JP2005154364A - Method for controlling termite - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for controlling termites, having both of the prevention of penetration of termites and the extermination performance surely killing termites. <P>SOLUTION: This method for controlling termites comprises using a large granular carrier having ≥3 mm and ≤8 mm long particle size which has not been known hitherto or a mixture of the granular carrier having the particle size with a granular carrier having ≥1 mm and <3 mm longest particle diameter or a mixture of the granular carriers containing 0.001 wt.%-5 wt.%, preferably 0.01 wt.%-0.5 wt.% unrepellent insecticide. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a termite control method for protecting houses and the like from termite damage.

  There are many examples of termites that dive into the ground and invade from under the floor of the house, and damage wood such as foundations, floor bundles, and large jackings. In order to prevent this damage, it is widely practiced to spray an insecticide for termite control, which is diluted with water and used in liquid form, under the floor of a house. However, there is a problem that it takes time to spray the liquid agent.

  A method of using granules (hereinafter referred to as a granule spraying method) is known as a termite control method that is easy to process instead of the liquid spraying. For example, porous granular carriers with particle sizes in the range of 200 to 3000 μm (sintered products such as vermiculite, bentonite, kaolinite, pearlite, natural pumice, silicazil, etc.), organophosphorus, carbamate or pyrethroid insecticides The termite-proof granule impregnated and supported is disclosed, and it is described that this granule is sprayed under the floor of a house. (For example, Patent Document 1)

It has also been reported that termites can be prevented from penetrating with a granular carrier having a diameter of 1.7 to 2.4 mm that does not contain an insecticide. (For example, Non-Patent Document 1) However, in an actual site, an example in which a granule having a particle diameter in this range does not have a penetration preventing effect has been seen. Pyrethroid insecticides are particularly repellent to termites and are excellent in terms of keeping termites away, but are not suitable for killing termites. If termites are not killed, there will be termites in the vicinity indefinitely, allowing termites to enter.
Japanese Examined Patent Publication No. 7-103004 Timber 10,2001. Treating Subterranean Termite Attacks in Buildings. BCPeters, J. King and FRWylie

  It is an object of the present invention to provide a termite control method having both terminator prevention by a granular carrier layer of termites and an extermination performance for reliably killing termites in a method for controlling termites by spraying granules under the floor of a house.

  As a result of intensive studies to solve the above-mentioned problems, the present inventor has found that a granular carrier having a longest particle diameter of 3 mm or more and 8 mm or less, which is not known at all, or a granular carrier having this particle diameter has a longest particle diameter of 1 mm or more. A granular carrier in which a granular carrier of less than 3 mm is mixed in a range of less than 50 (% by weight), or a neonicotinoid insecticide, a phenylpyrazole insecticide, an oxadiazine insecticide and / or these granular carriers are used. Alternatively, this problem can be solved by using a granular carrier containing 0.001% to 5% by weight, preferably 0.01% to 0.5% by weight, of chlorfenapyr.

  According to the present invention, it is possible to effectively prevent termites from penetrating, and by incorporating a non-repellent insecticide in the granular carrier, not only penetration prevention but also complete termite extermination becomes possible. For this reason, it has become possible to reliably protect houses and the like from termite damage by a safe granule spraying process.

Hereinafter, the present invention will be described in more detail.
Examples of the granular carrier that can be used in the present invention are (1) vermiculite, bentonite, Ishikawa light, permister, kaolinite, sepiolite, attapulgite, palpgorskite, and other mountain skins, diatomaceous earth, allophane, zeolite acid-treated products, Sintered molded products of clay, (2) natural glass sintered bodies such as perlite, (3) glass beads, (4) plastic beads, (5) natural pumice, (6) naturally produced minerals such as silicazil, Such modified products are used.

  In the present invention, the granular carrier can be used as it is, but it is also possible to use a non-repellent insecticide on the granular carrier as it is or by dissolving it in a suitable solvent and impregnating it. When a non-repellent insecticide is carried on the granular carrier, various additives can be used in combination as necessary. Such additives include alkyd resins, styrene resins, acrylic resins, butadiene and isoprene resins, vinyl acetate resins, ethylene-vinyl acetate copolymer resins, urethanes for adjusting the elution and volatilization rate of active ingredients in granules. Examples thereof include polymer substances such as resins and petroleum resins, and potency enhancers such as chlorinated paraffin, piperonyl butoxide, cinepilin, and sesamin.

Non-repellent insecticides used in termite control granules that have the ability to control termites include neonicotinoid insecticides (such as imidacloprid, acetamiprid, nitenpyram, clothianidin), oxadiazine insecticides ( Indoxacarb, etc.), chlorophenapyl, phenylpyrazole insecticides (such as fipronil), and the like. These insecticides can be used alone or in combination of two or more.
The concentration of the non-repellent insecticide in the granular carrier is determined by the type of insecticide used and the granular carrier, use conditions, etc., but is 0.001% to 5% by weight, preferably 0.01% to 0.5% by weight. It is a range.

  If necessary, one or two insect growth regulators or food poisons (pyriproxyfen, phenoxycarb, hydramethylnon, diflubenzuron, chlorfluazuron, hexaflumuron, triflumuron, sulfuramide) or boron compounds. More than one species can be used in combination with the aforementioned non-repellent insecticide.

  The method for producing a granular carrier according to the present invention is not particularly limited. The granular carrier is sieved to the particle size using a vibrating sieve or the like. In addition, when the insecticide is supported, it can be produced by impregnating and supporting the insecticidal agent on the particulate carrier by mixing the particulate carrier and the solvent, if necessary, with the additives and other additives added and mixed. it can.

  The method of applying the granular carrier to the soil according to the present invention can form a layer of 1 cm or more and 20 cm or less, preferably 2 cm or more and 5 cm or less in a portion where termites may penetrate from the underground to the ground surface. The means is not limited at all.

  The granular carrier layer is most preferably formed uniformly over the entire surface under the floor. However, it is preferable to process non-uniformly so that the amount of spraying treatment increases in places where uniform processing is not possible or where termites are likely to enter. For example, termites often invade from the soil in the vicinity of the fabric foundation that surrounds the floor of the house, so the processing amount of the part can be about 2 to 3 times the processing amount to other places. preferable. Further, a groove (for example, a groove having a depth of about 30 to 40 mm) may be dug inside the cloth base, and the granular carrier may be intensively processed in the portion.

  Hereinafter, the present invention will be described with reference to test examples, but the present invention is not limited to these test examples.

表１より、最長粒剤３ｍｍ以上８mm以下の粒状担体と最長粒径１ｍｍ以上３mm未満の粒状担体との混合比率が１対１から75対25の範囲においては、いずれの長さの層においても優れた貫通防止効果を示した。最長粒径３ｍｍ以上８mm以下の粒状担体では、層が1cmのみで１反復のみ貫通が認められたが、その他はまったく貫通が認められなかった。以上の結果から、この粒径においても貫通防止効果が期待できるものと判断された。 (1) Test material:
As the granular carrier, pumice (Ishikawa Light manufactured by Ishikawa Light Industry Co., Ltd.) adjusted to a maximum particle size of 1 mm or more and less than 3 mm and pumice adjusted to a particle size of 3 mm or more and 8 mm or less (described above) were used. As the test soil, pumice having a particle size of around 590 μm containing 25% water (described above) was prepared (hereinafter referred to as soil).
(2) Test insects: 25 termite ants
(3) Test method:
A transparent glass having an inner diameter of 1.5 cm and a height of 10 cm was prepared, and a silicon stopper was inserted from the bottom to 3 cm. The soil was packed so hard that the soil would not fall even if it stood vertically between 3 cm and 5 cm from the bottom. Next, granular carriers having different particle diameters were packed in various combinations in widths of 1, 2, and 3 cm from the top of the glass tube, and a silicon plug was inserted from the top until the upper surface of the granular carrier was touched. Next, with the bottom facing up, the bottom silicon plug was removed, 25 test insects were released, and a small wooden stick was inserted so that the bottom and soil were in contact with the wooden stick. The wooden stick was stabbed into the soil by about 5 mm. The bottom opening was covered with aluminum foil and fixed with cellophane tape. Next, with the bottom part facing down, the upper silicon stopper was removed, 6 mm square filter paper was placed on the granular carrier, and the upper opening was covered with aluminum foil. The glass tube set in this manner was allowed to stand vertically, and after one week, it was investigated whether or not the test insect penetrated the layer of the granular carrier. The test was repeated three times.
(4) Test results: Table 1 shows the results.

According to Table 1, the mixing ratio of the granular carrier having the longest particle size of 3 mm or more and 8 mm or less and the granular carrier having the longest particle diameter of 1 mm or more and less than 3 mm is in the range of 1: 1 to 75:25 Excellent anti-penetration effect. In the granular carrier having a longest particle diameter of 3 mm or more and 8 mm or less, the layer was only 1 cm and penetration was observed only once, but in the other cases, penetration was not observed at all. From the above results, it was determined that the penetration preventing effect can be expected even with this particle size.

表２より、いずれの粒状担体においても貫通防止効果が認められた。しかし、ピレスロイド系殺虫剤であるペルメトリン、シフェノトリンでは、死虫率が低く、シロアリを駆除するという性能には劣った。一方、忌避性の無いフィプロニル、クロルフェナピル、クロチアニジンを含有する粒状担体は、100％の優れた致死効果が認められた。 (1) Test material: As a granular carrier, pumice (the above-mentioned) adjusted to a maximum particle size of 3 mm to 8 mm was used. As the test soil, pumice having a particle size of around 590 μm containing 25% water (described above) was prepared (hereinafter referred to as soil).
(2) Test granules: emulsion containing 5% permethrin, emulsion containing 5% ciphenothrin, flowable preparation containing 2% fipronil, flowable preparation containing 21.4% chlorfenapyr (manufactured by BASF Agro) or Prepare an aqueous suspension containing 7.5% clothianidin (manufactured by Takeda Pharmaceutical Co., Ltd.) and dilute it with water so that the concentration of each active ingredient is 1.0%. The solution was uniformly added dropwise so as to be 10 parts by weight, stirred and air-dried. The final concentration of each active ingredient was 0.1% with respect to the test material.
(3) Test insect: A group of 25 termite ants
(4) Test method:
A transparent glass having an inner diameter of 1.5 cm and a height of 10 cm was prepared, and a silicon stopper was inserted from the bottom to 3 cm. The soil was packed so hard that the soil did not fall even if it stood vertically from 3 cm to 5 cm from the bottom. Next, each sample granule was packed from the top of the glass tube with a width of 1 cm, and a silicon stopper was inserted from the top until it was in contact with the top surface of the sample granule. Next, with the bottom facing up, the bottom silicon plug was removed, 25 test insects were released, and a small wooden stick was inserted so that the bottom and soil were in contact with the wooden stick. The wooden stick was stabbed into the soil by about 5 mm. The bottom opening was covered with aluminum foil and fixed with cellophane tape. Next, with the bottom part facing down, the upper silicon stopper was removed, 6 mm square filter paper was placed on the granular carrier, and the upper opening was covered with aluminum foil. The glass tube set in this manner was allowed to stand vertically, and after one week, it was investigated whether or not the test insect penetrated the layer of the test granule. The test was repeated three times.
(5) Test results: Table 2 shows the results.

From Table 2, the penetration preventing effect was recognized in any granular carrier. However, permethrin and ciphenothrin, which are pyrethroid insecticides, have a low mortality rate and are inferior in terms of controlling termites. On the other hand, a non-repellent fipronil, chlorfenapyr, and clothianidin-containing granular carrier showed 100% excellent lethal effect.

Hereinafter, the present invention will be described with reference to formulation examples, but the present invention is not limited to these formulation examples.
Formulation Example 1
Pumice made by Ishikawa Light Industry Co., Ltd. (Ishikawa Light) was divided into particles having a maximum particle size of 3 mm or more and 8 mm or less using a sieve to obtain a granular carrier for termite control.
Formulation Example 2
A commercially available pumice stone (described above) having a longest particle size of 1 mm or more and less than 3 mm and 3 mm or more and 8 mm or less was mixed at a weight ratio of 1: 3 to obtain a granular carrier for termite control.
Formulation Example 3
A commercially available flowable preparation containing 21.4% chlorfenapyr (as described above) is diluted 21.4 times with water to make a 1% diluted solution, and 10 parts by weight of this liquid is evenly sprayed on 100 parts by weight of the carrier of Preparation Example 1 And air-dried to obtain a granular carrier for termite control containing 0.1% of chlorfenapyr.
Formulation Example 4
A commercially available flowable preparation containing 21.4% chlorfenapyr (as described above) is diluted 21.4 times with water to make a 1% diluted solution, and 10 parts by weight of this liquid is evenly sprayed on 100 parts by weight of the carrier of Preparation Example 2 And air-dried to obtain a granular carrier for termite control containing 0.1% of chlorfenapyr.

The present invention is likely to be widely adopted as a method for protecting houses and the like from termite damage, instead of the conventional liquid spraying process or granule spraying process.

Claims (3)

Less than 50 parts by weight of a granular carrier having a longest particle diameter in the range of 3 mm to 8 mm, or a granular carrier having a longest particle diameter in the range of 1 mm to less than 3 mm. A termite control method characterized by using a granular carrier mixed in the range described above. The granular carrier according to claim 1 contains 0.001% by weight or more and 5% by weight or less of one or two or more catinoid insecticides, phenylpyrazole insecticides, oxadiazine insecticides and / or chlorfenapyr. Termite control method characterized by using a granular carrier. The granular carrier according to claim 1 or 2 is laid down to a thickness of 1 cm or more and 20 cm or less in a portion where termites may penetrate from the underground to the ground surface, and a termite penetration preventing layer is formed. Termite control method.