JP2002363002A - Method for enhancing efficacy of insecticidal aerosol agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means effective for enhancing the knockdown efficacy and insecticidal efficacy of an insecticidal aerosol agent. SOLUTION: This method for enhancing the efficacy of the insecticidal aerosol agent is characterized by formulating water in an amount of 1-10 wt.% based on the total amount of the insecticidal aerosol agent and regulating the content of a propellant to >=65 wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for enhancing the efficacy of an insecticide aerosol.

[0002]

2. Description of the Related Art Conventionally, in order to effectively control pests,
It is known to enhance insecticidal efficacy using synergists such as piperonyl butoxide and octachlorodipropyl ether, aromatic carboxylic acid esters, fatty acid esters, and certain surfactants. These means have a problem that the insecticidal efficacy cannot be sufficiently enhanced depending on the kind of insecticidal component used, the preparation, and the like. For this reason, various means have been studied, but are not sufficient, and there is still room for study. Particularly, in the case of insecticide aerosols that are required to act immediately on pests, it is effective to increase the insecticidal efficacy. It is the present situation that such means are desired.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an effective means for enhancing the knockdown effect and insecticidal effect of an insecticide aerosol in view of the above situation.

[0004]

Means for Solving the Problems The present inventors have conducted intensive studies in order to solve the above-mentioned problems, and as a result, a specific amount of water has been added to the insecticide aerosol, and the content of the propellant has been set to a predetermined amount. It was found that the knockdown effect and the insecticidal effect can be enhanced without using a synergist or the like. That is, the present invention is achieved by the following configurations. (1) A method for enhancing the efficacy of an insecticide aerosol, wherein 1 to 10% by weight of water is mixed with respect to the total amount of the insecticide aerosol, and the content of the propellant is 65% by weight or more. (2) The method for enhancing the efficacy of an insecticidal aerosol according to claim 1, wherein a paraffin-based solvent is mixed in a weight ratio of 2 to 5 times with respect to water.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the method for enhancing the efficacy of an insecticide aerosol of the present invention (hereinafter also referred to as the efficacy enhancing method), water is used in an amount of 1 to 10% by weight, preferably 4 to 8% by weight based on the total amount of the insecticide aerosol. And the content of the propellant is 65% by weight or more, preferably 70 to 90% by weight, based on the total amount of the insecticide aerosol.

[0006] By blending a paraffin-based solvent in a weight ratio of water to 2 to 5 times, more excellent knockdown effect and insecticidal effect can be obtained. When a paraffinic solvent is used, it is necessary to use a surfactant in order to stably emulsify the insecticidal component, and 0.01 to 10% by weight, preferably 0.5 to 10% by weight based on the total amount of the insecticide aerosol. 5% by weight is blended. As the surfactant, glycerin fatty acid ester, sorbitan fatty acid ester,
Nonionic surfactants such as polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene polyoxypropylene glycol, polyethylene glycol fatty acid ester, and polyethylene glycol sorbitan fatty acid ester are exemplified. In particular, when polyoxyethylene sorbite tetraoleate and sorbitan coconut oil fatty acid are used in combination, the emulsification of the insecticide aerosol becomes more stable, and the knockdown effect and the insecticidal effect become excellent.

[0007] The efficacy enhancing method of the present invention can be applied to insecticide aerosols containing insecticidal components, solvents and propellants. The following are mentioned as an insecticidal component, a solvent, and a propellant used for such an insecticide aerosol.

Examples of the insecticidal component include pyrethroid compounds such as natural pyrethrin, pyrethrin, allethrin, phthalthrin, resmethrin, framethrin, permethrin, phenothrin, cyphenothrin, pralethrin, transfluthrin, imiprothrin, empentrin, etofenprox and the like; propoxer, carbaryl Organic phosphorus compounds such as fenitrothion and DDVP; oxadiazole compounds such as methoxadiazone; pyrazole compounds such as fipronil; fittintide, peppermint oil, orange oil, cinnamon oil and clove oil. Essential oils; IBTA; IBTE; quaternary ammonium salts; benzyl salicylate and the like. One or more of these can be used, and 0.1 to 1% by weight based on the total amount of the insecticide aerosol, and further 0.1 to 0.5%
It may be used so as to be% by weight.

Examples of the solvent include paraffinic solvents such as normal paraffin, isoparaffin, and mixtures thereof; alcohols such as ethanol and denatured alcohol; carbonates and lactates; polyvinylpyrrolidone; glycol; Using one or more of these, 10 to 30 with respect to the total amount of the insecticide aerosol.
%, Preferably 15 to 30% by weight.

[0010] As the propellant, liquefied petroleum gas, liquefied gas such as dimethyl ether, difluoromonochloroethane and the like;
Carbon dioxide gas, nitrogen, compressed gas such as compressed air and the like,
One or two or more of these are used.

Further, insecticide aerosols include repellents such as diethylmethtoluamide, di-n-butylsuccinate and hydroxyanisole; fungicides such as PCMX and IPBC;
Deodorants such as lauryl methacrylate, geranyl crotonate, and catechin; essential oils such as rose oil, lavender oil, and peppermint oil; fragrances such as pinene, limonene, linalool, menthol, and eugenol; nonionic surfactants; Surfactants such as surfactants, anionic surfactants and amphoteric surfactants; synergists such as S421 and sinepirin;
An antioxidant such as BHT or BHA may be blended.

The efficacy enhancing method of the present invention can be applied to insecticidal aerosols used for various insect pests such as flies, mosquitoes, cockroaches, spiders, mites, pitworms, gegegeji, dam ants and ants.

[0013]

The present invention will be described below in detail with reference to examples. However, the present invention is not limited to only these examples.

(1) Insecticidal efficacy test Insecticidal aerosols (samples 1 to 3) shown in Table 1 were prepared.
Twenty adult female house flies were placed in a cage (25 cm × 25 cm × 25 cm) and sprayed for 1 second from a distance of 1 m. Then, KT90 (90% knockdown time (sec)) and mortality (%) after 24 hours were determined. As a comparison, the same test was carried out using an insecticide aerosol containing no water (commercially available product A) and an insecticide aerosol containing 50% by weight of a propellant and containing water (commercially available product B).

[0015]

[Table 1]

As shown in Table 2, the samples 1 and 2 using the potency enhancing method of the present invention were superior to the sample 3 and the commercial product in both knockdown efficacy and insecticidal efficacy. Was.

[0017]

[Table 2]

[0018]

EFFECT OF THE INVENTION According to the method for enhancing potency of the present invention, the knockdown effect and the insecticidal effect of the insecticide aerosol can be increased without using a synergist or the like.

Claims (2)

[Claims] 1 to 10 parts by weight based on the total amount of the insecticide aerosol.
A method for enhancing the efficacy of an insecticide aerosol, characterized in that water is blended in an amount of 65% by weight and a propellant content is 65% by weight or more. 2. The method for enhancing the efficacy of an insecticide aerosol according to claim 1, wherein a paraffin-based solvent is mixed in a weight ratio of 2 to 5 times with respect to water.