JP7415296B2 - Isopod insect control agent - Google Patents

Description

The present invention relates to a novel pest control agent containing pelargonic acid and its salt as an active ingredient.
Furthermore, the present invention relates to pest infestation inhibitors. 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 pest invasion into a chemically treated surface.

Pelargonic acid is known as a naturally occurring linear saturated fatty acid found in foods such as tea, corn, citrus fruits, and hops, and is a colorless oily liquid with an unpleasant odor. However, as shown in Non-Patent Document 1, pelargonic acid is known to have low toxicity to animals and is highly safe, so its use as a raw material or active ingredient in various applications is being considered.

For example, Patent Document 1 discloses the use of pelargonic acid as a raw material for a cocoa-like fragrance composition. Moreover, in Patent Document 2, a study is made regarding the use as an active ingredient of a herbicide. Furthermore, in Patent Document 3, it is considered that the combination of pelargonic acid and plant essential oil can enhance the germination inhibitory effect on seeds.

Furthermore, in recent years, bite damage caused by ants that invade buildings such as houses from outside has increased, and ants are also considered as one of the unpleasant pests. Control methods include spraying a liquid or aerosol containing an insecticidal active ingredient directly onto the ants, or using poisonous bait to force the ants to take them back to their burrows. The main types are those that are exterminated.
For example, it is known that a liquid or aerosol containing a pyrethroid compound as an insecticidal active ingredient can have a rapid insecticidal effect when sprayed directly onto ants or ant nests (for example, patented Reference 4 etc.). In addition, it has been reported that poisonous baits containing phenylpyrazole-based compounds as insecticidal active ingredients do not exhibit fast-acting insecticidal properties through contact action, and that ants carry the poisonous baits into their burrows and collapse the entire nest. (Patent Document 5). However, since the above-mentioned liquid agents and aerosol agents provide a rapid insecticidal effect through contact action, they cannot exterminate ants that do not come into contact with the insecticidal active ingredient. Further, depending on the attractant component contained together with the insecticidal component, the above-mentioned poisonous bait may have a dispersion in its transport effect and may not have a sufficient pesticidal effect.
On the other hand, in many cases, it is not necessary to exterminate ants and other pests as long as they do not invade the house. Although effective treatment methods have been proposed, their repellent effects are still insufficient, and there has been a desire to develop new agents that can reliably inhibit the invasion of pests such as ants.

Journal of the Japanese Society of Pesticides 24(4), pp. 421-423, 1999

Japanese Patent Application Publication No. 2006-121958 Special Publication No. 05-502216 Japanese Patent Application Publication No. 2015-193568 Japanese Patent Application Publication No. 2003-073216 Japanese Patent Application Publication No. 08-175910

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

As a result of extensive research in order to solve the above problems, the present inventors have discovered that pelargonic acid and its salts have excellent insecticidal and repellent effects against various pests, and have also found that pelargonic acid and its salts have excellent insecticidal and repellent effects on various insect pests. The inventors have discovered that this product has an excellent invasion inhibiting effect that reliably inhibits the invasion of pests into the interior of the home, and has thus come to solve the above-mentioned problems.

Specifically, the present invention has the following points.
1. A pest control agent characterized by containing pelargonic acid or its salt as an active ingredient.
2. 1. The pest control is pest repellent. Pest control agents listed.
3. 2. Pest repellent is characterized by inhibiting invasion. Pest control agents listed.
4. 1. The salt of pelargonic acid is any one or more of sodium salt, triethanolamine salt, ammonium salt, and potassium salt. ~3. The pest control agent described in any of the above.

(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 that is highly safe and has less burden on the environment and humans and livestock. Moreover, new uses of pelargonic acid can be provided.

(Effect 2)
The pest invasion inhibitor of the present invention can be sprayed directly near the entrance of buildings such as houses, either as it is or diluted with water, to prevent pests such as ants and isopods from entering into the chemically treated surface. This can reliably prevent people living indoors, pets, and other animals from being bitten by ants, and prevent pests from invading indoors.
Furthermore, since the pest invasion inhibitor of the present invention contains pelargonic acid or its salt, which has herbicidal activity, as an active ingredient, it is possible to simultaneously obtain a herbicidal effect in the area where it is sprayed. That is, by spraying the pest invasion inhibitor of the present invention around a house or in a parking lot, it is effective to inhibit the invasion of pests into the house or car, and to suppress the proliferation of weeds in the sprayed area. It has the characteristic that it can be used.

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

Hereinafter, the pest control agent of the present invention will be explained in detail.
The pest control agent of the present invention contains pelargonic acid or a salt thereof as an active ingredient.
Pest control in the present invention includes not only pest control with an insecticidal effect that causes the death of pests, but also control with an effect that repels pests, and furthermore, prevention of pests from entering into a chemically treated surface. It includes.
Here, "repellent", "intrusion inhibition", and "intrusion avoidance" in the present invention will be explained in detail.
In the present invention, the term "repellent" or "repellent" refers to a chemical that causes insect pests that have invaded a chemically treated surface to dislike the smell of the chemical and move away from the chemically treated surface that they have invaded, or a chemical that encourages this behavior.
On the other hand, intrusion inhibition in the present invention refers to an action in which a pest makes a U-turn from in front of the chemical-treated surface without even touching the chemical-treated surface with its antennae or walking legs, or a behavior in which the insect pest makes a U-turn from in front of the chemical-treated surface without even touching the chemical-treated surface with its antennae or walking legs. This refers to a behavior in which pests make a U-turn without invading the chemically treated surface even if they are allowed to do so, in other words, a behavior in which pests do not invade the chemically treated surface at all, and a chemical that encourages this behavior. Furthermore, intrusion avoidance in the present invention refers to a behavior in which the insect pest makes a U-turn from in front of the chemically treated surface without even touching the chemically treated surface with its antennae or walking legs.

Pelargonic acid is a saturated fatty acid consisting of 9 carbon atoms, and is known as a compound having safe and fast-acting herbicidal activity, and is a compound that was registered as a pesticide as a herbicide in 1996 in Japan. Examples of salts of pelargonic acid include sodium salts, potassium salts, calcium salts, magnesium salts, ammonium salts, ethanolamine salts, triethanolamine salts, etc. Pelargonic acid or its As the salt, sodium salt, triethanolamine salt, ammonium salt, and potassium salt are preferred. These salts may be added alone to the pest control agent, or pelargonic acid and a corresponding neutralizing agent may be added separately to form a salt during the preparation of the pest control agent. For example, pelargonic acid and triethanolamine or sodium hydroxide as a neutralizing agent can be added separately to be used as a triethanolamine salt or a sodium salt. Suitable neutralizing agents include sodium hydroxide, triethanolamine, ammonia, potassium hydroxide, and the like.

The pest control agent of the present invention contains pelargonic acid or its salt as an active ingredient in an amount of 0.01% by mass or more, preferably 0.05% by mass or more, more preferably 0.1% by mass or more of the total pest control agent. It is best to use it as appropriate. In addition, if pelargonic acid or its salt is used in too large a quantity, it may cause discomfort due to odor, which is undesirable, so it is preferably contained in a content of 10% by mass or less, more preferably 5% by mass or less, and 3% by mass or less. % or less is more preferable.
The pest control agent of the present invention can be applied to target pests as it is, but a preparation containing a predetermined active ingredient can also be diluted with water before use and then applied to target pests. In this case, it is preferable to prepare and use the active ingredient so that the content of the active ingredient in the preparation diluted with water 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 using an organic solvent or a surfactant, and dissolved, emulsified, dispersed, suspended, or solubilized to form a liquid or gel. It can also be used in microcapsule form. Since pelargonic acid is an oily liquid, it is appropriate to prepare and manufacture it using an organic solvent or a surfactant. Among these, atomizing preparations such as sprays and aerosols, and dispersing agents filled with liquid preparations in containers with a watering can head are suitable as formulation types that can make maximum use of the pest control performance of the present invention. . To prepare a spray or an aerosol, an aerosol can or a drug bottle equipped with a predetermined spray pattern and an atomizer for supplying atomized particles can be used.
The insect pest control agent of the present invention can be used not only as a liquid agent but also as a solid agent such as a powder, granules, and fine particles, as long as the effects of the present invention are achieved.
As one example of preparation and production, pelargonic acid or its salt is dissolved in an organic solvent using a surfactant if necessary to prepare a solution (liquid A), and this liquid A is mixed with an appropriate amount of water. For example, a method of stirring the pest control agent that does not require dilution during use can be mentioned. As water, one type or a mixture of two or more types of water such as tap water, ion-exchanged water, distilled water, filtered water, sterilized water, and natural water such as underground water can be used.

Examples of organic solvents that can be used include polybasic acid alcohol esters such as diisobutyl adipate, dioleyl adipate, diisodecyl adipate, diethylhexyl phthalate, didecyl phthalate, 2-ethylhexyl trimellitate, and tridecyl trimellitate; - Fatty acid alcohol esters such as cetyl ethylhexanoate, cetyl coconut fatty acid, methyl laurate, methyl myristate, methyl oleate, and octyl oleate; Polyhydric alcohol fatty acid esters such as sorbitan monolaurate and 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, Polyhydric alcohols such as xylene glycol, polyethylene glycol, 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, diethylene glycol monobenzyl ether, etc. ; Aromatic or aliphatic hydrocarbons such as α-methylbenzylphenyl)ethane; Paraffinic hydrocarbons such as normal paraffin, isoparaffin, and liquid paraffin; Esters such as ethyl acetate, butyl acetate, isopropyl myristate, and ethyl lactate; acetone, Ketones such as methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; Halogenated hydrocarbons such as chlorobenzene, dichloromethane, dichloroethane, and 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-dimethylformamide, Acid amides such as N,N-dimethylacetamide; acid alkylidenes such as propylene carbonate; vegetable oils such as soybean oil, coconut oil, rapeseed oil, tung oil, castor oil, and cottonseed oil; orange oil, hyssop oil, lemon oil, etc. One or more types of plant essential oils may be mentioned.

As surfactants that can be used, nonionic surfactants, anionic surfactants, cationic surfactants and amphoteric surfactants can be used. Specifically, for example, polyoxyethylene alkyl ether, polyoxyethylene alkylaryl ether, polyoxyethylene styrylphenyl ether, polyoxyethylene alkyl ester, polyoxyethylene sorbitan alkylate, polyoxyethylene phenyl ether polymer, polyoxyethylene Alkylene arylphenyl ether, polyoxyethylene alkylene glycol, polyoxyethylene polyoxypropylene block polymer, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkylamine, polyoxyethylene fatty acid amide, polyoxyethylene type silicone surfactant, etc. Nonionic surfactants; polyoxyethylene alkyl ether phosphate, lignin sulfonate, alkylaryl sulfonate, polyoxyethylene alkylaryl ether sulfate, alkylnaphthalene sulfonate, dialkyl sulfosuccinate, polyoxyethylene styrylphenyl Anionic surfactants such as ether sulfate, alkylbenzene sulfonate, alkyl sulfonate, alkyl sulfate, sodium salt of alkyl maleic acid cocondensate; alkyl betaine, alkylamidopropyl betaine, 2-alkyl-N-carboxymethyl Examples include one or more of amphoteric surfactants such as -N-hydroxyethylimidazolinium betaine; and cationic surfactants such as alkylamine salts and quaternary ammonium salts.

When preparing and manufacturing the pest control agent of the present invention, water, organic solvents, and surfactants can be used in appropriate combinations, but as long as the effects of the present invention are achieved, stabilizers, thickeners, fragrances, Various other components such as a dye, an antifoaming agent, a light stabilizer (ultraviolet absorber), a pH adjuster, an antifreeze agent, a preservative, a propellant, and an antioxidant can be used.
Other various ingredients include, for example, stabilizers such as butylated hydroxyanisole, dibutylated hydroxytoluene, propyl gallate, tocopherol, ascorbic acid, and vitamins; carboxyvinyl polymer, polyvinyl alcohol, guar gum, xanthan gum, polyvinylpyrrolidone, and colloidal water content. Thickeners such as aluminum silicate and colloidal hydrated magnesium silicate; ylang-ylang oil, orange oil, chamomile oil, cardamom oil, cumin oil, grapefruit oil, clove oil, shellfish oil, copaiba oil, coriander oil, perilla oil, cedarwood oil, citronella oil, cinnamon oil, jasmine oil, cedar oil, spearmint oil, sage oil, geranium oil, thyme oil, neroli oil, pine oil, minced oil, cypress oil, cypress 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, lovage oil, anisaldehyde, acetophenone, acetyl eugenol, benzyl acetate, benzyl alcohol, benzyl salicylate, benzaldehyde, carvone , cedrol, cinnamic alcohol, cinnamic aldehyde, cisjasmone, citral, citronellal, citronellol, coumarin, cinnamyl acetate, eugenol, α-pinene, β-pinene, limonene, myrcene, β-caryophyllene, geraniol, geranyl acetate, hexyl Flavors such as cinnamic aldehyde, indole, linalool, linalool oxide, linalyl acetate, methyl eugenol, menthol, nerol, phenylethyl alcohol, thymol; Red No. 2, Red No. 3, Red No. 102, Red No. 106, Red No. 227, Pigments such as Red No. 504, Blue No. 1, Blue No. 2, Blue No. 202, Yellow No. 4, Yellow No. 5, Yellow No. 202, Green No. 3, Green No. 201, Green No. 204, Orange No. 205; silicone compounds Antifoaming agents such as para-aminobenzoic acid, t-butylmethoxydibenzoylmethane, phenyl salicylate, etc.; light stabilizers (ultraviolet absorbers); gluconic acid, glucono delta lactone, potassium L-bitartrate, sodium carbonate, fumar Acid, malic acid, citric acid, sodium dihydrogen pyrophosphate, sodium L-tartrate, tripotassium phosphate, phosphoric acid, sodium lactate, adipic acid, and pH adjusters such as sodium and potassium salts and amine salts; ethanol, propylene Antifreeze agents such as glycol and ethylene glycol; Preservatives such as potassium sorbate, parachloromethylenol, butyl paraoxybenzoate, methyl paraoxybenzoate, ethyl paraoxybenzoate, propyl paraoxybenzoate, and benzoic acid; propane, propylene, Propellants such as liquefied petroleum gases such as n-butane and isobutane, liquefied gases such as dimethyl ether, chlorofluorocarbons such as CFC, HCFC, and HFC, compressed gases such as nitrogen, carbon dioxide, compressed air, and nitrous oxide; butylhydroxyanisole; , dibutylhydroxytoluene, tocopherol, γ-oryzanol, erythorbic acid, sodium erythorbate, propyl gallate, and the like.

The pest invasion inhibitor of the present invention, which has the effect of inhibiting pest invasion, suppresses absorption into the soil when applied to the burrows and surrounding areas of pests such as ants, and prevents pests such as ants from using their antennae and walking legs. In order to suppress contact with the chemically treated surface and to fully exhibit the effect of reliably inhibiting pests such as ants from entering the chemically treated surface, a viscous liquid may be used. When adjusting the viscosity, for example, glycerin, Zanflo, xanthan gum, pectin, gum arabic, guar gum, agar, cellulose and its derivatives, starch and its derivatives, carboxy alkalides, polyacrylates, polymaleates, polyvinyl alcohol, It may be adjusted using one or more thickeners such as polyvinylpyrrolidone and carboxyvinyl polymer.

For example, clay, talc, calcium carbonate, bentonite, ziecrite, sericite, acid clay, silica stone, diatomaceous earth, zeolite, kaolin, white carbon, calcium chloride, potassium chloride, ammonium sulfate, vegetable powder ( For example, it can be prepared and manufactured using one or more of monosaccharides, disaccharides, and polysaccharides such as wheat flour, soybean flour, sawdust, coconut shells, etc.), glucose, fructose, maltose, sucrose, and lactose. can.

Furthermore, if necessary, known agents such as fungicides, fungicides, insecticides, acaricides, and herbicides may be used, such as bitertanol, bromoconazole, cyproconazole, difenoconazole, hexaconazole, imazalil, myclobutanil, simeconazole, Fungicides such as tetraconazole, thiabendazole, penthiopyrad, mancozeb; fungicides such as benzethonium chloride, benzalkonium chloride, chlorhexidine hydrochloride, chlorhexidine gluconate, hinokitiol, phenoxyethanol, isopropylmethylphenol; pyrethrum extract, natural pyrethrin, prarethrin, Pyrethroids such as imiprothrin, phthalthrin, allethrin, bifenthrin, resmethrin, phenothrin, cyphenothrin, permethrin, cypermethrin, etofenprox, cyfluthrin, deltamethrin, bifenthrin, fenvalerate, fenpropathrin, empenthrin, cilafluofen, transfluthrin, metofluthrin, profluthrin carbamate compounds such as carbaryl, propoxur, methomyl, thiodicarb, oxadiazole compounds such as methoxadiazone, phenylpyrazole compounds such as fipronil, sulfonamide compounds such as amidoflumet, neonicotinoid compounds such as dinotefuran and imidacloprid. compounds, pyrrole compounds such as chlorfenapyr, insecticides such as organophosphorus compounds such as fenitrothion, diazinon, marathon, pyridafenthion, prothiophos, phoxim, chlorpyrifos, dichlorvos; alachlor, ametrine, aminocyclopyraclor, aminopyralid, amipro Phosmethyl, Anilofos, Ashram, Atrazine, Azimsulfuron, Bencarbazone, Beslozin, Benfuresate, Bensulfuron Methyl, Bensuride, Bentazone, Benthiocarb, Benzobiciclone, Benzofenap, Bialafos, Bicyclopyrone, Bifenox, Bispyribac, Bromacil, Bromobutide, Butachlor , butamifos, butenachlor, cafenstrol, carfentrazone ethyl, clomethoxynil, chloridazone, chlorphthalim, chloroIPC, TCTP, simethrin, sinosulfuron, clodinafop, clomazone, clomeprop, clopyralid, CNP, cumyluron, cyanazine, cyclosulfamuron, cyhalofop Butyl, dicamba, dichlobenil, diflufenican, dimepiperate, dimethamethrine, dimethenamide, P dimethenamide, dithiopyr, diuron, dimeron, esprocarb, etofumesate, etobenzanide, ethoxysulfuron, frazasulfuron, fenoxaprop ethyl, fenoxasulfone, fentrazamide, florasulam, fluazifop, flucarbazone sodium salt, flucetosulfuron, flupoxam, glufosinate, glyphosate ammonium salt, glyphosate isopropylamine salt, glyphosate potassium salt, glyphosate sodium salt, glyphosate trimesium salt, halosulfuron methyl, hexazinone, imazamox, imazapyr, imazetapyr, Imazaquin, imazosulfuron, indanophane, indaziflam, iodosulfuron methyl sodium salt, ioxinil, ipfencarbazone, isoproturon, isouron, isoxaben, isoxaflutole, carbutyrate, renacil, linuron, MCC, MCPA, MCPB, MCPP, mefenacet , mesosulfuron methyl, mesotrione, metamifop, metamitrone, metazosulfuron, methiozoline, methyldimeron, metolachlor, metribuzin, metsulfuron methyl, molinate, monosulfuron, monosulfuron methyl, naproanilide, napropamide, nicosulfuron, norflurazone, orthobencarb, orthosul famulon, oxadiargyl, oxadiazone, oxadiclomefon, pendimethalin, penoxsulam, pentoxazone, phenmedipham, picolinafen, pinoxaden, pretilachlor, prodiamine, promethrin, propanil, propisochlor, propoxycarbazone sodium salt, propyrisulfuron, propyzamide, Pyraclonil, pyrasulfotol, pyrazolinate, pyrazosulfuronethyl, pyrazoxifene, pyributicarb, pyrifthalide, pyriminobacmethyl, pyrimisulfan, pyroxasulfone, piroxisulam, quinclorac, quinocramine, quizalofopethyl, saflufenacil, setoxydim, siduron, Simazine, cymetrin, sulfosulfuron, tebutiuron, tefuryltrione, tembotrione, tepraloxydim, terbasil, tetrapion, tenylchlor, thiazafluron, thiencarbazone methyl, thifensulfuron methyl, topramezone, triafamone, trifloxysulfuron, trifluralin, 2 , 4-PA, d-limonene, etc., or two or more types of herbicides can be used.

Examples of pests targeted by the present invention are shown below.
Ants (black wood ant, brown carp ant, red-eared ant, black carpenter ant, brown carp ant, carpenter ant, Japanese carp ant, black grass ant, Japanese carp ant, Japanese carp ant, carpenter ant, yellow carp ant, black carp ant, black carp ant, falcon carp ant, yellow carpenter ant, black carp ant, brown carp ant, Japanese carpenter ant, wrinkle ant, black carp ant, spiny ant, red carpenter ant, samurai ant, red mountain ant, American carpenter ant, Japanese carpenter ant, Japanese carp ant, Japanese carp ant, red carpenter ant, red carpenter ant, red carpenter ant, black carpenter ant, black carpenter ant, fire ant, Argentine carpenter ant, fire ant, red carp ant, etc.),
Isopods (woodworms such as woodlice, woodlice, pillbugs such as pill bug, sea fungi such as sea fungus, etc.),
Gastropods (Slugidae, such as the African slug, Chakoura slug, and Snail slug; Ameriidae, such as the slug and Japanese slug; Sculinidae, such as the Niwakoura slug; Sculpinidae, such as the African snail; snails);
Spiders (Kabakikomachi spider, Redback spider, etc.),
Hemiptera (stinky bugs such as the green stink bug, the white-spotted stink bug, the great spiny stink bug, the brown stink bug, the German green stink bug, the brown stink bug, the southern stink bug, the red-striped stink bug, the red-striped stink bug, the red-spotted stink bug, the green peach aphid, Aphids such as apple aphid, cotton aphid, false radish aphid, etc.),
Lepidoptera (Helicoptera moths such as Chadoku moths, Helicoptera moths such as the American white flycatcher, Gypsy moths such as Gypsy moths, Noctuid moths such as Spodoptera spp., Fall armyworm, Trichoplusia sp., Heliothis sp., Helicoverpa sp. (adults or larvae of Japanese grass moths such as burrs, carp moths, etc.),
Diptera (hanger flies such as chironomids, seed flies, onion flies, leafminers such as the leafminer fly, fruit flies, fruit flies, fruit flies, black fungus flies, black flies, porphyry flies, chayote flies, and flea flies such as the giant flea fly) , butterfly flies such as the giant butterfly, blackflies, horseflies, stable flies, etc.),
Hymenoptera (southern yellow thrips, occidental thrips, red thrips, thrips, etc.),
Myriapods (chilliopods such as geji and tobisumkade, and diplopods such as yellow millipedes and red millipedes),
Acariformes (Takara mites, etc.),
Coleoptera (Coleoptera such as meal beetles, etc.),
Leatheroptera (earwigs, etc.),
Ophthalmia (such as Cockroaches),
Examples include Orthoptera (mosquitos, grasshoppers, crickets, etc.).
The pest control agent of the present invention can be effectively used against gastropods, isopods, ants, and hemiptera among these.

The pest invasion inhibitor of the present invention suppresses pests such as ants from coming into contact with chemically treated surfaces with their antennae and walking legs, and reliably prevents pests from entering chemically treated surfaces. Pelargonic acid or its salt is sprayed in an amount of preferably 0.01 to 30 g, more preferably 0.05 to 25 g per square meter of treated surface. As for the frequency of application, once the occurrence of pests such as ants is confirmed, it is recommended to apply once every 1 to 2 weeks. The means of application is not particularly limited.
The pest invasion inhibitor of the present invention can be used near entrances of buildings such as houses where pests do not want to enter, such as kitchens, back doors, entrances, hallways, living rooms, windowsills, balconies, wooden decks, ports, asphalt houses, etc. By spraying or spraying around buildings, parking lots, etc., pests such as ants are prevented from coming into contact with the chemically treated surfaces with their antennae and walking legs, and pests such as ants are prevented from coming into contact with the chemically treated surfaces. It exhibits the effect of reliably inhibiting intrusion, and is extremely practical in that it reliably inhibits the intrusion of pests such as ants into buildings such as houses and cars.

EXAMPLES The present invention will be explained in more detail with reference to Examples below, but the present invention is not limited thereto.

<Preparation of test specimen 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 using a magnetic stirrer so that the composition was 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.

<Insecticidal test 1>
Insecticidal test 1 was conducted targeting the various pests listed in Table 2. The outline of the test is shown in Figure 1. ≪Ants, isopods, slugs insecticidal test≫
Calcium carbonate was applied to the upper part of the inner wall of a plastic cup (trade name: KP-200 (manufactured by Konoike Plastics Co., Ltd.)) with 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 specimen 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 dead insects was counted after 12 hours, and the mortality rate (%) was calculated using the following formula. The test was conducted at 25° C. under bright conditions, and the average value of three tests is listed in Table 2 as the mortality rate (%).
≪Stink bug insecticidal test≫
Similar to the above-mentioned "Ants/Isopods/Slugs insecticidal test," the number of insects killed after 24 hours was calculated using 3 to 5 test insects for the German green stink bug, Japanese stink bug, southern stink bug, and white stink bug. They were counted and the mortality rate (%) was calculated using the following formula. The test was conducted once at 25° C. under bright conditions.
≪Japanese snail insecticidal test≫
Similar to the above "Ants/Isopods/Slugs Insect Killing Test", one Japanese snail was tested, mortality was confirmed after 12 hours, and the mortality rate (%) was calculated using the following formula. . The test was conducted once at 25° C. under bright conditions.
≪Tobizu Kade insecticidal test≫
Calcium carbonate was applied to the upper part of the inner wall of a plastic cup (trade name: KP-860MB (manufactured by Konoike Plastics Co., Ltd.)) with 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 specimen was treated with a sprayer from a distance of 10 cm. After the treatment, the test insects were transferred to a clean plastic cup, mortality was confirmed 24 hours later, and the mortality rate (%) was calculated using the following formula. The test was conducted once at 25° C. under bright conditions.
[Formula]: Mortality rate (%) = Number of test insects killed / Total number of test insects x 100

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

In the same manner as Example 1, the insecticidal effects against various pests were confirmed for Examples 2 to 6 listed in Table 1, and as a result, it was confirmed that the insecticidal effects were excellent as shown below.
As a result of treating Example 2 with respect to black wood ant, black stink bug, southern green stink bug, and white stink bug, the mortality rate was 93.3%, 100%, 100%, and 100%.
As a result of treating the Japanese snail beetle and the Japanese stink bug in Example 3, the mortality rate was 100% in both cases.
As a result of treating pill bugs and woodlice in Examples 3 and 4, the mortality rate was 100% in both cases.
As a result of treating pill bugs, woodlice, and slugs with Example 5, the mortality rates were 80%, 86.7%, and 100%.
As a result of treating pill bugs and slugs in Example 6, the mortality rate was 73.3% and 93%.

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

<Repellent test 1>
Repellent test 1 was conducted targeting the various pests listed in Table 4. The outline of the test is shown in Figure 2.
Calcium carbonate was applied to the upper part of the inner wall of a plastic container measuring 25 cm long, 30 cm wide, and 10 cm high to prevent pests from escaping. Inside the container, water-impregnated absorbent cotton or solid bait was placed at two locations as feeding grounds for the test insects. Next, filter paper with a diameter of 5.5 cm and 7 cm in diameter for slugs was impregnated with 2 mL each of Examples 7 to 9 and the control (100% acetone), and the filter paper was placed so as to surround the feeding area.
Next, test insects were released into the container, and the number of settled insects after 30 minutes was counted, and the repellency rate (%) was calculated using the following formula. The test was conducted at 25° C. under bright conditions, and the average value of the two tests is listed in Table 4 as the repellency rate (%).
In the test, 50 each of black wood ants and red-eared ants, 40 each of pillbugs and woodlice, and 20 slugs were used.
Repellency rate (%) = {1-(number of test specimens colonized)/(number of test specimens colonized + number of control colons)}×100
Hereinafter, the "test specimen" in the formula means a specimen of an example or a comparative example.

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

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

<Gastropod control test 1>
Gastropod control test 1 was conducted targeting Chakoura slugs. The outline of the test is shown in Figure 1.
Calcium carbonate was applied to the upper part of the inner wall of a plastic cup (trade name: KP-200 (manufactured by Konoike Plastics Co., Ltd.)) with 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 specimen 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 (FT: seconds) until they completely stopped was measured. In addition, the presence or absence of mucus shedding behavior of the Chakoura slug, the presence or absence of escape behavior, and mortality after 15 minutes and 24 hours were confirmed, and the results are listed in Table 6.
In Table 6, "No" indicates that there was no mucus shedding behavior or escape behavior, "Yes" indicates that there was mucus shedding behavior or escape behavior, "〇" indicates that death occurred, and "×" means that he was alive.

In general, it is known that even if gastropods such as slugs are treated with pyrethroid insecticides on their body surfaces, it is difficult to obtain insecticidal effects because they shed mucus on their body surfaces.
As is clear from the results of Example 10 in Table 6, the time (FT) from when pelargonic acid was treated to when the behavior completely stopped was 191 seconds (about 3 minutes), and the mucus shedding behavior and escape No movement was observed, and it was confirmed that the animal would die within 15 minutes.
On the other hand, when the animals were treated with pyrethrin, which is one of the pyrethroid insecticides in Comparative Example 2, as is known in the art, they shed mucus on the body surface and escaped, and no mortality occurred even after 24 hours.
As shown in Table 6, the insect pest control agent containing pelargonic acid as an active ingredient of the present invention has an excellent control effect against gastropods such as slugs, with reliable lethal activity that cannot be obtained with known pyrethroid insecticides. It has become clear that it is effective.

<Preparation of test specimen 4>
Test specimens having the compositions shown in Table 7 were prepared and designated as Example 11 and Comparative Examples 3 and 4. When preparing the test sample, each component was mixed and stirred using a magnetic stirrer so that the composition was uniform.

<Gastropod control test 2>
Gastropod control test 2 was conducted targeting Chakoura slugs. The outline of the test is shown in Figure 1.
The test was conducted in the same manner as the above "Gastropod control test 1". After the treatment, the test insects were observed and the time (FT: seconds) until they completely stopped was measured. In addition, the presence or absence of mucus shedding behavior, the presence or absence of escape behavior, and mortality after 15 minutes and 24 hours of the Chakoura slug were confirmed, and the results are listed in Table 8.
In Table 8, "No" indicates that there was no mucus shedding behavior or escape behavior, "Yes" indicates that there was mucus shedding behavior or escape behavior, and "Yes*" indicates that there was mucus shedding behavior but the mucus was completely removed. "〇" means that the patient was not killed, "X" means that the patient was alive.

As mentioned above, even if a pyrethroid insecticide is applied to the body surface of a gastropod such as a slug, it is difficult to obtain an insecticidal effect because the mucus on the body surface is shed, but some natural ingredients, such as L- While there are substances such as carvone that inhibit the action of shedding mucus on the body surface and cause death, it is also known that there are ingredients such as limonene that cannot inhibit the action of shedding mucus on the body surface.
As is clear from the results of Example 11 in Table 8, the time (FT) from when pelargonic acid is treated to when the behavior completely stops is 240 seconds (about 4 minutes), and the time required for pelargonic acid to completely stop its behavior is 240 seconds (approximately 4 minutes). No movement was observed and the animal died within 15 minutes.
On the other hand, when treated with L-carvone, which is known to inhibit mucus shedding behavior on the body surface and cause death, similar to pelargonic acid treatment, no escape behavior was observed and death occurred within 15 minutes, but the body surface Mucus shedding behavior was observed, and the time (FT) until the behavior completely stopped was 425 seconds (more than 7 minutes). In addition, when treated with limonene, behavior such as shedding mucus on the body surface and escape behavior were observed, and death did not occur even after 24 hours.
As shown in Table 8, it has been revealed that the pest control agent containing pelargonic acid as an active ingredient of the present invention has a better control effect than known gastropod insecticides such as L-carvone.

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

<Ant repellent test 1>
Ant repellent test 1 was conducted using the ants listed in Table 10. The outline of the test is shown in Figure 2.
Calcium carbonate was applied to the upper part of the inner wall of a plastic container measuring 25 cm long, 30 cm wide, and 10 cm high to prevent pests from escaping. Inside the container, water-impregnated absorbent cotton was placed at two locations as feeding grounds for the test insects. Next, filter paper with a diameter of 5.5 cm was impregnated with 2 mL each of Example 12 or Comparative Example 5 and the control (100% acetone), and the filter paper was placed so as to surround the feeding area.
Next, test insects (50 insects) were released into the container, and the number of insects settled on the feeding area after 30 minutes was counted, and the repellency rate (%) was calculated using the following formula.
In addition, whether or not there is an intrusion avoidance effect on the filter paper impregnated with the test specimen (an effect that encourages ants to make a U-turn in front of the filter paper without even touching the antennae or walking legs with the filter paper impregnated with the test specimen). I also confirmed that. The test was conducted at 25° C. under bright conditions, and the repellency rate (%) is shown in Table 10.
Repellency rate (%) = {1-(number of test specimens colonized)/(number of test specimens colonized + number of control colons)}×100
In Table 10, "Yes" means that an intrusion avoidance effect was observed, and "No" means that an intrusion avoidance effect was not observed.

As is clear from the results of Example 12 in Table 10, pelargonic acid had a repellency rate of 100% regardless of the type of ants, such as black wood ants and red-eared ants, and it was confirmed that it had an excellent repellent effect. On the other hand, the repellency of the pyrethroid insecticide fenpropathrin was less than 50%, and the repellent effect differed depending on the type of ant, such as the black wood ant and the red-eared ant.
Furthermore, while it was confirmed that it had an intrusion avoidance effect on filter paper impregnated with pelargonic acid, no intrusion avoidance effect was observed on filter paper impregnated with fenpropathrin.
As shown in Table 10, it is clear that the pest control agent containing pelargonic acid as an active ingredient of the present invention exhibits a superior ant repelling effect and intrusion prevention effect to chemically treated surfaces than 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 conducted.
<Preparation of test specimen 6>
Test specimens having the compositions shown in Table 11 below were prepared and designated as Example 13 and Comparative Examples 6 to 11. When preparing the test sample, each component was mixed and stirred using a magnetic stirrer so that the composition was uniform.

<Ant invasion inhibition confirmation test>
The outline of the test is shown in Figure 3.
Calcium carbonate was applied to the upper part of the inner wall of a plastic container measuring 15 cm long, 20 cm wide, and 10 cm high to prevent ants from escaping. Inside the container, absorbent cotton impregnated with water was placed at one location as a feeding ground for ants. Next, filter papers each having a diameter of 5.5 cm were impregnated with 2 mL of each test specimen, and the filter papers were placed so as to surround the feeding area.
Next, ants (black wood ants, 10 individuals) were released into the container, and the number of ants that invaded the filter paper was counted for 10 minutes as (a) the number of invasions. The test was conducted at 25° C. under bright conditions.
The number of intrusions (a) means the number of times the antennae or walking legs come into contact with the filter paper, move forward, and enter the filter paper.
Table 11 shows the composition of the above test specimens and the number of penetrations (a) for each.

As is clear from the results of Example 13 in Table 11, ants did not invade the filter paper impregnated with pelargonic acid at all, and it was confirmed that an excellent invasion inhibiting effect was exhibited. In contrast, ants appeared 49 times in 10 minutes on filter paper impregnated with butyric acid (Comparative Example 6), which is the same saturated fatty acid as pelargonic acid, and 25 times on filter paper impregnated with caprylic acid (Comparative Example 7). , capric acid, lauric acid, myristic acid, and palmitic acid (Comparative Examples 8 to 11) invaded the filter paper impregnated with each of them 13 to 15 times, and unlike pelargonic acid, they did not exhibit an invasion inhibiting effect. It also became clear.
Pelargonic acid is a saturated fatty acid that differs only in the number of carbon atoms from butyric acid, caprylic acid, capric acid, lauric acid, myristic acid, and palmitic acid, but ants never invade the chemically treated surface. It was confirmed that this fatty acid differs greatly from other fatty acids in that it exhibits an in-plane invasion inhibiting effect.
The excellent effect of pelargonic acid on inhibiting the entry of chemicals into the treated surface is a particularly remarkable effect that was first confirmed by the present inventor through numerous experiments.

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

<Detailed confirmation test for inhibiting ant invasion>
The outline of the test is shown in Figure 3.
Calcium carbonate was applied to the upper part of the inner wall of a plastic container measuring 15 cm long, 20 cm wide, and 10 cm high to prevent ants from escaping. Inside the container, absorbent cotton impregnated with water was placed at one location as a feeding ground for ants. Next, filter papers each having a diameter of 5.5 cm were impregnated with 2 mL of each test specimen, and the filter papers were placed so as to surround the feeding area.
Next, ants (10 black mountain ants) were released into the container, and the behavior of the ants that approached the filter paper was observed. The number of ants that made a U-turn without touching the filter paper with their antennae or walking legs (b) Number of invasion avoidance, the number of ants that made a U-turn without touching the filter paper with their antennae or legs, The number was counted as (c) the number of avoidance after contact for 10 minutes. Furthermore, the sum of (b) the number of times of intrusion avoidance and (c) the number of times of avoidance after contact was defined as (d) the number of times of intrusion inhibition. Furthermore, the ratio of (b) number of intrusion avoidance to (d) number of intrusion inhibition was defined as "intrusion avoidance rate (%)".
The test was conducted at 25° C. under bright conditions.
Table 12 shows the composition of the test specimens and their respective (b) number of intrusion avoidance, (c) number of avoidance after contact, (d) number of intrusion inhibition, and intrusion avoidance rate (%).

As is clear from the results of Example 14 in Table 12, the number of (d) entry inhibition of U-turn from the front of the filter paper impregnated with pelargonic acid is greater than that of butyric acid, caprylic acid, which are saturated fatty acids that differ only in the number of carbon atoms. This was approximately 1.5 to 4 times higher than that of capric acid and lauric acid (Comparative Examples 12 to 15), making it clear that pelargonic acid has an extremely excellent effect of inhibiting the penetration of chemicals into the treated surface. Among them, pelargonic acid is effective for ants to make a U-turn from in front of the chemical-treated surface without even touching the chemical-treated surface with their antennae or walking legs. (c) It was also confirmed that the number of avoidance after contact was approximately five times higher. This means that the "invasion avoidance rate (%)", which means the ratio of (b) the number of invasion avoidance to the number of (d) invasion inhibition, is This is clear from the fact that it is extremely high compared to acids (Comparative Examples 12 to 15).
In other words, it is clear that pelargonic acid has the excellent effect of inhibiting ants from coming into contact with the chemically treated surface with their antennae and walking legs, and reliably preventing ants from invading into the chemically treated surface. It became.

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

<Ant repellent test 2>
Ant repellent test 2 was conducted using the ants listed in Table 14. The outline of the test is shown in Figure 2.
Escape treatment was applied to the upper part of the inner wall of a plastic container measuring 25 cm in length, 30 cm in width, and 10 cm in height to prevent pests from escaping. Inside the container, water-impregnated absorbent cotton was placed at two locations as feeding grounds for the test insects. Next, filter paper with a diameter of 5.5 cm was impregnated with 2 mL each of Example 15 or Comparative Example 16 and the control (100% acetone), and the filter paper was placed so as to surround the feeding area. Test insects were released into the container, and the number of settled insects was counted after 30 minutes, and the repellency rate (%) was calculated using the following formula. This is taken as the "initial" repellency rate.
Next, a filter paper with a diameter of 5.5 cm was impregnated with 2 mL each of Example 15 or Comparative Example 16 and the control (100% acetone), and air-dried in a fume hood for one week. The same test as above was conducted again using filter paper that had been air-dried for one week, and the number of fixations after 12 hours was calculated as a coefficient to calculate the repellency rate (%) using the following formula. This was defined as the repellency rate "after one week". The test was conducted at 25° C. under bright conditions, and the average value of the two tests is shown in Table 14 as the repellency rate (%).
Repellency rate (%) = {1-(number of test specimens colonized)/(number of test specimens colonized + number of control colons)}×100

As is clear from the results of Example 15 in Table 14, it was confirmed that pelargonic acid had a repellency rate of 100% against black wood ants and red-eared ants both initially and after one week. On the other hand, benzyl salicylate (Comparative Example 16), which is known as a naturally derived repellent ingredient for ants, has an initial repellency rate of 100% for both black wood ants and red-eared ants, but after one week, the repellency rate is It became clear that the repellency rate was 46.2% against black wood ants and 84.8% against red-eared ants. This decrease in repellency is thought to be due to the fact that, since benzyl salicylate is a highly volatile drug, not enough benzyl salicylate remains in the filter paper air-dried for one week to have repellent activity.
These results revealed that the pest control agent containing pelargonic acid as an active ingredient of the present invention exhibits a stable ant repellent effect over a long period of time.

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

<Isopod control test 1>
Isopod control test 1 was conducted targeting the isopods listed in Table 16. The outline of the test is shown in Figure 2.
Calcium carbonate was applied to the upper part of the inner wall of a plastic container measuring 25 cm long, 30 cm wide, and 10 cm high to prevent pests from escaping. Inside the container, water-impregnated absorbent cotton was placed at two locations as feeding grounds for the test insects. Next, filter paper with a diameter of 5.5 cm was impregnated with 2 mL each of Example 16 or Comparative Example 17 and the control (100% acetone), and the filter paper was placed so as to surround the feeding area.
Next, test insects (20 insects) were released into the container, and the number of insects settled on the feeding area after 30 minutes was counted, and the repellency rate (%) was calculated using the following formula. In addition, it has an effect of avoiding intrusion on filter paper impregnated with the test specimen (effect that encourages isopods to make a U-turn in front of the filter paper without even touching their antennae or walking legs with the filter paper impregnated with the test specimen). We also confirmed the presence or absence of The test was conducted at 25° C. under bright conditions, and is listed in Table 16 as the repellency rate (%).
Repellency rate (%) = {1-(number of test specimens colonized)/(number of test specimens colonized + number of control colons)}×100
In Table 16, "Yes" means that an intrusion avoidance effect was observed, and "No" means that an intrusion avoidance effect was not observed.

As is clear from the results of Example 16 in Table 16, pelargonic acid is also used as an active ingredient in commercially available pill bug repellents against pill bugs and woodlice, and pyrethrin (comparative example 17), which is known as a pyrethroid insecticide, It was revealed that it exhibited high repellent activity compared to . Furthermore, it was confirmed that it also has the effect of preventing intrusion into filter paper impregnated with pelargonic acid.
As shown in Table 16, it has been revealed that the pest control agent containing pelargonic acid as an active ingredient of the present invention exhibits a superior effect on controlling isopods than pyrethroid insecticides.

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

<Isopod control test 2>
Isopod control test 2 was conducted targeting the isopods listed in Table 18. The outline of the test is shown in Figure 3.
Calcium carbonate was applied to the upper part of the inner wall of a plastic container measuring 15 cm long, 20 cm wide, and 10 cm high to prevent pests from escaping. Inside the container, absorbent cotton impregnated with water was placed at one location as a feeding ground for the test insects. Next, filter paper with a diameter of 5.5 cm was impregnated with 2 mL each of Example 17, Comparative Example 18, or Comparative Example 19, and the control (100% acetone), and the filter paper was placed so as to surround the feeding area.
Next, test insects (10 insects) were released into the container, and the number of times they invaded the filter paper and the number of times they inhibited their entry (the isopods did not even touch the antennae or walking legs to the filter paper impregnated with the test sample). The sum of the number of U-turns from in front of the filter paper and the number of U-turns without entering the filter paper even if the antennae or walking legs touch the filter paper is counted for 15 minutes, and the invasion inhibition is calculated using the following formula. The rate (%) was calculated. The test was conducted at 25° C. under bright conditions, and the invasion inhibition rate (%) is listed in Table 18.
Invasion inhibition rate (%) = {(Number of invasion inhibition)/(Number of invasion + Number of invasion inhibition)}×100

As is clear from the results of Example 17 in Table 18, pelargonic acid is effective against pill bugs and woodlice, such as empenthrin (Comparative Example 18) and profluthrin (Comparative Example 19), which are known to have high volatility among pyrethroid insecticides. ), it became clear that while the number of invasion inhibition was high, the number of invasions was extremely low.
Furthermore, in the test systems for empenthrin (Comparative Example 18) and profluthrin (Comparative Example 19), lethal individuals were confirmed after the test, but in the test system for pelargonic acid, no lethal individuals were confirmed. It was also confirmed that in this test system, in which pelargonic acid is not directly applied to isopods, only repellent and invasion inhibiting effects are exerted.
As shown in Table 18, it has been revealed that the pest control agent containing pelargonic acid as an active ingredient of the present invention exhibits a superior effect on controlling isopods than pyrethroid insecticides.

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

<Centipede repellent confirmation test>
The outline of the test is shown in Figure 3.
Calcium carbonate was applied to the upper part of the inner wall of a plastic container measuring 25 cm long, 30 cm wide, and 30 cm high to prevent pests from escaping. Filter paper with a diameter of 10 cm was 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. Centipede Colori (poison bait) container type) was placed on the filter paper. ) was placed.
Next, one black-spotted caddisfly that had been fasted for one day was released into the container, and mortality was confirmed 24 hours later. The test was conducted at 25° C. under bright conditions, and the repellency evaluation results are listed in Table 20.
In this confirmation test, the bait (poisonous bait) can only be ingested after entering the filter paper, so the repellency evaluation results are "x" if the black-throated crested crested crested crest is killed because there is no repellent effect, and if the crested crested crested crested crested crest is not killed, then the repellent effect is "x". It is marked as "〇" because it has a repellent effect.

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

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

<Stink bug repellent confirmation test>
The outline of the test is shown in Figure 4.
Calcium carbonate was applied to the upper part of the inner wall of a plastic cup (trade name: KP-860MB (manufactured by Konoike Plastics Co., Ltd.)) with an inner diameter of 130 mm and a height of 100 mm to prevent pests from escaping. Absorbent cotton impregnated with water was placed in two places in the cup as feeding areas for the test insects, and one feeding area was impregnated with 2 mL of the test specimen of Example 19.
Next, test insects (5 insects) listed in Table 21 were released into the cup, and the number of insects settled on the feeding area after 24 hours was counted, and the repellency rate (%) was calculated using the following formula.
Repellency rate (%) = {1-(number of test specimens colonized)/(number of test specimens colonized + number of control colons)}×100
The test was conducted at 25° C. under bright conditions, and the repellency rate (%) is shown in Table 21.

As shown in Table 21, it was revealed that pelargonic acid has good repellent activity against stink bugs regardless of their species.

The pest control agent containing pelargonic acid as an active ingredient of the present invention exhibits superior pest control effects, particularly pest repellent effects, invasion inhibiting effects, or invasion avoidance effects, compared to known agents such as pyrethroid insecticides. be. Specifically, the insect pest control agent of the present invention has excellent lethal activity against gastropods, isopods, ants, hemiptera, and myriapods; It exhibits excellent repellent and invasion inhibiting effects against species, ants, and myriapods.
The invasion inhibiting effect of the present invention is such that pests make a U-turn from in front of the chemically treated surface without touching the chemically treated surface with their antennae or walking legs, or are allowed to come in contact with the chemically treated surface containing pelargonic acid or its salt as an active ingredient. Even so, this is an excellent effect resulting from taking a U-turn action from before the drug treatment surface.
Since the pest control agent of the present invention contains pelargonic acid or its salt, which has herbicidal activity, as an active ingredient, it is possible to simultaneously obtain a herbicidal effect in the area where it is sprayed. As a result, by applying the pest control agent of the present invention near the entrance of buildings such as houses, parking lots, etc., pests that come into contact with the agent are killed, and pests do not invade into the area treated with the agent. Since it reliably inhibits the spread of pests, it prevents pests from entering the inside of houses, cars, etc., and it also has the advantage of suppressing the proliferation of weeds in the treated area.
These effects exhibited by the pest control agent of the present invention are newly discovered findings by the present inventor, and are particularly remarkable effects.

Claims (4)

A repellent for isopods characterized by containing pelargonic acid or a salt thereof as an active ingredient and exhibiting a repellent effect . An agent for controlling isopods, which contains pelargonic acid or a salt thereof as an active ingredient, and is characterized by exhibiting both a repellent effect and a lethal effect . The agent for controlling isopods according to claim 1, wherein the repellent effect is invasion avoidance and/or invasion inhibition . A method for avoiding and/or inhibiting the invasion of isopods, characterized by using pelargonic acid or a salt thereof as an active ingredient.