JP2022068361A - Ant control agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ant control agent having excellent controlling effect on ants, and having reduced load on the environment and humans and animals.

SOLUTION: An ant control agent contains a fatty acid having 12 or more carbon atoms or a salt thereof as an active ingredient.

SELECTED DRAWING: None

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to an ant control agent. More specifically, the present invention relates to an ant control agent containing a specific fatty acid or a salt thereof as an active ingredient, having both a repellent effect and an ant-killing effect, and having no risk of killing plants.

In recent years, ants that invade the house from the outdoors have increased the damage caused by bites, and ants are also listed as one of the unpleasant pests. As the control method, a liquid agent or an aerosol agent containing an insecticidal active ingredient is sprayed directly onto the ants to exterminate them, or a poison bait is brought back to the ants to the burrow to remove the ants in the burrow. The type to be exterminated is the mainstream.
For example, it is known that a liquid agent or an aerosol agent containing a pyrethroid compound as an insecticidal active ingredient can obtain a rapid insecticidal effect by directly spraying it on ants or nests of ants (for example, patent). Document 1 etc.). In addition, it has been reported that poison bait containing a phenylpyrazole compound as an insecticidal active ingredient does not show rapid insecticidal activity due to contact action, and that ants carry the poison bait to the burrow and destroy the entire nest. (Patent Document 2). However, since the above liquids and aerosols have a rapid insecticidal effect due to the contact action, ants that do not come into contact with the insecticidal active ingredient cannot be exterminated. Further, depending on the attracting component contained together with the insecticidal component, the above-mentioned poison bait may have a variation in the transport effect and a sufficient control effect may not be obtained.
Until now, in order to exterminate ants, preparations containing chemically synthesized insecticidal components such as pyrethroid compounds and phenylpyrazole compounds have been widely used, but due to the improvement of users' safety consciousness, insecticides derived from natural components have been widely used. The need for agents is also increasing. For example, an ant control agent having excellent durability, which contains a natural essential oil component such as dihydrojasmon as an ant repellent component, has been reported (Patent Document 3). However, since the active ingredient is a natural essential oil component, it is highly volatile and its repellent effect is not sufficiently sustained, so that a long-term ant control effect cannot be obtained.
Under such circumstances, it is desired to develop a drug having an excellent control effect on ants and reducing the burden on the environment and humans and animals.

Japanese Patent Application Laid-Open No. 2003-073216 Japanese Unexamined Patent Publication No. 08-175910 Japanese Unexamined Patent Publication No. 2013-126960

It is an object of the present invention to provide an ant control agent which has an excellent control effect on ants and has a reduced load on the environment and humans and animals.

As a result of diligent research to solve the above problems, the present inventor has a drug containing a fatty acid having 12 or more carbon atoms or a salt thereof as an active ingredient, which has both a repellent effect and an ant-killing effect on ants. We found that and came to solve the above problem.

Specifically, the present invention has the following gist.
1. 1. An ant control agent comprising a fatty acid having 12 or more carbon atoms or a salt thereof as an active ingredient.
2. 2. 1. The active ingredient is a fatty acid having 12 or more and 18 or less carbon atoms or a salt thereof. The ant control agent described in.

The ant control agent of the present invention has an excellent feature of exhibiting an ant-killing effect as well as a repellent effect, and has an advantage that the control performance is surely achieved. Therefore, the ant control agent of the present invention exerts an ant-killing effect by spraying or spraying the ants directly or on the burrows of the ants, and further, the sprayed or sprayed place repels the ants. Since it has an effect, it can repel ants and inhibit the colonization of ants.
Moreover, since the ant control agent of the present invention is also excellent in sustainability of the repellent effect, a long-term ant control effect can be obtained.
Further, the ant control agent of the present invention is characterized in that it is highly safe for plants in the place where it is sprayed or sprayed because there is no risk of killing the plants.

It is a figure which showed the outline of the ant colonization inhibition confirmation test and the sustainability confirmation test of the ant colonization inhibition effect in an Example. It is a figure which showed the outline of the ant killing activity confirmation test in an Example.

Hereinafter, the ant control agent of the present invention will be described in detail.
The ant control agent of the present invention contains a fatty acid having 12 or more carbon atoms or a salt thereof as an active ingredient, and is effective against various ants. For example, fire ant, fire ant, fire ant, black imported fire ant, black imported fire ant, tobiiro keari, kotobiiro keari, hayashi tobiiro keari, kiiro silia geari, tobi iro siri geari, haributo siri geari, oshiwa ant, tobi iro shiwa ant, wrinkle ant Ali, Formica japonica, Formica japonica, Formica japonica, Formica japonica, Amime ant, Umematsu ant, Wrinkle keari, Ezokushi keari, Ozu ant, Ozu red ant, Azuma Ozu red ant, Aphaenogaster flies, Kuronaga ant, Muneboso ant, Tofushiari, Luriari, Argentine ant, etc.

The active ingredient of the ant control agent of the present invention is a fatty acid having 12 or more carbon atoms. Specifically, for example, lauric acid (12 carbon atoms), myristic acid (14 carbon atoms), pentadecyl acid (15 carbon atoms), palmitic acid (16 carbon atoms), palmitoleic acid (16 carbon atoms), margaric acid (16 carbon atoms). 17 carbon atoms), stearic acid (18 carbon atoms), oleic acid (18 carbon atoms), baxenoic acid (18 carbon atoms), linoleic acid (18 carbon atoms), α-linolenic acid (18 carbon atoms), γ-linolene Acid (18 carbons), eleostearic acid (18 carbons), arachidic acid (20 carbons), meadic acid (20 carbons), arachidonic acid (20 carbons), behenic acid (22 carbons), lignoserine Examples thereof include acid (24 carbon atoms), nervonic acid (24 carbon atoms), cellotic acid (26 carbon atoms), montanic acid (28 carbon atoms), melicic acid (30 carbon atoms) and the like.
Examples of the salt include sodium salt, potassium salt, calcium salt, magnesium salt, ethanolamine salt, triethanolamine salt, ammonium salt and the like, but these salts can be added as a single substance to the ant control agent. However, the fatty acid and the corresponding neutralizing agent may be added separately to form salts in the ant control agent. For example, the fatty acid and triethanolamine or sodium hydroxide as a neutralizing agent can be added separately and used as a triethanolamine salt or a sodium salt. In the present invention, sodium hydroxide, triethanolamine, ammonia and potassium hydroxide are suitable as the neutralizing agent.
As the active ingredient of the ant control agent of the present invention, fatty acids having 12 or more carbon atoms are preferable, fatty acids having 12 or more and 18 or less carbon atoms are more preferable, and lauric acid and myristic acid, palmitic acid, oleic acid, linoleic acid, and linolenic acid are preferable. Acids are particularly preferred.
The ant control agent of the present invention preferably contains the active ingredient fatty acid having 12 or more carbon atoms or a salt thereof in a range of 0.01% by weight or more and 10% by weight or less of the entire control agent, and among them, 0. It is more preferably contained in the range of 05% by weight or more and 5% by weight or less, and further preferably 0.1% by weight or more and 3% by weight or less.

The ant control agent of the present invention is a pharmaceutical product, and the pharmaceutical products include, for example, oils, emulsions, wettable powders, flowable agents (suspension agents in water, emulsions in water, etc.), microcapsules, and powders. , Granules, tablets, gels, liquids, sprays, aerosols and the like. Among them, a spray formulation such as a spray agent or an aerosol agent, a spray agent in which a liquid agent is filled in a container with a jouro head, and the like can make the best use of the ant repellent performance and the ant killing performance of the present invention. Suitable as a pharmaceutical type.
As one production example, a solution (Liquid A) is prepared by dissolving a fatty acid having 12 or more carbon atoms or a salt thereof in a solvent using a surfactant as necessary, and the solution A is mixed with an appropriate amount of water. Examples thereof include a method of making an ant control agent which does not need to be diluted at the time of use by stirring. As the water, tap water, ion-exchanged water, distilled water, filtered water, sterilized water, groundwater and the like are used.

Examples of the liquid carrier include alcohols (methanol, ethanol, isopropyl alcohol, butanol, hexanol, benzyl alcohol, ethylene glycol, etc.) and ethers (diethyl ether, ethylene glycol dimethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol monomethyl ether). Ethers, tetrahydrofuran, dioxane, etc.), esters (ethyl acetate, butyl acetate, isopropyl myristate, ethyl lactate, etc.), ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, etc.), aromatic or aliphatic hydrocarbons (ethyl acetate, butyl acetate, cyclohexanone, etc.) Xylene, toluene, alkylnaphthalene, phenylxysilyl ethane, kerosine, light oil, hexane, cyclohexane, etc.), halogenated hydrocarbons (chlorobenzene, dichloromethane, dichloroethane, trichloroethane, etc.), nitriles (acetohydrate, isobutyronitrile, etc.), Hydrocarbons (dimethylsulfoxide, etc.), heterocyclic solvents (sulfolane, γ-butyrolactone, N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, N-octyl-2-pyrrolidone, 1,3-dimethyl-2) -Imidazolidinone), acid amides (N, N-dimethylformamide, N, N-dimethylacetamide, etc.), alkylidene carbonates (propylene carbonate, etc.), vegetable oils (soybean oil, cottonseed oil, etc.), vegetable essential oils (orange oil, orange oil, etc.) Hisop oil, lemon oil, etc.), and water.

As the surfactant, a nonionic surfactant, an anionic surfactant, a cationic surfactant, and an amphoteric surfactant can be used. Examples of the nonionic surfactant include polyoxyalkylene allylphenyl ether, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene allyl phenyl ether, polyoxyethylene styryl phenyl ether, and polyoxyethylene alkyl phenyl. Ether formaldehyde condensate, polyoxyethylene-polyoxypropylene block polymer, polyoxyethylene-polyoxypropylene block polymer alkylphenyl ether, sorbitan fatty acid ester (sorbitan monooleate, sorbitan laurate, etc.), polyoxyethylene fatty acid ester, poly Examples thereof include oxyethylene sorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil, polyethylene glycol fatty acid ester, and polyethylene glycol fatty acid ether. Anionic surfactants include, for example, alkyl sulphates, polyoxyethylene alkyl ether sulphates, polyoxyethylene alkyl phenyl ether sulphates, polyoxyethylene benzyl (or styryl) phenyl ether sulphates or polyoxyethylene-polyoxypropylene block polymers. Sodium, calcium or ammonium salts of sulfuric acid; alkyl sulfonate, dialkyl sulfosuccinate, alkylbenzene sulfonic acid (calcium dodecylbenzene sulfonate, etc.), mono- or di-alkylnaphthalene sulfonic acid, naphthalene sulfonic acid formaldehyde condensate, Salts of sodium, calcium, ammonium or alkanolamine salts of lignin sulfonic acid, polyoxyethylene alkyl phenyl ether sulfonic acid or polyoxyethylene alkyl ether sulfosuccinate; polyoxyethylene alkyl ether phosphate, polyoxyethylene, mono- or di. -Alkylphenyl ether phosphate, polyoxyethylene benzyl (or styryl) phenyl ether phosphate, polyoxyethylene benzyl (or styryl) phenyl ether phosphate, polyoxyethylene-polyoxypropylene block polymer phosphate sodium or calcium salt, etc. Salt is mentioned. Examples of the cationic surfactant include a quaternary ammonium salt, an alkylamine salt, an alkylpyridinium salt, an alkyloxide and the like. Examples of the amphoteric tenside agent include alkyl betaine, amine oxide and the like.

As the gaseous carrier used in the formulation, for example, butane gas, freon gas, alternative fron (such as HFO, HFC), liquefied petroleum gas (LPG), dimethyl ether, carbon dioxide gas, and nitrogen gas are used as the solid carrier. For example, clays (kaolin, diatomaceous soil, bentonite, clay, acidic white clay, etc.), synthetic hydroxide-containing silicon, talc, ceramics, other inorganic minerals (serisite, quartz, sulfur, activated carbon, calcium carbonate, hydrated silica, etc.), porous. Examples include pledges.

The ant control agent of the present invention can be added with an antifreezing agent, an antifoaming agent, a preservative, an antioxidant, a thickener and the like, if necessary.
Examples of the antifreeze agent include ethanol, ethylene glycol, propylene glycol, ethyl cellosolve, butyl carbitol, 3-methyl-methoxybutanol and the like.
Examples of the defoaming agent include Antifoam E-20 (silicone emulsion, Kao Co., Ltd., trade name), Antifoam C (Toray Dow Corning Co., Ltd., trade name), Antifoam C Emulsion (Toray Dow Corning Co., Ltd., trade name). Product name), Rhodesyl 454 (Solvey, product name), Rhodesyl Antifoam 432 (Solbay, product name), TSA730 (Tanac, product name), TSA731 (Tanac, product name), TSA732 (Tanac, product name) Examples thereof include silicone-based defoamers such as YMA6509 (trade name) and YMA6509 (trade name), and fluorine-based defoamers such as Fluott PL80 (Clariant, trade name).
Examples of preservatives include Biohope and Biohope L (chemical name: organic nitrogen-sulfur complex, organic bromine-based compound), Bestside-750 (chemical name: isothiazolin-based compound, 2.5 to 6.0%). , Preventol D2 (chemical name: benzyl alcohol mono (poly) hemiformal), PROXEL GXL (S) (chemical name: 1,2-benzoisothiazolin-3-one, 20%), 5-chloro-2-methyl-4 -Isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, 2-bromo-2-nitropropane-1,3-diol, potassium sorbate, sodium dehydroacetate and the like can be mentioned.
As the antioxidant, tetrakis [methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane (Tominox TT, IPI Corporation, trade name / IRGANOX1010 or IRGANOX1010EDS, Ciba Japan, Inc., trade name), butylated hydroxytoluene (BHT), butylated hydroxyanisole (BHA), propyl gallate, and vitamin E, mixed tocopherol, α-tocopherol, ethoxykin, ascorbic acid and the like.

The ant control agent of the present invention may be a viscous liquid agent in order to suppress absorption into the soil and exert a sufficient ant-killing effect when treated in or around the burrow. In adjusting the viscosity, for example, glycerin, zanflo, xanthan gum, pectin, arabic gum, guar gum, agar, cellulose and its derivatives, starch and its derivatives, carboxyalkylateds, polyacrylic acid salts, polymaleates, polyvinyl alcohol, etc. One or more thickeners such as polyvinylpyrrolidone and carboxyvinyl polymer may be used.

If necessary, for example, natural pyrethrin, alesulin, resmethrin, flamethrin, prarethrin, terraresulin, phthalthrin, phenothrin, permethrin, ciphenotrin, cypermethrin, transfluthrin, methoflutrin, profluthrin, as long as the effects of the present invention are not impaired. Pyrethroid compounds such as imiprothrin, Empentrin, etofenprox, and silafluofen; carbamate compounds such as propoxer and carbalyl; organic phosphorus compounds such as fenitrothione and DDVP; oxaziazole compounds such as methoxadiazone; phenylpyrazole compounds such as fipronyl Nitroguanidine compounds such as amidoflumeth; Neonicotinoid compounds such as imidacloprid and dinotefuran; Insect immature hormone-like compounds such as metoprene and hydroprene; Anti-juvenile hormone-like compounds such as plecosene; Phytontide, peppermint oil, orange oil , Various ant control agents such as insecticidal essential oils such as cinnamon oil and chopstick oil; and synergistic agents such as cinepyrin and piperonyl butoxide may be used in combination. However, in consideration of the improvement of the safety consciousness of the user, it is preferable that the ant-controlling liquid agent of the present invention does not use these insecticidal components in combination with the active ingredient of the present invention.

The ant control agent of the present invention contains an active ingredient consisting of a fatty acid having 12 or more carbon atoms or a salt thereof per square meter of a place where ants are to be controlled in an amount of 0.01 to 30 g, preferably 0.05 to 25 g. It is good to spray. The treatment frequency should be about once a month after confirming the occurrence of ants. The processing means is not particularly limited.
The ant control agent of the present invention can be used indoors as well as outdoors without any problem. For example, the ant-killing effect can be exerted by spraying or spraying the ants directly or on the burrows of the ants. Further, the ant control agent of the present invention can be applied to kitchens, doorways, entrances, corridors, living rooms, windowsills, verandas, wood decks, ports, asphalt and other road surfaces, gardens, planters, plant pots, flower beds, vegetable gardens, lawns, farmlands, etc. By spraying or spraying on or around a building such as a house, it exerts an ant-killing activity and an excellent repellent effect on ants, and not only has an ant control effect after treatment, but also ants for a long period of time after treatment. It can prevent the colonization of ants by keeping them away.
Since the ant control agent of the present invention has both ant-killing activity and ant-repelling effect, it exerts an excellent ant-controlling effect without further using an insecticidal component, so that it surely invades a building such as a house. It is extremely practical in terms of controlling ants.

Hereinafter, the present invention will be described in more detail with reference to formulation examples, test examples and the like, but the present invention is not limited to these examples.
First, an example of a test sample of the ant control agent of the present invention is shown. In the examples, unless otherwise specified, parts mean parts by weight.
In preparing the test specimens of the following Examples and Comparative Examples, lauric acid, myristic acid, oleic acid, palmitic acid, linoleic acid, capric acid, capric acid, polyoxyethylene sorbitan monooleate (Tween80), and acetone were used. A reagent manufactured by Wako Pure Chemical Industries, Ltd. was used, linolenic acid and pelargonic acid were used, and a reagent manufactured by Tokyo Kasei Kogyo Co., Ltd. was used. In particular, "α-linolenic acid" was used for linolenic acid.

<Ant colonization inhibition confirmation test>
(1) Preparation of test sample Example 1
Prepare a test sample by using 2.5 parts by weight of lauric acid (12 carbon atoms) and acetone to make the total amount 100 parts by weight, mixing each component and stirring with a magnetic stirrer so that the composition becomes uniform. bottom.
In Examples 2 to 13 and Comparative Examples 1 and 2, the respective test samples were obtained in the same manner as in Example 1 with the formulations shown in Tables 1 and 2 below.

(2) Test method for ant repellent activity The outline of the test is shown in FIG.
Calcium carbonate was applied to the upper part of the inner wall surface of a plastic container having a length of 25 cm, a width of 30 cm, and a height of 10 cm to prevent the test insects from escaping. Two places of cotton wool impregnated with water were installed in the container as feeding grounds for the test insects. Next, 2 mL of each test sample was impregnated into a filter paper having a diameter of 5.5 cm, and the filter paper was placed so as to surround one feeding area. As a control, a filter paper having a diameter of 5.5 cm impregnated with 2 mL of acetone was installed so as to surround the other feeding area.
Next, the test insects (50) were released into the container, the number of colonization (the number of ants on the filter paper) after 30 minutes was counted, and the repellent rate (%) was calculated by the following formula. The test was conducted at 25 ° C. under bright conditions.
[Judicial disqualification rate (%) calculation formula]
Repellent rate (%) = {(number of control colonization-number of test sample colonization) / (number of test sample colonization + number of control colonization)} x 100
The ant repellent activity was evaluated from the repellent rate (%) calculated by the above formula in four stages according to the following evaluation criteria.
[Evaluation criteria]
"◎": Repellent rate: 100%
"○": Repellent rate: 70% or more and less than 100% "●": Repellent rate: 60% or more and less than 70% "×": Repellent rate: Less than 60% , It was judged to be practical as an ant control agent of the present invention.
The composition of the test sample, the repellent rate (%), and the repellent evaluation result are summarized in Table 1 for Formica japonica and Table 2 for Pristomyrmex vulgaris.

As is clear from the results in Tables 1 and 2, fatty acids having 12 or more carbon atoms have a repellent rate of 100% or 70% or more regardless of the types of ants such as Formica japonica and Pristomyrmex vulgaris, and can exert an excellent repellent effect. confirmed. On the other hand, caprylic acid, which is a fatty acid having 10 carbon atoms, and caprylic acid, which is a fatty acid having 8 carbon atoms, both have a repellent rate of less than 60% against black ants and ant ants. It became clear that there was a difference depending on the number of carbon atoms.

<Sustainability confirmation test of ant colonization inhibitory effect>
The test was carried out in the same manner as the above-mentioned "ant colonization inhibition confirmation test" except that a filter paper having a diameter of 5.5 cm impregnated with 2 mL of each test sample was placed in a draft at 25 ° C for 30 days and air-dried. Then, the number of colonization (the number of ants on the filter paper) 1 hour after the test insects (50) were released was counted. The repellent rate (%) was calculated by the above formula and evaluated in 4 stages according to the above evaluation criteria.
The composition of the test sample, the repellent rate (%), and the repellent evaluation results are summarized in Table 3 for Formica japonica and Table 4 for Pristomyrmex vulgaris.

As is clear from the results in Tables 3 and 4, fatty acids having 12 or more carbon atoms have a practical disqualification rate of 100% or 60% or more regardless of the type of ants such as Formica japonica and Pristomyrmex vulgaris even after 30 days from the treatment. It was confirmed that it exerts a sexual repellent effect and is excellent in sustainability of the colonization inhibitory effect in the treated place.

<Ant killing activity confirmation test>
(1) Preparation of test sample Example 22
Using 2.5 parts by weight of lauric acid (12 carbon atoms), 1.0 part by weight of "Tween 80" and ion-exchanged water, the total amount is 100 parts by weight, and each component is mixed and the composition is uniform with a magnetic stirrer. A test sample was prepared by stirring so as to be.
In Examples 23 to 26 and Comparative Example 3, the respective test samples were obtained in the same manner as in Example 22 with the formulations shown in Table 5 below.

(2) Test method for ant-killing activity The outline of the test is shown in FIG.
Calcium carbonate was applied to the upper part of the inner wall surface of a plastic cup (trade name: KP-200 (manufactured by Koike Plastic Co., Ltd.)) having an inner diameter of 100 mm and a height of 45 mm to prevent the test insects from escaping. Five test insects were released into the cup, and 3 mL of each test sample was treated with a sprayer from a distance of 10 cm. After the treatment, the test insects were transferred to a clean plastic cup, and the time until knockdown of all the heads (KT) was measured. In addition, the number of lethality was counted after 12 hours, and the fatality rate (%) was calculated by the following formula. The test was conducted at 25 ° C. under bright conditions.
[Case fatality rate (%) calculation formula]
Case fatality rate (%) = number of dead test insects / total number of test insects x 100
Table 5 summarizes the composition of the test sample, the mortality rate (%) for Formica japonica and Pristomyrmex vulgaris, and the time until knockdown of Formica japonica (KT).

As is clear from the results in Table 5, it was confirmed that fatty acids having 12 or more carbon atoms have 100% ant-killing activity regardless of the types of ants such as Formica japonica and Pristomyrmex vulgaris. In addition, the time (KT) for knocking down all heads is within 30 seconds for lauric acid, and within 50 seconds for other fatty acids having 12 or more carbon atoms. Therefore, the ant control agent of the present invention is an ant control agent. It was clarified that it has an excellent knockdown effect on species and also has an excellent ant-killing activity.

<Confirmation test for safety of plants>
(1) Preparation of test sample Example 27
Using 1.0 part by weight of lauric acid (12 carbon atoms), 0.3 part by weight of "Tween 80" and ion-exchanged water to make the total amount 100 parts by weight, mix each component and make the composition uniform with a magnetic stirrer. A test sample was prepared by stirring so as to be.
In Examples 28 to 31 and Comparative Examples 4 to 6, the respective test samples were obtained in the same manner as in Example 27 with the formulations shown in Table 6 below.

(2) Confirmation test method for safety of plants The seeds of Kaiware daikon were sown in a 5 cm square cell tray, and the plants grown in a constant temperature room (20 ° C.) for 5 days were subjected to the test.
Test samples having the compositions shown in Table 6 (Examples 27 to 31 and Comparative Examples 4 to 6) were sprayed with 4 mL each by a trigger spray. The herbicidal effect was evaluated on a 6-point scale according to the following evaluation criteria from the area ratio of discoloration or withering after 1 day of treatment.
[Evaluation criteria]
"5": 80% or more discoloration or death to 100% death (complete death)
"4": Discoloration or death of 60% or more and less than 80% "3": Discoloration or death of 40% or more and less than 60% "2": Discoloration or death of 20% or more and less than 40% "1": Less than 20% Withering "0": No discoloration The composition of the above test sample and the safety evaluation results for plants are summarized in Table 6.

As is clear from the results in Table 6, fatty acids having 12 or more carbon atoms do not have the ability to kill plants, unlike pelargonic acid, which is known to have herbicidal activity. confirmed. From this, it was clarified that the ant control agent of the present invention has a feature that it is highly safe for plants in the place where it is sprayed or sprayed and there is no risk of causing phytotoxicity.

The ant control agent of the present invention containing a fatty acid having 12 or more carbon atoms as an active ingredient exhibits an excellent ant repellent effect regardless of the type of ants, and the ant repellent effect is also excellent in sustainability. About one month after the treatment of the ant control agent of the present invention, it is extremely practical because it inhibits the invasion of ants into buildings such as houses and exerts the effect of inhibiting colonization in the treated place.
Moreover, the ant control agent of the present invention has an excellent feature of exhibiting an ant-killing effect as well as a repellent effect. That is, the ant control agent of the present invention exerts an ant-killing effect by spraying or spraying the ants directly or on the burrows of the ants, and further, the sprayed or sprayed place repels the ants. Since it has an effect, it can repel ants and inhibit the colonization of ants.
Further, the ant control agent of the present invention has a feature that it is highly safe for plants in the treated place because there is no risk of killing plants.

Claims (2)

An ant control agent comprising a fatty acid having 12 or more carbon atoms or a salt thereof as an active ingredient. The ant control agent according to claim 1, wherein the active ingredient is a fatty acid having 12 or more and 18 or less carbon atoms or a salt thereof.

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