05) into 10c+nx5cm pieces.
The chemicals of Examples 1, 2, and 3 were diluted with water, and the chemicals of Example 4 were diluted with benzene, and treated to achieve each concentration, and the solvent was completely volatilized. Fold this filter paper in half to 5 cm x
Make it 5 cm in size. Place 50 to 60 live mites inside the fold, completely seal the outside of the fold with a clip, and leave it in a room at a temperature of 26°C and humidity of 75% for 24 hours, then remove the clip. Mite mortality was recorded using a stereomicroscope.

Table 1 Experimental Example 2 A test was conducted on the insecticidal effect of a combination formulation with dehydroacetic acid, benzoic acid and salicylic acid, and the results are shown in Table 2.

Experimental Example 3 Since organic acids were thought to have a miticidal effect, a miticide test using various organic acids was conducted. The results are shown in Table 3.

The test method involved dissolving various chemicals in ethanol and applying them to filter paper to perform a miticide test.

(Effects of the Invention) As seen in the results in Table 3, benzoic acid, dehydroacetic acid, and salicylic acid exhibited superior acaricidal effects compared to other organic acids.

Table 3 Procedural amendment January 9, 1989

Claims (1)

[Claims] A miticide for indoor dust mites, characterized by containing one or more of benzoic acid, salicylic acid and dehydroacetic acid as active ingredients.