JP2021014413A - Pest control agent, and pest control device - Google Patents

Abstract

To provide a pest control agent and device that apply an air current to a pyrethroid compound for volatilization, wherein the pest control effect of the pyrethroid compound is improved.SOLUTION: An air current is applied to a pest control agent containing a specific pyrethroid compound and a specific dibasic acid ester for volatilization.SELECTED DRAWING: None

Description

The present invention relates to a pest control agent and a pest control device used by volatilizing an active ingredient by an air flow, and more specifically, in a pest control agent using a pyrethroid compound as an active ingredient and volatilizing the active ingredient by an air flow. The present invention relates to a pest control agent that exerts a rapid knockdown effect by combining a specific pyrethroid compound and a specific dibasic acid ester, and a device that volatilizes the pest control agent by an air flow to control the pest.

Pyrethroid compounds have been conventionally known as pest control components, and the applicant has generated an air flow with an air flow generating member such as a fan, and brought the pest control components held in the drug holder into contact with the air flow to volatilize the active component. We have also proposed a method and an apparatus for controlling pests (Patent Documents 1 and 2), and also proposed the use of a pyrethroid compound as a drug used in such a method and an apparatus (Patent Document 3). ..

Japanese Unexamined Patent Publication No. 2005-218305 Japanese Unexamined Patent Publication No. 11-187799 Japanese Unexamined Patent Publication No. 2006-257105

However, in the pest control agents and devices that volatilize the pyrethroid compounds by applying an air flow, there is still room for improvement in improving the control effect of the pyrethroid compounds by this method.

When the present inventor examined from this point of view, a pest control agent having a composition containing a specific pyrethroid compound and a dibasic acid ester having a relatively small molecular weight was volatilized by applying an air flow to knock down more quickly. We found that the effect was obtained. Further, by advancing the study on a more preferable embodiment, in the pest control agent and the device in which the pest control agent having such a composition is volatilized by applying the air flow, the amount of the air flow generated by the air flow generating member is set within a specific range. , It was found that a particularly excellent knockdown effect can be obtained.
The present invention is based on such findings, and provides the following pest control agents and pest control devices.
[1] A pest control agent used by volatilizing the active ingredient by applying an air flow.
The active ingredient contains a pyrethroid compound and a dibasic acid ester.
The pyrethroid compound has the formula:

(In the formula, R ¹ and R ² are independently hydrogen atoms, halogen atoms or alkyl groups having 1 to 4 carbon atoms. R ³ is a hydrogen atom, alkyl groups having 1 to 4 carbon atoms or carbons. It is an alkyl group having 1 to 4 carbon atoms which may be substituted with an alkoxy group having the number 1 to 4).
Is a compound represented by
The dibasic acid ester has the formula:
ROOC-X-COOR ・ ・ ・ (2)
(R is an independently linear alkyl group having 1 to 8 carbon atoms, and X is a bonded or alkylene group having 1 to 10 carbon atoms).
A pest control agent that is a dibasic acid ester indicated by.
[2] A drug holder holding the pest control agent according to [1], and
An airflow generating member that generates an airflow and applies the airflow to the drug holder to volatilize the active ingredient.
A pest control device including an intake port for accommodating the drug holder and the airflow generating member and taking in gas from the outside, and a housing having an exhaust port for discharging the airflow containing the active ingredient to the outside.
[3] The amount of airflow generated by the airflow generating member is 0.50 L / sec or more.
The pest control device according to [2].

By making the composition containing a dibasic acid ester together with a pyrethroid compound, the pest control effect can be enhanced by applying an air flow to the pest control agent to volatilize it, so that the pest control effect of the pest control agent can be enhanced.
Further, in a preferred embodiment, when the pest control agent is volatilized by applying an air flow under the conditions satisfying the above-mentioned suitable parameters, the pest control effect is further improved.

FIG. 1 is a schematic view of a drug carrier according to an embodiment of the present invention. FIG. 2 is a schematic view schematically showing a cross section of a pest control device according to an embodiment of the present invention. FIG. 3 is a schematic view schematically showing a side surface of the pest control device according to the embodiment of the present invention. FIG. 4 is a schematic view schematically showing the insect repellent test performed in the examples. FIG. 5 is a schematic view schematically showing an air volume measuring device.

As described above, in the pest control agent used by volatilizing the active ingredient by an air flow, the present invention includes a pest control agent containing a pyrethroid compound and a predetermined dibasic acid ester, and a drug holder holding the pest control agent. , An airflow generating member that generates an airflow and applies the airflow to the drug holder to volatilize the active ingredient, an intake port that houses the drug holder and the airflow generating member and takes in gas from the outside, and an active ingredient to the outside. The present invention relates to a pest control device including a housing having an exhaust port for discharging an air flow including. Hereinafter, the pest control agent and the pest control device according to the embodiment of the present invention will be described.

<Pest control agent>
The pest control agent of the present invention is used by applying an air flow to volatilize the active ingredient, and is characterized by combining a specific pyrethroid compound with a specific dibasic acid ester. Specifically, in the present invention, the pyrethroid compound has the formula:

(In the formula, R ¹ and R ² are independently hydrogen atoms, halogen atoms or alkyl groups having 1 to 4 carbon atoms. R ³ is a hydrogen atom, alkyl groups having 1 to 4 carbon atoms or carbons. It is an alkyl group having 1 to 4 carbon atoms which may be substituted with an alkoxy group having the number 1 to 4).
It is a compound represented by.

Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, an iodine atom and the like, and among them, a chlorine atom is preferable.

Examples of the alkyl group having 1 to 4 carbon atoms include a methyl group, an ethyl group, a propyl group, a butyl group and the like, and among them, a methyl group is preferable.

Examples of the alkoxy group having 1 to 4 carbon atoms include a methoxy group, an ethoxy group, a propoxy group, a butoxy group and the like, and among them, the methoxy group is preferable.

Among these, transfluthrin, metoflutrin, and profluthrin are preferable, and transfluthrin is more preferable, because the enhancing effect of the dibasic acid ester is large.

The dibasic acid ester contained in the pest control agent of the present invention has the formula:
ROOC-X-COOR ... (2)
(R is an alkyl group having 1 to 8 carbon atoms independently, and X is a bond or an alkylene group having 1 to 10 carbon atoms).

Examples of the dibasic acid ester represented by the formula (1) include dimethyl oxalate, diethyl oxalate, dipropyl oxalate, dibutyl oxalate, diamyl oxalate, dioctyl oxalate, dinonyl oxalate, didecyl oxalate, and malon. Dimethyl acid, diethyl malate, dipropyl malate, dibutyl malate, diamyl malate, dioctyl malate, dinonyl malonate, didecyl malate, dimethyl succinate, diethyl succinate, dipropyl succinate, dibutyl succinate, diamyl succinate , Dioctyl succinate, dinonyl succinate, didecyl succinate, dimethyl glutarate, diethyl glutarate, dipropyl glutarate, dibutyl glutarate, diamyl glutarate, dioctyl glutarate, dinonyl glutarate, didecyl glutarate, dimethyl adipate, adipine Dipropyl acid, dipropyl adipate, dibutyl adipate, diamyl adipate, dioctyl adipate, dinonyl adipate, didecyl adipate, dimethyl pimelic acid, diethyl pimelic acid, dipropyl pimelic acid, dibutyl pimelic acid, diactyl pimelic acid, dioctyl pimelic acid , Dinonyl pimelic acid, didecyl pimelic acid, dimethyl sperate, diethyl sperate, dipropyl sperate, dibutyl sperate, diamyl sperate, dioctyl sperate, dinonyl sperate, didecyl sperate, dimethyl azelaite, diethyl azelate, azeline Dipropyl acid, dibutyl azelate, diamyl azelate, dioctyl azelate, dinonyl azelate, didecyl azelate, dimethyl sebacate, diethyl sebacate, dipropyl sebacate, dibutyl sebacate, diamyl sebasate, dioctyl sebacate, dinonyl sebacate , Pimelic acid pimelic acid and the like.

Among these, in the above formula (2), X is a bond or an alkylene group having 1 to 8 carbon atoms in that it improves the volatilization of the pyrethroid compound of the above formula (1) and exerts a more rapid knockdown effect. Is preferable, a bond or an alkylene group having 1 to 4 carbon atoms is more preferable, and a bond is particularly preferable. Further, each of R is independently preferably a linear alkyl group having 1 to 5 carbon atoms, more preferably a linear alkyl group having 1 to 4 carbon atoms, and particularly preferably a linear alkyl group having 1 to 3 carbon atoms.
Examples of such dibasic acid esters include dimethyl oxalate, diethyl oxalate, dipropyl oxalate, dibutyl oxalate, dimethyl malonate, diethyl malate, dipropyl malate, dibutyl malate, dimethyl succinate, and succinic acid. Dipropyl, dipropyl succinate, dibutyl succinate, dimethyl glutarate, diethyl glutarate, dipropyl glutarate, dibutyl glutarate, dimethyl adipate, diethyl adipate, dipropyl adipate, dibutyl adipate, diamil adipate, dioctyl adipate, Dimethyl sevacinate, diethyl sevacinate, dipropyl sevacinate, dibutyl sevacinate, diamyl sevacinate, and dioctyl sevacinate can be mentioned, including dimethyl oxalate, diethyl oxalate, dipropyl oxalate, dibutyl oxalate, dimethyl malonate, Dipropyl malonate, dipropyl malate, dibutyl malate, dimethyl succinate, diethyl succinate, dipropyl succinate, dibutyl succinate, dimethyl glutarate, diethyl glutarate, dipropyl glutarate, dibutyl glutarate, and dipropyl adipate Preferably, dimethyl oxalate, diethyl oxalate, and dipropyl oxalate are particularly preferred.

The pest control agent of the present invention may further contain an auxiliary agent for promoting volatilization, and examples thereof include sublimable substances such as adamantane, cyclododecane, cyclodecane, norbornane, trimethylnorbonnan, naphthalene, and camphor. In addition, α- [2- (2-butoxyethoxy) ethoxy] -4,5 methylenedioxy-2-propyltoluene (piperonyl butoxide), N- (2-ethylhexyl) bicyclo [2,2,1] as synergists. Hepta-5-ene-2,3-dicarboxyimide (MGK-264), octachlorodiisopropyl ether (S-421), cinepyrin 500 and the like may be mixed.

The pest control agent of the present invention may also include an indicator for knowing the drug remaining in the drug carrier. Examples of the compound used as an indicator include a compound that changes the color of the drug carrier. Compounds that change the color of the drug carrier include, for example, allylaminoanthraquinone, 1,4-diisopropylaminoanthraquinone, 1,4-diaminoanthraquinone, 1,4-dibutylaminoanthraquinone, 1-amino-4-anilinoanthraquinone. Can contain pigments such as. The compound that changes the color of the drug carrier contains an electron-donating color-developing organic compound having a lactone ring, a color developer having a phenolic hydroxyl group, and a desensitizer if necessary, and volatilization of the drug ( It is also possible to obtain a composition that indicates the remaining amount of the drug by changing the color of the carrier accompanying the desensitizer that volatilizes at the same time.

The pest control agent of the present invention may contain an insecticide, an insect repellent or a repellent other than the pyrethroid compound and the dibasic acid ester.
Examples of the insecticide include carbamate-based insecticides such as propoxul and carbalyl; organic phosphorus-based insecticides such as fenitrothione and DDVP; oxaziazole-based insecticides such as methoxadiazone; phenylpyrazole-based insecticides such as fipronil; imidacloprid and dinotefuran. Neonicotinoid insecticides such as; sulfonamide insecticides such as amidoflumeth; pyrrole compounds such as chlorphenapir; insect immature hormone-like compounds such as metoprene and hydroprene; anti-young hormone-like compounds such as plecosene; Insecticidal hormone-like compounds; chitin synthesis inhibitors such as chlorfluazuron, diflubenzurone, hexaflumuron, buprofezin; essential oils such as phytontide, lightly loaded oil, orange oil, katsura oil, clove oil; isobornylthiocyanoacetate ( IBTA), isobornylthiocyanoethyl ether (IBTE), quaternary ammonium salts, benzyl salicylate and the like.

Insect repellents and repellents include, for example, DEET, di-n-butyl succinate, hydroxyanisole, rotenone, ethyl-butyl acetylaminopropionate, icaridin (picaridin), 3- (N-n-butyl-N-). Acetyl) Aminopropionate ethyl ester (IR3535) and the like can be mentioned.

The pest control agent of the present invention may also contain components such as a disinfectant, a deodorant, an antioxidant, an ultraviolet absorber, a fragrance, and a pH adjuster.

Examples of the disinfectant include isopropylmethylphenol, imidazole-based bactericide, paraoxybenzoic acid ester (ethyl, propyl, butyl), 3-iodo-2-propynylbutylcarbamate (IPBC), benzalkonium chloride, and benzenetonium chloride. , Chlorhexidine gluconate, chlorhexidine hydrochloride, N- (dichlorofluoromethylthio) -phthalamide, N'-(dichlorofluoromethylthio) N, N'-dimethyl-N'-phenyl-sulfamide, polyoctylpolyaminoethylglycine, thiaventazole, Examples thereof include triclosan, p-chloromethoxylenol (PCMX), Meng Soutake extract, grapefruit seed extract and the like.

Examples of deodorants include lauryl methacrylate, geranylcrotonate, catechin, 4-hydroxy-6-methyl-3- (4-methylpentanoyl) -2-pyrone, cyclodextrin, polyphenol, oxyflavan, flavonol, and myristin. Examples include acetophenone acid and dry distillate of tea.

Examples of the antioxidant include 2'-methylenebis (6-tert-butyl-4-ethylphenol) 2,6-di-tert-butyl-4-methylphenol (BHT) and 2,6-di-tert-. Butylphenol 2,2'-Methylenebis (6-tert-butyl-4-methylphenol), 4,4'-Methylenebis (2,6-di-tert-butylphenol), 4,4'-butylidenebis (6-tert-butyl) -3-Methylphenol), 4,4'-thiobis (6-tert-butyl-3-methylphenol), and dibutylhydroxynon (DBH).
Examples of the ultraviolet absorber include phenol derivatives such as BHT, bisphenol derivatives, phenyl-α-naphthylamines, arylamines such as condensates of phenetidine and acetone, and benzophenone compounds.

Fragrances are described in various literatures such as "Perfume and Flavor Materials of Natural Origin", Stephen Arctander, Allured Pub. Co. (1960), "Encyclopedia of Fragrances", edited by Japan Fragrance Association, Asakura Shoten (1989), "Flower oils and Floral Compounds In Performance", Danute Pajaujis Anonys, Allured Pub. Co. (1993), "Perfume and Flavor Chemicals (aroma chemicals)", Vols. I and II, Stephen Arctander, Allured Pub. Co. (1994), "Basic knowledge of fragrances and fragrances", edited by Motoki Nakajima, Sangyo Tosho (1995), "Synthetic fragrance chemistry and product knowledge", Motokazu Indo, The Chemical Daily (1996), "Encyclopedia of fragrances" The fragrances described in "Encyclopedia", edited by Mitsuyoshi Yatagai, and Maruzen (2005) can be used. Each is incorporated herein by reference. Specific examples of fragrances are given below, but the present invention is not limited to these.

Examples of the natural fragrance include natural essential oils such as citronella oil, orange oil, lemon oil, lavender oil, lavandine oil, bergamot oil, patchouli oil, cedarwood oil and peppermint oil.
Examples of synthetic fragrances include hydrocarbon terpenes such as α-pinene, β-pinene, p-cymen, terpinolene, γ-terpinene, α-ferandrene, milsen, camphen and osimene; heptanal, octanal, decanal, benzaldehyde and salicyl. Aldehyde, phenylacetaldehyde, citronellal, hydroxycitroneral, hydrotropic aldehyde, ligstral, citral, α-hexyl cinnamic aldehyde, α-amyl cinnamic aldehyde, lilial, cyclamen aldehyde, lylar, heliotropin, anisaldehyde, helional, vanillin , Ethylvanillin and other aldehydes; ethylformate, ethylacetate, methylpropionate, methylisobutyrate, ethylisobutyrate, ethylbutyrate, propylbutyrate, isobutylacetate, isobutylisobutyrate, isobutylbutyrate, Isobutyl isovalerate, ethyl-2-methylvalerate, isoamyl acetate, terpinyl acetate, isoamyl propionate, amyl propionate, amyl isobutyrate, amyl butyrate, amyl isovalerate, allyl hexanoate, Ethylacetacetate, ethylheptilate, heptylacetate, methylbenzoate, ethylbenzoate, ethyloctylate, styralylacetate, nonylacetate, bornylacetate, linarylacetate, ortho-ter-butylcyclohexylacetate, linaryl benzoate, benzylbenzoate , Triethylcitrate, ethyl cinnamate, methyl salicylate, hexyl salicylate, hexyl acetate, hexyl butyrate, anisyl acetate, phenylethyl isobutyrate, methyl jasmonate, ethylene brush rate, γ-undecalactone, γ-nonyl lactone , Cyclopentadecanolides, coumarin and other ester lactones; anisole, p-cresylmethyl ether, dimethylhydroquinone, methyleugenol, β-naphtholmethyl ether, β-naphthol ethyl ether, anetol, diphenyloxide, rose oxide, Ethers such as galaxolide and ambrox; isopropyl alcohol, cis-3-hexenol, heptanol, 2-octanol, dimethol, dihydromilsenol, benzylarco Alcohols such as ole, citronellol, geraniol, nerol, tetrahydrogeraniol, sedrol, santa roll, timole, anis alcohol, phenylethyl alcohol, hexanol; diacetyl, menton, isomenton, thiomentone, acetophenone, α- or β-damassone, α- or β-damasenone, α- or γ-ionone, α-, β- or γ-methylionone, methyl-β-naphthylketone, benzophenone, tentalome, acetylsedrene, α- or β-isomethylionone, α Ketones such as −, β- or γ-iron, maltor, ethyl maltor, cis-jasmon, dihydrojasmon, l-carboxylic, dihydrocarboxylic, methylamylketone, 1,8-cineole, allylamylglycolate allylcaproate And so on. These fragrances may be used alone or in any combination of two or more as a blended fragrance.

Examples of the pH adjuster include organic acids such as citric acid, succinic acid, fumaric acid, lactic acid, salicylic acid, tartaric acid, malic acid, benzoic acid, sodium citrate, sodium monohydrogen phosphate, and potassium dihydrogen phosphate. Examples include acids and their salts.

In addition to the above, the pest control agent of the present invention may contain components such as an accidental ingestion preventive agent, an antiseptic agent, and an antifoaming agent.

The pest control agent of the present invention may be prepared by mixing each of the above components without using a solvent, or may be prepared by adding to a solvent.
Examples of the solvent include water, hexane, paraffin, ethanol, propanol, decanol, glycerin, hydrocarbon, diethyl ether, isopropyl myristate, acetone, acetic acid, oleic acid, acetate ester, ethylene glycol, ethylene glycol monobutyl ether, and propylene glycol. Monobutyl ether, propylene glycol-tert-butyl ether, dipropylene glycol monobutyl ether, propylene glycol, dipropylene glycol, 2-phenoxyethanol, 3-methyl-3-methoxy-1-butanol, diethylene glycol mono2-ethylhexyl ether, diethyl phthalate, triethyl Examples thereof include citrate and linole oil, and these can be used alone or in combination of two or more.

In addition, the pest control agent of the present invention may contain a surfactant, if necessary, and is one of anionic surfactant, cationic surfactant, amphoteric surfactant, and nonionic surfactant. Alternatively, it may contain two or more types.

Examples of the nonionic surfactant include block polymers such as glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene castor oil, polyglycerin fatty acid ester, and polyoxyethylene polyoxypropylene glycol, polyoxyethylene alkyl ether, and polyethylene glycol. Examples thereof include fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and polyoxyethylene hydrogenated castor oil. Examples of the anionic surfactant include sodium α-olefin sulfonate, sodium lauryl sulfate, sodium polyoxyethylene lauryl sulfate, sodium coconut oil fatty acid methyl taurine and the like. Examples of the amphoteric tenside agent include alkyl betaine, alkylamide propyl betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine and the like. Examples of the cationic surfactant include alkylamine salts and quaternary ammonium salts.

In the pest control agent of the present invention, the mass ratio of the pyrethroid compound to the dibasic acid ester is usually 1: 0.5 to 1:20 (pyresloid compound: dibasic acid ester). From the viewpoint of improving the volatilization of the pyrethroid compound by the basic acid ester and enhancing the insecticidal efficacy, 1: 0.7 to 1:10 (pyresloid compound: dibasic acid ester) is preferable, and 1: 0.9 to 1: 1. 5 (pyresroid compound: dibasic acid ester) is more preferable, and 1: 1 to 1: 4 (pyresroid compound: dibasic acid ester) is particularly preferable.
The content of the pyrethroid compound in the pest control agent of the present invention is preferably 5% by mass to 60% by mass, more preferably 10% by mass to 55% by mass, and 20% by mass to 50% by mass. It is more preferably set to%.
The content of the dibasic acid ester in the pest control agent of the present invention is preferably 10% by mass to 70% by mass, preferably 20% by mass to 60% by mass, from the viewpoint of exerting the above effect on the pyrethroid compound. More preferably, it is more preferably 30% by mass to 55% by mass.

<Drug holder>
The drug holder and the pest control device according to the embodiment of the present invention are shown in FIGS. The drug holder 2 according to the present invention holds the above-mentioned pest control agent on the carrier 3, is attached to the pest control device 1 provided with the airflow generating member 4 described later, and applies the airflow generated by the airflow generating member 4 to the active ingredient. It is a member for volatilizing.

As the carrier 3 constituting the drug holder 2, a material having a breathable structure that does not block the flow of gas and capable of holding the pest control agent is preferable.
In this respect, the carrier preferably has a honeycomb-like, slatted-like, lattice-like, or net-like structure because it has a simple structure and high air permeability.

Examples of the material of the carrier include inorganic and organic molding materials, for example, papers (filter paper, pulp, thick paper, etc.), resins (polyethylene, polypropylene, polyvinyl chloride, highly oil-absorbent polymer, etc.), ceramics, and glass fibers. , Carbon fiber, chemical fiber (polyester, nylon, acrylic, vinylon, polyethylene, polypropylene, etc.), natural fiber (cotton, silk, wool, linen, etc.), glass fiber, carbon fiber, chemical fiber, natural fiber, etc. Examples include polypropylene, porous glass material, and wire mesh.
Further, it may be composed of an adsorptive material, and examples of the adsorptive material include gelling substances (agar, carrageenan, starch, gelatin, alginic acid, etc.) and plasticized polymer substances. When plasticizing a polymer substance, for example, dioctyl phthalate or the like is used.

When applying a pest control agent to a carrier, fatty acid esters such as isopropyl myristate, isopropyl palmitate, and hexyl laurate, isopropyl alcohol, as additives for reducing the viscosity of the pest control agent in order to facilitate impregnation, An organic solvent such as polyethylene glycol or deodorizing kerosine may be added to the pest control agent.

The amount of the pest control agent retained on the carrier is not particularly limited, but for example, when it is contained in an oil-absorbent material (for example, paper), 50 mg / g to 1000 mg / g, preferably 100 mg / g to 700 mg in the oil-absorbent material. A / g pest control agent may be retained. This amount can be determined, for example, with a volatilization amount of at least 0.1 mg / hr as a guide.

As a method of retaining the pest control agent in the carrier, in the case of a liquid form, a method of dropping, impregnating, spray coating, liquid printing, brush coating, pasting, etc. of the pest control agent can be used, and when it is not liquid. Can be used by methods such as kneading, coating, and printing. Further, when the drug is applied to the carrier as described above, in addition to the case where it is applied to the entire surface of the carrier, it can be applied partially such as punctate, single-sided or patterned. In addition, the drug may be stored in a liquid bottle and supplied to the volatilization section via a porous drug holder.

<Pest control device>
In the pest control device 1 of the present invention, the drug holder 2 holding the above-mentioned pest control agent and the drug holder 2 are blown to generate an air flow containing the active ingredient contained in the pest control agent. It includes a member 4, a housing 8 for accommodating a drug holder 2 and an airflow generating member 4. The device 1 of the present invention usually has an intake port 5, a ventilation port 6, and an exhaust port 7, and the ventilation path 6 is a flow of gas (usually air) generated by the airflow generating member 4 (in the figure, The passages and space areas (indicated by white arrows) move, the intake port 5 is an opening for taking in gas from the outside, and the exhaust port 7 discharges the gas sucked into the device 1 to the outside of the device. It is an opening to be used. The drug carrier 2 of the present invention is typically installed at at least one location in the air passage 6. The method for fixing the drug holder 2 is not particularly limited, and for example, the drug holder 2 can be fixed with a groove for fixing the holding material, a guide, a stabilizer, or a holding portion.

The airflow generating member 4 installed in the pest control device 1 is not particularly limited, but typically includes a fan-shaped airflow generating member, and the fan-shaped airflow generating member includes a centrifugal fan. It is common. The shape of the fan includes a screw shape, a propeller shape, a water wheel type, a rotary fan type, and the like. When exerting a large blowing action, a screw shape or a propeller shape is preferable, and there is an advantage that the amount of volatilization can be increased by blowing air. Further, in order to increase the amount of air in contact with the fan, an opening may be provided in each blade forming the fan.

Among various types of fans, propeller fans, sirocco fans and the like are preferably used. For example, in the case of a propeller fan, by turning on the power switch, the propeller fan is driven by the power supplied from a power source such as a battery, and the propeller fan rotates in one direction. As a result, the air outside the main body of the device is sucked in from the intake port, and the sucked air is blown out from the exhaust port through the vent in the main body of the device in which the drug holder is installed. Then, the air blown out from the exhaust port is mixed with the volatile drug held in the drug holder when passing through the drug holder, whereby the volatile drug is diffused into the drug diffusion region. To.

The position of the intake port 2 is preferably close to the airflow generating member, but it can also be adjusted depending on the relationship with the place where the drug holder is installed. It is preferable that the exhaust port is provided in the direction around the airflow generating member because the pest control agent is efficiently volatilized to the outside. The exhaust ports may be provided in at least one direction, and may be provided in two to four directions when more sufficient volatilization is required. Further, if necessary, the air flow may be controlled by providing a guide so that the air flow is discharged in only one direction, for example.

The distance between the airflow generating member 4 and the drug holder 2 should not be very close to each other, and it is preferable to provide a distance of about 5 mm or more. If the distance between the two is close, it becomes difficult to blow the wind uniformly over the entire surface of the carrier, which causes uneven volatilization. For example, when a paper honeycomb-shaped carrier (60 x 60 x 10 mm) is blown using a propeller fan (diameter 6 cm, thickness 6.2 mm), the power supply voltage for driving the fan starts from 2.0 v. When changed in the range up to 4.0v, the distance between the carrier and the fan is preferably 5 mm to 15 mm. However, these ranges are not limited, and can be appropriately selected depending on the shape of the carrier fan, the power supply voltage, the shape and size of the device, and the relationship and combination thereof.

The amount of airflow generated by the airflow generating member is not particularly limited, but in order to further improve the diffusivity of the pyrethroid compound and the dibasic acid ester, the amount of airflow generated by the airflow generating member should be 0.50 L / sec or more. It is preferably 0.65 L / sec or more, more preferably 0.70 L / sec or more.
The airflow generating member is preferably driven by a battery in that the device can be carried around, but in the case of a battery-powered pest control device, there is a problem that the usable period becomes shorter as the power consumption increases. In this respect, since the pest control agent of the present invention is excellent in volatilization property, the power consumption of the apparatus can be reduced. In order to diffuse the pyrethroid compound and the dibasic acid ester so that the pest control effect can be sufficiently exhibited while making the best use of the characteristics of the pest control agent of the present invention, the amount of airflow generated by the airflow generating member is set to 2. It is preferably 0.0 L / sec or less, and more preferably 1.7 L / sec or less. In particular, profluthrin or transfluthrin is selected as the pyrethroid compound, and as the dibasic acid ester, X is a bond or an alkylene group having 1 to 4 carbon atoms in the above formula (2), and R is independent of each other. When a dibasic acid ester which is a linear alkyl group having 1 to 4 carbon atoms is selected, a remarkable knockdown effect can be obtained by setting the amount of generated airflow to 1.5 to 1.8 L / sec. When profluthrin or transfluthrin is selected as the pyrethroid compound and dimethyl oxalate, diethyl oxalate, or dipropyl oxalate is selected as the dibasic acid ester, the amount of airflow generated is 1.4 to 1.4 to A remarkable knockdown effect can be obtained by setting the value to 1.7 L / sec.
The "air volume" is obtained by converting from the wind speed measured by the device shown in FIG. 2 (details will be described later).

<Pest control method>
According to the present invention, pest control can be performed by applying an air flow to the above-mentioned pest control agent to volatilize the active ingredient. Preferably, a drug holder holding the above-mentioned pest control agent is used. Furthermore, by using the above-mentioned pest control device, pest control can be easily performed.

The place where the pest control device is installed is not limited in any way, but it is preferably a place divided as a constant space. For example, there are houses, chests of drawers, greenhouses, poultry houses, septic tanks, etc., and the pests that inhabit them are targeted. For flies, mosquitoes, cockroaches, indoor dust mites and other invading unpleasant pests in the house, clothing pests such as squid, koiga, and cuttlefish in the tongue, and crops cultivated there in the vinyl house. Pests that affect, Ceratopogonidae, flies, mosquitoes and mites in the poultry house, and butterfly flies, mosquitoes, etc. in the septic tank are exemplified. The pest control agent of the present invention is particularly effective against, for example, biting midges, flies, mosquitoes, cockroaches, mites and the like.

Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.

[Examples 1 to 3 and Comparative Examples 1 to 4]
As shown in the table below, 375 mg of transfluthrin was dissolved in 450 mg of dimethyl oxalate, dibutyl adipate, dibutyl sebacate, and dioctyl phthalate, respectively, and the test samples of Examples 1 to 3 and Comparative Example 1 were dissolved. Was prepared, and dibutyl adipate and dibutyl sebacate were used as test samples of Comparative Examples 2 and 3, respectively, and transfluthrin was dissolved in liquid paraffin to prepare a test sample of Comparative Example 4.

[Test 1] Test on the effect of the presence or absence of dibasic acid ester or the difference in structure of dibasic acid ester on the knockdown effect The following tests were performed on the test samples of Examples 1 to 3 and Comparative Examples 1 to 4. , The insecticidal effect was evaluated.
<Test insects> 20 Drosophila <Test method>
This test was conducted in October 2018, and 20 Drosophila were released as test insects in a 14.5 liter container.
For each test sample, the chemical holding member (agent: kraft paper, structure: honeycomb structure, size: 5.5 cm) of the chemical volatilizer (trade name: Earth Nomat battery-powered 90-day instrument, see Figures 1 to 3) 825 mg was applied to the entire kraft paper (× 5.5 cm) to retain the pest control agent. After that, a chemical volatilizer was installed in the container, and a preset voltage was applied to a stabilized power supply (DCP3005, manufactured by AS ONE Corporation) to start a fan (diameter 6 cm) (air volume: 1.0 L / sec). The container was sealed and the number of knockdowns of the test insects was counted every 10 minutes. FIG. 4 schematically shows a state in which the test is being carried out.
The air volume was measured using the device shown in FIG. The air volume measuring device 10 includes a windshield 11 having a length and width of 5 cm and a length of 60 cm, and forms a closed space except for the air intake port 12 at the left end. Two wind speed measuring probes 13 (1) and 13 (2) are provided at different heights at positions 23 cm apart from the intake port 12 in the direction in which the air flow flows, thereby measuring the wind speed. The drug volatilizer used in this test was fixed to the fixing jig 14 at the right end. The device was switched on to start the motor. The wind speed was measured 5 times every 15 seconds between 2 and 3 minutes after the start-up (measured at the same timing with two probes). The average value of the measured values (N = 10) was calculated, and the calculated average value was converted into the air volume by the following formula.
Air volume (L / sec) = Wind speed (m / sec) x 100 (cm / m) x 5 (cm) x 5 (cm) ÷ 1000 (L / cm ³ )

<Test result>
The test results are shown in Table 2.

As shown in Table 2, the test samples of Examples 1 and 2 containing dimethyl oxalate and dibutyl adipate had KT50 and KT90 values, respectively, as compared with the test samples of Comparative Example 4 containing no dibasic acid ester. Both became faster. Further, in the test sample of Example 3 containing dibutyl sebacate, the KT50 value was almost the same as that of the test sample of Comparative Example 4, but the KT90 value was faster. In addition, no knockdown effect was observed in the test samples of Comparative Examples 2 and 3 having a composition obtained by removing transfluthrin from the test samples of Examples 2 and 3. As a result, it was found that the dibasic acid ester itself does not exert a knockdown effect, but the knockdown effect is enhanced by containing the dibasic acid ester of the above formula (1) together with the pyrethroid compound. It was. Further, as compared with the test sample of Comparative Example 1 containing dioctyl phthalate, the test samples of Examples 1 to 3 had higher KT50 values and KT90 values. In addition, among Examples 1 to 3, the KT50 value and the KT90 value became faster in the order of Examples 1, 2 and 3. Therefore, a difference in the knockdown effect was observed depending on the type of dibasic acid ester, and it was observed that the smaller the molecular weight of the dibasic acid ester, the greater the effect of enhancing the knockdown effect.

[Test 2] Test on the effect on the knockdown effect when the air volume is changed The air volume range suitable for the pest control agent of the present invention was examined by changing the air volume of the chemical volatilizer.
<Test sample>
As the test sample, the pest control agent of Example 2 (transfluthrin + dibutyl adipate) and the pest control agent of Comparative Example 4 (transfluthrin + liquid paraffin) were used.
<Test insects> 20 Drosophila <Drug volatilizer>
The same device as in [Test 1] was used as the drug volatilization device.

<Test method>
This test was conducted in January 2019, and the test was conducted by changing the air volume of the air flow by changing the voltage applied to the motor and changing the rotation speed of the motor using the samples of Example 2 and Comparative Example 4. Except for the above, the test was carried out in the same manner as in [Test 1].

At this time, the air volume was measured in the same manner as in [Test 1] using the apparatus shown in FIG.

<Test result>
The test results are shown in Table 4.

Comparing the test results with the air volume of 1.0 L / sec using the test sample of Comparative Example 4 and the test sample of Example 2, the test sample of Example 2 of the formulation in which the dibasic acid ester was mixed was compared. In some cases, it was demonstrated that the KT50 value was faster.
Further, when comparing the test results in which the air volume was varied from 0.67 to 1.85 L / sec using the test sample of Example 2, first, even when the air volume was 0.67 L / sec, knockdown occurred. The effect was recognized. Next, when the air volume was increased from 0.67 L / sec, the KT50 value became faster as the air volume increased, but it became the smallest at the air volume of 1.67 L / sec, and at the air volume of 1.85 L / sec, it became the smallest. The air volume was equal to or slightly slower than 1.67 L / sec. From the above, it is considered that the air volume is preferably about 0.6 to 2.0 L / sec, and more preferably about 1.0 to 1.8 L / sec in order to exert the pest control effect.

According to the present invention, the pest control effect of a pest control agent containing a pyrethroid compound is enhanced, and a useful pest control agent, a pest control device and the like can be provided.

1 Chemical volatilizer 2 Chemical carrier 3 Carrier 4 Airflow generating member 5 Intake port 6 Ventilation port 7 Exhaust port 8 Housing 9 Drosophila 10 Air volume measuring device 11 Windshield 12 Intake port 13 (1), 13 (2) Probe for wind speed measurement 14 Fixing tool

Claims (3)

It is a pest control agent that is used by volatilizing the active ingredient by applying an air flow.
The active ingredient contains a pyrethroid compound and a dibasic acid ester.
The pyrethroid compound has the formula:

(In the formula, R ¹ and R ² are independently hydrogen atoms, halogen atoms or alkyl groups having 1 to 4 carbon atoms. R ³ is a hydrogen atom, alkyl groups having 1 to 4 carbon atoms or carbons. It is an alkyl group having 1 to 4 carbon atoms which may be substituted with an alkoxy group having the number 1 to 4).
Is a compound represented by
The dibasic acid ester has the formula:
ROOC-X-COOR (2)
(In the formula, R is an independently linear alkyl group having 1 to 8 carbon atoms, and X is a bonded or alkyl group having 1 to 10 carbon atoms).
A pest control agent that is a dibasic acid ester represented by. A drug holder holding the pest control agent according to claim 1 and
An airflow generating member that generates an airflow and applies the airflow to the drug holder to volatilize the active ingredient.
A pest control device including an intake port for accommodating the drug holder and the airflow generating member and taking in gas from the outside, and a housing having an exhaust port for discharging the airflow containing the active ingredient to the outside. The amount of airflow generated by the airflow generating member is 0.50 L / sec or more.
The pest control device according to claim 2.