JPS6348203A - Vermin repellent - Google Patents

Abstract

PURPOSE:To provide a vermin repellent containing a specific lactone compound such as 4-nonanolide, 4-undecanolide, 5-undecanolide, etc., as an active component and exhibiting excellent repelling effect against various vermin such as fly, mosquito, cockroach, etc. CONSTITUTION:The objective vermin repellent contains the lactone compound of formula (R is 4-7C alkyl; R1 is H or CH3; n is 1 or 2) known as a perfumery component of coconut, apricot, peach, cream, whiskey, brandy, cognac, etc., as an active component. The repellent exhibits excellent repellent effect against various kinds of vermin, e.g. flies such as house fly, mosquitoes such as common gnat, cockroaches such as German cockroach, etc., compared with conventional vermin repellent. The amount of the above compound to be applied is 0.1-10g per 1m<2> of area to be applied or 0.005-0.1mg per 1g of a powdery carrier, etc., to be compounded.

Description

Detailed Description of the Invention <Industrial Application Field> The present invention relates to the general formula [I] 1, where R represents an alkyl group having 4 to 7 carbon atoms, and R1
represents a hydrogen atom or a methyl group, and n represents an integer of 1 to 2. ] The present invention relates to an insect repellent containing a lactone compound as an active ingredient.

□ PRIOR ART> As a conventional insect repellent, N,N-diethyl-m-toluamide (hereinafter referred to as DEET) is generally widely used.

<Problems to be solved by the invention> However, the compound has insufficient efficacy, etc.
It is difficult to say that this is necessarily satisfactory.

Means for Solving the Problems> In view of the above circumstances, the present inventors conducted intensive studies in order to develop a compound with better pest repellent efficacy, and as a result, they discovered a compound represented by the general formula [l]. The present inventors have confirmed that the lactone compound has superior repellent efficacy compared to known pest repellents, and have completed the present invention.

The lactone compound represented by the general formula 11'J is known as an aroma component of coconut, apricot, beach, cream, whisky, brandy, cognac, etc. Specific examples include 4-nonanolide (hereinafter referred to as compound (1)), 4-undecanolide (hereinafter referred to as compound (2)), 5-undecanolide (hereinafter referred to as compound (8)), 8-methyl-4-octanolide (hereinafter referred to as compound (4)), Examples include 8-methyl-4-nonanolide (hereinafter referred to as compound (5)).

Examples of pests against which the present lactone compound is effective include flies such as the house fly, insects such as Culex mosquito, and cockroaches such as the German cockroach. These compounds can be used as pest repellents either as they are or in the form of suitable formulations. Specifically, it is formulated into creams, aerosols, etc. and used in the same way as conventional repellents by methods well known to those skilled in the art. It is also possible to directly infiltrate these compounds into a glass capillary or porous material and gradually vaporize them.

Application of the compound of Koe Nako 4% et al.
0.1 to 10y1 or when mixed into powdered carrier etc. 11
It is 0.005 to 0.1 per.

<Examples> The present invention will be explained in more detail with reference to Examples below, but the present invention is not limited thereto.

EXAMPLE 1 ml of a solution of the compound shown in Table 1 diluted with acetone at a predetermined concentration was applied to P paper having a diameter of 7 m, and dried with forced air. A sheet of treated paper and one sheet of untreated P paper were hung in a cage, and approximately 800 adult Culex mosquitoes were released. Then P
The number of insects resting on the paper was observed four times at 5, 10, 15, and 20 minutes later. Note that the force that is stationary on the P paper is blown away by striking it.
The cage position was rotated in 90° increments. The values observed four times were averaged and the repellency rate was calculated using the following formula.

Repulsion rates were calculated for each of the 8 replicates and averaged. The results are shown in Table 1.

Table 1 Example 2 A solution of the test compound listed in Table 2 diluted with acetone at the expected concentration was added to house fly feed (Mi22 x 2851).
and water, and released 200 house flies. The number of flies feeding on the bait was observed every 15 minutes for 2 hours. The values observed 8 times were combined and the repellency rate was calculated using the following formula.

The repellency rate was calculated for each of the two replicates and averaged. The results are shown in Table 2.

Table 2 <Effects of the Invention> The lactone compound of the present invention exhibits an excellent repelling effect on various pests such as flies, insects, and cockroaches, and is useful as a pest repellent.

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Claims (1)

[Claims] General formula ▲ Numerical formula, chemical formula, table, etc. ▼ [In the formula, R represents an alkyl group having 4 to 7 carbon atoms, R_
1 represents a hydrogen atom or a methyl group, and n represents an integer of 1 to 2. ] An insect repellent characterized by containing a lactone compound represented by the following as an active ingredient.