JP7083606B2 - Pest control agent - Google Patents

Description

The present invention relates to a novel pest control agent containing pelargonic acid and a salt thereof as active ingredients.
Furthermore, the present invention relates to a pest invasion inhibitor. More specifically, the present invention relates to a pest invasion inhibitor that contains pelargonic acid or a salt thereof as an active ingredient and reliably inhibits the invasion of pests into the drug-treated surface.

Pelargonic acid is known as one of the naturally occurring linear saturated fatty acids contained in foods such as tea, corn, citrus and hops, and is a colorless oily liquid having an unpleasant odor. However, as shown in Non-Patent Document 1, pelargonic acid is known to have low toxicity to animals, and since it is highly safe, its use as a raw material or an active ingredient in various applications is being studied.

For example, Patent Document 1 discloses that pelargonic acid is used as a raw material for a cocoa-like fragrance composition. Further, Patent Document 2 studies the use as an active ingredient of a herbicide. Further, in Patent Document 3, it is studied to enhance the germination inhibitory action of seeds by using pelargonic acid and plant essential oil in combination.

In recent years, ants that invade buildings such as houses from the outdoors have increased the damage caused by bites, and ants are also listed as one of the unpleasant pests. As a control method, a liquid agent or an aerosol agent containing an insecticidal active ingredient is sprayed directly onto ants to exterminate them, or a poison bait is brought back to the ants to bring back the ants in the cavities. The main type is the one to be exterminated.
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 4 etc.). In addition, it has been reported that poison bait containing a phenylpyrazole-based 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 5). 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.
On the other hand, ants and other pests often do not necessarily need to be exterminated unless they invade the house. Although a method for treating an effective drug has been proposed, its repellent effect is still insufficient, and the development of a new drug capable of reliably inhibiting the invasion of pests such as ants has been desired.

Journal of Japanese Agricultural Chemicals Society 24 (4), pp. 421-423, 1999

Japanese Unexamined Patent Publication No. 2006-121958 Special Table No. 05-502216 Publication No. JP-A-2015-193568 Japanese Patent Application Laid-Open No. 2003-073216 Japanese Unexamined Patent Publication No. 08-175910

As mentioned above, pelargonic acid has been studied for various uses, and some of them are being used. In recent years, as safety consciousness has increased, users' expectations for naturally derived ingredients have increased, and it is desired to provide new uses for pelargonic acid.
Therefore, the present invention focuses on highly safe pelargonic acid and aims to provide a pest control agent as a new application.
Furthermore, it is an object of the present invention to provide a pest invasion inhibitor that reliably inhibits pests that invade a building such as a house from the outside.

As a result of diligent research to solve the above problems, the present inventor has found that pelargonic acid and its salts have excellent insecticidal and repellent effects against various pests, and further, the drug treatment aspect. It has been found that it has an excellent invasion-inhibiting effect that reliably inhibits the invasion of pests, and has solved the above-mentioned problems.

Specifically, the present invention has the following gist.
1. 1. An ant invasion avoidance agent characterized by containing pelargonic acid or a salt thereof as an active ingredient.
2. 2. 1. The salt of pelargonic acid is one or more of a sodium salt, a triethanolamine salt, an ammonium salt and a potassium salt. The ant invasion avoidance agent described in.
3. 3. A method for preventing the invasion of ants, which is characterized by containing pelargonic acid or a salt thereof as an active ingredient.
4. 3. The salt of pelargonic acid is one or more of a sodium salt, a triethanolamine salt, an ammonium salt and a potassium salt. How to prevent the invasion of ants described in.

(Effect 1)
Since the pest control agent of the present invention contains pelargonic acid, which is a naturally derived component, as an active ingredient, it is possible to provide a novel pest control agent having a low burden on the environment and humans and animals and having high safety. It can also provide new uses for pelargonic acid.

(Effect 2)
The pest invasion inhibitor of the present invention is invaded into the chemical treatment surface by pests such as ants and isopods by spraying it directly near the entrance of a building such as a house as it is or diluted with water. Since this can be reliably prevented, it is possible to prevent damage caused by ants and the like being bitten by people living indoors and animals such as pets, and to prevent pests from invading indoors.
Further, since the pest invasion inhibitor of the present invention contains pelargonic acid having herbicidal activity or a salt thereof as an active ingredient, the herbicidal effect at the sprayed place can be obtained at the same time. That is, the pest invasion inhibitor of the present invention has the effect of inhibiting the invasion of pests into the house or the inside of the car and suppressing the growth of weeds in the sprayed place by spraying the pest invasion inhibitor around the house or in the parking lot. It has the characteristic of being able to be used.

FIG. 1 is a diagram showing an outline of an insecticidal test 1 and an abalone control test 1 and 2. FIG. 2 is a diagram showing an outline of a repellent test 1, an ant repellent test 1, 2, and an isopod control test 1. FIG. 3 is a diagram showing an outline of an ant invasion inhibition confirmation test, an ant invasion inhibition detailed confirmation test, an isopod control test 2, and a centipede repellent confirmation test. FIG. 4 is a diagram showing an outline of a stink bug repellent confirmation test.

Hereinafter, the pest control agent of the present invention will be described in detail.
The pest control agent of the present invention contains pelargonic acid or a salt thereof as an active ingredient.
The pest control in the present invention means not only controlling the pest by the insecticidal effect that causes the pest to die, but also controlling the pest by the effect of repelling the pest, and further inhibiting the invasion of the pest into the chemical treatment surface. It includes.
Here, "avoidance", "invasion inhibition", and "invasion avoidance" in the present invention will be described in detail.
The repellent or repellent in the present invention means an action in which a pest that has invaded the drug treatment surface dislikes the odor of the drug and moves away from the once invaded drug treatment surface, or a drug that promotes the action.
On the other hand, invasion inhibition in the present invention is an action in which a pest makes a U-turn from the front of the drug-treated surface without even touching the antenna or pedestal to the drug-treated surface, or the antenna or pedestal is treated with the drug. It means an action of making a U-turn without invading the drug treatment surface even if it is brought into contact with the drug, that is, an action in which no pests invade the drug treatment surface, or a drug that promotes the action. Further, invasion avoidance in the present invention means an action in which a pest makes a U-turn from the front of the drug-treated surface without even touching the antennae or peduncles with respect to the drug-treated surface.

Pelargonic acid is a saturated fatty acid consisting of 9 carbon atoms and is known as a compound having a safe and fast-acting herbicide activity. In Japan, it is a compound registered as a pesticide as a herbicide in 1996. Examples of the salt of pelargonic acid include sodium salt, potassium salt, calcium salt, magnesium salt, ammonium salt, ethanolamine salt, triethanolamine salt and the like, and pelargonic acid or its own as an active ingredient of the pest control agent of the present invention. As the salt, a sodium salt, a triethanolamine salt, an ammonium salt and a potassium salt are preferable. These salts may be added as a simple substance to the pest control agent, or pelargonic acid and the corresponding neutralizing agent may be added separately to form a salt at the time of preparation of the pest control agent. For example, pelargonic acid and triethanolamine or sodium hydroxide as a neutralizing agent can be added separately and used as a triethanolamine salt or a sodium salt. As the neutralizing agent, sodium hydroxide, triethanolamine, ammonia, potassium hydroxide and the like are suitable.

The pest control agent of the present invention contains pelargonic acid or a salt thereof as an active ingredient in an amount of 0.01% by mass or more, preferably 0.05% by mass or more, and more preferably 0.1% by mass or more of the total amount of the pest control agent. It is better to use it so that it becomes. Further, if too much pelargonic acid or a salt thereof is used, discomfort due to odor may occur, which is not preferable. Therefore, it is preferably contained in an amount of 10% by mass or less, more preferably 5% by mass or less, and 3% by mass. It is more preferable to contain% or less.
The pest control agent of the present invention can be treated as it is on the target pest, but it is also possible to dilute the preparation containing the predetermined active ingredient with water at the time of use and treat it on the target pest. In this case, it is preferable to prepare and use the active ingredient so that the content of the active ingredient in the water-diluted preparation is 0.01% by mass or more, preferably 0.05% by mass or more.

The pest control agent of the present invention can be prepared and manufactured by a known method. For example, pelargonic acid can be added to water, mixed and stirred with an organic solvent or a surfactant, and dissolved, emulsified, dispersed, suspended or solubilized to obtain a liquid or gel. It can also be microencapsulated and used. Since pelargonic acid is an oily liquid, it is appropriate to prepare and produce it using an organic solvent or a surfactant. 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, or the like is suitable as a formulation type capable of maximizing the pest control performance of the present invention. .. As a spray agent or an aerosol agent, an aerosol can or a drug bottle equipped with a predetermined spray pattern and a spray device for supplying spray particles can be used.
The pest control agent of the present invention is not limited to a liquid agent as long as the effect of the present invention is exhibited, and can be used as a solid agent such as a powder agent, a granule agent, or a fine particle agent.
As one of the preparation and production examples, a solution (Liquid A) is prepared by dissolving pelargonic acid or a salt thereof in an organic solvent using a surfactant as necessary, and this Solution A is mixed with an appropriate amount of water. , A method of making a pest control agent which does not need to be diluted at the time of use by stirring can be mentioned. As the water, one or more of tap water, ion-exchanged water, distilled water, filtered water, sterilized water, natural water such as groundwater and the like can be used.

Examples of the organic solvent that can be used include polybasic acid alcohol esters such as diisobutyl adipate, dioleyl adipate, diisodecyl adipate, diethylhexyl phthalate, didecyl phthalate, 2-ethylhexyl trimellitic acid, and tridecyl trimellitic acid; -Faticon alcohol esters such as cetyl ethylhexanate, cetyl palm fatty acid, methyl laurate, methyl myristate, methyl oleate, octyl oleate; polyhydric alcohol fatty acid esters such as sorbitan monolaurate, sorbitan monooleate; methanol, Alcohols such as ethanol, isopropanol, butanol, hexanol, cyclohexanol, phenoxyethanol, benzyl alcohol; higher alcohols such as octyl alcohol, lauryl alcohol, 3-methoxy-3-methyl-1-butanol; ethylene glycol, propylene glycol, diethylene glycol, he. Polyhydric alcohols such as xylene glycol, polyethylene glycol and polypropylene glycol; glycol ethers such as methyl diglycol, methyl triglycol, ethylene glycol monobenzyl ether, ethylene glycol dimethyl ether, diethylene glycol monoethyl ether, propylene glycol monomethyl ether and diethylene glycol monobenzyl ether. Xylene, toluene, phenylxysilylethane, kerosine, light oil, hexane, cyclohexane, 1,2-dimethyl-4-ethyl-benzene, methylnaphthalene, 1-phenyl-1-xylylethane, 1-xysilyl-1- (3-) α-Methylbenzylphenyl) Aromatic or aliphatic hydrocarbons such as ethane; Paraffinic hydrocarbons such as normal paraffin, isoparaffin and liquid paraffin; Esters such as ethyl acetate, butyl acetate, isopropyl myristate, ethyl lactate; acetone, Ketones such as methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone; halogenated hydrocarbons such as chlorobenzene, dichloromethane, dichloroethane, trichloroethane; nitriles such as acetonitrile and isobutyronitrile; sulfoxides such as dimethyl sulfoxide; sulfolane, γ-butyrolactone , N-Methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, N-octyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone and other heterocyclic solvents; N, N -Acid amides such as dimethylformamide, N, N-dimethylacetamide; acid alkylidenes such as propylene carbonate; vegetable oils such as soybean oil, palm oil, rapeseed oil, millet oil, castor oil, cottonseed oil; orange oil, hisop oil, One or more kinds of vegetable essential oils such as lemon oil can be mentioned.

As the surfactant that can be used, a nonionic surfactant, an anionic surfactant, a cationic surfactant and an amphoteric surfactant can be used. Specifically, for example, polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene styrylphenyl ether, polyoxyethylene alkyl ester, polyoxyethylene sorbitan alkylate, polyoxyethylene phenyl ether polymer, polyoxyethylene. Alkylenearylphenyl ether, polyoxyethylene alkylene glycol, polyoxyethylene polyoxypropylene block polymer, polyoxyethylene cured castor oil, polyoxyethylene alkylamine, polyoxyethylene fatty acid amide, polyoxyethylene type silicon-based surfactant, etc. Non-ionic surfactants; polyoxyethylene alkyl ether phosphate, lignin sulfonate, alkylaryl sulfonate, polyoxyethylene alkylaryl ether sulfate, alkylnaphthalene sulfonate, dialkyl sulfosuccinate, polyoxyethylene styrylphenyl Anionic surfactants such as ether sulfates, alkylbenzene sulfonates, alkyl sulfonates, alkyl sulfates, sodium salts of alkyl maleic acid cocondensates; alkyl betaine, alkylamide propylbetaine, 2-alkyl-N-carboxymethyl Amphoteric surfactants such as -N-hydroxyethylimidazolinium betaine; one or more cationic surfactants such as alkylamine salts, quaternary ammonium salts and the like.

In preparing and producing the pest control agent of the present invention, water, an organic solvent and a surfactant can be used in an appropriate combination, but as long as the effect of the present invention is exhibited, a stabilizer, a thickener, a fragrance, etc. Various other components such as dyes, antifoaming agents, light stabilizers (ultraviolet absorbers), pH regulators, antifreeze agents, preservatives, propellants, antioxidants and the like can be used.
Other various components include, for example, stabilizers such as butyl hydroxyanisole, dibutyl hydroxytoluene, propyl gallate, tocopherol, ascorbic acid, vitamins; carboxyvinyl polymer, polyvinyl alcohol, guar gum, xanthan gum, polyvinylpyrrolidone, colloidal hydrous. Thickeners such as aluminum silicate, colloidal hydrous magnesium silicate; Iran Iran oil, orange oil, chamomile oil, cardamon oil, cumin oil, grapefruit oil, clove oil, moon peach oil, copaiba oil, coriander oil, shiso oil, cedar wood Oil, citronella oil, cinnamon oil, jasmine oil, cedar oil, sparemint oil, sage oil, geranium oil, thyme oil, neroli oil, pine oil, lightly loaded oil, hinoki oil, hiba oil, peppermint oil, bergamot oil, yuzu oil, Natural essential oils such as eucalyptus oil, lime oil, lavender oil, lemon oil, lemongrass oil, lemon balm oil, rosemary oil, lobage oil, anisaldehyde, acetophenone, acetyleugenol, benzyl acetate, benzyl alcohol, benzyl salicylate, benzaldehyde, carboxylic , Sedrol, cinnamic alcohol, cinnamic aldehyde, cis jasmon, citral, citronellal, citronellol, coumarin, cinnamyl acetate, eugenol, α-pinen, β-pinen, limonen, milsen, β-cariophyllene, geraniol, geranyl acetate, hexyl Fragrances such as synamic aldehyde, indole, linalol, linalol oxide, linalyl acetate, methyl eugenol, menthol, nerol, phenylethyl alcohol, timol; Red No. 2, Red No. 3, Red No. 102, Red No. 106, Red No. 227, Dyes such as Red 504, Blue 1, Blue 2, Blue 202, Yellow 4, Yellow 5, Yellow 202, Green 3, Green 201, Green 204, Orange 205, etc.; Silicone compounds Antifoaming agents such as; photostabilizers such as paraaminobenzoic acid, t-butylmethoxydibenzoylmethane, phenyl salicylate (ultraviolet absorbers); gluconic acid, gluconodeltalactone, potassium hydrogen tartrate, sodium carbonate, fumal PH adjusters such as acids, malic acid, citric acid, sodium dihydrogen pyrophosphate, sodium L-tartrate, tripotassium phosphate, phosphoric acid, sodium lactate, adipic acid and salts of sodium and potassium, amine salts; Antifreeze agents such as chlorofluorocarbons, propylene glycols, ethylene glycols; preservatives such as potassium sorbate, parachloromethoxylenol, butyl paraoxybenzoate, methyl paraoxybenzoate, ethyl paraoxybenzoate, propyl paraoxybenzoate, benzoic acid; Liquefied petroleum gas such as propane, propylene, n-butane, isobutane, liquefied gas such as chlorofluorocarbon such as dimethyl ether, CFC, HCFC, HFC, propellant such as nitrogen, carbon dioxide gas, compressed air, compressed gas such as nitrous oxide. Includes one or more antioxidants such as butyl hydroxyanisole, dibutyl hydroxytoluene, tocopherol, γ-orizanol, erythorbic acid, sodium erythorbate, propyl benzoate and the like.

The pest invasion inhibitor that obtains the pest invasion inhibitory effect of the present invention suppresses absorption into the soil when treated in or around the burrows of pests such as ants, and the pests such as ants can touch the antennae and walk. May be a viscous liquid agent in order to sufficiently suppress the contact of ants with the chemical treatment surface and to sufficiently exert the effect of reliably inhibiting the invasion of pests such as ants into the chemical treatment surface. In adjusting the viscosity, for example, glycerin, zanflow, xanthan gum, pectin, arabic gum, guar gum, agar, cellulose and its derivatives, starch and its derivatives, carboxyalkalis, polyacrylic acid salts, polymaleates, polyvinyl alcohol, etc. It may be adjusted by using one or more thickeners such as polyvinylpyrrolidone and carboxyvinyl polymer.

To make a solid agent, for example, clay, talc, calcium carbonate, bentonite, gicrite, sericite, acidic white clay, silicate, sardine soil, zeolite, kaolin, white carbon, calcium chloride, potassium chloride, ammonium sulfate, plant powder ( For example, it can be prepared and manufactured using one or more of monosaccharides such as wheat flour, soybean flour, shavings, coconut husks, glucose, fructose, maltose, shoe cloth, lactose, disaccharides, polysaccharides, etc. can.

Further, as required, known agents such as bactericides, antifungal agents, insecticides and acaricides, herbicides, for example, biterthanol, bromconazole, ciproconazole, diphenoconazole, hexaconazole, imazalyl, microbutanyl, simeconazole, etc. Bactericides such as tetraconazole, thiabendazole, penthiopyrado, manzeb; antifungal agents such as benzethonium chloride, benzalkonium chloride, chlorhexidine hydrochloride, chlorhexidine gluconate, hinokithiol, phenoxyethanol, isopropylmethylphenol; insecticide chrysanthemum extract, natural pyrethrin, praretrin, Imiprothrin, phthalthrin, alesulin, bifenthrin, resmethrin, phenothrin, ciphenotrin, permethrin, cypermethrin, etofenprox, cifluthrin, deltamesrin, bifenthrin, fenvalerate, fenpropatrin, empentrin, shirafluofen, transfluthrin, System compounds, carbamate compounds such as carbalyl, propoxul, mesomil, thiodicalve, oxadiazole compounds such as methoxadiazone, phenylpyrazole compounds such as fipronil, sulfonamide compounds such as amidoflumet, neonicotinoid compounds such as dinotefuran and imidazole chloride. Insecticides such as compounds, pyrethroid compounds such as chlorphenapir, organic phosphorus compounds such as fenitrothione, diazinone, marathon, pyridafenthion, prothiophos, hoxim, chlorpyriphos, dichlorvos; Phosmethyl, Anilophos, Ashram, Atlasin, Azim Sulflon, Bencarbazone, Bethrosin, Ben Fresate, Bensulfuron Methyl, Benthlide, Ventazone, Benchocurve, Benzobicyclon, Benzophenap, Biaraphos, Bicyclopyrone, Biphenox, Bispyribac, Bromacil, Bromobutide, Butachlor , Butamiphos, butenachlor, cafentrol, carfentrazone ethyl, chloridenyl, chloridezone, chlorphthalim, chloro IPC, TCTP, symmesrin, synosulfone, closinahop, chromazone, chromeprop, chloride, CNP, cumyllon, cyanazine, cyclosulfamron, cihalohop Butyl , Daikamba, diclobenil, difluphenican, dimepiperate, dimetamethrin, dimethenamide, P dimethenamide, dithiopyll, diuron, dimron, esprocarb, etofmesate, etobenzanide, ethoxysulfuron, frazasulfuron, phenoxapropethyl, phenoxasulfone , Flucarbazone sodium salt, flucetosulfone, flupoxam, gluhosinate, glyphosate ammonium salt, glyphosate isopropylamine salt, glyphosate potassium salt, glyphosate sodium salt, glyphosate trimesium salt, halosulfuronmethyl, hexadinone, imazamox, imazapill, imazetapill, imazakin , Imazosulfuron, Indanophan, Indaziflam, Iodosulfuron Methyl Sodium Salt, Ioxynyl, Ipfencarbazone, Isoproturon, Isoulon, Isoxaben, Isoxaflutor, Carbutyrate, Lenacil, Linuron, MCC, MCPA, MCPB, MCPP, Mephenaset, Mesosulfone Methyl, Mesotrione, Metamihop, Metamitron, Metazosulfuron, Methiozoline, Methyldymron, Metrachlor, Metribudin, Methosulfuron Methyl, Morinate, Monosulfuron, Monosulfuron Methyl, Naproanilide, Napropamide, Nicosulfuron, Norflurazone, Orthobencurve, Orthosulfazone Ron, oxadiargyl, oxadiazone, oxadichromephone, pendimethalin, penokislam, pentoxazone, phenmedifam, picolinaphen, pinoxaden, plethylacol, prodiamine, promethrin, propanyl, propisochlor, propoxycarbazone sodium salts, propyrusulfuron, propizzamid, pyracronyl. , Pyrasulfol, Pyrazolinate, Pyrazosulfronethyl, Pyrazoxifene, Pyribuchicarb, Pyriftalide, Pyriminobacmethyl, Pyrimisurfan, Pyroxasulfone, Pyroxyslam, Kinchlorac, Kinoclamine, Kizarohopethyl, Saflufenacil, Setoxydim, Cyduron, Simazine , Simetrin, sulfosulfone, tebutiuron, tefuryltrion, tembotrion, tepraloxidim, tarbasyl, tetrapion, tenylchlor, thiazafluron, thiencarbazone One or more herbicides such as methyl, thifencelfuronmethyl, topramison, triafamon, trifloxysulfuron, trifluralin, 2,4-PA, d-limonene can be used.

The pests that are the subject of the present invention are illustrated below.
Alis (Formica japonica, Formica japonicus, Formica japonicus, Camponotus japonicus, Fire ant, Black garden ant, Fire ant, Fire ant, Pheidole fervidine, Fire ant, Luriali, Ozuari, Kiirohimeari, Black garden ant, Kotobiirokeari, Hayashitobiirokeari Fire ant, wrinkle, red imported fire ant, spiny ant, muneakao ant, samurai ant, red imported fire ant, Ameiro ant, sea urchin, wrinkle ant
Isopods (Woodlouse, Woodlouse, Woodlouse, Woodlouse, Ligia exotica, Ligia exotica, etc.),
Abdominal slugs (slugs such as slugs, slugs, snails, slugs, slugs, slugs, slugs, slugs, snails, snails, slugs, snails, slugs, snails, slugs, snails, slugs, snails, slugs, snails Slugs such as Uskawamaimai, Slugs such as Nipponmaimai, and snails),
Spiders (Chiracanthium japonicum, Latrodectus mactans, etc.),
Hemiptera (Aokusakamemushi, Hosohelikamemushi, Otogeshirahoshikamemushi, Togeshirahoshikamemushi, Chabanaeokamemushi, Kusagikamemushi, Minamiaokamemushi, Akasujikamemikame, Akahigehosomidori Kasumikame, etc. Stink bugs such as apple stink bug, stink bug, stink bug, stink bug, etc.),
Lepidoptera (Tea tussock moth, etc., Hitriggers such as American tussock moth, Lymantria disparity, Lymantria disparata, Lymantria disparity, Awayoto, Tricoprusia, Heliotis, Helicobelpa, etc. Lymantria disparata, adult or larva of clothes moth, etc.),
Diptera (Gnats, leafminers, leafminers such as leafminers, leafminers such as leafminers, fruit flies, fruit flies, black fly mushrooms, flies, leafminers, leafminers, leafminers, leafminers, etc. , Psychodidae, etc., Gnats, Agromyzidae, Stable flies, etc.),
Hymenoptera (Thrips, Thrips palmi Karny, Thrips palmi Karny, Thrips palmi Karny, Thrips palmi Karny, etc.),
Myriapoda (Centipede, Centipede, etc., and Myriapoda, Akayasude, etc.),
Mites (Balaustium muro, etc.),
Coleoptera (Coleoptera, etc.),
Leather wing (earwigs, etc.),
Dictyoptera (cockroaches, etc.),
Orthoptera (mole crickets, grasshoppers, crickets, etc.) can be exemplified.
Among these, the pest control agent of the present invention can be effectively used for abalone, isopods, ants, and hemiptera.

The pest invasion inhibitor of the present invention suppresses the contact of pests such as ants with the antennae and pedicles on the drug-treated surface, and reliably inhibits the invasion of pests into the drug-treated surface. Pelargonic acid or a salt thereof is sprayed in an amount of preferably 0.01 to 30 g, more preferably 0.05 to 25 g per 1 square meter of the chemical treatment surface. The frequency of application should be about once every 1 to 2 weeks after confirming the occurrence of pests such as ants. The means of application is not particularly limited.
The pest invasion inhibitor of the present invention is used near the entrance of a building such as a house where pests do not want to invade, for example, a kitchen, a doorway, an entrance, a corridor, a living room, a window, a veranda, a wood deck, a port, a house such as asphalt, etc. By spraying or spraying around the building or in the parking lot, it is possible to prevent pests such as ants from coming into contact with the chemical treatment surface, and to prevent pests such as ants from coming into contact with the chemical treatment surface. It is extremely practical in that it exerts an effect of reliably inhibiting the invasion of pests such as ants and the like, and reliably inhibits the invasion of pests such as ants into buildings such as houses and cars.

Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited thereto.

<Preparation of test sample 1>
Test specimens having the compositions shown in Table 1 were prepared and used as Examples 1 to 6 and Comparative Example 1.
When preparing the test sample, each component was mixed and stirred with a magnetic stirrer so that the composition became uniform.
In Examples 1 to 6, pelargonic acid and 25% aqueous ammonia are neutralized to form an ammonium salt of pelargonic acid, which acts as an active ingredient.

<Insecticide test 1>
Insecticide test 1 was carried out on various pests listed in Table 2. The outline of the test is shown in FIG.
≪Ants, isopods, slug insecticidal tests≫
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 pests from escaping. Five test insects were released into the cup, and 2 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, the number of lethals was counted after 12 hours, and the mortality rate (%) was calculated by the following formula. The test was conducted at 25 ° C. under bright conditions, and the average value of 3 times is shown in Table 2 as the case fatality rate (%).
≪Stink bug insecticidal test≫
Similar to the above "Ari, Isoleg, and Namekuji Insect Killing Test", the number of stink bugs, stink bugs, southern green stink bugs, and stink bugs is 3 to 5, and the number of lethal numbers after 24 hours is set to 3 to 5. The numbers were counted and the lethality rate (%) was calculated by the following formula. The test was performed once under bright conditions at 25 ° C.
≪Nippon Maimai Insecticide Test≫
Similar to the above "Ant / Isopod / Slug Insecticide Test", Nipponmaimai used one test insect as a test insect, confirmed the lethality after 12 hours, and calculated the mortality rate (%) by the following formula. .. The test was performed once under bright conditions at 25 ° C.
≪Tobizumukade insecticidal test≫
Calcium carbonate was applied to the upper part of the inner wall surface of a plastic cup (trade name: KP-860MB (manufactured by Koike Plastic Co., Ltd.)) having an inner diameter of 130 mm and a height of 100 mm to prevent pests from escaping. One test insect was released into the cup, and 6 mL of each test sample was treated with a nebulizer from a distance of 10 cm. After the treatment, the test insects were transferred to a clean plastic cup, and after 24 hours, mortality was confirmed, and the mortality rate (%) was calculated by the following formula. The test was performed once under bright conditions at 25 ° C.
[Formula]: Case fatality rate (%) = number of dead test insects / total number of test insects x 100

As shown in Table 2, it was clarified that the pest control agent of Example 1 containing the ammonium salt of pelargonic acid of the present invention as an active ingredient has an excellent insecticidal effect on various pests.

As a result of confirming the insecticidal effect on various pests in Examples 2 to 6 shown in Table 1 in the same manner as in Example 1, it was confirmed that the excellent insecticidal effect was exhibited as follows.
As a result of treating Example 2 against Formica japonica, Brown marmorated stink bug, Southern green stink bug, and Riptortus peduncle, the case fatality rates were 93.3%, 100%, 100%, and 100%.
As a result of treating Example 3 with respect to Nipponmaimai and Riptortus peduncle, the mortality rate was 100% in both cases.
As a result of treating Examples 3 to 4 for the pill bug and the woodlouse, the case fatality rate was 100% in both cases.
As a result of treating Example 5 against pill bugs, woodlouse and slugs, the case fatality rates were 80%, 86.7% and 100%.
As a result of treating Example 6 for pill bugs and slugs, the case fatality rates were 73.3% and 93%.

<Preparation of test sample 2>
Test specimens having the compositions shown in Table 3 were prepared and used as Examples 7-9. When preparing the test sample, each component was mixed and stirred with a magnetic stirrer so that the composition became uniform.

<Judicial disqualification test 1>
A repellent test 1 was conducted on various pests shown in Table 4. 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 pests from escaping. Two places of cotton wool or solid food impregnated with water were installed in the container as feeding grounds for the test insects. Next, a filter paper having a diameter of 5.5 cm and a diameter of 7 cm only for slugs was impregnated with 2 mL each of Examples 7 to 9 and a control (100% acetone), and the filter paper was placed so as to surround the feeding area.
Next, the test insects were released into the container, the number of colonization 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, and the average value of the two tests is shown in Table 4 as the repellent rate (%).
In the test, 50 each of Formica japonica and Pristomyrmex vulgaris, 40 pill bugs and 40 woodlouse, and 20 slugs were used.
Repellent rate (%) = {1- (number of fixed test specimens) / (number of fixed test specimens + number of fixed controls)} x 100
Hereinafter, the "test sample" in the formula means a sample of an example or a comparative example.

As shown in Table 4, it was clarified that the pest control agent containing pelargonic acid of the present invention as an active ingredient has an excellent repellent effect against various pests.

<Preparation of test sample 3>
Test specimens having the compositions shown in Table 5 were prepared and used as Example 10 and Comparative Example 2. When preparing the test sample, each component was mixed and stirred with a magnetic stirrer so that the composition became uniform.

<Abalone control test 1>
Abalone and foot control test 1 was conducted on the threeband gardenslug. 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 pests from escaping. One test insect was released into the cup, and 3 mL of each test sample of Example 10 and Comparative Example 2 was treated with a sprayer from a distance of 10 cm. After the treatment, the test insects were observed and the time until complete stop (FT: sec) was measured. In addition, the presence or absence of mucus shedding behavior, the presence or absence of escape behavior, and lethality after 15 minutes and 24 hours were confirmed for the threeband gardenslug, and the results are shown in Table 6.
In Table 6, "No" indicates that there was no mucus removal behavior or escape behavior, "Yes" indicates that there was mucus removal behavior or escape behavior, and "○" indicates that there was no mucus removal behavior or escape behavior. Means that he was alive.

In general, it is known that abalone asinina such as slugs are difficult to obtain an insecticidal effect by removing the mucus on the body surface even if the body surface is treated with a pyrethroid insecticide.
As is clear from the results of Example 10 in Table 6, the time (FT) from the treatment of pelargonic acid to the complete cessation of behavior is 191 seconds (about 3 minutes), and the mucus shedding behavior and escape. No behavior was seen and it was confirmed to be lethal within 15 minutes.
On the other hand, when pyrethrin, which is one of the pyrethroid insecticides of Comparative Example 2, was treated, the mucus shedding behavior and the escape behavior of the body surface were observed as in the known technique, and the behavior was not fatal even after 24 hours.
As shown in Table 6, the pest control agent containing pelargonic acid as an active ingredient of the present invention has an excellent control effect on abalone and foot species such as slugs, which cannot be obtained by known pyrethroid insecticides and can surely obtain lethal activity. It became clear that it exerts.

<Preparation of test sample 4>
A test sample having the composition shown in Table 7 was prepared and used as Example 11 and Comparative Examples 3 and 4. When preparing the test sample, each component was mixed and stirred with a magnetic stirrer so that the composition became uniform.

<Abalone control test 2>
Abalone and foot control test 2 was conducted on the threeband gardenslug. The outline of the test is shown in FIG.
The test was carried out in the same manner as the above-mentioned "Abalone control test 1". After the treatment, the test insects were observed and the time until complete stop (FT: sec) was measured. In addition, the presence or absence of mucus shedding behavior, the presence or absence of escape behavior, and lethality after 15 minutes and 24 hours were confirmed for the threeband gardenslug, and the results are shown in Table 8.
In Table 8, "No" indicates that there was no mucus removal behavior or escape behavior, "Yes" indicates that there was mucus removal behavior or escape behavior, and "Yes *" indicates that there was mucus removal behavior but completely removal. "○" means that he was dead, and "x" means that he was alive.

As described above, even if a pyrethroid insecticide is applied to the body surface of abdominal feet such as slugs, it is difficult to obtain an insecticidal effect by removing the mucus on the body surface. It is also known that while there are substances such as carboxylics that inhibit the mucus shedding behavior on the body surface and cause lethality, there are components such as limonen that cannot inhibit the mucus shedding behavior on the body surface.
As is clear from the results of Example 11 in Table 8, the time (FT) from the treatment of pelargonic acid to the complete cessation of behavior is 240 seconds (about 4 minutes), and the mucus shedding behavior and escape. No action was seen and he died within 15 minutes.
On the other hand, when treated with L-carboxylic, which is known to inhibit and kill the mucus shedding behavior on the body surface, no escape behavior was observed as in the case of pelargonic acid treatment, and the body surface was lethal within 15 minutes. The mucus shedding behavior was observed, and the time (FT) until the behavior was completely stopped was 425 seconds (7 minutes or more). In addition, when limonene was treated, mucus shedding behavior and escape behavior on the body surface were observed, and it was not fatal even after 24 hours.
As shown in Table 8, it was clarified that the pest control agent containing pelargonic acid of the present invention as an active ingredient has a better control effect than known abalone and foot control agents such as L-carboxylic acid.

<Preparation of test sample 5>
Test specimens having the compositions shown in Table 9 were prepared and used as Example 12 and Comparative Example 5. When preparing the test sample, each component was mixed and stirred with a magnetic stirrer so that the composition became uniform.

<Ant repellent test 1>
The ant repellent test 1 was carried out on the ants shown in Table 10. 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 pests from escaping. Two places of cotton wool impregnated with water were installed in the container as feeding grounds for the test insects. Next, a filter paper having a diameter of 5.5 cm was impregnated with 2 mL each of Example 12 or Comparative Example 5 and a control (100% acetone), and the filter paper was placed so as to surround the feeding area.
Next, the test insects (50) were released into the container, the number of colonizations on the feeding ground after 30 minutes was counted, and the repellent rate (%) was calculated by the following formula.
In addition, the effect of avoiding intrusion into the filter paper impregnated with the test sample (the effect of encouraging the behavior of ants to make a U-turn from the front of the filter paper without even touching the antennae or the walking legs with respect to the filter paper impregnated with the test sample). We also confirmed the presence or absence. The test was conducted at 25 ° C. under bright conditions and is shown in Table 10 as the repellent rate (%).
Repellent rate (%) = {1- (number of fixed test specimens) / (number of fixed test specimens + number of fixed controls)} x 100
In Table 10, "Yes" means that the intrusion avoidance effect was recognized, and "None" means that the intrusion avoidance effect was not recognized.

As is clear from the results of Example 12 in Table 10, it was confirmed that pelargonic acid has a repellent rate of 100% regardless of the types of ants of Formica japonica and Pristomyrmex vulgaris, and exhibits an excellent repellent effect. On the other hand, the pyrethroid insecticide fenpropatrin had a repellent rate of less than 50%, and the repellent effect was different depending on the type of ants such as Formica japonica and Pristomyrmex vulgaris.
Furthermore, it was confirmed that it also had an invasion avoidance effect on the filter paper impregnated with pelargonic acid, but no intrusion avoidance effect was observed on the filter paper impregnated with fenpropatrin.
As shown in Table 10, it is clear that the pest control agent containing pelargonic acid of the present invention as an active ingredient exhibits an ant repellent effect and an invasion avoidance effect in the drug-treated surface, which are superior to those of pyrethroid insecticides. became.

In order to investigate in detail the ant invasion avoidance effect confirmed in the above "ant repellent test 1", the following "ant invasion inhibition confirmation test" and "ant invasion inhibition detailed confirmation test" were carried out.
<Preparation of test sample 6>
Test specimens having the compositions shown in Table 11 below were prepared and used as Example 13 and Comparative Examples 6 to 11. When preparing the test sample, each component was mixed and stirred with a magnetic stirrer so that the composition became uniform.

<Ant invasion inhibition confirmation test>
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 15 cm, a width of 20 cm, and a height of 10 cm to prevent ants from escaping. In the container, one cotton wool impregnated with water was installed as a feeding ground for ants. 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 the feeding area.
Next, ants (Formica japonica, 10) were released into the container, and the number of ants that invaded the filter paper was counted as (a) the number of invasions for 10 minutes. The test was conducted at 25 ° C. under bright conditions.
The number of times of (a) intrusion means the number of times that the antennae and the walking legs are brought into contact with the filter paper and further advanced to enter the filter paper.
Table 11 shows the composition of the test sample and (a) the number of invasions of each.

As is clear from the results of Example 13 in Table 11, it was confirmed that ants did not invade the filter paper impregnated with pelargonic acid at all and exhibited an excellent invasion inhibitory effect. On the other hand, ants were impregnated 49 times in 10 minutes on a filter paper impregnated with fatty acid (Comparative Example 6), which is the same saturated fatty acid as pelargonic acid, and 25 times on a filter paper impregnated with caprylic acid (Comparative Example 7). , Caprylic acid, lauric acid, myristic acid, and palmitic acid (Comparative Examples 8 to 11) have invaded the filter paper impregnated with each of them 13 to 15 times, and unlike pelargonic acid, they do not show an invasion inhibitory effect. Also became clear.
Pelargonic acid is a saturated fatty acid that differs only in the number of carbon atoms from fatty acid, caprylic acid, capric acid, lauric acid, myristic acid, and palmitic acid. It was confirmed that it is significantly different from other fatty acids in that it exerts an effect of inhibiting invasion into the plane.
The excellent invasion inhibitory effect of pelargonic acid into the drug-treated surface is a particularly remarkable effect confirmed for the first time by the present inventor through many experiments.

<Preparation of test sample 7>
Test specimens having the compositions shown in Table 12 below were prepared and used as Example 14 and Comparative Examples 12 to 15. When preparing the test sample, each component was mixed and stirred with a magnetic stirrer so that the composition became uniform.

<Detailed confirmation test for ant invasion inhibition>
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 15 cm, a width of 20 cm, and a height of 10 cm to prevent ants from escaping. In the container, one cotton wool impregnated with water was installed as a feeding ground for ants. 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 the feeding area.
Next, ants (Formica japonica, 10 animals) were released into the container, and the behavior of the ants approaching the filter paper was observed. The number of ants that made a U-turn without touching the filter paper with the antennae or pedestal was (b) the number of times of avoidance of intrusion, and the ants that made a U-turn without contacting the filter paper with the antennae or pedestal. The number of types was counted as (c) the number of avoidances after contact for 10 minutes. Further, the sum of (b) the number of times of avoidance of intrusion and (c) the number of times of avoidance after contact was defined as (d) the number of times of inhibition of invasion. Further, the ratio of (b) the number of intrusion avoidances to the number of (d) intrusion inhibitions was defined as "invasion avoidance rate (%)".
The test was conducted at 25 ° C. under bright conditions.
Table 12 shows the composition of the test sample, (b) the number of times of avoidance of invasion, (c) the number of times of avoidance after contact, (d) the number of times of inhibition of invasion, and the rate of avoidance of invasion (%).

As is clear from the results of Example 14 in Table 12, the number of U-turns from the front of the filter paper impregnated with pelargonic acid (d) the number of penetration inhibitions is the saturated fatty acids fatty acids, fatty acid, caprylic acid, which differ only in the number of carbon atoms. It was about 1.5 to 4 times higher than caprylic acid and lauric acid (Comparative Examples 12 to 15), and it was clarified that pelargonic acid has an extremely excellent effect of inhibiting invasion into the drug-treated surface. Among them, pelargonic acid makes a U-turn from the front of the drug-treated surface without causing ants to even touch the antennae and pedicles on the drug-treated surface. It was also confirmed that the U-turn was made after that (c), which was about 5 times higher than the number of avoidances after contact. This means that (d) the ratio of the number of times of invasion avoidance to (b) the number of times of invasion avoidance is "invasion avoidance rate (%)", and pelargonic acid (Example 14) is fatty acid, caprylic acid, capric acid, lauric acid. It is clear from the fact that it is extremely high compared to the acid (Comparative Examples 12 to 15).
That is, pelargonic acid can exert an excellent effect of suppressing the contact of antennae and peduncles with the drug-treated surface by ants and surely inhibiting the invasion of ants into the drug-treated surface. It became clear.

<Preparation of test sample 8>
Test specimens having the compositions shown in Table 13 were prepared and used as Example 15 and Comparative Example 16. When preparing the test sample, each component was mixed and stirred with a magnetic stirrer so that the composition became uniform.

<Ant repellent test 2>
The ant repellent test 2 was carried out on the ants shown in Table 14. The outline of the test is shown in FIG.
An escape treatment 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 pests from escaping. Two places of cotton wool impregnated with water were installed in the container as feeding grounds for the test insects. Next, a filter paper having a diameter of 5.5 cm was impregnated with 2 mL each of Example 15 or Comparative Example 16 and a control (100% acetone), and the filter paper was placed so as to surround the feeding area. The test insects were released into the container, the number of colonization after 30 minutes was counted, and the repellent rate (%) was calculated by the following formula. This is the "early" repellent rate.
Then, a filter paper having a diameter of 5.5 cm was impregnated with 2 mL each of Example 15 or Comparative Example 16 and a control (100% acetone), and air-dried in a draft for one week. The same test as above was repeated using a filter paper air-dried for 1 week, the number of fixings after 12 hours was quantified, and the repellent rate (%) was calculated by the following formula. This was defined as the repellent rate "after one week". The test was conducted at 25 ° C. under bright conditions, and the average value of the two times was shown in Table 14 for the repellent rate (%).
Repellent rate (%) = {1- (number of fixed test specimens) / (number of fixed test specimens + number of fixed controls)} x 100

As is clear from the results of Example 15 in Table 14, it was confirmed that pelargonic acid had a repellent rate of 100% against Formica japonica and Pristomyrmex vulgaris both in the initial stage and after 1 week. On the other hand, benzyl salicylate (Comparative Example 16), which is known as a repellent component derived from a natural component against ants, has an initial repellent rate of 100% for both Formica japonica and Pristomyrmex vulgaris, but the repellent rate after one week is It was clarified that the repellent rate decreased to 46.2% for Formica japonica and 84.8% for Pristomyrmex vulgaris. Since benzyl salicylate is a highly volatile drug, this decrease in the repellent rate is considered to be due to the fact that benzyl salicylate sufficient for repellent activity does not remain on the filter paper that has been air-dried for one week.
From these results, it was clarified that the pest control agent containing pelargonic acid of the present invention as an active ingredient exhibits a stable ant repellent effect for a long period of time.

<Preparation of test sample 9>
Test specimens having the compositions shown in Table 15 were prepared and used as Example 16 and Comparative Example 17. When preparing the test sample, each component was mixed and stirred with a magnetic stirrer so that the composition became uniform.

<Isopoda control test 1>
The isopod control test 1 was carried out for the isopods shown in Table 16. 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 pests from escaping. Two places of cotton wool impregnated with water were installed in the container as feeding grounds for the test insects. Next, a filter paper having a diameter of 5.5 cm was impregnated with 2 mL each of Example 16 or Comparative Example 17 and a control (100% acetone), and the filter paper was placed so as to surround the feeding area.
Next, the test insects (20) were released into the container, the number of colonizations on the feeding ground after 30 minutes was counted, and the repellent rate (%) was calculated by the following formula. In addition, the effect of avoiding intrusion into the filter paper impregnated with the test sample (the effect of encouraging the behavior of isopods to make a U-turn from the front of the filter paper without even touching the antennae or walking legs with respect to the filter paper impregnated with the test sample. ) Was also confirmed. The test was conducted at 25 ° C. under bright conditions and is shown in Table 16 as the repellent rate (%).
Repellent rate (%) = {1- (number of fixed test specimens) / (number of fixed test specimens + number of fixed controls)} x 100
In Table 16, "Yes" means that the intrusion avoidance effect was recognized, and "None" means that the intrusion avoidance effect was not recognized.

As is clear from the results of Example 16 in Table 16, pelargonic acid is also used as an active ingredient of a commercially available pill bug repellent against pill bugs and woodlouse, and pyrethrin known as a pyrethroid insecticide (Comparative Example 17). It was clarified that it showed high repellent activity. Furthermore, it was confirmed that it also has an invasion avoidance effect on the filter paper impregnated with pelargonic acid.
As shown in Table 16, it has been clarified that the pest control agent containing pelargonic acid of the present invention as an active ingredient exhibits an isopod control effect superior to that of the pyrethroid insecticide.

<Preparation of test sample 10>
Test specimens having the compositions shown in Table 17 were prepared and used as Example 17, Comparative Examples 18 and 19. When preparing the test sample, each component was mixed and stirred with a magnetic stirrer so that the composition became uniform.

<Isopoda control test 2>
The isopod control test 2 was carried out for the isopods shown in Table 18. 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 15 cm, a width of 20 cm, and a height of 10 cm to prevent pests from escaping. In the container, one cotton wool impregnated with water was installed as a feeding ground for the test insects. Next, a filter paper having a diameter of 5.5 cm was impregnated with 2 mL each of Example 17, Comparative Example 18 or Comparative Example 19 and a control (100% acetone), and the filter paper was placed so as to surround the feeding area.
Next, the test insects (10 animals) are released into the container, and the number of invasion into the filter paper and the number of invasion inhibition (the antennae of the filter paper impregnated with the test sample are even brought into contact with the antennae and walking legs. The sum of the number of U-turns from the front of the filter paper and the number of U-turns without invading the filter paper even if the antennae and legs are in contact with the filter paper) is counted for 15 minutes and calculated by the following formula. The invasion inhibition rate (%) was calculated. The test was conducted at 25 ° C. under bright conditions, and the invasion inhibition rate (%) is shown in Table 18.
Invasion inhibition rate (%) = {(invasion inhibition count) / (invasion count + invasion inhibition count)} × 100

As is clear from the results of Example 17 in Table 18, pelargonic acid is known to have high volatilization among pyrethroid insecticides against pill bugs and woodlouse, such as empentrin (Comparative Example 18) and profluthrin (Comparative Example 19). ), While the number of invasion inhibitions was high, the number of invasions was extremely low.
Further, in the test system of empentrin (Comparative Example 18) and profluthrin (Comparative Example 19), lethal individuals were confirmed after the end of the test, but in the pelargonic acid test system, no lethal individuals were confirmed. It was also confirmed that in this test system in which pelargonic acid is not directly treated into isopods, only the repellent effect and the invasion inhibitory effect are exhibited.
As shown in Table 18, it has been clarified that the pest control agent containing pelargonic acid of the present invention as an active ingredient exhibits an isopod control effect superior to that of the pyrethroid insecticide.

<Preparation of test sample 11>
Test specimens having the compositions shown in Table 19 below were prepared and used as Example 18 and Comparative Example 20. When preparing the test sample, each component was mixed and stirred with a magnetic stirrer so that the composition became uniform.

<Centipede repellent confirmation test>
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 30 cm to prevent pests from escaping. A filter paper having a diameter of 10 cm is impregnated with 4 mL each of Example 18 and Comparative Example 20 (100% acetone), placed in the container, and a commercially available poison bait (Earth Pharmaceutical Co., Ltd. Mukadekorori (poison bait agent) container type) is placed on the filter paper. ) Was placed.
Next, one Tobizumukade fasted for one day was released into the container, and the death was confirmed 24 hours later. The test was conducted at 25 ° C. under bright conditions, and the results of the repellent evaluation are shown in Table 20.
In this confirmation test, the bait (poisonous bait) can be eaten only after invading the filter paper, so the repellent evaluation result shows that if the red-headed centipede is lethal, there is no repellent effect and "x", if the red-headed centipede is not lethal. It is described as "○" because it has a repellent effect.

As shown in Table 19, it was revealed that pelargonic acid also exerts an excellent repellent effect on centipedes.

<Preparation of test sample 12>
A test sample having the composition shown in Table 20 below was prepared and used as Example 19. When preparing the test sample, each component was mixed and stirred with a magnetic stirrer so that the composition became uniform.

<Stink bug repellent confirmation test>
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-860MB (manufactured by Koike Plastic Co., Ltd.)) having an inner diameter of 130 mm and a height of 100 mm to prevent pests from escaping. Two cotton wool impregnated with water were placed in the cup as a feeding ground for the test insects, and 2 mL of the test sample of Example 19 was impregnated in one feeding ground.
Next, the test insects (5) shown in Table 21 were released into the cup, the number of colonizations on the feeding ground after 24 hours was counted, and the repellent rate (%) was calculated by the following formula.
Repellent rate (%) = {1- (number of fixed test specimens) / (number of fixed test specimens + number of fixed controls)} x 100
The test was conducted at 25 ° C. under bright conditions, and the repellent rate (%) is shown in Table 21.

As shown in Table 21, it was clarified that pelargonic acid exerts a good repellent activity against stink bugs regardless of the species.

The pest control agent containing pelargonic acid as an active ingredient of the present invention has an excellent pest control effect, particularly an invasion inhibitory effect or an invasion avoidance effect, as compared with known agents such as pyrethroid insecticides. be. Specifically, the pest control agent of the present invention has excellent lethal activity against abalone, isopods, ants, hemiptera, myriapoda, and further, abalone and isopoda. It exerts an excellent repellent effect and invasion inhibitory effect against species, ants, and myriapoda.
The invasion inhibitory effect of the present invention is to take a U-turn action or contact the drug-treated surface containing pelargonic acid or a salt thereof as an active ingredient from the front of the drug-treated surface without the pests touching the antennae or pedicles. Even if it is allowed to do so, it is an excellent effect due to taking a U-turn action from the front of the drug treatment surface.
Since the pest control agent of the present invention contains pelargonic acid having herbicidal activity or a salt thereof as an active ingredient, the herbicidal effect of the sprayed place can be obtained at the same time. As a result, by treating the pest control agent of the present invention near the entrance of a building such as a house or in a parking lot, the pests that come into contact with the chemicals are killed and the pests invade the inside of the chemical treatment surface. It is characterized in that pests do not invade the inside of a house or a car, and the effect of suppressing the growth of weeds in the treated place can be obtained.
These effects exerted by the pest control agent of the present invention are findings newly discovered by the present inventor, and are particularly remarkable effects.

Claims (4)

An ant invasion avoidance agent characterized by containing pelargonic acid or a salt thereof as an active ingredient. The ant invasion avoidant according to claim 1 , wherein the salt of pelargonic acid is one or more of a sodium salt, a triethanolamine salt, an ammonium salt, and a potassium salt. A method for preventing the invasion of ants, which is characterized by containing pelargonic acid or a salt thereof as an active ingredient. The method for preventing the invasion of ants according to claim 3, wherein the salt of pelargonic acid is one or more of a sodium salt, a triethanolamine salt, an ammonium salt, and a potassium salt.

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