JPS6011001B2 - Termite control agent and its usage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a termite control agent and a termite control method using the agent.

Termites are pests that often live in the soil, and are widely distributed in the Kanto region and westward, feeding on trees, houses, etc., and the damage caused by them, including damage to buildings, is said to reach tens of billions of yen annually. Its control has become an extremely important issue.

Currently, chemical treatment to prevent damage to buildings, etc. is usually carried out in the following manner. That is, ■Build a building (
Thoroughly soak the entire ground surface (or an existing one) with an emulsion of a drug (for example, chlordane). - Dig out the ground adjacent to the building's foundation or outer wall to a depth of about 30cm and 30cm, inject the drug into it, and mix the drug into the buried soil. ■Oil agent containing active ingredients for construction wood,
Soak in emulsifier, etc. ■Applying, spraying, or injecting chemicals to pillars, walls, etc. during or after construction. Among these treatment methods, the present invention provides an improved method that can be applied to the treatment of ± warmth with chemicals as in (1) and (2).

Termites often build nests in the soil, and they build paths (ant trails) in the soil to reach buildings and damage the wood, so to prevent damage, it is necessary to apply a layer of chemicals in the soil. form,
It is most suitable to use it as protection.

However, there are some problems with soil treatment at night. First, chemical treatment is often carried out after termite damage is recognized after construction, and pest control workers apply concentrated chemical solutions in small spaces (for example, an emulsion containing 50% chlordane, 3 pep in water). It had to be diluted and sprayed 5 times a day), and for this purpose it was necessary to wear personal protective equipment such as glasses, masks, and gloves. However, because they work in small spaces such as under the floor, their work clothes are often drenched in a mist of chemical solutions, which can lead to skin irritation or, in severe cases, poisoning due to inhalation of the chemicals or solvents. . Second, because the chemical solution does not spread sufficiently into the soil, it may not reach the depth where termites live, or the treatment notification may not be complete, creating gaps that can become passageways for termites. Termites often penetrate through even the smallest untreated layer to cause damage. The inventors of the present invention have obtained new knowledge as a result of various studies on improving conventional termite control methods. The present invention provides a new termite control agent, and also provides a method for using the termite control agent. That is, the present invention provides an effective termite control ingredient and an anionic surfactant or an anionic surfactant and an organic solvent as a soil penetration improver, which are carried on a granular carrier or a powdered carrier. This invention relates to a granular termite control agent which is characterized by being granular and has excellent warm and deep penetration. The present invention also relates to a method of using the pesticidal agent, and the method of applying the pesticidal agent to the surrounding surface or soil of an object or building to be protected from termite damage, or in the soil and/or the subfloor of the building. It is characterized by sprinkling water on the treated area after treating the surface or soil. The termite-controlling active ingredient in the present invention is not particularly limited, and may be any termite-controlling substance as long as it has a termite control action.

For example, the following may be mentioned: chlordane, hebutachlor, deirdrin. The anionic surfactant used as a soil penetration improver in the present invention facilitates the separation of the active ingredient from the carrier and the permeation of the active ingredient into the soil, allowing the active ingredient to diffuse into the soil. It is further strengthened by coexistence.

The type of anionic surfactant that can be used is not particularly limited, so for example, ammonium salts of ether sulfate (for example, polyoxyethylene nonyl phenyl ether ammonium sulfate, polyoxyethylene alkyl ether ammonium sulfate, etc.) , polyoxyethylene alkyl sulfate type, polyoxyethylene alkyl phosphate type, alkyl sulfate type, alkylaryl sulfate type, alkyl succinic acid sulfate type (e.g. dialkyl sulfosuccinate)
, a quaternary ammonium type, or a mixture of two or more of these. In the present invention, anionic surfactants can also be used in combination with nonionic and cationic surfactants. The amount of surfactant used is 100 parts of the active ingredient (parts represent parts by weight).
The amount is generally selected from 5 to 20 parts, preferably 20 to 10 parts. In the present invention, an organic solvent may be added as necessary to improve the separation of the active ingredient from the carrier and the permeability of the active ingredient by the surfactant.

Therefore, the present invention includes not only the use of an anionic surfactant alone as a soil penetration improver but also the use of an anionic surfactant together with an organic solvent. Organic solvents include those that can serve as a solvent for the active ingredient and those that can disperse or dissolve the active ingredient using a surfactant without having a solvent. The use of organic solvents is particularly advantageous when the active ingredient is a solid or a highly viscous liquid. In the present invention, solvents commonly used in agricultural chemical emulsions can be used as the organic solvent. For example, the following may be mentioned: xylene, kerosene, methylnaphthalene, etc. The amount of the organic solvent used can be appropriately determined from 0 to 20 parts per 10 parts of the active ingredient. The carrier material that can be used in the present invention is not particularly limited.

However, in order to increase the amount of active ingredients supported, those with high oil absorption are preferred. Examples of possible carriers include: pumice, bentonite, zeolite, corn cob, wood chips, etc. crushed into granules; clay, talc, bentonite, calcium carbonate, diatoms.
, magnesium sulfate, pumice, etc., or a mixed powder of two or more of these: Compression molding or extrusion granulation of these into granules, or crushed granules, etc. In order to produce the granules of the present invention, the above granular carrier, active ingredients, penetration improvers, and other adjuvants that may be added as desired are prepared according to a conventional method (for example, using a V-type mixer,
Mix (using a Nauta mixer) and separate if necessary to make a product.

Alternatively, various ingredients are added using a powder carrier and the product is then compression molded, or the molded product is further crushed and divided into stripes to create a product. Alternatively, instead of compression molding, the mixture is kneaded in the presence of an appropriate amount of water, extruded and granulated, dried, and then separated into granules if necessary to produce a product. The size of the granule is 50 to 20,000.
The particle size distribution is preferably selected from a range of 65 to 2000 μm. The shape may be any shape, including spherical, cylindrical, circular, amorphous, and other shapes called tablets. The granular agent of the present invention is treated around or in the vicinity of an object or structure to be protected from termite attack (in this case, the term ``surrounding'' does not necessarily mean the surrounding area; (This should be understood as a scope that can be changed depending on the case.) Therefore, the granular agent of the present invention can be applied to wooden objects such as trees, wooden fences, wooden fences, stakes, railroad ties, etc., to the surfaces or surrounding soil of buildings such as shrines, temples, houses, barns, and factories. However, in order to protect buildings, it is even more effective to prevent termites from living in the floors. Therefore, the granular agent of the present invention is applied to the underfloor surface of the building to be protected or into the soil. Treatment methods include scattering the granules directly on the soil surface, thoroughly mixing the soil surface with a digger, or digging a trench around the affected area and scattering the granules into the trench and mixing with the buried soil as desired. includes. However, according to the findings of the present inventors, the effects expressed by the above treatment method are maximized by sprinkling water on the chemically treated area, so it is advantageous to sprinkle water on the treated area after the chemical treatment. It is. The amount of water normally used for diluting the emulsion is sufficient. Surprisingly, the active ingredient diffuses deeper and wider into the soil than in the case of emulsion treatment, and exhibits a significantly higher insecticidal effect with the same amount of active ingredient. This is because in the case of emulsions, the surfactant must be selected from the viewpoint of emulsion stability, whereas in the case of the present invention, it can be selected from the viewpoint of optimizing soil penetration. considered to be a thing. At first glance, the process of sprinkling water after chemical treatment may seem like a double effort, but unlike spraying a chemical emulsion, there is no need to pay attention to the quantitative nature of the spraying, and there is no need to use a special sprayer. You can also use a method such as connecting a hose and sprinkling water, so overall it is a very easy and safe way to work.

Adequate watering also helps to flood ant trails. The method of the invention is therefore particularly advantageous when carrying out pest control operations under the floors of existing buildings. Also, watering operations in open areas can be replaced by rainfall. In other words, when the granules of the present invention are applied to an open area, the trouble of watering can be saved by applying the treatment before or during rain. According to the present invention, termites can be effectively controlled simply and safely without touching a chemical solution or inhaling a mist, as in conventional emulsion or oil treatments.

Compared to the conventional method, which requires protecting exposed body parts with glasses, masks, gloves, work clothes, etc., the present invention is a granular agent, so it can be sprayed with bare hands. Work efficiency is significantly improved.

Particularly, work in narrow spaces such as under the floor becomes much easier and safer. Next, some test examples will be given to prove the effectiveness of the present invention.

In addition, parts indicate parts by weight. same as below. Test Example 1 <Sample> ■ Granule agent A of the present invention 1 part of chlordane, 28 parts of polyoxyethylene nonyl phenyl ether ammonium sulfate, 0.3 parts of dialkyl sulfosuccinate, 2 parts of kerosene. After mixing, 84.6 parts of pumice grains (295 to 9 mm) were impregnated with the mixture.

■ Granules of the present invention 8 The capital of chlordane 1, dialkyl sulfosuccinate 0.3
1 part, 2 parts of polyoxyethylene alkyl ether ammonium sulfate, 82.5 parts of clay, and 5 parts of calcium lignin sulfonate were mixed with an appropriate amount of water and extruded to form granules with 500 to 1000 mounds. And so.

■ Comparative Example A Chlordane 1 base, kerosene 2. After mixing Isobe, add pumice grains (2
95-Satoshi 9〃) 87.7 parts were impregnated.

(2) Comparative Example B An appropriate amount of water was added to 1 $ part of chlordane, 85.0 parts of clay, and 5 parts of calcium lignosulfonate, and the mixture was bran and extrusion granulated to obtain granules with an OA of 500 to 100 OA. ■
Comparative Example C Commercially available emulsion containing 50% chlordane.

<Test method> Put the Sanji 500ml through a 32 mesh pith into a 11G-2 glass filter, add 50ml of water, let the Sanji settle to form a uniform soil layer, and then add 0.0% of chlordane. Add a sample equivalent to 1 saw, separate the water to the bottom of the filter,
Chlordane in the water was extracted with chloroform, quantified using a gas chromatograph, and the ratio of the amount permeated through the soil layer to the input amount was determined.

<Test Results> This shows that the granules of the present invention have excellent soil permeability.

Test Example 2 <Sample> ■ 88 parts of pumice grains with a particle size of 295 to 833 A were prepared by mixing 1 part of the granulating agent Diazinon of the present invention, 2 parts of a mixture of an alkylaryl sulfonate and a polyoxyethylene alkylaryl ether. impregnated with.

■ Comparative Example D Diazinon 1 anchor group was mixed with particle size 295-833 pumice particles 9
Gobun'kosha was soaked.

■ Comparative example E Commercial emulsion containing 40% diazinon.

<Test method> According to Test Example 1, the soil layer permeability of diazinon was observed.

<…,, Test Example 3 Samples> Samples of ■, ■, ■ of Test Example 1 <Test method> A polyvinyl chloride cylinder with an inner diameter of 1 mm and a depth of 5 mm
Fill 4k9 of Kawachinagano Hongtou soil through the side nodes to form a soil column with a depth of 40 skins.

The top surface of this column was treated with a sample equivalent to 84 g/a of chlordane (for samples ① and ② granules, water equivalent to 5 ml was sprinkled after several grains, and for sample ② emulsion, 5 ml of water was sprinkled). / was diluted with an appropriate amount of water and sprayed). Two hours after the completion of the treatment, the soil column was divided into three layers from the top and the boundary soil (approx.
(skin thickness) was placed in a petri dish and 20 termite worker ants were released into the petri dish, and the mortality rate was examined after 12 days. From these results, it can be seen that the effect of the granules of the present invention reaches deeper into the soil compared to conventionally used emulsions.

Next, Examples of the present invention will be described, but it goes without saying that the present invention is not limited thereto.

Example 1 1 part of chlordane, 2 parts of kerosene, 3 parts of nonionic surfactant and 0.3 part of anionic surfactant were blended, and this was dry-molded with 84.5 parts of magnesium sulfate and crushed to a particle size of 5.
A granular agent is prepared by impregnating a granular carrier at a temperature of 00 to 1000 r.

To control termites, this chemical is applied to objects to be protected, on the surface or in the soil around buildings, on the surface under floors of buildings, or in the soil, and then used by sprinkling with water. Example 2 16 parts of chlordane, 4 parts of BPMC, 3 parts of kerosene, and 4 parts of a nonionic/anionic mixed surfactant are mixed.

Claims (1)

[Scope of Claims] 1. An anionic surfactant or an anionic surfactant and an organic solvent as a termite-controlling active ingredient and its soil penetration improving agent are supported on a granular carrier or are supported on a powdery carrier to form a granular product. A granular termite control agent with excellent soil penetration ability. 2. Granular termite particles prepared by supporting a termite-controlling active ingredient and an anionic surfactant or the surfactant and an organic solvent as a soil penetration improver on a granular carrier or a powdered carrier. The method is characterized in that the control agent is applied to the soil surface or soil around an object or structure to be protected from termite damage, or/and to the subfloor surface or soil of the structure, and then water is sprinkled on the treated area. How to use the termite control agent.