JP2020026386A - Pest control method and pest control agent for allowing escape from nest - Google Patents

Abstract

To provide a pest control method or a pest control agent that is applied to pest nests to allow pests to escape from the nests.SOLUTION: Provided is a pest control method, comprising applying a composition containing a component (A) of at least one fatty acid selected from fatty acids having 4 to 18 carbon atoms, or a salt thereof, and a component (B) of pyrethrin, to pest nest, and allowing the pest to escape from the nest.SELECTED DRAWING: None

Description

  The present invention relates to a pest control method and a pesticide, which are applied to a pest nest and allow the pest to escape from the nest. More specifically, the present invention relates to a pesticidal method and a pesticidal agent comprising a specific fatty acid or a salt thereof and pyrethrin as active ingredients.

In recent years, the damage caused by social insects such as termites, bees, and ants has increased, which has become a problem. Termites are said to be the most destructive pests among the structural pests that damage wooden materials such as houses and buildings such as buildings of cultural properties. In addition, among the bees, there are many aggressive species such as hornets and wasps, and are pests that are highly requested to be eliminated, such as causing anaphylactic shock when bitten. In addition, ants have entered the house from the outdoors and damage such as biting has increased, and they have become one of the unpleasant pests. In addition, fire ants, also called murderers, have been landed in Japan. It is a big problem.
As the control method, a liquid or an aerosol containing an insecticidal active ingredient is directly sprayed on termites, bees, and ants to exterminate (for example, Patent Documents 1 and 2 and the like). .
However, the liquid or aerosol can control sprayed termites, bees, and ants, but cannot control many termites, bees, and ants in the nest. The damage cannot be prevented from occurring again.
Under such circumstances, there is a demand for the development of a drug that exerts an excellent control effect on social insects such as termites, bees, and ants and suppresses damage. Among them, the nests of social insects are re-established as soon as reproductive worms such as queens that have fertility remain in the nests, so that all the termites, bees, and ants that inhabit the nests There is a need for methods and drugs that can control social insects.

JP 2013-241400 A JP 2015-009846 A

  An object of the present invention is to provide a pest control method and a pest control agent which are applied to a pest nest and allow the pest to escape from the nest.

  The present inventor has conducted intensive studies in order to solve the above-mentioned problems, and as a result, as a result of injecting an agent combining pyrethrin with at least one fatty acid selected from fatty acids having 4 to 18 carbon atoms or a salt thereof to a pest nest. It has been found that when applied, pests can escape from their nests, and in particular, even reproductive insects such as queens that have fertility can escape.

The present invention specifically has the following matters.
1. A method for controlling pests, comprising applying a composition containing the following components (A) and (B) to a pest nest and allowing the pest to escape from the nest.
(A) at least one fatty acid selected from fatty acids having 4 to 18 carbon atoms or a salt thereof (B) pyrethrin; The pest is a social insect. The method for controlling pests according to [1].
3. It is characterized in that the escaping pests include reproductive insects having fertility. Or 2. The method for controlling pests according to [1].
4. A pesticidal composition for use in escaping from a nest, comprising the following components (A) and (B).
(A) at least one fatty acid selected from fatty acids having 4 to 18 carbon atoms or a salt thereof (B) pyrethrin

The pest control method or pest control agent of the present invention is characterized by applying to a pest nest a drug which uses pyrethrin in combination with at least one fatty acid or a salt thereof selected from fatty acids having 4 to 18 carbon atoms. It has the effect of causing the pests inside to escape from the nest and disrupting the function of the nest. Since the escaping pests include reproductive worms having fertility such as queens, according to the pest control method or pest control agent of the present invention, it is possible that the nest is re-established after the pests have escaped. Since no nests are newly nested in the vicinity, an extremely good control effect can be obtained.
Moreover, since the pest control method or the pest control agent of the present invention is excellent in the persistence of the control effect, a long-term control effect can be obtained.
Furthermore, the pesticidal method or pesticidal agent of the present invention has a feature that it is highly safe for plants in a sprayed or sprayed place because there is no possibility of killing the plants.

The pest control method or pest control agent of the present invention will be described in detail below.
<About pests>
The pest to be controlled in the present invention means an insect that damages human living environment. In particular, insects that form a hierarchical group with the queen at the top, generally referred to as social insects, are suitable as control targets of the present invention. Among them, termites, bees, and ants are more suitable as control targets of the present invention, and ants are particularly suitable.
Further, in the present invention, "to escape from the nest" means that all the pests existing in the nest escape from the nest and abandon the nest, that is, do not return to the nest and resume their life. I do. Since all the pests are present in the nest, they naturally include queen-like reproductive insects.

Specific examples of termites, bees, and ants for pests to be controlled in the present invention will be described below, but the present invention is not limited thereto.
The termites refer to, for example, Isoptera insects belonging to the family Termitidae, The termites, the Levitermite, the Sphagnum termite, the Rhinotermitidae, the Sawtooth, and the Termite. Specifically, the termites of the termite, termite, termite, termite, termite, termite, termite, termite, termite, termite, termite, termite, termite, termite, termite, termite, termite, termite, termite, termite, termite, termite , Termite, Takasago termites, Nitobe termites, Musha termites, etc., Eastern subterranean termite, Western subterranean termite, Dark Southern subterranean termite, Aridland subterranean termite, Desert subterranean termite, Nevada dumpwood termite, etc. Can be mentioned.
Bees refer to Hymenoptera pests belonging to the subfamily Vespinae and the subfamily Polistinae. Examples of wasps belonging to the hornet subfamily include giant hornets, hornets, hornets, hornets, hornets, hornets, hornets, cross hornets, hornets, and hornets. Also, as the bees belonging to the subfamily B. subfamily, for example, Japanese paper wasp, Seguro paper wasp, phthalmon paper wasp, Togariphtamon paper wasp, Yamato paper wasp, Kibosia paper wasp, core paper wasp, Pleurotus wasp, Pseudomonas wasp, etc. Indigenous species can be mentioned. In addition to these indigenous species, hornets that have invaded Tsushima and Kitakyushu can also be mentioned. In addition, those belonging to the Hymenoptera pests such as the hornets, the wasps, the wasps, the wasps and the wasps are also included.
Ants refer to insects belonging to the order Bee, Hornet, and Ant. For example, house ants, wood ants, black ants, black ants, black ants, red ants, red ants, red ants, red ants, ants, red ants, ants, red ants, ants, red ants, red ants, ants Ants, black ants, red ants, black ants, black ants, ameiro ants, red ants, plum ants, crested scallops, stag beetles, giant ants, giant ants, ants, red ants, red ants, ants, ants, etc.

<About component (A)>
Component (A) which is one of the active ingredients of the pest control method or pest control agent of the present invention is at least one fatty acid selected from fatty acids having 4 to 18 carbon atoms or a salt thereof. The fatty acid having 4 to 18 carbon atoms may be linear or branched, and may be a saturated fatty acid or an unsaturated fatty acid. Specifically, for example, butyric acid (carbon number 4), valeric acid (carbon number 5), caproic acid (carbon number 6), heptanoic acid (carbon number 7), caprylic acid (carbon number 8), nonanoic acid (carbon number) 9), capric acid (10 carbon atoms), 2-ethylhexanoic acid (8 carbon atoms), isononanoic acid (9 carbon atoms), lauric acid (12 carbon atoms), myristic acid (14 carbon atoms), palmitic acid ( C16), linolenic acid (C18), linoleic acid (C18) and the like. Examples of the salt include a sodium salt, a potassium salt, a calcium salt, a magnesium salt, an ethanolamine salt, a triethanolamine salt, an ammonium salt, and the like.These salts may be added alone in the pesticide, The fatty acid and the corresponding neutralizing agent may be added separately to form a salt in the pesticide. For example, a fatty acid and triethanolamine or sodium hydroxide as a neutralizing agent can be separately added and used as a triethanolamine salt or a sodium salt. In the present invention, as the neutralizing agent, sodium hydroxide, triethanolamine, ammonia, and potassium hydroxide are preferable.
As the component (A) of the present invention, fatty acids having 6 to 14 carbon atoms are preferable, fatty acids having 8 to 10 carbon atoms are more preferable, and nonanoic acid is particularly preferable.
In the pest control method or pest control agent of the present invention, when a fatty acid having 8 to 10 carbon atoms is used as the active ingredient (A), the liquid component is prepared by adding the active ingredient (A) to the composition or It is preferable to contain it in the range of 0.01% by weight or more and 3% by weight or less of the whole pest control agent, and more preferably in the range of 0.05% by weight or more and 2% by weight or less, more preferably 0.1% by weight or more and 1% by weight or less. A range of 5% by weight or less is particularly preferred. In granules and aerosols, the component (A), which is an active ingredient, is contained in an amount of 0.01% by weight or more and 5% by weight or less of the whole composition or pesticidal agent, so that phytotoxicity at the place of application can be suppressed. In particular, the range is preferably 0.05% by weight or more and 4% by weight or less, particularly preferably 0.1% by weight or more and 3% by weight or less. When a fatty acid having 4 to 7 or 11 to 18 carbon atoms is used as the active ingredient (A), the active ingredient (A) is used as a composition or a pesticide regardless of the formulation type. The content is preferably in the range of 0.01% by weight or more and 20% by weight or less, more preferably in the range of 0.1% by weight or more and 10% by weight or less.

<About component (B)>
Component (B), which is one of the active ingredients of the pest control method or pest control agent of the present invention, is pyrethrin. Pyrethrin includes pyrethrin I and pyrethrin II. Pyrethrin I has a chemical name of (1R, 3R) -2,2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylic acid ( 1S) -2-methyl-4-oxo-3- (2Z) -2,4-pentadienyl-2-cyclopenten-1-yl ester compound, pyrethrin II (Pyrethrin II) has the chemical name (1R, 3R) -3-[(1E) -3-Methoxy-2-methyl-3-oxo-1-propenyl] -2,2-dimethylcyclopropanecarboxylic acid (1S) -2-methyl-4-oxo-3- (2Z) -2,4-pentadienyl-2-cyclopenten-1-yl ester compound. The component (B) of the present invention may be any one of pyrethrin I and pyrethrin II or a mixture thereof.
Among them, as the component (B) of the present invention, natural pyrethrin is preferable because it is easily available. Natural pyrethrin is an extract component of pyrethrin containing pyrethrin I, pyrethrin II, cinelin I, cinelin II, jasmolin I and jasmolin II, and is commercially available as a pyrethrin extract (pyrethrin extract). When natural pyrethrin is used as the component (B) of the present invention, the amount of natural pyrethrin used should be in the range of 0.001% by weight or more and 1% by weight or less based on the total amount of pyrethrin based on the total amount of the composition or the pesticide. Is preferable, and the upper limit is more preferably 0.5% by weight or less, particularly preferably 0.1% by weight or less.
The weight ratio of the component (A) to the component (B) is preferably such that the weight ratio of the component (B) to the component (A) is in the range of 0.001 to 1, more preferably 0.005 to 0.5. Is more preferable, and particularly preferably in the range of 0.008 to 0.2.

The composition in the pest control method of the present invention and the pest control agent of the present invention may be formulated. Formulation forms include, for example, oils, emulsions, wettable powders, flowables (water suspensions, emulsions in water, etc.), microcapsules, powders, granules, tablets, gels, liquids, sprays, aerosols And the like. Among them, in addition to spraying preparations such as sprays and aerosols, and spraying agents such as powders and granules, and spraying agents in which a liquid agent is filled in a container with a joule head, etc., as the formulation type in the present invention, the extermination effect is obtained. It is preferable because it can be maximized.
Examples of the liquid carrier that can be used in the formulation include alcohols (methanol, ethanol, isopropyl alcohol, butanol, hexanol, benzyl alcohol, ethylene glycol, etc.), ethers (diethyl ether, ethylene glycol dimethyl ether, diethylene glycol monomethyl ether, diethylene glycol). Monoethyl ether, propylene glycol monomethyl ether, tetrahydrofuran, dioxane, etc.), esters (ethyl acetate, butyl acetate, isopropyl myristate, ethyl lactate, etc.), ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, etc.), aromatics Or aliphatic hydrocarbons (xylene, toluene, alkylnaphthalene, phenylxylylethane, keroshi , Light oil, hexane, cyclohexane, etc.), halogenated hydrocarbons (chlorobenzene, dichloromethane, dichloroethane, trichloroethane, etc.), nitriles (acetonitrile, isobutyronitrile, etc.), sulfoxides (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 (soy oil, cottonseed oil, etc.), vegetable essential oils (orange oil, hyssop oil, lemon oil, etc.), and water. . As the water, tap water, ion-exchanged water, distilled water, filtered water, sterilized water, groundwater, and the like are used.

In the present invention, a saturated hydrocarbon is preferred as a liquid carrier used for preparing an aerosol. Examples of the saturated hydrocarbon include paraffinic hydrocarbons and naphthenic hydrocarbons, and among them, paraffinic hydrocarbons composed of normal paraffin and isoparaffin are preferable. Typical normal paraffins are those having 12 to 14 carbon atoms, such as Neothiozole manufactured by Chuo Kasei Co., Ltd., Normal Paraffin N-12 and Normal Paraffin N-13 manufactured by JX Nippon Oil & Energy Corporation. Normal paraffin N-14, normal paraffin MA, and the like, and examples of isoparaffins include IP Clean LX and IP Solvent manufactured by Idemitsu Kosan Co., Ltd. Further, as the liquid carrier, one or more selected from fatty acid ester solvents, glycol ether solvents, heterocyclic solvents, ester solvents and alcohol solvents are preferably used in combination.
As the propellant used in the aerosol, a wide range of known propellants can be used, and examples thereof include liquefied petroleum gas (LPG), dimethyl ether, alternative chlorofluorocarbons (such as HFO and HFC), carbon dioxide, and nitrogen gas. be able to. Among them, LPG and dimethyl ether are preferably used. When the aerosol is used, the propellant amount is 30 to 95% by volume, particularly 50 to 90% by volume, and the stock solution (in addition to the components (A) and (B), a surfactant, a liquid carrier, etc.) (Total amount) can be 70 to 5% by volume, particularly 50 to 10% by volume of the whole.

  As a surfactant that can be used for formulation, a nonionic surfactant, an anionic surfactant, a cationic surfactant, and an amphoteric surfactant can be used. Examples of the nonionic surfactant include polyoxyalkylene allyl phenyl ether, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene allyl phenyl ether, polyoxyethylene styryl phenyl ether, 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 Oxyethylene sorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil, polyethylene glycol fat Esters, polyethylene glycol fatty acid ethers. Examples of the anionic surfactant include alkyl sulfate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl phenyl ether sulfate, polyoxyethylene benzyl (or styryl) phenyl ether sulfate, and polyoxyethylene-polyoxypropylene block polymer. Sodium, calcium or ammonium salts of sulfuric acid; alkyl sulfonates, dialkyl sulfosuccinates, alkylbenzenesulfonic acids (calcium dodecylbenzenesulfonate, etc.), mono- or di-alkylnaphthalenesulfonic acids, naphthalenesulfonic acid formaldehyde condensates, Lignin sulfonic acid, polyoxyethylene alkyl phenyl ether sulfonic acid or polyoxyethylene alkyl ether sulfosuccinate Lithium, calcium, ammonium or alkanolamine salts; polyoxyethylene alkyl ether phosphate, polyoxyethylene, mono- or di-alkyl phenyl ether phosphate, polyoxyethylene benzyl (or styryl) phenyl ether phosphate, polyoxyethylene -Each salt such as a sodium or calcium salt of a polyoxypropylene block polymer phosphate. Examples of the cationic surfactant include a quaternary ammonium salt, an alkylamine salt, an alkylpyridinium salt, and an alkyl oxide. Examples of the amphoteric surfactant include alkyl betaine and amine oxide.

  Examples of solid carriers that can be used in the formulation include clays (kaolin, diatomaceous earth, bentonite, clay, acid clay, etc.), synthetic hydrous silicon oxide, talc, ceramics, and other inorganic minerals (sericite, quartz, sulfur, etc.). , Activated carbon, calcium carbonate, hydrated silica, etc.), and porous bodies. The particle diameter of the solid carrier is preferably in the range of 0.01 μm to 15 mm, more preferably 0.1 μm to 10 mm.

In the present invention, in the case of formulating, an antifreezing agent, an antifoaming agent, a preservative, an antioxidant, a thickener and the like can be added as necessary.
Examples of the antifreezing agent include ethanol, ethylene glycol, propylene glycol, ethyl cellosolve, butyl carbitol, 3-methyl-methoxybutanol, and the like.
Examples of the antifoaming agent include Antifoam E-20 (silicone emulsion, Kao Corporation, trade name), Antifoam C (Toray Dow Corning Co., Ltd., trade name), and Antifoam C emulsion (Toray Dow Corning Co., Ltd.) , Trade name), Road Sill 454 (Solvay, trade name), Road Sill Antifoam 432 (Solvay, trade name), TSA730 (Tanac Co., trade name), TSA731 (Tanak Co., trade name), TSA732 ( Silicone-based defoaming agents such as Tanac Co., Ltd. and YMA6509 (trade name) and fluorine-based defoaming agents such as Fluoro wet PL80 (Clariant, Inc.).
As preservatives, for example, Bio Hope and Bio Hope L (chemical name: organic nitrogen-sulfur compound, organic bromine compound), Bestside-750 (chemical name: isothiazoline compound, 2.5 to 6.0%) , Preventol D2 (chemical name: benzyl alcohol mono (poly) hemiformal), PROXEL GXL (S) (chemical name: 1,2-benzisothiazolin-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.
Examples of the antioxidant include tetrakis [methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane (Tominox TT, API Corporation, trade name / IRGANOX1010 or IRGANOX1010EDS, Ciba Japan, trade name), butylated hydroxytoluene (BHT), butylated hydroxyanisole (BHA), propyl gallate, and vitamin E, mixed tocopherol, α-tocopherol, ethoxyquin, and ascorbic acid.

  In the present invention, when treating a burrow in or around soil in the present invention, a viscous liquid preparation may be used in order to suppress absorption into soil and exhibit a sufficient pest control effect. The viscosity of the liquid preparation is not particularly limited as long as the active ingredients (A) and (B) are volatilized, but is preferably, for example, about 2 to 1000 mPa · S, more preferably about 2 to 500 mPa · S. preferable. In adjusting the viscosity, for example, glycerin, Zanflowe, xanthan gum, pectin, gum arabic, guar gum, agar, cellulose and its derivatives, starch and its derivatives, carboxyalkalidate, polyacrylate, polymaleate, polyvinyl alcohol, One or more thickeners such as polyvinylpyrrolidone and carboxyvinyl polymer may be used.

  Also, if necessary, within a range that does not inhibit the effects of the present invention, for example, areleslin, resmethrin, framethrin, prarethrin, terarethrin, phthalthrine, phenothrin, permethrin, cyphenothrin, cypermethrin, transfluthrin, methfluthrin, profluthrin, imiprothrin, empentrin Pyrethroid compounds such as, ethofenprox and silafluofen; carbamate compounds such as propoxur and carbaryl; organic phosphorus compounds such as fenitrothion and DDVP; oxadiazole compounds such as methoxadiazone; phenylpyrazole compounds such as fipronil; amideflumet and the like. Nitroguanidine compounds; neonicotinoid compounds such as imidacloprid and dinotefuran; methoprene, hydroprene Insect juvenile hormone-like compounds such as plecocene; various insecticides such as phytoncide, peppermint oil, orange oil, cinnamon oil, clove oil and other insecticide essential oils; sinepirin, piperonyl butoxide May be used in combination. However, in consideration of improving the safety consciousness of the user, the composition in the pest control method of the present invention and the pesticide of the present invention use only the components (A) and (B) of the present invention as active ingredients. Is preferred.

The composition in the pest control method of the present invention and the pesticide of the present invention generally depend on the size of the pest nest, but generally, the components (A) and (B) per square meter where the pest nest exists. Is preferably applied in an amount of 0.005 to 60 g, preferably 0.01 to 30 g. It is preferable to apply as soon as the nest of the pest is confirmed, but even if the nest is not confirmed, treat it once a month to a place where the pest is likely to nest and use it to prevent the nest itself be able to.
The composition in the pest control method of the present invention and the pesticidal agent of the present invention exert an effect that all pests existing in the nest escape from the nest by being applied to the nest of the pest. Among the pests that escape, there are also germs that have fertility such as queens. For this reason, according to the pest control method or the pest control agent of the present invention, a nest after the pest escapes is not re-established, so that an extremely good control effect can be obtained.
Further, since the active ingredients (A) and (B) in the present invention are naturally-derived ingredients, the load on the environment and humans is reduced, and there is no fear of killing the plants. It has the feature that it is highly safe against horticultural plants and the like.

Hereinafter, the present invention will be described in more detail by way of prescription examples and test examples, but the present invention is not limited to these examples.
1 shows test examples of the pest control method and the pest control agent of the present invention. In the examples, parts mean parts by weight unless otherwise specified.
In addition, it was separately confirmed that components other than the components (A) and (B) of the present invention contained in the test sample did not affect the effects of the present invention.

<Test to confirm the effect of escape from the nest>
(1) Preparation of test sample 1 (granules)
Example 1
An aqueous solution using 2.5 parts by weight of nonanoic acid (9 carbon atoms), 1.4 parts by weight of polyoxyethylene sorbitan monooleate (described as a surfactant in Table 1) and 20 parts by weight of purified water Was prepared. Mixture 1 was prepared by adding the aqueous solution to 56.1 parts by weight of zeolite.
0.05 parts by weight of a 50% pyrethrin extract and 0.6 parts by weight of dioctyl sebacate were mixed, and bentonite was added to the mixture 1 and 2 so that the total amount became 100 parts by weight. Thus, a mixture 2 was prepared.
The test sample of Example 1 was prepared by mixing the mixture 1 and the mixture 2.
In Examples 2 and 3 and Comparative Examples 1 to 3, respective test samples were obtained in the same manner as in Example 1 with the formulations shown in Table 1 below.
(2) Preparation of test sample 2 (aerosol)
Example 4
Stock solution: 2.5 w / v% of nonanoic acid, 0.05 w / v% of 50% pyrethrin extract and a suitable amount of kerosene No. 1 (Neothiozole, manufactured by Sanko Chemical Co., Ltd.) to make a total volume of 100 mL.
Propellant: 100 mL of LPG (0.29 MPa, 25 ° C.).
90 mL of this stock solution was placed in an aerosol can, a valve was attached to the can, and 360 mL of the propellant was filled through the valve to obtain an aerosol test sample of Example 4.
In Example 5 and Comparative Examples 4 to 6, respective test samples were obtained in the same manner as in Example 4 with the formulations shown in Table 2 below.

(3) Test method and evaluation method <Test method using powder and granules>
10 g of the test sample was evenly sprayed around the burrow (circle having a diameter of about 25 cm), and the state of pests that escaped from the burrow for 10 minutes after the test sample treatment was confirmed.
<Test method using aerosol agent>
The test sample is evenly sprayed for 2 seconds (0.5 g in terms of stock solution, 0.67 mL) around the burrow (circle having a diameter of about 25 cm), and escapes from the burrow for 10 minutes after the test sample treatment. The state of the pest was confirmed.
<Evaluation method>
The effect of escape from the nest was visually evaluated in three stages according to the following evaluation criteria.
[Evaluation criteria]
"◎": More than 50 ants including queen ants escaped from burrows "△": 50 or less ants not including queens escaped from burrows "x": Ants escaped from burrows In the above evaluation criteria, “◎” was judged to be practical as the pest control method of the present invention or the pest control agent of the present invention.
The composition of the test sample and the evaluation results are summarized, and those relating to the powder and granules are shown in Table 1, and those relating to the aerosol are shown in Table 2.

As is clear from the results of Tables 1 and 2, in any of the formulation types of the powder and granule and the aerosol, the pesticides using nonanoic acid and pyrethrin in combination were applied to the nests (Examples 1 to 5). ), It was confirmed that more than 50 ants including the queen escaped. On the other hand, when the granule containing only nonanoic acid (Comparative Example 1) was applied to the nest, the queen ant did not escape. In addition, powders and granules containing only pyrethrin (Comparative Example 2) and aerosols containing only nonanoic acid or pyrethrin (Comparative Examples 4 and 5) are powders and granules containing neither nonanoic acid nor pyrethrin (Comparative Example) As in 3) and the aerosol (Comparative Example 6), no ants escaped from the burrow.
The number of ants per minute before and after spraying the test samples of Examples 1 to 5 and after entering the burrow was measured. On the other hand, immediately after the application of the test sample, no ants entering or exiting the burrow were confirmed every day, 1 day, and 25 days later, and the ants did not return to the nest and resume their life. From this, it was confirmed that the pest control method or the pest control agent of the present invention was also excellent in persistence of the control effect.
Furthermore, it was confirmed that the plants to which the test sample was sprayed were not killed and that there was no phytotoxicity.
From the above results, the pesticidal composition containing the component (A) and the component (B) of the present invention can be applied to a pest nest to nest pests including queen-like reproductive germs. It has been clarified that it can be escaped from the soil and that the extermination effect is excellent in persistence.

The pest control method or pest control agent of the present invention, by applying to the nest of the pest, escapes the pests present in the nest from the nest, thereby exhibiting the effect of disrupting the function of the nest, Since the nest is not re-established after the pest has escaped and the nest is not newly nested in the vicinity, an extremely good control effect can be obtained. Moreover, since the extermination effect is also excellent in sustainability, a long-term extermination effect can be obtained.
Furthermore, the pesticidal method or pesticidal agent of the present invention has a feature that it is highly safe for plants in a sprayed or sprayed place because there is no possibility of killing the plants.

Claims (4)

A method for controlling pests, comprising applying a composition containing the following components (A) and (B) to a pest nest and allowing the pest to escape from the nest.
(A) at least one fatty acid selected from fatty acids having 4 to 18 carbon atoms or a salt thereof (B) pyrethrin   The pest control method according to claim 1, wherein the pest is a social insect.   The method of controlling pests according to claim 1, wherein the fleeing pests include reproductive insects having fertility. A pesticidal composition for use in escaping from a nest, comprising the following components (A) and (B).
(A) at least one fatty acid selected from fatty acids having 4 to 18 carbon atoms or a salt thereof (B) pyrethrin