JP2006282643A - Insect pest control solution for heating transpiration containing pyrethrum extract as effective component and method of insect pest control - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insecticidal solution stably expressing insect pest control effects for a long time by heating by installing the same in biotope of the insect pests, and an insecticidal method. <P>SOLUTION: The insecticidal solution is prepared by dissolving a pyrethrum extract and a phenol-based antioxidant in a straight chain hydrocarbon or a branched chain hydrocarbon having 200-300°C temperature of 50% off. The insecticidal solution is stably transpired by soaking a part of a porous liquid absorbent wick in the insecticidal solution and heating the unsoaked part of the wick while allowing the insecticidal solution to be absorbed into the wick. The insecticidal solution can decrease the used amount of the effective components from the standpoint of its effect without using materials suspicious to have influences to human bodies and the environment. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention uses a pest control solution comprising a natural wormwood extract, which is a naturally occurring insecticidal component, as an active ingredient, and heats it to efficiently evaporate the active ingredient, thereby reducing the burden on the human body and the environment. It is to provide a method for controlling flies, mosquitoes, cockroaches and other pests that are harmful to the human body under these conditions.

  As an insecticide containing the licorice extract which is one of the active ingredients of the present invention, an aerosol is known for bee control in the following literature. In addition, as a sanitary pest control agent, there is a trade name “Insectside, Piretrin” (Nakamoto Enterprise Co., Ltd.), but this product contains piperonyl butoxide (PBO), a synergist that enhances insecticidal efficacy. ) Is 2.3 times as much as the active ingredient, and there is a need to reduce this synergist. Further, pyrethrin, which is a pyrethroid, is dissolved in a hydrocarbon solvent, and a portion of the porous liquid absorbent core is immersed in the pestroid so that the pest control liquid is sucked into the core while the non-immersed portion of the core is absorbed. A product that exterminates pests by evaporating the pest control liquid absorbed by heating into the atmosphere is also commercially available.

JP 2004-269406 A

The present invention makes it possible to stably carry out heat transpiration of a pest control solution obtained by dissolving a natural wormwood extract, which is a naturally occurring insecticidal component, as an active ingredient, thereby providing a stable pest control effect over a long period of time. The object is to provide a pest control solution for heat evaporation that can be sustained.

  The inventors of the present invention have completed the present invention as a result of repeated studies on an insecticidal method in which a heat-transpirating insect pest control solution in which a mulberry extract is dissolved as an active ingredient is effective over a long period of time.

The present invention is as follows.
1. 60 to 99.99% by weight of straight or branched saturated hydrocarbon (hereinafter referred to as component (a)) having a 50% distillation temperature of 200 to 300 ° C., chrysanthemum extract (hereinafter referred to as (b) Pest control solution for heat evaporation (hereinafter referred to as “component”) containing 0.1 to 10 wt% and phenolic antioxidant (hereinafter referred to as “component (c)”) 0.01 to 10 wt%. This insecticide).
2. In this insecticide, a part of the porous absorbent core is dipped, and the pest control liquid absorbed by heating the non-immersed part of the core is sucked into the atmosphere while sucking the pest control liquid into the core. 2. A method of exterminating pests that have been stably evaporated and do not use materials that are suspected of affecting the human body or the environment, and have reduced the amount of active ingredients used in terms of efficacy. 1. Heating temperature is 150-280 ° C. Insecticidal method described in

  A pest control solution is prepared by dissolving a cypress extract, a naturally occurring insecticidal component, in a linear saturated hydrocarbon having a 50% distillation temperature of 200 to 300 ° C. together with a phenolic antioxidant. By heating the water and efficiently evaporating the active ingredients, it has become possible to control pests such as flies, mosquitoes and cockroaches under conditions that reduce the burden on the human body and the environment.

The Oyster extract used in the present invention is extracted from Oyster, which is a naturally occurring plant, and contains six insecticidal active ingredients. The insecticidal active ingredients are the six ingredients listed in Table 1, and are collectively referred to as total pyrethrin. The total amount of pyrethrin contained in the licorice extract used in the present invention is 10 to 90% by weight, preferably 20 to 80% by weight.
It should be noted that the amount of chrysanthemum extract dissolved in this insecticide is 0.1 to 10% by weight, preferably 0.2 to 8% by weight in this insecticide.

  In the present invention, the 50% distillation temperature is a specific value determined by the solvent species obtained when atmospheric distillation is performed by the method described in JIS K 2254, the constituent ratio, and the like.

As the component (a) used in the present invention, dodecane (50% distillation temperature about 216 ° C.), tridecane (50% distillation temperature about 235 ° C.), tetradecane (50% distillation temperature about 253 ° C.), pentadecane (50 Norpar 13 (ExxonMobil chemistry 50% distillation temperature 231 ° C), Norpar 15 (ExxonMobil chemistry 50% distillation temperature 261) No. 0 Solvent M (Nippon Petrochemical 50% distillation temperature approx. 226 ° C) No. 0 Solvent H (Nippon Petrochemical 50% distillation temperature approx. 250 ° C), Neothiozol (Central Chemical 50% distillation temperature approx. 220 ° C) ), IP solvent 2028 (Idemitsu Petrochemical, 50% distillation temperature about 233 ° C, Isopar M (Exxon Mobil, 50% distillation temperature) About 234 ° C.), Merveille 40 (Showa oil, 50% distillation temperature about 229 ° C.) and the like, can be used as a mixture thereof alone, or two or more kinds.

2,6-di-t-butyl-4-methylphenol (BHT), 2-tert-butylhydroxyanisole (BHA), 4,4′-butylidenebis (3-methyl-6-tert-butylphenol) as phenolic antioxidants 3,9-bis [2- [3- (3-t-butyl-4-hydroxy-5-methylphenyl) -propionioxy] -1,1-dimethyl] -2,4,8,10-tetraoxaspiro [5.5] Undecane and the like.

  This insecticide contains other solvents, parahydroxybenzoic acid ester stabilizers, fragrances, hinokitiol, 3-methyl-4-isopropylphenol, fungicides such as thymol or carbchlor, and other pyrethroids as necessary. An insecticide, a pest repellent, a deodorant such as lauryl methacrylate, and the like may be contained.

  Other solvents that can be used in this insecticide include monohydric alcohols such as methanol, ethanol, isopropyl alcohol, and amyl alcohol, dihydric alcohols such as glycerin, butyl diglycol, ethylene glycol, and propylene glycol, ethylene glycol monomethyl ether, Examples include glycol alkyl ether surfactants such as ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, and propylene glycol monobutyl ether. It is done.

  Examples of flavors include peppermint, mint, cypress, hiba, pine, lavender, patchouli, eucalyptus, citronella, lime, thyme, hyssop, rosemary, tea tree, manuka, ylang ylang, clove, bay, sage and other plant essential oils, salicylic acid Examples include natural fragrances such as methyl, phenoxyethanol, linalool, cineol, citronole, citronellal, eugenol, menthol and menthone, and synthetic fragrances. In the deodorizing liquid for heat evaporation of the present invention, the fragrance is usually contained in an amount of 5% by weight or less based on the total amount of the deodorizing liquid for heat evaporation of the present invention.

  Other pyrethroid insecticides that can be mixed include, for example, 2-methyl-3-allyl-4-oxo-2-cyclopenten-1-yl 3- (2-methyl-1-propenyl) -2,2-dimethylcyclo Propanecarboxylate, 2-methyl-3-propargyl-4-oxo-2-cyclopenten-1-yl 3- (2-methyl-1-propenyl) -2,2-dimethylcyclopropanecarboxylate, 1-ethynyl-2 -Methyl-2-pentenyl 3- (2-methyl-1-propenyl) -2,2-dimethylcyclopropanecarboxylate, 5-propargyl-2-furfuryl 3- (2-methyl-1-propenyl) -2,2 -Dimethylcyclopropanecarboxylate, 3- (2-chloro-2-fluorovinyl) -2,2-dimethylcycloprop -1-carboxylate, 1-ethynyl-2-methyl-2-pentenyl 3- (2-chloro-2-fluorovinyl) -2,2-dimethylcyclopropane-1-carboxylate, 2,3,5,6 -Tetrafluoro-4-methylbenzyl 3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate, 2,3,5,6-tetrafluoro-4-methylbenzyl 3- (2-methyl) -1-propenyl) -2,2-dimethylcyclopropanecarboxylate, 2,3,5,6-tetrafluoro-4-methylbenzyl 3- (1-propenyl) -2,2-dimethylcyclopropanecarboxylate, 2 -Methyl-3-allyl-4-oxo-2-cyclopenten-1-yl 2,2,3,3-tetramethylcyclopropanecarboxyl 2,3,5,6-tetrafluoro-4-methoxylbenzyl 3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate, 2,3,5,6-tetrafluoro-4 -Methoxylbenzyl 3- (1-propenyl) -2,2-dimethylcyclopropanecarboxylate, 2,3,5,6-tetrafluorobenzyl 3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropane Carboxylate, 2,3,5,6-tetrafluoro-4-methoxylbenzyl 3- (2-methyl-1-propenyl) -2,2-dimethylcyclopropanecarboxylate, 2,3,5,6-tetrafluoro Pyreth such as -4-methoxybenzyl 3-methoxyiminomethyl-2,2-dimethylcyclopropanecarboxylate Id based insecticidal compounds. These compounds may have isomers based on a cyclopropane ring and a double bond. In this case, any active isomer can be used.

  The insecticidal solution of the present invention is a linear or branched saturated hydrocarbon solvent having a boiling point of 180 to 280 ° C., chrysanthemum extract, phenolic antioxidant, if necessary, stabilizer, fragrance, other pest control compound It can be produced by mixing an antifungal agent and other deodorant.

The insecticidal method of the present invention can be applied to a heat evaporation type insecticidal device described in, for example, Japanese Patent Publication No. 2-25885, and can provide excellent effects. In this apparatus, usually, a part (usually the lower part) of the porous absorbent core is immersed in the insecticidal solution for heat evaporation of the present invention, the insecticide is absorbed into the core, and the core is not immersed. It is carried out by evaporating the insecticide sucked by indirectly heating the part (usually the upper part) with a heater or the like at a place where pests are generated.
More specifically, FIG. 1 shows an example of an apparatus used in this method. A part of the porous absorbent core 3 is immersed in the insecticide 1, and the insecticide is absorbed by the core. The upper part of the core can be heated by the heating element 2. By indirectly heating the upper part of the lead to a temperature of about 60 ° C. to about 135 ° C. with the heating element 2, the insecticide sucked by the lead can be evaporated in the atmosphere to control pests. . The heating temperature in this case is such that the surface temperature of the heater is usually 80 to 300 ° C, preferably 100 to 200 ° C.
The material of the porous liquid absorbent core used in the heating transpiration device is, for example, a porous inorganic caking body or sintered body that absorbs the heat transpiration insecticide of the present invention and can withstand heating by a heater or the like. The body is mentioned. Examples of the porous material include clay, talc, kaolin, diatomaceous earth, gypsum, perlite, bentonite, acid clay, glass fiber, asbestos and other inorganic powders, pastes such as carboxymethylcellulose, starch, gum arabic, gelatin, polyvinyl alcohol and the like. Those that are caking and molded with an agent are usually used. In addition, this liquid absorption core may contain a pigment | dye, antiseptic | preservative, antioxidant, etc. suitably, for example, can be contained by mixing at the time of caking of the said inorganic powder and a paste.

  Examples of pests to be controlled by this insecticide include various harmful insects, arthropods such as ticks, and particularly harmful flying pests, for example, Culex mosquitoes such as Akaieka, Kogataakaeka, Attaikaeka, Chikaieka, Aedes aegypti, Aedes albopictus, etc. Aedes, Aedes, Chironomidae, Chironomidae, Houseflies, Drosophila, Drosophila, etc. Diptera pests.

Hereinafter, the present invention will be described in more detail with reference to production examples, but the present invention is not limited thereto.

Formulation Example 1
An insecticide 1 according to the present invention was obtained by mixing 6.7 g of jujube extract (purity 76%) and 1.3 g of BHT with 92.0 g of Norper 13 (manufactured by Exxon Chemical Co., Ltd.).

Formulation Example 2
An insecticide 2 of the present invention was obtained by mixing 6.7 g of jujube extract (purity 76%) and 1.3 g of BHT with 92.0 g of Isopar M (manufactured by Exxon Chemical Co., Ltd.).

Formulation Example 3
An insecticidal solution 3 of the present invention was obtained by mixing 6.7 g of jujube extract (purity 76%) and 1.3 g of BHT with 92.0 g of neothiozole (manufactured by Chuo Kasei Co., Ltd.).

Comparative Example 1
A solution of Comparative Example 1 was obtained by mixing 6.7 g of jujube extract (purity 76%) with 93.3 g of Isopar M (Exxon Chemical Co., Ltd.).

Comparative Example 2
A solution of Comparative Example 2 was obtained by mixing 6.7 g of jujube extract (purity 76%) and 1.3 g of BHT with 42.0 g of Isopar M (manufactured by Exxon Chemical Co., Ltd.).

(Test Example 1)
45 ml of the insecticidal solution of the present invention obtained in Production Example 2 was placed in a 50 ml container shown in FIG. 1, and a liquid absorbent core made of an inorganic porous material was attached. This container is incorporated into the heating and transpiration device shown in FIG. 1, and the upper portion of the liquid absorption core is continuously heated indirectly by a heater for 100 hours so that the active ingredient can be transpirated immediately after operation of the insecticide of the present invention in the test space. I made it.
This apparatus is placed on the center of the floor of a glass chamber (0.7 m × 0.7 m × 0.7 m: 0.34 m ³ ) and operated for 10 minutes. After that, 20 female squids are released and free flying. State. 5, 7, 10 insects after the release, from the knock number down over the course of a to time investigate the number of knocked down after 15, 20, 30, 40 and 60 minutes, were calculated _{KT 50} value. The results are shown in Table 2.

(Comparative Test Example 1)
45 ml of the insecticidal solution of the present invention obtained in Comparative Example 1 was placed in the 50 ml container of FIG. 1 and a liquid absorbent core made of an inorganic porous material was attached. This container is incorporated in the heating and transpiration device shown in FIG. 1, and the upper part of the liquid absorption core is indirectly heated with a heater for 100 hours, and then the active ingredient can evaporate immediately after the insecticidal solution of the present invention starts operation in the test space. I did it.
This apparatus is placed on the center of the floor of a glass chamber (0.7 m × 0.7 m × 0.7 m: 0.34 m ³ ) and operated for 10 minutes. After that, 20 female squids are released and free flying. State. 5, 7, 10 insects after the release, from the knock number down over the course of a to time investigate the number of knocked down after 15, 20, 30, 40 and 60 minutes, were calculated _{KT 50} value. The results are shown in Table 2.

(Comparative Test Example 2)
45 ml of the insecticidal solution of the present invention obtained in Comparative Example 2 was placed in a 50 ml container of FIG. 1 and a liquid absorbent core made of an inorganic porous material was attached. This container is incorporated in the heating and transpiration device shown in FIG. 1, and the upper part of the liquid absorption core is indirectly heated with a heater for 100 hours, and then the active ingredient can evaporate immediately after the insecticidal solution of the present invention starts operation in the test space. I did it.
This apparatus is placed on the center of the floor of a glass chamber (0.7 m × 0.7 m × 0.7 m: 0.34 m ³ ) and operated for 10 minutes. After that, 20 female squids are released and free flying. State. The number of knockdowns was investigated 5, 7, 10, 15, 20, 30, 40, and 60 minutes after releasing the insects, and the KT50 value was calculated from the number of knockdowns over time. In Comparative Example 2, since a decrease in efficacy due to clogging of the liquid absorbent core was confirmed, the core portion was washed with acetone and heated for 1 hour, and then tested again. The results are shown in Table 2.

表２に示すように殺虫液２は安定した害虫防除効果を示したが、酸化防止剤を加えない場合や濃度が濃すぎる場合には効果が劣った。

As shown in Table 2, the insecticide 2 showed a stable pest control effect, but the effect was poor when no antioxidant was added or when the concentration was too high.

Sectional drawing of an example of the apparatus applied to the insecticidal method of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Insecticide 2 ... Heater 3 ... Liquid absorption core 4 ... Container which puts an insecticide.

Claims (3)

60 to 99.99% by weight of straight chain or branched saturated hydrocarbon (hereinafter referred to as component (a)) having a 50% distillation temperature of 200 to 300 ° C. and chrysanthemum extract (hereinafter referred to as (b) Pest control for heating transpiration, characterized by containing 0.01 to 10% by weight and 0.01 to 10% by weight of a phenolic antioxidant (hereinafter referred to as component (c)). liquid A part of the porous liquid absorbent core is immersed in the pest control liquid for heat evaporation according to claim 1, and the non-immersed part of the core is heated by sucking the pest control liquid while the core absorbs the pest control liquid. A method of exterminating pests by evaporating the liquid pest control solution into the atmosphere
The pest control method according to claim 1, wherein the heating temperature is 150 to 280 ° C.

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