JP2003183102A - Insecticidal liquid agent against ant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an insecticidal liquid agent against ants capable of controlling ants inhabiting in nests at a low rate, which consequently reduces economic burdens and environmental contamination. <P>SOLUTION: This insecticidal liquid agent against ants is a liquid agent for applying to the nests of the ants, comprising a slow-acting insecticide and a pyroligneous acid. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an insecticidal liquid agent which is applied to ant nests to control ants inhabiting burrows.

[0002]

BACKGROUND ART As an insecticide used for controlling ants, an aerosol agent which is spray-treated to kill insects, a poisoning agent which is installed in a diet to kill insects, or a liquid agent which is sprayed to kill insects. Are known. Japanese Patent Laid-Open No. 2001-55301 proposes, as a liquid agent to be sprayed, an ant control agent in which an ant attractant is mixed with an ant attractant whose absorption into soil is delayed. In addition, in controlling pests other than insecticides, JP 2001-213705 A proposes the use of a wood vinegar solution which is a pest repellent.
On the other hand, Katsuji Yamano (1993): Regarding the termite-preventing effect of wood vinegar, the literature of "white margin" (No. 94, 28 to 31) reports that wood vinegar has no repellent effect on termites.

In the conventional control of ants, aerosol agents are effective for direct control of insects by spraying them against discomforted ants, but spraying them to nests in which ants live, especially nests in the soil. Even so, the drug does not reach the back of the burrow and it is difficult to control ants in the burrow. The food poison is used around the nest, but it is premised that the food is eaten, and the preference varies depending on the type and area of ants, and it is necessary to select the food that suits the taste. Further, the ant control agent proposed in Japanese Patent Laid-Open No. 2001-55301 is a proposal relating to an attractant, and like the bait, a difference in attracting effect occurs depending on the type and area of ants, and a controlling effect in a wide range cannot be expected. .

On the other hand, the liquid agent used by spraying on ant nests is
It is more suitable for the treatment of nests in soil, under dead trees, etc., as compared with the aforementioned aerosol agents, food poisons and attractants. However,
Conventional liquids have a low control effect, the control effect is not exhibited without a large amount of spraying, and a large amount of spraying causes an economic burden in places with many nests such as gardens, flower beds, fields, etc. It has a drawback that it may affect fish and beneficial insects from the spillage.

Examples of chemicals other than insecticides include wood vinegar. Wood vinegar is generally said to have various effects such as sterilization, deodorization and soil modification. However, JP 2
001-213705 and the document "Shiroari" show conflicting results regarding the effect of controlling termites.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and can control ants inhabiting burrows with a small amount of treatment, resulting in reduction of economic burden and environmental pollution. It is an object of the present invention to provide an insecticidal liquid for ants, which reduces

[0007]

That is, the present invention relates to a liquid agent applied to ant nests, which contains a slow-acting insecticide and a wood vinegar solution, and relates to an ant insecticidal liquid.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The liquid agent applied to the ant nest of the present invention has one major characteristic in that it contains a slow-acting insecticide and a wood vinegar. The wood vinegar solution contained in the liquid preparation of the present invention can activate the behavior of ants. Therefore, the behavior of the ants to which the liquid agent of the present invention is attached is activated, and by contacting other ants one after another, the delayed-acting insecticide in the liquid agent can be attached to many ants. As described above, when the liquid preparation of the present invention is used, it is possible to destroy all ants living in the nest with a small amount of liquid preparation.

[0009] Ant nests usually form a complicated and long maze or a complicated and deep maze in places such as soil, dead trees, under deciduous trees, crevices in rocks, and cracks in block walls.
Inhabit in groups. In order to treat these habitats having a large area and a large volume, it is preferable to use a liquid formulation as a formulation because it is excellent in diffusion treatment.

The wood vinegar used in the present invention can be obtained, for example, as follows. When wood is charcoal-burned, pyrolysis gas and steam are generated, and at this time the pyrolysis gas dissolves in the steam and moist smoke is obtained. When this smoke is passed through a pipe and cooled, it becomes liquid. If this liquid is left to stand, a liquid consisting of three layers is produced. The liquid of the intermediate layer is coarse wood vinegar. Further, by refining this crude wood vinegar solution by a static method, a distillation method, a filtration method or the like, a wood vinegar solution can be obtained.

Wood vinegar is 80 to 90% by weight of water and 10 to 2
It is composed of 0% by weight of organic matter, and its component amounts to 200 kinds. Typical components of organic substances are acids, which make up about 50% by weight of organic substances. Among the acids, acetic acid has the highest content. The components of wood vinegar differ slightly depending on the type of wood used as a raw material, carbonization method, carbonization temperature, cooling conditions, etc.As raw materials for wood, hardwood, conifer, bamboo, chips and bark of these are used. However, in the present invention, any raw material and manufacturing conditions may be used without any particular limitation.

The slow-acting insecticide used in the present invention refers to an insecticide having a slow-acting action function or a slow-acting insecticide having a low concentration, and the time taken for an ant touching the insecticide to die. As a result, it is desirable that it is at least about half a day or more. Examples of the slow-acting insecticide include carbamate insecticides, organophosphorus insecticides, pyrethroid insecticides, amidinohydrazone insecticides, pyrazole insecticides, silaneophane insecticides, boric acid and the like. Among them, marathon; dimethyldicarbetoxyethyldithiophosphate, fenitrothione; O, O-dimethyl-O- (3-methyl-4-nitrophenyl) thiophosphate, diazinone;
-Isopropyl-4-methylpyrimidyl-6) -diethylthiophosphate, carbaryl; 1-naphthyl-N-
Methyl carbamate, permethrin; 3-phenoxybenzyl dl-cis / trans-3- (2,2-dichlorovinyl) -2,2-dimethyl-1-cyclopropanecarboxylate, fipronil; 5-amino-1- [2,2.
6-dichloro-4- (trifluoromethyl) phenyl]
-4-[(trifluoromethyl) sulfinyl] -1H
-Pyrazole-3-carbonitrile, 1-methyl-2-
Nitro-3,3-tetrahydrofurylmethylguanidine is preferable, and fipronil is more preferable from the viewpoint of exhibiting high insecticidal activity and exhibiting efficacy even at a low concentration.

When, for example, a fast-acting insecticide is used as the insecticide, the ants touching the insecticide immediately die. However, the use of slow-acting insecticides allows the transfer of insecticides from ant to ant, reaching all ants in the nest and killing them. Furthermore, by using a slow-acting insecticide with high insecticidal activity, the lethal effect can be maintained even if the concentration of the slow-acting insecticide is diminished with the time and the number of migration between ants.

From the viewpoint that the content of the wood vinegar solution can sufficiently activate the behavior of ants and obtain a good sensing range, and that the slow-acting insecticide used retains good stability in the solution, 0.01 to 10% by weight is preferable in the total amount of liquid agent,
0.05 to 5.0% by weight is more preferable.

The wood vinegar solution used can be analyzed for the components contained therein by a gas chromatography method for organic substances, and can be measured for the Karl Fischer method for water content. Therefore, the concentration of the wood vinegar can be measured by using an arbitrary component in the wood vinegar as a standard substance and using the amount as an index.

The content of the slow-acting insecticide is, from the viewpoint of exhibiting proper slow-acting activity and sufficient lethality,
0.0005 to 0.10% by weight is preferable, and 0.000
5 to 0.05% by weight is more preferable. The content is 0.
If it is 0005% by weight or more, a sufficient insecticidal effect and its sustained effect can be obtained. On the other hand, when the content is 0.10% by weight or less, the liquid agent is stable for a long period of time, and the adverse effect due to the outflow of the liquid agent after use due to rainwater or the like can be suppressed.

The liquid preparation of the present invention can be prepared by mixing a wood vinegar and a slow-acting insecticide so as to be homogeneous in a solvent, stirring and dissolving, emulsifying or suspending them. Further, when it is difficult for the liquid agent to be uniform, it may be heated or a solubilizing agent, a surfactant or the like may be added.

The liquid preparation of the present invention can be prepared, for example, as follows. A slow-acting insecticide is dissolved in a dissolution aid to obtain an insecticidal stock solution. A surfactant is added to the obtained insecticidal stock solution and stirred sufficiently, and then the solvent is gradually added little by little. To the final stage, a wood vinegar solution may be added to obtain a desired concentration to obtain the liquid preparation of the present invention.

Examples of the solubilizing agent include ethylene diglycol, butyl diglycol, diethyl diglycol and methyl propylene glycol.

As the surfactant, an anionic surfactant, a cationic surfactant, a nonionic surfactant or an amphoteric surfactant can be used.

Examples of the solvent include water, lower alcohols, polyhydric alcohols such as ethylene glycol, triethylene glycol and propylene glycol, acetone,
Ketones such as methylethylacetone can be used alone or as a mixture thereof. The solvent is preferably water-based from the viewpoints of economy and environmental pollution of the ground and the atmosphere.

Further, if necessary, the liquid preparation of the present invention contains an antioxidant, an ultraviolet light inhibitor, an antifungal agent, a pH adjusting agent,
Dyes and the like can be appropriately blended within the range where the effects of the invention are exhibited.

The pH value of the liquid agent is preferably in the range of pH 2.8 to 4.5. When the pH value is pH 2.8 or more, decomposition of the slow-acting insecticide of the liquid preparation is suppressed and the stability over time becomes good. On the other hand, when the pH value is 4.5 or less, the behavior of ants can be sufficiently activated. Thus, the pH of the liquid
By approaching from the acidic side to the neutral side, and by reducing the acidity, it becomes easy to handle and secure the stability of the slow-acting insecticide over time, and it is possible to expand the types of the slow-acting insecticide that can be used. it can. The pH can be measured with a pH test paper or a pH meter. Further, this pH value can be adjusted by the blending amount of the wood vinegar, and the blending amount is slightly different depending on the type of the wood vinegar used.

Examples of the ants to be controlled according to the present invention include black ants, black-necked ants, black-necked ants, house ants, luscious ants, green ants, black ants,
Giant ant, giant ant, black giant ant, lulian,
Examples include fire ant and carpenter ant.

As a mode of applying the liquid agent of the present invention to ant nests, the liquid agent is contained in a Jolo type container, a hand spray container, a trigger type container, a sprayer and the like, and the liquid agent is sprayed to the nest where ants live. And a container with a nozzle that pierces the nozzle with a burrow to inject the liquid. Further, since it is often used outdoors, from the viewpoint of preventing decomposition of the slow-acting insecticide due to light, heat temperature, etc., for example, the container containing the liquid agent is a light-shielding or heat-resistant container, or the container surface is labeled or It is preferably sealed with a film.

The application amount of the liquid agent is preferably from 50 to 350 mL / m ² , and from 150 to ² from the viewpoint that the liquid agent can be uniformly sprayed.
50 mL / m ² is more preferable.

The use of wood vinegar as the composition of the liquid agent activates the behavior of ants in the diffusion atmosphere of wood vinegar, and expands the range of behavior, and as a result, many ants come into contact with the slow-acting insecticide. Die. That is, by applying the liquid agent to a part of the nest, the ants that touched the wood vinegar, or the ants that felt the atmosphere, became violent and moved, and affected all the ants in the nest. The entire nest becomes panicked, and ants in the back of the nest also appear on the treated surface, touching the slow-acting insecticide.

[0028] At the same time, by using a slow-acting insecticide in the liquid, the ant behavior in which the ants swallow their baits or lick each other with their fellows makes it possible for some ants to come into contact with the slow-acting insecticide. Sex pesticides were transferred from ant to ant,
Eventually, all ants in the nest will come into contact with the slow-acting insecticide. As described above, by applying the liquid agent of the present invention to ant nests, it becomes possible to eliminate all ants living in the nest without treating a wide area or treating a large amount. . In addition, environmental pollution can be suppressed, and further, the influence on the fish, beneficial insects and the like from the outflow of the liquid agent after use due to rainwater or the like can be reduced.

[0029]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.

In order to obtain the composition shown in Table 1, Examples 1 to 1
Insecticide solutions for ants 6 and Comparative Examples 1 to 5 were prepared. In the table, BDG is butyl diglycol (manufactured by Nippon Emulsifier Co., Ltd.) and NK9002A is a surfactant (manufactured by Takemoto Yushi Co., Ltd.).

[0031]

[Table 1]

Test Example 1 With respect to the insecticide liquids for ants of Examples 1 to 4 and Comparative Examples 1 to 4, basic experiments were conducted as follows. Talc was applied to the wall surface, and the soil was spread on the bottom of a polycup (diameter 9 cm) that prevented the ants from rising, and 10 Aphid ants were released and left overnight. The ants gathered in one place and hardly moved. As shown in Fig. 1, 0.5 mL of ant insecticide liquid is placed on the side opposite to the ant population (2 in the figure).
After dropping (position 3 in the figure), one day and two days later, the behavior of the ants was observed, and the mortality rate of the ants was calculated by the following formula.

Lethality = (Number of dead insects / Number of test insects) x 100

The results are shown in Table 2.

[0035]

[Table 2]

As shown in Table 2, in the case of the insecticidal liquid preparation for ants containing the wood vinegar obtained in Examples 1 to 4, the ants are active and move to the point where the liquid preparation is dropped. He touched the liquid and died. However, in the case of the insecticide liquids for ants not containing the wood vinegar obtained in Comparative Examples 1 to 4, the ants survived because they did not move and did not touch the liquid.

Test Example 2 With respect to the insecticidal liquids for ants of Examples 1 to 6 and Comparative Examples 1 to 5, a field experiment was conducted as follows. I found a nest of ants (Kuroyama ants) where I could see the ants coming and going,
The liquid agent was sprayed at a rate of about 200 mL / m ^{2 on} the center of the burrow. The state of the nest after 1 day, 2 days, 5 days, and 10 days after spraying was evaluated according to the following evaluation criteria.

[Evaluation Criteria] −: No ants entered or exited ＋: Confirmation of entry and exit of several ants ++: Checking in and out of many ants ++: Confirmation of alien entry and exit as much as before treatment

The results are shown in Table 3.

[0040]

[Table 3]

As shown in Table 3, in the case of the ant insecticidal liquid containing the wood vinegar obtained in Examples 1 to 6, it is possible to completely exterminate the ant's nest after 2 days at the earliest. Yes,
After 5 days, complete control of all ant nests was possible. However, in the case of the insecticidal liquid for ants obtained in Comparative Examples 1 to 4 which did not contain the wood vinegar, although some ants could be exterminated, complete extermination of the nest was not possible. Further, as in Comparative Example 5, when a fast-acting insecticide was used, even if some ants could be exterminated, complete extermination of the nest was not possible.

Test Example 3 Various concentrations of wood vinegar were prepared and the following tests were carried out for the insecticidal effect of the wood vinegar. Filter paper was laid on a poly cup having a diameter of 9 cm, and 10 ants were released. 0.5 mL of wood vinegar prepared to each concentration was dropped directly onto the ants, and the mortality was observed one day later to determine the mortality rate. The test was performed 3 times. The results are shown in Table 4.

[0043]

[Table 4]

From Table 4, the concentration of wood vinegar is high and its pH is
It can be seen that mortality of ant appears when the value is 2.8, but there is no mortal ant when the concentration becomes lower and the pH value becomes higher, and there is no influence on the environment.

Test Example 4 The insecticide liquids for ants of Examples 7 to 11 were prepared so as to have the compositions shown in Table 5. These liquid agents have the same composition except that they contain various concentrations of wood vinegar.

[0046]

[Table 5]

The insecticidal efficacy of the insecticide liquids for ants of Examples 7 to 11 was confirmed as follows. 9 cm diameter
10 pieces of ants were released by laying a filter paper in the poly cup. Figure 1
As shown in FIG. 5, 0.5 mL of the insecticide liquid for ants was dropped on the side opposite to the ant population (2 in the figure) (position 3 in the figure),
The mortality rate after 1 day was observed and the mortality rate was calculated. The test was performed 3 times. The results are shown in Table 6.

[0048]

[Table 6]

As shown in Table 6, the mortality of ants was 100% when the concentration of the wood vinegar was 0.1% by weight or more as in Examples 7-9. Also, the concentration of wood vinegar is 0.
It can be seen that the mortality of the ants decreases as the amount becomes lower than 1% by weight, and the higher the concentration of the wood vinegar is, the higher the ability to activate the ants and the more effective the extermination of the ants.

[0050]

EFFECTS OF THE INVENTION The insecticide liquid for ants of the present invention can control ants inhabiting burrows with a small treatment amount. Therefore, by applying the insecticide liquid for ants of the present invention to ant nests in the control of ants, It is possible to reduce economic burden and environmental pollution.

[Brief description of drawings]

FIG. 1 is a schematic view showing a group of ants and a dropping position of an insecticidal liquid agent for ants in the polycups used in Test Example 1 and Test Example 4.

[Explanation of symbols]

1 poly cup Group of 2 ants 3 Insecticide for ants

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) A01N 65/00 A01N 53/00 508C

Claims (4)

[Claims] 1. An insecticide liquid for ants, which is applied to ant nests and comprises a slow-acting insecticide and a wood vinegar. 2. The insecticide liquid for ants according to claim 1, wherein the content of the wood vinegar is 0.01 to 10% by weight. 3. The insecticide liquid for ants according to claim 1 or 2, wherein the slow-acting insecticide is fipronil. 4. The insecticide liquid for ants according to claim 1, wherein the pH value of the liquid agent is in the range of pH 2.8 to 4.5.