JPH07187913A - Soil-treating agent for exterminating termite - Google Patents

Abstract

PURPOSE:To obtain a termite-controlling soil-treating agent containing easily available dibenzyl ether, exhibiting excellent extermination effect on termite, having high safety and causing little environmental pollution. CONSTITUTION:This termite-controlling soil-treating agent contains dibenzyl ether and optionally other termite-exterminating agent such as phoxim, cyfluthrin and monochloronaphthalene and an antioxidant such as 2,6-di-t-butyl-4- methylphenol or an alkyldiphenylamine. The soil-treating agent can be used in the form of emulsion, granule or powder. The agent causes little environmental pollution, is safe to the worker and the client and has excellent economy. Emulsion of the treating agent can be prepared by adding a surfactant and diluting with a diluent such as benzene, hexane and methanol.

Description

Detailed Description of the Invention

[0001]

[Industrial applications]

The present invention relates to a novel termite insecticidal soil treatment agent, and more particularly to a termite insecticidal soil treatment agent which has an excellent insecticidal effect against termites, is highly safe, and is less likely to cause environmental pollution.

[0003]

2. Description of the Related Art Conventionally, termite-killing agents have been organochlorine-based,
Termite-killing agents such as organic phosphorus-based, carbamate-based, pyrethroid-based, and heavy metal salts are known, and these are usually wood injection treatments such as pressure injection or surface treatment, emulsions and granules directly applied to wood. , It is applied as a soil treatment that is applied to the soil as a powder. Both soil treatment and xylem treatment are indispensable for controlling termites, but the soil treatment agent used for soil treatment takes the form of emulsion, granules, etc., so it is a pressurized injection agent used for xylem treatment. Compared with the above, it is effective in that large equipment and drying time of wood are not required, and is more effective in odor and safety than the surface treatment agent in the form of an oily agent. Soil treatment is mainly used to prevent damage of wooden structures by termites, and for such applications, for example, organochlorine termite-killing agents such as dieldrin, aldrin and chlordane have been used. However, the use of these organochlorine termite killing agents causes environmental pollution due to the increase in the amount used and persistent decomposition, and their use is currently prohibited as a specified chemical substance in Japan.

[0004]

Therefore, in recent years, organic phosphorus, carbamate, and pyrethroid termite terminators having relatively low toxicity and little environmental pollution have been used. Examples of the organic phosphorus termite-killing agents include oxime, chlorpyrifos, fenitrothion, and the like, examples of carbamate-type termite-killing agents include bassa, propoxa, and the like, and pyrethroid-type termite-killing agents, permethrin, tralomethrin, bifenthrin, and the like. Cyfluthrin, decamesulin, etc. are used. However, organic phosphorus-based and carbamate-based termite-killing agents have no problem in terms of efficacy, but have a cholinesterase activity-inhibiting effect on workers and thus have a safety problem. Moreover, since the pyrethroid termite-killing agent has a poor price-specific performance, it tends to be used in the minimum necessary amount when used in combination with a synergist, which causes a problem in construction. As described above, the termite-killing soil treatment agent has problems in safety for workers and owners, concentration of the agent used, economic efficiency, and sustainability of efficacy, and none of the conventional techniques is satisfactory.

[0005]

[Means for Solving the Problems] As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that dibenzyl ether exhibits insecticidal activity against termites as a soil treatment agent, and further research is conducted. The present invention has been completed. That is, the present invention relates to a termicidal soil treatment agent containing dibenzyl ether. The dibenzyl ether used in the present invention is a compound that is obtained as a by-product when benzyl chloride is hydrolyzed to produce benzyl alcohol and is used as a dye, a fragrance, etc., and is easily obtained as a commercial product. be able to. Dibenzyl ether not only has termicidal properties but also has no cholinesterase activity inhibitory effect. For example, oral acute toxicity to rats is 2500 mg / kg, which is comparable to that of conventional termite control agents against mammals. It has excellent properties that it is a compound that does not contain heavy metals, sulfur, and nitrogen, and that it has very few problems of environmental pollution. The dibenzyl ether of the present invention can be used in all forms of ordinary soil treatment agents such as emulsions, suspensions, powders, granules, high foaming agents, microcapsules or microspheres. It is preferably used as an emulsion, powder or granule, and particularly preferably used as an emulsion.

When the termite-killing soil treatment agent of the present invention is used as an emulsion, for example, dibenzyl ether is diluted with a liquid diluent, and a surfactant is added for the purpose of dispersion and wetting. Examples of the liquid diluent include organic solvents such as aromatic solvents such as benzene, xylene, toluene, ethylnaphthalene and phenylxylylethane, and aliphatic solvents such as paraffins, hexane, dichloromethylene, chloroethylene and chloroform. , Cyclohexane,
Alicyclic solvents such as cycloheptane, alcohols such as methanol, ethanol, propanol, butanol and cyclohexanol, and glycols such as ethylene glycol and propylene glycol. -Ruber ether type solvents, ketone type solvents such as acetone, methyl ethyl ketone and methyl isobutyl ketone, ester type solvents such as ethyl acetate and di-2-ethylhexyl adipate, water, 2-ethylhexyl phenyl phosphate and the like. Can be mentioned. These are used alone or as a mixture of two or more kinds. Aromatic solvents, which are high boiling point solvents, are preferred from the viewpoints of environmental properties and solubility. As the surfactant, known surfactants such as soaps, nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, and polymeric surfactants can be used. it can. Among them, nonionic surfactants and anionic surfactants are preferably used. Examples of the nonionic surfactants include polyoxyalkylene aryl phenyl ethers, polyoxyethylene nonyl phenyl ethers, ethylene oxide / propylene oxide block copolymers, and the like. Examples of the anionic surfactants include alkylbenzene sulfonic acid metal salts, alkylnaphthalene sulfonic acid metal salts, polycarboxylic acid type surfactants, dialkylsulfosuccinic acid ester metal salts, polyoxyethylene distyrenated phenyl ethers.
Examples thereof include tersulfate ammonium salt, lignin sulfonic acid metal salt, lignin sulfonic acid metal salt, and the like, and examples of the metal salt include sodium salt and potassium salt.

These proportions are 5 to 95% by weight, preferably 20 to 9% by weight of dibenzyl ether based on the total composition of the emulsion.
0% by weight, 93% by weight or less of liquid diluent, preferably 76
Weight% or less, 1 to 20% by weight of nonionic surfactant, preferably 2 to 10% by weight, 1 to 2 of anionic surfactant
It is used in an amount of 0% by weight, preferably 2 to 10% by weight.
When the termite-killing soil treatment agent of the present invention is used as a granule or powder, for example, dibenzyl ether is diluted with a liquid diluent and impregnated into a carrier. As the liquid diluent, the above-mentioned liquid diluent can be used and is appropriately selected according to the application. Preferably, an aromatic solvent that is a high boiling point solvent is used. Examples of the carrier include ordinary solid carriers, for example, clays such as fine powder clay, talc such as talc powder and wax stone powder, mineral powders such as silicas such as pumice, diatomaceous earth powder and mica powder, carbonic acid. Calcium, sulfur powder, urea powder and the like can be mentioned. Usually, the particle size of these is about 500 to 3000 μm when used as a granule, and about 1 to 50 μm when used as a powder. These may be used alone or in combination of two or more, and clay and pumice are preferably used. These proportions are 0.01 to 50% by weight of dibenzyl ether, preferably 0.1 to 20% by weight, and 90% by weight or less of a liquid diluent with respect to the total composition of granules and powders.
It is preferably used in an amount of 50% or less, 10 to 99.9% by weight of the carrier, and preferably 50 to 99% by weight.

Furthermore, the termite-killing soil treating agent of the present invention may optionally contain a termite-killing agent other than dibenzyl ether and an antioxidant. Examples of termite-killing agents other than the dibenzyl ether include organic phosphorus-based termite-killing agents such as foxime, chloropyrifos, fenitrothion, pyridafenthion, isofenphos, and prothiophos, carbamate termite-killing agents such as bassa and propoxa, permethrin, Cyfluthrin, tralomethrin, fenvalerate, etofenprox, Hoe
-498 and other pyrethroid termites, imidacloprid, nitroguanidine compounds, wood termites such as monochloronaphthalene, 1,1,1,2,7,8,8,8
Examples include a potentiator such as octachloro-4-oxaheptanone, various antibiotic agents, and other active substances for agrochemicals such as other termite controlling active ingredients. These may be added alone or in combination of two or more, depending on the application,
Cyfluthrin, monochloronaphthalene, etc. are used. Examples of the antioxidant include 2,6-di-t-butyl-4-methylphenol and 2,2'-methylenebis [4-
Methyl-6-t-butylphenol] and other phenolic antioxidants, alkyldiphenylamine, N, N′-di-s-butyl-p-phenylenediamine and other amine antioxidants, and the like. These other termite-killing agents and antioxidants are, for example, 100 parts by weight of emulsions, granules, powders, etc., and other termite-killing agents are 0.05 to 100 parts by weight, preferably 0.1 to 80 parts by weight. , The antioxidant is 0.
It is used in the range of 1 to 20 parts by weight, preferably 0.2 to 10 parts by weight.

The termite-killing soil treating agent of the present invention is produced by a known method. For example, an emulsion can be usually produced by stirring and mixing using a high speed stirring type mixing tank. In the case of granules and powders, using a formulation device such as a coating pan, dibenzyl ether, a carrier, a liquid diluent, etc. are added and mixed, and a termite-killing agent is carried on a carrier to carry out impregnation. it can. The termites that are the target of the termite-killing soil treatment agent of the present invention are those that widely belong to the termite order (Isoptera) and cause damage that is recognized as termite damage, for example, termites of the family Termite (Coptotermes formosanus). ) And so on. The termite-killing soil treating agent of the present invention is applied by the same method as that for a normal soil treating agent. For example, the emulsion is diluted with tap water 2-90 times, preferably 10-60 times,
(Company) The termite-killing layer is formed on the soil, concrete, etc. by spraying it to the underfloor soil, soil concrete, outer circumference, etc. of a wooden building by the method specified by the Japan Shiori Countermeasure Association. For granules and powders, the above method is applied as it is.

[0010]

EFFECTS OF THE INVENTION The termite soil treatment agent of the present invention has excellent insecticidal activity against termites, high safety, and little risk of environmental pollution, ensuring safety for workers and owners. In addition, it has an effect of being excellent in economical efficiency.

[0011]

EXAMPLES The present invention will be specifically described with reference to the following examples. In the examples, “part” means “part by weight”. Example 1 90.0 parts of dibenzyl ether, 6.0 parts of polyoxyalkylene aryl phenyl ether, and 4.0 parts of metal salt of alkylbenzene sulfonic acid were mixed to obtain a termite-killing emulsion. Example 2 67.5 parts of dibenzyl ether, 22.5 parts of oxime,
Polyoxyalkylene aryl phenyl ether 7.0
And 3.0 parts of alkylbenzene sulfonic acid metal salt were mixed to obtain a termite-killing emulsion. Example 3 60.0 parts of dibenzyl ether, 30.0 parts of monochloronaphthalene, 6.0 parts of polyoxyalkylene aryl phenyl ether, and 4.0 parts of metal salt of alkylbenzene sulfonic acid were mixed to obtain a termite-killing emulsion. . Example 4 Dibenzyl ether 60.0 parts, polyoxyethylene nonylphenyl ether 6.0 parts, alkylbenzene sulfonic acid metal salt 4.0 parts Phenylxylylethane 30.0
The parts were mixed to obtain a termite-killing emulsion.

Example 5 80 parts of pumice having a particle size range of 577 to 1300 μm, 20 parts of dibenzyl ether and 3 parts of a xylene solvent were mixed using a mixing device and then dried to obtain termite-killing granules. Example 6 Using a mixing device, a particle size range of 3 to 15 μm
0 parts, 20 parts of dibenzyl ether and 3 parts of xylene solvent were mixed and then dried to obtain a termite powder. Example 7 Using a mixing device, 75 parts of pumice having a particle size range of 577 to 1300 μm, 20 parts of dibenzyl ether and 5 parts of oxime
Parts and 3 parts of xylene solvent were mixed and dried to obtain termite-killing granules. Example 8 Using a mixing device, 79.5 parts of pumice particles having a particle size range of 577 to 1300 μm, 20 parts of dibenzyl ether, 0.5 part of cyfluthrin, and 3 parts of xylene solvent were mixed and dried to obtain termite-killing granules. Obtained. Test Example 1 (Company) The test was carried out according to the Japan Wood Preservation Association Standard No. 11, 4.1. Contact test. To 3 g of quartz sand (passed through a 60-mesh sieve), 1 ml of a 1.5% BACTOAGAR solution was added and well mixed, to obtain treated quartz sand. The termite-killing emulsion prepared in Example 1 was diluted with distilled water and mixed with treated quartz sand. The concentration of each compound is
The weight was 50 ppm and 200 ppm with respect to the dry quartz sand. The quartz sand was prepared by adjusting the water content to about 5%. A dish (6 cm in diameter) that has been sterilized by dry heat in advance.
Then, 2 g of each of the treated quartz sand and the test quartz sand was formed, and a groove having a width of about 5 mm was formed in the center of the dish and spread on both sides. On these quartz sands, random termites (Coptot)
ermes formosanus) 10 worker ants were taken out of the nest and inserted. Put each dish in a container with water in the bottom,
Leave the container in a temperature-controlled room at a temperature of 28 ± 2 ℃ for 14 days,
The health status of the termites and the number of deaths were observed and recorded every 2 hours for 8 hours on the first day and every 24 hours for the second day and thereafter. The number of repetitions was 3. Table 1 shows the time required for 100% of the termites to fall and die.

[Table 1] [Table 1] shows that the termite soil treatment agent of the present invention has sufficient sacrifice.

Test Example 2 (Company) The test was carried out in accordance with the Japan Wood Preservation Association Standard No. 13, 3.1. Indoor test. Quartz sand (passed through a 20-mesh sieve) was dried at a temperature of 60 ± 2 ° C. until a constant weight was obtained, and 12 g of this was added with 3 g of water to obtain a test untreated quartz sand. The test-treated quartz sand was prepared as follows.
The termicidal emulsion prepared in Example 4 was diluted with distilled water,
It was mixed with 12 g of quartz sand (passed through a 20-mesh sieve) which had been dried to a constant weight at a temperature of 60 ± 2 ° C. and cooled. The concentration of dibenzyl ether was 100 ppm and 200 ppm by weight with respect to the dry quartz sand. The test container consisted of two glass cylinders having an inner diameter of about 5 cm and a length of about 10 cm, and a glass tube having an inner diameter of about 1.5 cm and a length of about 10 cm at a position of about 2 cm from the bottom surface (a transparent portion excluding the rubbing portions at both ends). It had a length of 5 cm and was graduated every 5 mm). About 60 g of untreated quartz sand adjusted to have a water content of about 25% was placed in one of the glass cylinders of the test container that had been dried and sterilized in advance, and about 3 g of crushed red pine pieces was placed in the other. The above-mentioned treated and untreated quartz sands were packed in the central transparent portion of the glass tube, and connected to the glass cylinder. Into a glass cylinder containing untreated quartz sand, 200 termites and 20 soldiers were placed in the termites taken out of the nest. The test container was allowed to stand in a thermostatic chamber at a temperature of 28 ± 2 ° C. and a humidity of 70% or more for 3 weeks. The number of repetitions was 3. After 3 weeks, the progress of termites on the treated and untreated quartz sand in the glass cylinder was observed, and the degree of perforation was determined according to the following criteria. Porosity 0: No perforation was observed in the sample quartz sand. Perforation degree 1: Perforation distance less than 1 cm Perforation degree 2: Perforation distance less than 2 cm Perforation degree 3: Perforation distance less than 3 cm Perforation degree 4: Perforation distance less than 4 cm Perforation degree 5: Perforation distance 4 cm or more The results are shown in [Table 2].

[Table 2] [Table 2] shows that the termite-killing soil treating agent of the present invention has a sufficient penetration inhibiting activity.

Test Example 3 (Company) The test was carried out according to the Japan Wood Preservation Association Standard No. 13, 3.1. Indoor test. Quartz sand (passed through a 20-mesh sieve) was dried at a temperature of 60 ± 2 ° C. until a constant weight was obtained, and 12 g of this was added with 3 g of water to obtain a test untreated quartz sand. The test-treated quartz sand was prepared as follows.
The termite-killing granules prepared in Example 5 were treated at a temperature of 60 ± 2 ° C.
The mixture was mixed with 12 g of quartz sand (passed through a 20-mesh sieve) that had been dried and cooled to a constant weight in. The concentration of dibenzyl ether is 10 by weight based on dry quartz sand.
It was set to 0 ppm and 200 ppm. The test container has an inner diameter of about 5
cm, length of about 10 cm, two glass cylinders, a glass tube with an inner diameter of about 1.5 cm and a length of about 10 cm at a position of about 2 cm from the bottom (the length of the transparent part excluding the rubbing parts on both ends is 5
cm, and graduated every 5 mm). About 60 g of untreated quartz sand adjusted to have a water content of about 25% was placed in one of the glass cylinders of the test container that had been dried and sterilized in advance, and about 3 g of crushed red pine pieces was placed in the other. The above-mentioned treated and untreated quartz sands were packed in the central transparent portion of the glass tube, and connected to the glass cylinder. Into a glass cylinder containing untreated quartz sand, 200 termites and 20 soldiers were placed in the termites taken out of the nest. Test the container at a temperature of 28
It was allowed to stand in a thermostatic chamber at ± 2 ° C and a humidity of 70% or more for 3 weeks. The number of repetitions was 3. After 3 weeks, the progress of termites on the treated and untreated quartz sand in the glass cylinder was observed, and the degree of perforation was determined according to the following criteria. Porosity 0: No perforation was observed in the sample quartz sand. Perforation Degree 1: Perforation Distance Less than 1 cm Perforation Degree 2: Perforation Distance Less than 2 cm Perforation Degree 3: Perforation Distance Less than 3 cm Perforation Degree 4: Perforation Distance Less than 4 cm Perforation Degree 5: Drilling Distance 4 cm or More The results are shown in [Table 3].

[0015]

[Table 3] From Table 3, it can be seen that the termite-killing soil treatment agent of the present invention has a sufficient penetration inhibiting activity.

Claims (7)

[Claims] 1. A termite-killing soil treatment agent comprising dibenzyl ether. 2. The termite-killing soil treatment agent according to claim 1, further comprising a termite-killing agent other than dibenzyl ether. 3. The termite-killing soil treatment agent according to claim 1, wherein the termite-killing agent other than dibenzyl ether is an organophosphorus termite-killing agent. 4. The termite-killing soil treatment agent according to claim 1, wherein the termite-killing agent other than dibenzyl ether is a pyrethroid termite-killing agent. 5. The termite-killing soil treating agent according to claim 1, wherein the soil treating agent is an emulsion. 6. The termiticide soil treatment agent according to claim 1, wherein the soil treatment agent is a granule. 7. The termite-killing soil treating agent according to claim 1, wherein the soil treating agent is a powder.