JP2003092977A - Method for repelling termite to building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To repell termites to a building. SOLUTION: This method for repelling the termites to the building comprises laying a sheet containing a compound having a termite-repelling activity on the lower portion of the building and then treating the passages of the sheet- avoiding termites into the building with a formulation containing a substance different from the compound.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for efficiently controlling invasion of termites that damage wooden structures into the structure.

[0002]

BACKGROUND OF THE INVENTION In order to protect a building from termite feeding damage, a termiticide is applied to soil or a wooden structure under the building, and the termite to the building or the wooden structure is treated. The measures are taken to prevent invasion and feeding damage. However, in recent years it has been pointed out that spraying chemicals into soil may cause environmental problems such as groundwater pollution, and that treatment of termite-killing agents on wood products in buildings is also a cause of sick house syndrome. There is concern about safety in the living space. Under such circumstances, JP-A-63
Japanese Patent Publication No.-70743 and Japanese Patent Publication No. 6-92680 disclose methods for preventing termite invasion by installing a sheet containing a termite-killing agent in the ground or on the ground surface. However, termites enter the building through cracks in the basic concrete of the building or through the small gaps between the boundary between the sheet and the building, so there are cracks in the basic concrete and at the boundary between the basic concrete and the sheet. There is a need for good ways to prevent termite invasion.

[0003]

Means for Solving the Problems As a result of intensive studies aimed at solving the above-mentioned problems, the present inventor has surprisingly found that a sheet containing a chemical substance having repellent activity against termites (hereinafter referred to as repellent active substance) Is installed on the ground or in the ground covered by the building, and a chemical structure different from the repellent active substance to the termites is applied to the termites so as to cover the surface composed of the edge of the sheet and the vicinity of the ground of the building. The present invention has been completed by finding that the problem can be solved by treating a preparation having a compound having a lethal activity without repellent activity against termites (hereinafter referred to as termite-killing substance).

As the repellent active substance relating to the present invention, pyrethroid compounds are preferable, and examples thereof include allethrin, phenothrin, permethrin, cyphenothrin,
Examples thereof include transfluthrin, bifenthrin, etofenprox, silafluofen, cyfluthrin, cyhalothrin, pralethrin, cypermethrin, fenpropatrine, tralomethrin, and deltamethrin. Further, pyrethrin-containing pyrethrum extract is also included in this.

The termite-killing substance contained in the preparation which is treated so as to cover the surface composed of the end portion of the sheet containing the repellent active substance for the termite and the portion close to the ground of the building is nitenpyram, Examples include neonicotinoid compounds such as acetamiprid, phenylpyrrole compounds such as chlorophenapyr, phenylpyrazole compounds, carbamate compounds such as fenobucarb, carbaryl, and propoxer, and organophosphorus compounds such as fenitrothion and fenthion.

[0006] Examples of the preparation which is treated so as to cover the surface composed of the edge of the sheet having the repellent active substance against the termite and the portion of the building close to the ground are emulsions,
Spraying agents such as granules, powders, flowable agents, wettable powders, suspending agents and microcapsules are mentioned. Termites approaching the building move from the center of the sheet to the edge of the sheet under the influence of the repellent active substance, where they encounter a formulation containing the termite-killing substance and die.

[0007] As a preparation to be treated so as to cover a surface composed of an end portion of a sheet having a repellent active substance with respect to the termite and a portion of the building near the ground, the end portion of the sheet and the building Examples include sheet formulations that are attached so as to tie a portion close to the ground. That is, death occurs by moving from the central portion of the sheet to the end portion of the sheet, and eating the sheet containing the termite-killing substance here.

[0008] As the preparation which is treated so as to cover the surface composed of the sheet edge portion having the repellent active substance against the above termite and the portion in the vicinity of the ground of the building, there is also a bait. That is, a formulation prepared by mixing or impregnating a termite-preferring substance with a cellulosic substance preferred by termites is installed evenly so as to cover the end portion of the sheet containing the repellent active substance and a portion close to the ground of the building. By doing so, the termites that have moved from the central part to the end part of the sheet,
Eating food containing termite-killing substances will result in death. A termite attractant may be added to the poison bait preparation. This poison bait installation method, when the termites enter the building by making an ant road from the surface consisting of the seat edge and the vicinity of the ground of the building, by feeding the termite's favorite food, Since it is possible to exterminate not only a part of the termites that have invaded the adjacent portion but also the termites at the rear, it is possible to prevent the termites from escaping from termite-killing substances by creating an ant road.

As the resin used for the sheet containing the repellent active substance or the sheet containing the termite-killing substance according to the present invention, it is preferable to use a polyolefin resin because of environmental issues.

The present invention will be described in more detail in the following examples, but the present invention is not limited to these examples.

[0011]

Formulation Example Formulation 1: An ethylene-vinyl acetate copolymer sheet containing 0.05% cyphenothrin and having a thickness of 200 μm was prepared. Formulation 2: An aqueous solution of nitenpyram was applied to cardboard so that the content of nitenpyram was 0.5%, and after drying, the cardboard was crushed to a diameter of 1 cm or less.

[0012]

[Example] Test section: Side cross section has a base of 10 cm and an upper side of 12
A trapezoidal plastic container of 10 cm in height and 9 cm in height was filled with sand impregnated with 20 ml of water to a depth of 3 cm at the bottom of the container, and about 300 termites were released in the sand. Pieces of red pine (2 x 1 x 1 cm) in this sand
One was buried. A sheet of Formulation 1 was cut into a circle so that the surface of the sand could be roughly covered and placed on the sand.
Next, cardboard crushed pieces of the preparation 2 were spread until the sand surface could not be seen from the portion formed by the end portion of this sheet and the wall surface of the container. Finally 3 pieces of red pine (2 x 1 x 1c
m) was placed on the sheet. Target area: After installing the sheet on the sand surface as in the test area,
The edge of the sheet and the wall surface of the container were attached to each other with a vinyl tape having a width of 2 cm so as to be stitched. Finally, three pieces of red pine (2 x 1 x 1 cm) were placed on the sheet. Observation and evaluation The test container was left in a temperature-controlled room at a temperature of 28 ° C. and a humidity of 60% for one month, and the degree of feeding damage on the piece of red pine placed on the top of the sheet and the survival condition of termites were investigated. Test results In the test area, no feeding damage was observed on the red pine trees installed above, and all termites died. In the target area, termites had invaded the upper part of the laid sheet, and 2/3 of the pieces of red pine were also damaged. The termites were almost safe.

[0013]

EFFECT OF THE INVENTION A sheet containing a compound having a termite repellent activity is laid at the bottom of a building, and the termite avoids the sheet and invades the building containing a formulation containing a substance different from the compound. It was possible to effectively prevent the termites from entering the building by treating the place.

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Claims (10)

[Claims] 1. A sheet containing a compound having a termite repellent activity is laid on the ground occupied by a building or in the ground, and the sheet is a boundary portion with the ground, and the sheet is the building. A formulation containing a termite-killing compound having a chemical structure different from that of the termite-killing compound is treated so as to cover the surface composed of the end portion of the sheet and the portion close to the ground of the building. A method for preventing termites from entering a building characterized by 2. The sheet according to claim 1, wherein the compound having repellent activity against termites is a pyrethroid compound. 3. A preparation containing a termite-killing compound, which is a granule, a powder, a microcapsule, a flowable agent, an emulsion,
The preparation according to claim 1, which is a wettable powder or a suspending agent. 4. The formulation according to claim 1, wherein the formulation containing the termite-killing compound is a termite poison bait. 5. The preparation according to claim 1, wherein the preparation containing the termite-killing compound is a sheet preparation. 6. The preparation according to claim 3, wherein the termite-killing compound is a neonicotinoid compound. 7. The preparation according to claim 3, wherein the termite-killing compound is a phenylpyrazole compound. 8. The preparation according to claim 3, wherein the termite-killing compound is a phenylpyrrole compound. 9. The formulation according to claim 3, wherein the termite-killing compound is a carbamate compound. 10. The preparation according to claim 3, wherein the termite-killing compound is an organic phosphorus compound.