JPS6233104A - Termite controlling agent - Google Patents

Abstract

PURPOSE:The titled controlling agent, containing guaiacol or a hydroxybenzene derivative, capable of acting on antennae which are important organs of termites, browning and severing the antennae to destroy the living function with low toxicity to vertebrates without polluting natural environment. CONSTITUTION:A termite controlling agent containing a compound expressed by the formula (R<1> is lower alkenyl; R<2> and R<3> are the same or different H, methyl or lower acyl) as an active constituent. Specific examples of the compound expressed by the formula include 3,4-dimethoxy-1-propenylbenzene, 4- hydroxy-3-methoxy-1-propenylbenzene, etc. In use, the active constituent may be directly used, but normally diluted with water or suitable organic solvent and used as an aqueous solution or oil or an emulsifying agent, stabilizer, etc., are added thereto and used as a powder, etc. The content of the active constituent is about 0.1-20wt% for the solution and powder.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a termite control agent containing guaiacol or a hydroxybenzene derivative as an active ingredient.

(Prior Art) The damage caused by termites is immeasurable, and all cellulose hostages become targets for feeding, including not only wooden buildings, but also living water, sugar cane, and clothing scraps 11M. Furthermore, the damage caused by termites is not limited to these, but also damages non-woody materials such as underground cables, plastic buckets, and concrete.

Conventional drugs against this type of pest include, for example, chlordane (1
,2,4,5,6,7,8,8-octachlor-2,3
, 3a, 4,7,7a-hexahydro-4,7-methano-IH-indene), etc., but they are often used in the soil or on foundations, so they are highly safe for moving animals. It has to be something.

(Problems to be Solved by the Invention) An object of the present invention is to provide a termite control agent that has an excellent termite control effect and is highly safe for termites.

(Means for Solving the Problems) The present invention is based on the general formula (wherein R1 is a lower alkenyl group, and R2 and R3 are the same or different and are hydrogen, a methyl group, or a lower acyl group)
This invention relates to a termite control agent containing the compound represented by as an active ingredient.

In the above general formula (1), preferable examples of the lower alkenyl group include allyl group and propenyl group, and preferable examples of the lower acyl group include acetyl group. Representative examples of the compound represented by the general formula (1) include 3,4-dimethoxy-1-flobenylbenzene, 4-
Examples include hydroxy-3-methoxy-1-propenylbenzene, 4-7 lylguaiacol (eugenol), 4-7 lylveratrol, acetyl eudenol, and the like. The compound of general formula (1) can be used alone, but it can also be used as a mixture of two or more. Although the compound of general formula (1) can be used as it is, it is usually diluted with water or an appropriate organic solvent, and then
It may be used as an aqueous solution or an oil solution, or it may be used in dosage forms such as emulsions, powders, granules, aerosols, etc. by adding emulsifiers, penetrants, stabilizers, fillers, binders, propellants, etc. .

The concentration of the active ingredient in the preparation and the amount of application of the preparation may be arbitrarily selected depending on the dosage form, application method, wood treatment, soil treatment, prevention or extermination, type of termites, degree of damage caused by termites, etc. However, the content of the active ingredient represented by general formula (1), for example in the case of liquids, powders, etc., is about 0.1 to
20% by weight is practical, and about 1-10% by weight even more practical.

The termite control agent of the present invention applies the active ingredient itself or its preparation to termite infestation sites and nests, foundations, columns, building materials, structures, the soil, coverings of electric lines or cables, etc. where termite damage is to be prevented. It can be applied by painting, spraying, dipping, pouring, scattering, mixing, kneading, etc.

It can also be used in combination with other termite control agents depending on the situation of termite occurrence and damage.

Damage caused by termites usually occurs at the same time as, or slightly after, wood decay caused by wood-decaying fungi, so it is especially effective to use it in combination with a decay inhibitor. It may also be used with other antifungal agents.

In many cases, Termite species treated with the termite control agent of the present invention become sensitive to the antennae, which causes browning, amputations, and damage to the legs.
It is sensitive to temperature, humidity, light, etc., but due to the specific properties of this termite drug, even if the termites do not die, they will lose their living functions and eventually become extinct.

Therefore, the termite control agent of the present invention exhibits physiological activity that is different from that of conventional termite agents. On the other hand, it has low toxicity to vertebrates and does not contain harmful heavy metals or halogens, so it does not pollute the natural environment and there is no risk of accumulation and concentration. That is, conventional termite control agents include those that contain heavy metals, such as OCA (preparations of chromium compounds, copper compounds, and arsenic compounds), and those that have a high risk of environmental pollution, such as aldrin, dieldrin, heptachlor, and chlordane. It was mainstream. When compared with these, the termite control agent of the present invention has great industrial significance.

(Example) Next, examples of the present invention will be described.

Example 1 A filter paper (diameter 8.45ce, approximately 2 g) was impregnated with 4 vsg of each of the active ingredients listed in Table 1 in an ether or acetone solution.The filter paper was soaked in acetone for approximately 4 hours when an ether solution was used. If you use a solution, leave it indoors for about 6 hours, then add 2.5ml of distilled water dropwise to kill termites!1.
Thirty soldiers and three soldier ants were introduced and observed every day for two weeks. The results of the efficacy test are shown in Table 1. For comparison, 3,4-dihydroxycinnamic and 4-hydroxy-3-
The results of a similar test using methoxycinnamic acid are also listed.

The results in Table 11 show that the active ingredient of the present invention has strong insecticidal performance against termites.

Chapter 1 Table (note) A: The antennae turn black and the segments are cut off.

B: The antennae are browned and bent.

C: The antennae remain white and no other abnormalities are observed.

Example 2 An oil containing 2% of the active ingredient was prepared by dissolving 3.4-dimethoxy-1-propenylbenzene in a mixed solvent of petroleum and alcohol. Using this oil solution (preventive agent), an efficacy test was conducted in accordance with the indoor test of the antitermite efficacy test method for preventive agents (JTCASPtS No. 1) specified by the Japan White Ant Countermeasures Association. No weight loss was observed. On the other hand, in the untreated specimen, 25
% weight loss. The results of this efficacy test show that the termite control agent (prophylactic agent) of the present invention has sufficient termite control performance.

Example 3 3.4-dimethoxy-1-propenylbenzene was dissolved in a petroleum-based and alcohol-based mixed solvent to prepare an oil solution containing 2% of the active ingredient. Using this oil (preventive agent),
A treated test specimen was prepared by applying the solution to a test stake (Ryukyu pine sapwood) measuring 30 cm x 350 cm at a rate of 200 g/+n2. Using this test specimen, an efficacy test was conducted at the Ryukyu University campus test site in accordance with the field test method of Japan White Ant Countermeasures Association Standard No. 1.

In the test specimens treated with this insecticide, no termite damage was observed even after one year, and no rot was observed. −
The test specimens that had not been subjected to any force treatment suffered from water damage within six months, and had to be replaced with new specimens after six months. The results of this efficacy test show that the present control agent has excellent termite control performance and is useful as a preventive agent for coating, spraying, and dipping.

(that's all)

Claims (1)

[Claims] (1) General formula ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (1) (In the formula, R^1 is a lower alkenyl group, and R^2 and R^3 are the same or different and are hydrogen, methyl group, or lower acyl group. A termite control agent containing a compound shown in ) as an active ingredient.