Method for killing insects by heating fumigation

• US 4,745,705 A
• Filed: 07/15/1987
• Issued: 05/24/1988
• Est. Priority Date: 07/18/1986
• Status: Expired due to Term

• Current Assignee: Sumitomo Chemical Company Limited
• Original Assignee: Sumitomo Chemical Company Limited
• Inventors: Takei, Yasuharu, Ohi, Satoshi, Yamamoto, Shinobu, Okada, Kunihiro, Oyama, Shiro
• Primary Examiner(s): Crosby, Gene P.
• Application Number:
  US07/073,459
• Time in Patent Office: 314 Days
• Field of Search: 43/125, 43/124, 43/107, 43/129
• US Class Current: 43/125
• CPC Class Codes: A01M 1/2077 using an electrical resistance as heat source A01M1/2083 takes precedence
• CPC Class Codes: A01N 2300/00 Combinations or mixtures of active ingredients covered by classes A01N27/00 - A01N65/48 with other active or formulation relevant ingredients, e.g. specific carrier materials or surfactants, covered by classes A01N25/00 - A01N65/48
• CPC Class Codes: A01N 25/18 Vapour or smoke emitting compositions with delayed or sustained release
• CPC Class Codes: A01N 53/00 Biocides, pest repellants or attractants, or plant growth regulators containing cyclopropane carboxylic acids or derivatives thereof

Abstract

In a method for knock down of injurious insects or for freeing a particular environment therefrom by heating fumigation comprising dipping a part of a porous absorptive wick in an insecticidal solution to allow it to absorb the solution and indirectly heating said wick around the top to fumigate the absorbed insecticidal solution, a method for knock down of injurious insects or for freeing a particular environment therefrom, which comprises exposing the insects to the vapor, characterized in that a C₁₂ -C₁₈ aliphatic saturated hydrocarbon solution containing as an active ingredient 2-methyl-4-oxo-3-(2-propynyl)cyclopent-2-enyl chrysanthemate is used as said insecticidal solution, a porous absorptive wick prepared by caking a powdery inorganic substance with a binding agent is used as said porous absorptive wick, and besides that said absorptive wick is indirectly heated around the top to a temperature in a range of from 105° to 130° C.

Claims

1. In a method for knock down of injurious insects or for freeing a particular environment therefrom by heating fumigation comprising dipping a part of a porous absorptive wick in an insecticidal solution to allow it to absorb the solution and indirectly heating said wick around the top to fumigate the absorbed insecticidal solution, a method for knock down of injurious insects or for freeing a particular environment therefrom, which comprises exposing the insects to the vapor, characterized in that a C₁₂ -C₁₈ aliphatic saturated hydrocarbon solution containing as an active ingredient 2-methyl-4-oxo-3-(2-propynyl)cyclopent-2-enyl chrysanthemate is used as said insecticidal solution, a porous absorptive wick prepared by caking a powdery inorganic substance with a binding agent is used as said porous absorptive wick, and besides that said absorptive wick is indirectly heated around the top to a temperature in a range of from 105°

to 130°

C.

2. The method according to claim 1, wherein the insecticidal solution containing from 0.5 to 5% by weight of 2-methyl-4-oxo-3-(2-propynyl)cyclopent-2 enyl chrysanthemate.

3. The method according to claim 1, wherein (S)-2-methyl-4-oxo-3-(2-propynyl)cyclopent-2-yl chrysanthemate is contained as an active ingredient.

4. The method according to claim 1, wherein the powdery inorganic substance is clay, talc, kaolin, diatomaceous earth, gypsum, perlite, bentonite, terra abla, glass fibers, asbestos or their mixtures.

5. The method according to claim 1, wherein the binding agent is carboxymethyl cellulose, starch, gum arabic, gelatin, polyvinyl alcohol or their mixtures.

6. The method according to claim 4, wherein the porous absorptive wick is prepared by caking two or more powdery inorganic substances selected from the group consisting of gypsum, clay, terra abla, perlite and diatomaceous earth with carboxymethyl cellulose.

7. The method according to claim 1, wherein the porous absorptive wick is prepared by caking a powdery inorganic substance with carboxymethyl cellulose of from 1 to 10% by weight based on the total weight of the wick.

8. The method according to claim 5, wherein the porous absorptive wick is prepared by caking two or more powdery inorganic substances selected from the group consisting of gypsum, clay, terra abla, perlite and diatomaceous earth with carboxymethyl cellulose.