JPH1067607A - Wood insecticide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a wood insecticide that contains fatty acids as the effective ingredient for controlling wood insects, such as termite and wood engraver. SOLUTION: This wood insecticide contains, as its effective ingredient, at least one of 6-12C fatty acids, for example, caproic acid, heptanoic acid, caprylic acid, nonanoic acid, capric acid, lauric acid, sorbic acid, etc., in a quantity of 0.01-9wt.%. This wood insecticide has such activities as food habit inhibition, insect repellency and insecticidal action, is low toxic to human beings and mild to environment, does not color woods, etc., and can be used by such a method as coating, dusting, dipping, injection, mixing and spraying.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood pest controlling agent, and more particularly to an insect-feeding inhibitory action, a repellent action, and a insecticide against termites and leaf bark beetles that erode buildings and furniture using wood. The present invention relates to a wood pest controlling agent having an activity such as an action.

[0002]

BACKGROUND OF THE INVENTION As a controlling agent for wood pests such as termites and bark beetles, organic phosphorus compounds such as phoxime and chlorpyrifos are used as general insecticides. And insecticides, carbamate insecticides such as propoxer and bassa, and pyrethroid insecticides such as arethrin and permethrin.

Although most of the above compounds have relatively low toxicity, some of the organophosphorus and carbamate insecticides have a cholinesterase activity inhibitory effect on the human body, and pyrethroid insecticides have high fish toxicity. There are many things, and it is hard to say that it is sufficiently safe from the viewpoint of environmental pollution. Some of these compounds are commercially available by blending octachlorodipropyl ether (hereinafter referred to as S-421) as a synergist because of problems such as sustained efficacy and price-performance ratio. Many. Although S-421 is an excellent synergist, some have questioned its use as a chlorine-based agent from the viewpoint of environmental pollution.

Therefore, recently, there has been a demand for an environmentally friendly pest control agent that is highly safe for humans and livestock, and fatty acids are one of those satisfying the above-mentioned required characteristics. Examples of the use of the fatty acid as a pesticide include a repellent for tobacco beetles containing a fatty acid having 6 to 11 carbon atoms as an active ingredient (Japanese Patent Application Laid-Open No. 60-185).
702).

However, the tobacco beetle, a target pest of the repellent described in the above publication, is a pest of leaf tobacco and stored foodstuffs, and has not been studied as a controlling agent for wood pests such as termites at all. In other research cases,
It has only been known that oleic acid, which is an unsaturated higher fatty acid, has an effect as a composition of a controlling agent or an attractant against sanitary pests such as mites and cockroaches (JP-A-4-342506, JP-A-4-3425
No. 11, JP-A-2-142704). However, oleic acid is an unsaturated fatty acid, and may be oxidized when left in the air to change to a saturated fatty acid, and when applied to wood or the like, may be partially oxidized and colored. There was a problem that there is.

The present invention has been made in view of the above problems and has an activity of inhibiting feeding, repelling and insecticidal effects on wood pests, and has high safety for humans and animals, and is environmentally friendly. It is an object of the present invention to provide a wood pest controlling agent which does not have a risk of coloring wood or the like.

[0007]

Means for Solving the Problems and Their Effects To achieve the above object, the wood pest controlling agent (1) according to the present invention comprises:
It is characterized in that it contains at least one fatty acid having 6 to 12 carbon atoms as an active ingredient.

According to the above-mentioned wood pest controlling agent (1), it contains at least one fatty acid having 6 to 12 carbon atoms as an active ingredient, and has an antifeeding action and a repellent action against wood pests. It has activity such as insecticidal action, has low toxicity to the human body, is environmentally friendly, and has no fear of coloring wood or the like.

The wood pest controlling agent (2) according to the present invention
Is characterized in that in the above-mentioned wood pest controlling agent (1), termites are used as target wood pests.

According to the wood pest control agent (2), it contains at least one fatty acid having 6 to 12 carbon atoms as an active ingredient, and has a particularly excellent antifeedant effect on termites. It has activities such as repellent action and insecticidal action.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The carbon number used in the present invention is 6 to
The 12 fatty acids may have a linear structure or a branched structure. Preferred specific examples of the fatty acid include saturated fatty acids such as caproic acid, heptanoic acid, caprylic acid, nonanoic acid, capric acid, and lauric acid, and unsaturated fatty acids such as sorbic acid. These fatty acids may be used alone or in combination of two or more. The preferable content of the fatty acid in the drug is 0.01 to 90 wt%.

The form of the preparation is not particularly limited as long as it contains the components of the wood pest control agent according to the present invention. Examples of the form include a solution, a wettable powder, a suspending agent and a dispersing agent. Agents, emulsions, oils, lotions and the like; semisolids such as pastes and creams; various granules, microcapsules, sprays, aerosols, paints and the like.
These can be appropriately selected according to the purpose of use and the application site. In addition, these preparations can be manufactured by a known method.

In addition, as long as the effect of the active ingredient of the wood pest control agent according to the present invention is not impaired, for example, an insect repellent, an antiseptic / fungicide, a resin, a solvent, other additives ( For example, stabilizers such as antioxidants and ultraviolet absorbers, emulsifiers, coloring agents, pigments, etc.) may be included.

Examples of the insect repellent include organophosphorus pesticides such as phoxime, chlorpyrifos, fenitrothion, pyridafenthion, and isofenphos; pyrethroid insecticides such as cyfluthrin, permethrin, tralomethrin, fenvalerate, etofenprox, Hoe-498; Examples thereof include nitroguanidine-based insecticides such as imidacloprid, nitromethylene-based insecticides, insect repellents such as dibutyl succinate and diethyltoluamide, and potency enhancers such as S-421.

Examples of the antiseptic / antifungal agent include 3-bromo-2,3-diiodo-2-propenylethyl carbonate,
Organic iodine preservatives such as 3-iodo-2-propynylbutyl carbamate, 2,3,3-triiodoallyl alcohol, parachlorophenyl-3-iodopropargyl formal,
2- (4-thiazolyl) benzimidazole, benzimidazole such as 2-thiocyanomethylthiobenzothiazole and benzothiazole preservatives, 1- (2- (2 ', 4'-dichlorophenyl) -1,3-dioxolan-2 -Yl-methyl) -1H-1,2,
4-triazole, 1- (2- (2 ', 4'-dichlorophenyl) -4-
Propyl-1,3-dioxolan-2-yl-methyl) -1H-1,
Triazole preservatives such as 2,4-triazole, α- (2- (4-chlorophenyl) -ethyl) -α- (1,1-dimethylethyl) -1H-1,2,4-triazole-1-ethanol And the like.

As the resin, for example, alkyd resin,
An acrylic resin, a fluororesin, a silicone resin, and the like can be given.

Examples of the solvent include Exxon Naphtha No. 7, Exxon naphtha No. 6. Exor D80
Aliphatic organic solvents such as (exxon Chemical Co., Ltd.), Solvesso 150, Solvesso 200 (exxon Chemical Co., Ltd.), Nisseki Hisol SAS 296,
Nisseki Hisol SAS-LH, Alken L (Nippon Petrochemical Co., Ltd.), PAD (Nikko Sekiyu KK), aromatic organic solvents such as dibutyl phthalate, dioctyl phthalate, diallyl phthalate, etc. Is mentioned.

The wood pests to which the wood pest control agent of the present invention is applied include, for example, insects belonging to the order of the termites, the order of the order Coleoptera and the order of the wasps. Specific examples of the insects belonging to the termites include, for example, those belonging to the termite family such as Yamato termite and house termite, and those belonging to the family Levitermite such as terrestrial termite. Specific examples of the insects belonging to the order Coleoptera include fly bark beetle, oak fly bark beetle, zelkova fly bark beetle, those belonging to the family of the beetle beetle family such as the beetle bark beetle, such as the beetle beetle, the beetle beetle, the pine beetle, the beetle beetle, and the black beetle. Those belonging to the family Coleoptera, such as Coleoptera crispinae, those belonging to the family Coleoptera, such as Coleoptera crispinae, Japanese Bamboo locust beetle, Conan locust beetle, and the Onaga cinnamon beetle,
Examples include those belonging to the family Cerambycidae such as house beetle, those belonging to the weevil family such as the weevil, those belonging to the bark beetle family such as the bark beetle, and others including those belonging to the caterpillar family and the weevil family. Specific examples of the insects belonging to the order of the wasp are, for example, those belonging to the bee family, such as the wasp, and those belonging to the ant family, such as the red ant. The wood pest control according to the present invention exerts an excellent control effect particularly on termites among these insects.

Next, a controlling method using the wood pest controlling agent according to the present invention will be described.

As described above, the wood pesticide according to the present invention can be used in various forms, and these various forms of wood pesticides can be used as sources or sources of insect pests, for example, kitchen, It only needs to be present in bathrooms, living rooms, corners of floors, under floors, ceilings, pillars, walls, soil, etc. in an amount sufficient to exert its effect. And various methods depending on the source, for example, coating, spraying, dipping, pouring, mixing, spraying and the like. In addition, when the said wood pest controlling agent is made to exist in soil, the method of spraying to the soil surface, spraying to the groove | channel formed in soil, mixing with soil, etc. can be taken. Further, as described above, in addition to spraying a specific place, for example, a synthetic resin sheet, paper, a sheet-like base such as cloth, by applying, dipping, kneading, etc., the wood pest control agent The pests can be effectively controlled also by attaching or attaching the sheet to which the wood pest control agent has adhered, at the location where the wood pests enter or occur, or by attaching the sheet.

When the wood pesticide is used by the method as described above, a great repellent effect against the wood pest is recognized, or when the wood pesticide is used in the vicinity of the wood pesticide for a certain period of time or longer, the wood pesticide is used. Is known to be stuck or die,
In particular, the effect on termites is remarkable.

As described above, the wood pest controlling agent according to the present invention has activities such as an antifeeding action, a repellent action and an insecticidal action against wood pests such as termites and bark beetles.

[0023]

Examples and Comparative Examples The present invention will be described below in more detail with reference to examples, but the present invention is not limited to these examples. As a comparative example, the number of carbon atoms is 1
A sample solution containing three or more fatty acids was prepared, and the same test as in the example was performed.

Preparation of sample solution (Examples 1 to 7, Comparative Example 1)
To 3 and Reference Example 1) As a wood pest controlling agent according to the example, each of the fatty acids shown in Table 1 below was added so as to be 10% by weight based on n-hexane, and a sample solution containing the fatty acid was prepared. Obtained. In addition, as a drug according to the comparative example and the reference example, a sample solution containing a fatty acid shown in Table 1 below was prepared in the same manner as in the example.

Test Example 1 Quartz sand passed through a 20-mesh sieve was heated to a temperature of 60 ± 2 ° C.
After drying until the weight became constant, cooling was performed to obtain quartz sand for a test. Next, the sample solution was uniformly adhered to 12 g of the quartz sand so that the amount of each sample was 1% by weight based on the quartz sand, and the solvent (n-hexane) was scattered. Further, moisture was attached to these quartz sands so that the water content of the dried quartz sands became 10% by weight. As Comparative Example 4, quartz sand to which water had adhered was prepared in the same manner as described above without treatment with a chemical.

Next, two bottomed cylindrical glass containers (inner diameter 5 cm, height about 12 cm) each having a rubbed portion for connecting glass tubes at a position 2 cm from one end are placed. A glass tube (inner diameter 1.5 cm, length about 10 cm) capable of connecting and communicating was prepared. The glass container and the glass tube were previously dried and sterilized.
Next, one glass container was filled with about 60 g of test quartz sand to which no chemicals or the like had adhered, and the other glass container was filled with about 3 g of pine shards. Further, the central portion of the glass tube was filled with quartz sand treated with the sample solution according to the above-described embodiment and reference example or quartz sand not treated with a chemical, and the two glass containers were connected by the glass tube. Then, 200 ants of termites (Coptotermes formosanus) and 20 soldiers of the termite collected from the nest were placed on the quartz sand in one of the glass containers filled with the quartz sand for the test to which no chemicals were attached. , This test equipment at a temperature of 28 ± 2 ℃,
It was left in a constant temperature room at a humidity of 70% or more for 3 weeks.

After a lapse of three weeks, the termites contained in the glass container filled with quartz sand for the test pass through the glass tube and move to the glass container filled with other pine shards. It was observed whether or not. This test was repeated three times for each sample.

As a result, in the test using the quartz sand treated with the sample solutions according to Examples 1 to 7 and Reference Example 1, no migration of the termite was observed. On the other hand, when the quartz tube treated with the sample solutions according to Comparative Examples 1 to 3 and the untreated quartz sand (Comparative Example 4) were filled in a glass tube, the house termite was made of glass filled with quartz sand. It moved in the pipe and reached the pine shards. Thus, the quartz sand to which the sample solutions according to Examples 1 to 7 and Reference Example 1 were adhered showed a strong repellent effect on house termites.

Test Example 2 Next, as another test example, quartz sand that had been treated in the same manner as in Test Example 1 and untreated quartz sand were spread on petri dishes (diameter 6 cm) that had been dried and sterilized in advance. Next, ten house termite ants collected from the nest were randomly placed on the quartz sand. Next, each petri dish was placed in a container filled with water, and the containers were allowed to stand in a constant temperature room at a temperature of 28 ± 2 ° C. for 4 days. After 2 hours, 1 day, and 4 days, the health status of the termites was determined. Observed. The results are shown in Table 1 below. Comparative Example 4 shows a case where quartz sand to which no sample solution was attached was used.

[0030]

[Table 1]

As is clear from the results in Table 1, the sample solutions according to Examples 1 to 7 (sample solutions containing caproic acid, heptanoic acid, caprylic acid, nonanoic acid, capric acid, lauric acid, or sorbic acid) In the case of using the quartz sand treated with the above, after 2 hours or 4 days, all of the house termites have died, and the sample solution containing the fatty acid not only has the effect of repelling, but also kills the house termites or normal It has been demonstrated that it has the effect of inhibiting the activity function.

On the other hand, when quartz sand treated with the sample solution according to Comparative Examples 1 to 3 (a sample solution containing a fatty acid having 13 or more carbon atoms excluding stearic acid) was used, all the termites remained after 4 days. It was healthy and it was found that these fatty acids had no effect as a control agent.

When quartz sand treated with the sample solution according to Reference Example 1 was used, all the termites died one day later, but discoloration occurred due to oxidation.

Claims (2)

[Claims] 1. A wood pest controlling agent containing at least one fatty acid having 6 to 12 carbon atoms as an active ingredient. 2. The termite is a target wood pest.
A wood pest control agent according to the above.