JP2013241400A - Termite extermination composition and exterminating method for termite using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a termite extermination composition easily applicable to the habitats of termites, and an extermination method using the same.SOLUTION: A termite extermination composition includes: polysaccharide; and a non-repellent and slow-acting physiologically active component, and its formulation being a suspension, a suspoemulsion agent or an aerosol agent. Further, in a termite extermination method, the same is scattered over the habitats of termites and the peripheries thereof. In this way, termites can be easily exterminated.

Description

  The present invention relates to a termite-controlling composition containing a polysaccharide and a non-repellent and slow-acting physiologically active ingredient, and a termite-controlling method in which it is applied to termite habitats and the vicinity thereof.

  Conventionally, various insecticides have been proposed to prevent damage caused by termites. As an active ingredient of an insecticide for controlling termites, organochlorine insecticides were often used initially. However, due to the high toxicity and residual toxicity, safer organophosphorus and carbamate insecticides have been developed. Later, pyrethroid insecticides and insect growth regulators that were even less toxic to warm-blooded animals were developed. In recent years, neonicotinoid (chloronicotinyl) insecticides have been developed. Already in Europe and the United States, organophosphorus and carbamate insecticides are subject to restrictions on use due to the reassessment of toxicity, and neonicotinoid insecticides have already penetrated the market instead.

  As an insecticidal composition containing these active ingredients, methods using oils, emulsions, suspensions, emulsions, powders, granules, wettable powders and the like have been generally used. In recent years, safety has been considered. Microcapsules have also been used.

  As a control method using these insecticide compositions, there are generally a method of spraying on a xylem or soil under the floor of a building for the purpose of prevention, and a method of spraying directly on a termite habitat for the purpose of control.

  More recently, bait agents have been preferred from the viewpoint of chemical conversion.

  A bait agent is a poisonous bait in which a physiologically active ingredient is added to a pest bait. Termites, which are social insects, are fed by craft ants and brought back to the nest, and the entire colony is maintained by the nutrients. Therefore, if bait is brought back to the nest instead of bait, the physiologically active ingredient is transferred from the individual who has ingested bait to other individuals through mouth-to-mouth or feces, and finally a group including other classes Go inside. Thereafter, the physiologically active substance exerts an effect, and the entire colony can be destroyed.

  Non-repellent insecticides are used as active ingredients of such baits. In addition, for effective extermination, it is required to be a slow-acting insecticide that exhibits an effect after it has spread sufficiently throughout the entire colony.

  Representative insecticides include juvenile hormone-like compounds, chitin synthesis inhibitors, insect growth regulators such as chitin sclerosants.

  The bait preparations used so far are: First, termite bait such as wood is placed in a container made of plastic and buried in the ground. After termites are attracted and eaten by this bait, A method of exchanging, or a method of breaking a part of the ant road and installing a bait agent accommodated in a container in the middle of the ant road is common (Non-patent Document 1).

Journal of Economic Entomology, Vol. 93, no. 5, p1498-1507, Response of Reticulites spp. (Isoptera: Rhinothermitidae) in Northern California to Batting with Hexaflumuron with Sentriton Termination Elimination System, GALL M. GETTY, MICHAEL HAVERTY, KIRSTEN A. COPREN, and VERNARD R.R. LEWIS)

  In principle, bait agents are ingested and have no effect unless brought back to the nest. However, since it is normally in a state of being accommodated in a container, it has been difficult to apply directly to the harmed part. Even when a bait agent is buried in the ground, termite is attracted and does not settle, and a reliable extermination effect cannot be obtained. Since bait agents are used mainly for the purpose of extermination rather than prevention, such an application method in which contact with termites is uncertain has been a major problem in obtaining a reliable extermination effect.

  Therefore, an object of the present invention is to provide a termite-controlling composition that can be easily applied to termite habitats, and a method for controlling it.

  As a result of intensive studies to solve the above problems, the inventors of the present invention contain a polysaccharide and a non-repellent and slow-acting physiologically active ingredient, and the dosage form is a suspension, a suspoemulsion agent or The present inventors have found that termites can be easily exterminated by a composition that is an aerosol agent, and the present invention has been completed.

  That is, the termite control composition according to the present invention contains a polysaccharide and a non-repellent and slow-acting physiologically active ingredient, and the preparation is a suspension, a suspoemulsion or an aerosol.

  In the termite-controlling composition according to the present invention, the non-repellent and slow-acting physiologically active component may take one week or more from the time of being consumed by the termite until the effect is exerted. preferable. The physiologically active ingredient is preferably an insect growth regulator, and more preferably bistrifluron.

  In the termite control composition according to the present invention, the polysaccharide is preferably cellulose.

  Moreover, the termite extermination method according to the present invention is a method in which any one of the above termite extermination compositions is sprayed on the termite habitat and its surroundings.

  By using the termite-controlling composition of the present invention, it can be easily applied to termite habitats and can be easily controlled.

  The termite control composition according to the present invention contains a polysaccharide and a non-repellent physiologically active ingredient, and the preparation is a suspension, a suspension emulsion or an aerosol.

  Although the polysaccharide used for this invention is not specifically limited, Usually, a powdery thing is used. Examples of such polysaccharides include starch, agarose, cellulose, pectin, chitin, carrageenan, xanthan gum, gum arabic, and alginic acid. These polysaccharides may be used alone or in combination of two or more. As the polysaccharide, cellulose is particularly preferable. Moreover, you may use various wood powder, paper powder, pulp powder, etc. as a base material containing polysaccharide.

  The concentration of the polysaccharide in the termite-controlling composition in the present invention may vary depending on the dosage form of the termite-controlling composition and the type of polysaccharide, but is usually 1-80% by weight, more preferably 5-50% by weight. .

  The physiologically active ingredient used in the present invention is not particularly limited as long as it is non-repellent and slow-acting, but it is desirable that it takes one week or more to be effective after being eaten by termites. Examples of such physiologically active ingredients include amidinohydrazone insecticides such as hydramethylnon, insect growth regulators such as metoprene, pyriproxyfen, diflubenzuron, hexaflumuron, chlorfluazuron, bistrifluron, etoxazole, and cyromazine. , Boron compounds and pyridalyl. As the physiologically active ingredient, an insect growth regulator is preferable, and a chitin synthesis inhibitor is more preferable. These physiologically active ingredients may be used alone or in combination of two or more.

  The concentration of the physiologically active ingredient in the termite-controlling composition of the present invention may vary depending on the dosage form of the termite-controlling composition and the type of the physiologically active ingredient, but is usually 0.01 to 20% by weight, more preferably 0.1. ~ 5% by weight.

  The solvent used in the present invention is not particularly limited as long as it dissolves a physiologically active ingredient. Examples of such solvents include water, monohydric alcohols such as ethanol and isopropanol, glycol solvents such as ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, and dipropylene glycol, and derivatives thereof, dimethylformamide, dimethylacetamide, A nitrogen-containing solvent such as N-methylpyrrolidone, a ketone solvent such as acetone and methyl ethyl ketone, an aromatic solvent such as toluene and xylene, and the like are preferable, but a quick-drying solvent is preferable, and ethanol is more preferable. These solvents may be used alone or in combination of two or more.

  The termite control composition according to the present invention is a suspension, a suspension emulsion, or an aerosol as described above. The termite control composition may be sprayed using a nebulizer or may be sprayed as an aerosol. As the dosage form, an aerosol is more preferable.

  The termite control composition in the present invention may be added with other additives depending on the dosage form, for example, stabilizers such as antioxidants and UV absorbers, thickeners, preservatives, rust inhibitors, and the like. Good.

  When the termite-controlling composition in the present invention is an aerosol agent, the termite-controlling composition and the propellant (injection gas), such as a suspension agent and a suspension emulsion, are sealed in an aerosol container equipped with an injection valve. That's fine.

  Examples of the propelling gas used for the aerosol agent include liquefied gas and compressed gas. As liquefied gas, liquefied petroleum gas (LPG), propane, isobutane, n-butane, isopentane, n-pentane, cyclopentane, dimethyl ether (DME), Freon gas (HFC-125, HFC-134a, HFC-143a, HFC- 152a, HFO-1234ze, etc.). Examples of the compressed gas include nitrogen gas, carbon dioxide gas, and nitrous oxide. These jet gases may be used alone or in combination of two or more.

  Next, the termite extermination method using the termite extermination composition comprised as mentioned above is demonstrated. The termite control method according to the present invention is a method in which any of the above termite control compositions is sprayed on the termite habitat and its surroundings.

  In order to apply the termite-controlling composition in the present invention to the termite habitat, the composition may be sprayed directly on an injured site such as wood, or may be sprayed around the injured site. By doing in this way, a termite control composition can be easily eaten by a termite and brought back to a nest for control.

  Moreover, you may use the composition which contains a polysaccharide without a bioactive component in combination with the termite extermination composition of this invention as a termite attractant.

  EXAMPLES Next, although an Example is given and this invention is demonstrated concretely, this invention is not limited by these Examples.

Example 1
0.12 parts by weight of bistrifluron was mixed and dissolved in 79.88 parts by weight of ethanol. To this solution was added 20 parts by weight of Ceorus (crystalline cellulose, manufactured by Asahi Kasei Chemicals Corporation) and pulverized to obtain a suspension.

(Example 2)
An aerosol formulation was obtained by filling an aerosol container with 47.3 parts by weight of the suspension obtained in Example 1 and 52.7 parts by weight of DME gas.

(Example 3)
0.12 parts by weight of bistrifluron was mixed and dissolved in 79.88 parts by weight of ethanol. To this solution, 20 parts by weight of corn starch was added and pulverized to obtain an aerosol stock solution. Next, an aerosol formulation was obtained by filling an aerosol container with 47.3 parts by weight of the stock solution and 52.7 parts by weight of DME.

Example 4
0.12 parts by weight of pyriproxyfen was mixed and dissolved in 79.88 parts by weight of ethanol. The solution was pulverized by adding 20 parts by weight of Theolaus to obtain an aerosol stock solution. Next, 47.3 parts by weight of this stock solution and 52.7 parts by weight of DME gas were filled in an aerosol container to obtain an aerosol formulation.

(Example 5)
0.4 part by weight of hydramethylnon was mixed and dissolved in 79.6 parts by weight of ethanol. The solution was pulverized by adding 20 parts by weight of Theolaus to obtain an aerosol stock solution. Next, 47.3 parts by weight of this stock solution and 52.7 parts by weight of DME gas were filled in an aerosol container to obtain an aerosol formulation.

(Comparative example)
1.5 parts by weight of bistrifluron was mixed and dissolved in 98.5 parts by weight of isopropanol. Thereafter, this solution was uniformly applied to 298.5 parts by weight of commercially available toilet paper (manufactured by Nippon Paper Crecia), and isopropanol was completely volatilized, whereby 0.5% by weight of termite-controlling bait of bistrifluron was obtained. 300 parts by weight of the agent was obtained.

(Control)
0.5 parts by weight of Selney M was mixed with 79.5 parts by weight of ethanol and dissolved by stirring. The solution was pulverized by adding 20 parts by weight of Theolaus to obtain a stock solution for aerosol. Next, 47.3 parts by weight of this stock solution and 52.7 parts by weight of DME gas were filled in an aerosol container to obtain an aerosol formulation.

(Test example)
0.5 g of Ishikawa light (sandy pumice, particle size classification: No. 4) was spread on a petri dish with a diameter of 5 cm, and the aerosol agent of Example 2 was sprayed there so that the total weight after drying was 1.0 g, The powder after spraying was sufficiently dried. Separately, 0.5 g of Ishikawa light (sandy pumice, particle size classification: No. 4) was spread on a petri dish having a diameter of 5 cm, and 0.5 g of the bait preparation of the comparative example was placed there. Separately, 0.5 g of Ishikawa light (sandy pumice, particle size classification: No. 4) is spread on a petri dish with a diameter of 5 cm, and a control aerosol formulation is sprayed there so that the total weight after drying is 1.0 g. The powder after spraying was sufficiently dried. Thirty termite termite ants were released in each petri dish, and after sufficient moisture, observation was performed at 25 ° C. for 8 weeks. The repetition was 3 times. The test results are shown in Table 1.

  As shown in Table 1, the aerosol agent of Example 2 was able to achieve a death rate comparable to that of the bait agent of the comparative example.

  The embodiments and examples disclosed above should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and includes all modifications within the scope and meaning equivalent to the terms of the claims.

  The termite control composition of the present invention and the control method using the same show a termite lethal effect that is inferior to that of existing bait agents and can be used very effectively for the control of termites.

Claims (6)

  A termite-controlling composition comprising a polysaccharide and a non-repellent and slow-acting physiologically active ingredient, wherein the preparation is a suspension, a suspoemulsion or an aerosol.   The termite-controlling composition according to claim 1, wherein the physiologically active ingredient requires one week or more from when it is consumed by a termite until it exhibits its effect.   The termite control composition according to claim 2, wherein the physiologically active ingredient is an insect growth regulator.   The termite control composition according to claim 3, wherein the insect growth regulator is bistrifluron.   The termite control composition according to any one of claims 1 to 4, wherein the polysaccharide is cellulose.   6. A method for controlling termites, which comprises spraying the termite-controlling composition according to any one of claims 1 to 5 on a termite habitat and its surroundings.