JPH09227309A - Termite control agent - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a termite controlling agent showing a termite exterminating effect at a low dose. A termite control agent containing 4-bromo-2- (4-chlorophenyl) -1- (ethoxymethyl) -5- (trifluoromethyl) pyrrole-3-carbonitrile as an active ingredient.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to 4-bromo-2-
(4-chlorophenyl) -1- (ethoxymethyl) -5
The present invention relates to a termite control agent containing-(trifluoromethyl) pyrrole-3-carbonitrile.

[0002]

2. Description of the Related Art Termites are harmful to buildings and trees, and to concrete as well as wood products as well as wood. Conventionally, as a termite control agent, chlordane, organochlorine insecticides such as dieldrin and fenitrothion, phoxime,
Organic phosphorus insecticides such as chlorpyrifos have been used. However, organochlorine insecticides are prohibited from use due to problems such as toxicity, residual toxicity, and environmental pollution.Organophosphorus insecticides also have many problems in terms of toxicity, stability, residual effect, etc. There has been a demand for the development of new termite control agents.

Further, 4-bromo-2- (4-chlorophenyl) -1- (ethoxymethyl) -5- (trifluoromethyl) pyrrole-3-carbonitrile (Japanese Patent Application Laid-Open No. 1-111)
No. 04042) is known as an acaricide, but is not disclosed for termites.

[0004]

DISCLOSURE OF THE INVENTION The present invention intends to solve the problems of conventional termite agents and to provide a termite control agent which is excellent in safety, stability, termite control effect and residual effect. To do.

[0005]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that 4-bromo-
2- (4-chlorophenyl) -1- (ethoxymethyl)
The inventors have found that -5- (trifluoromethyl) pyrrole-3-carbonitrile has low toxicity and high activity against termites at a low dose, and thus completed the present invention.

That is, the gist of the present invention is 4-bromo-2-
(4-chlorophenyl) -1- (ethoxymethyl) -5
A termite control agent is characterized by containing-(trifluoromethyl) pyrrole-3-carbonitrile.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
The termite control agent of the present invention [hereinafter, referred to as chlorfenapyr. Chlorphenapyr is the generic name for 4-bromo-2- (4-chlorophenyl) -1- (ethoxymethyl) -5- (trifluoromethyl) pyrrole-3-carbonitrile. ] In an amount of 0.1 to 90% by weight.

The dosage form of the termite controlling agent of the present invention is as follows:
Various agents such as oils, emulsions, wettable powders, water solutions, powders and aerosols can be used depending on the properties of the control agent and the purpose of use, but oils and emulsions are generally used. Any formulation can be prepared according to a conventional method. Solid carriers include clays (eg kaolin, bentonites, acid clay, etc.), talc (eg talc, etc.), silicas (eg diatomaceous earth, silica sand, mica, synthetic silicates, synthetic highly dispersed silica). Etc.), pyrophyllite, pumice stone, inorganic mineral powder such as sand, and the like. These may be used alone or in the form of a mixture of two or more kinds.

As the liquid carrier, water, alcohols (eg methyl alcohol, ethyl alcohol, ethylene glycol etc.), ketones (eg acetone, methyl ethyl ketone, cyclohexane), ethers (eg ethyl ether, dioxane, tetrahydrofuran), Cersolve, etc.), aromatic hydrocarbons (eg toluene,
Xylene, benzene, solvent naphtha, cyclohexane, methylnaphthalene, etc.), aliphatic hydrocarbons (eg kerosene, kerosene, etc.), esters, nitriles, etc. can be used, but these can be used alone or in combination of two or more. You may use it in the form of the mixture of.

Next, examples of the surfactant include, but are not limited to, alkyl sulfates, alkylaryl sulfonates, polyethylene glycol ethers, and polyhydric alcohol esters.
These may be used alone or in the form of a mixture of two or more kinds. Other suitable adhesives and dispersants such as casein, gelatin, starch, alginic acid, CMC (carboxymethyl cellulose), gum arabic, agar, and polyvinyl alcohol are used, but the present invention is not limited thereto.

The termite control agent of the present invention is applied to the soil or the habitat of termites, and also removes wood materials such as trees, fences, piles, sleepers, buildings such as shrines, houses, barns and factories from termites. In order to protect it, it is not only treated on the soil surface under these or under the floor or on the soil around these or under the floor, but also wood products such as plywood, lumber products, particle boards, half boards, coated electric wires, sheets, etc. It can also be used for vinyl products. Further, the present invention also includes a mode in which prophylactic treatment is applied to a place where the occurrence of termites is predicted in advance.

[0012]

EXAMPLES Next, the effects of the present invention will be specifically described by showing Examples and Test Examples, but the present invention is not limited to the following Examples unless it exceeds the gist. <Example 1> 0.3 parts of chlorfenapyr was dissolved in kerosene to make 100 parts as a whole to obtain an oil agent for controlling termites. <Example 2> 5 parts of chlorfenapyr, 5 parts of Newcargen 1070 (surfactant, manufactured by Takemoto Yushi-Seiyaku Co., Ltd., trademark) and 90 parts of xylene were added and well mixed by stirring to obtain a termite control agent emulsion. <Test Example 1> An acetone solution of chlorfenapyr adjusted to a predetermined concentration was dropped onto the insect body of the termite worker ant using a microsyringe. Then, a filter paper containing water was given and stored in a thermostatic chamber at 25 ° C., and the number of dead insects after 24 hours and the degree of feeding damage of the filter paper were compared with the control drug. The number of test insects was 30 at each concentration step. The results are shown in Table 1. As a control drug, fenitrothion [O, O-dimethyl-
O- (3-methyl-4-nitrophenyl) thiophosphate (generic name) and chlorpyrifos (generic name of O, O-dimethyl-O-3,5,6-trichloro-2-pyridylphosphorothioate) were used. In addition, the eating damage degree in the table is as follows:-: no eating damage, +: mild eating damage, ++: considerable eating damage around the filter paper, and +++: severe eating damage over the entire surface.

[0013]

[Table 1]

<Test Example 2> The emulsion obtained in Example 2 was diluted 200 times with tap water, and 0.25 mg as an active ingredient amount of chlorfenapyr on the surface of a lauan piece (2 x 2 x 2 cm).
/ M ² . The control drug was also prepared in the same manner as in Example 2 and applied at the same concentration. Filter paper containing this test piece and water
In addition to the individual, store in a constant temperature room at 25 ° C, and after 24 hours, 4
The number of dead insects was examined after 8 hours and 72 hours. Table 2 shows the results.

[0015]

[Table 2]

[0016]

EFFECTS OF THE INVENTION By using chlorfenapyr against termites or termite living environments, it exhibits high activity for controlling termites with a low dose.

Claims (2)

[Claims] 1. A termite control agent comprising 4-bromo-2- (4-chlorophenyl) -1- (ethoxymethyl) -5- (trifluoromethyl) pyrrole-3-carbonitrile. 2. Containing 0.1 to 90% by weight of 4-bromo-2- (4-chlorophenyl) -1- (ethoxymethyl) -5- (trifluoromethyl) pyrrole-3-carbonitrile. The termite control agent according to claim 1.