JP7297570B2 - Pest control agent and pest control device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pest control agent and a pest control device that use an active ingredient volatilized by an air current, and more particularly, a pest control agent that uses a pyrethroid compound as an active ingredient and uses an active ingredient that is volatilized by an air current, The present invention relates to a pest control agent that exhibits 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 airflow to control pests.

Pyrethroid-based compounds are conventionally known as pest control components. have proposed a method and device for controlling insect pests (Patent Documents 1 and 2), and also proposed the use of a pyrethroid compound as a drug used in such a method and device (Patent Document 3). .

Japanese Patent Application Laid-Open No. 2005-218305 JP-A-11-187799 JP 2006-257105 A

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

（式中、Ｒ^１及びＲ^２は、それぞれ独立して、水素原子、ハロゲン原子又は炭素数１～４のアルキル基である。Ｒ^３は、水素原子、炭素数１～４ のアルキル基又は炭素数１～４のアルコキシ基で置換されていてもよい炭素数１～４のアルキル基である。）
によって表される化合物であり、
前記二塩基酸エステルは、式：
ＲＯＯＣ－Ｘ－ＣＯＯＲ ・・・（２）
（Ｒはそれぞれ独立して炭素数１～８の直鎖のアルキル基であり、Ｘは、結合又は炭素数１から１０のアルキレン基である）
で示される二塩基酸エステルである、害虫防除剤。
［２］［１］に記載の害虫防除剤を保持した薬剤保持体と、
気流を発生させて、前記気流を前記薬剤保持体に当てて有効成分を揮散させる気流発生部材と、
前記薬剤保持体及び前記気流発生部材を収納し、外部から気体を取り込む吸気口、及び外部へ前記有効成分を含む気流を放出する排気口を有する筐体と
を備える、害虫防除装置。
［３］ 前記気流発生部材によって発生する気流の量は、０．５０Ｌ／秒以上である、
［２］に記載の害虫防除装置。 As a result of investigation from such a viewpoint, the present inventors found that when an insect control agent having a composition containing a dibasic acid ester with a relatively small molecular weight together with a specific pyrethroid compound is volatilized by applying an air flow, more rapid knockdown It was found that the effect can be obtained. In addition, further investigations have been carried out on a more preferable embodiment, and in the pest control agent and device for volatilizing the pest control agent having such a composition by applying airflow, the amount of airflow generated by the airflow generating member is set to a specific range. , a particularly excellent knockdown effect can be obtained.
The present invention is based on such findings, and provides the following pest control agent and pest control device.
[1] A pest control agent used by volatilizing an active ingredient by applying an air current,
The active ingredient comprises a pyrethroid compound and a dibasic acid ester,
The pyrethroid compound has the formula:

(wherein R ¹ and R ² are each independently a hydrogen atom, a halogen atom or an alkyl group having 1 to 4 carbon atoms; R ³ is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a carbon It is an alkyl group having 1 to 4 carbon atoms which may be substituted with an alkoxy group having 1 to 4 carbon atoms.)
is a compound represented by
The dibasic acid ester has the formula:
ROOC-X-COOR (2)
(R is each independently a linear alkyl group having 1 to 8 carbon atoms, and X is a bond or an alkylene group having 1 to 10 carbon atoms)
A pest control agent which is a dibasic acid ester represented by
[2] A drug carrier holding the pest control agent according to [1];
an airflow generating member that generates an airflow and applies the airflow to the drug support to volatilize the active ingredient;
A pest control device, comprising: a housing containing the medicine holder and the airflow generating member, and having an intake port for taking in gas from the outside and 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 forming a composition containing a pyrethroid compound and a dibasic acid ester, the pest control agent can be volatilized by applying an air stream to increase the pest control effect, so that the pest control effect of the pest control agent can be enhanced.
Further, in a preferred embodiment, if the pest control agent is volatilized by applying an air stream under the conditions that satisfy the above-mentioned preferred parameters, the pest control effect is further improved.

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

As described above, the present invention provides a pest control agent that is used by volatilizing an active ingredient by airflow, including a pest control agent containing a pyrethroid compound and a predetermined dibasic acid ester, and a drug carrier 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 generation member, and takes in gas from the outside, and an active ingredient to the outside. and a housing having an exhaust port that emits an airflow containing Hereinafter, pest control agents and pest control devices according to embodiments of the present invention will be described.

（式中、Ｒ^１及びＲ^２は、それぞれ独立して、水素原子、ハロゲン原子又は炭素数１～４のアルキル基である。Ｒ^３は、水素原子、炭素数１～４ のアルキル基又は炭素数１～４のアルコキシ基で置換されていてもよい炭素数１～４のアルキル基である。）
によって表される化合物である。 <Pest control agent>
The pest control agent of the present invention is used by applying an air stream to volatilize the active ingredient, and is characterized by combining a specific pyrethroid compound and a specific dibasic acid ester. Specifically, in the present invention, the pyrethroid compound has the formula:

(wherein R ¹ and R ² are each independently a hydrogen atom, a halogen atom or an alkyl group having 1 to 4 carbon atoms; R ³ is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a carbon It is an alkyl group having 1 to 4 carbon atoms which may be substituted with an alkoxy group having 1 to 4 carbon atoms.)
is a compound represented by

Examples of the halogen atom include fluorine atom, chlorine atom, bromine atom, iodine atom, etc. Among them, chlorine atom is preferred.

The alkyl group having 1 to 4 carbon atoms includes, for example, methyl group, ethyl group, propyl group, butyl group, etc. Among them, methyl group is preferred.

Examples of the alkoxy group having 1 to 4 carbon atoms include methoxy group, ethoxy group, propoxy group, butoxy group and the like, among which methoxy group is preferred.

Among these, transfluthrin, metofluthrin, and profluthrin are preferable, and transfluthrin is more preferable, because the dibasic acid ester has a large enhancing effect.

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

Dibasic acid esters represented by formula (1) include, for example, dimethyl oxalate, diethyl oxalate, dipropyl oxalate, dibutyl oxalate, diamyl oxalate, dioctyl oxalate, dinonyl oxalate, didecyl oxalate, malon Dimethyl acid, diethyl malonate, dipropyl malonate, dibutyl malonate, diamyl malonate, dioctyl malonate, dinonyl malonate, didecyl malonate, 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 diethyl acid, dipropyl adipate, dibutyl adipate, diamyl adipate, dioctyl adipate, dinonyl adipate, didecyl adipate, dimethyl pimelate, diethyl pimelate, dipropyl pimelate, dibutyl pimelate, diamyl pimelate, dioctyl pimelate , Dinonyl Pimelate, Didecyl Pimelate, Dimethyl Sperate, Diethyl Sperate, Dipropyl Sperate, Dibutyl Sperate, Diamyl Sperate, Dioctyl Sperate, Dinonyl Sperate, Didecyl Sperate, Dimethyl Azelate, Diethyl Azelate, Azelaine Dipropyl acid, dibutyl azelate, diamyl azelate, dioctyl azelate, dinonyl azelate, didecyl azelate, dimethyl sebacate, diethyl sebacate, dipropyl sebacate, dibutyl sebacate, diamyl sebacate, dioctyl sebacate, dinonyl sebacate , didecyl sebacate and the like.

Among these, in terms of improving the volatilization of the pyrethroid compound of the above formula (1) and exhibiting a more rapid knockdown effect, in the above formula (2), X is a bond or an alkylene group having 1 to 8 carbon atoms is preferred, a bond or an alkylene group having 1 to 4 carbon atoms is more preferred, and a bond is particularly preferred. Each R is independently preferably a straight-chain alkyl group having 1 to 5 carbon atoms, more preferably a straight-chain alkyl group having 1 to 4 carbon atoms, and particularly preferably a straight-chain 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 malonate, dipropyl malonate, dibutyl malonate, dimethyl succinate, and succinic acid. diethyl, dipropyl succinate, dibutyl succinate, dimethyl glutarate, diethyl glutarate, dipropyl glutarate, dibutyl glutarate, dimethyl adipate, diethyl adipate, dipropyl adipate, dibutyl adipate, diamyl adipate, dioctyl adipate, Dimethyl sebacate, diethyl sebacate, dipropyl sebacate, dibutyl sebacate, diamyl sebacate and dioctyl sebacate can be mentioned, dimethyl oxalate, diethyl oxalate, dipropyl oxalate, dibutyl oxalate, dimethyl malonate, diethyl malonate, dipropyl malonate, dibutyl malonate, dimethyl succinate, diethyl succinate, dipropyl succinate, dibutyl succinate, dimethyl glutarate, diethyl glutarate, dipropyl glutarate, dibutyl glutarate, and dipropyl adipate, more Dimethyl oxalate, diethyl oxalate and dipropyl oxalate are particularly preferred.

The pest control agent of the present invention may further contain a volatilization promoting aid, and examples thereof include sublimable substances such as adamantane, cyclododecane, cyclodecane, norbornane, trimethylnorbonnane, naphthalene and camphor. α-[2-(2-butoxyethoxy)ethoxy]-4,5 methylenedioxy-2-propyltoluene (piperonyl butoxide) and N-(2-ethylhexyl)bicyclo[2,2,1] as synergists. Hept-5-ene-2,3-dicarboximide (MGK-264), octachlorodiisopropyl ether (S-421), synepyrine 500, etc. may be mixed.

The pest control agent of the present invention may also contain an indicator for knowing the amount of drug remaining in the drug carrier. Compounds used as indicators include, for example, compounds that change the color of the drug-supported material. Compounds that change the color of the drug support include, for example, allylaminoanthraquinone, 1,4-diisopropylaminoanthraquinone, 1,4-diaminoanthraquinone, 1,4-dibutylaminoanthraquinone, and 1-amino-4-anilinoanthraquinone. It can contain dyes such as In addition, the compound that changes the color of the drug support includes an electron-donating color-forming organic compound having a lactone ring, a color developer having a phenolic hydroxyl group, and, if necessary, a desensitizer, and volatilization of the drug ( It is also possible to make a composition that indicates the remaining amount of the agent by changing the color of the carrier accompanying the desensitizing agent that volatilizes along with it.

The pest control agent of the present invention may contain insecticides, repellents or repellents other than the pyrethroid compound and the dibasic acid ester.
Examples of insecticides include carbamate insecticides such as propoxur and carbaryl; organophosphorus insecticides such as fenitrothion and DDVP; oxadiazole insecticides such as methoxadiazone; phenylpyrazole insecticides such as fipronil; Neonicotinoid insecticides such as; sulfonamide insecticides such as amidoflumet; pyrrole compounds such as chlorfenapyr; insect juvenile hormone-like compounds such as methoprene and hydroprene; molting hormone-like compounds; chlorfluazuron, diflubenzuron, hexaflumuron, buprofezin and other chitin synthesis inhibitors; phytoncide, peppermint oil, orange oil, cinnamon oil, clove oil and other essential oils; isobornylthiocyanoacetate ( IBTA), isobornylthiocyanoethyl ether (IBTE), quaternary ammonium salts, benzyl salicylate, and the like.

Insect repellents and repellents include DEET, di-n-butylsuccinate, hydroxyanisole, rotenone, ethyl-butylacetylaminopropionate, icaridin (picaridin), 3-(Nn-butyl-N- Acetyl)aminopropionic acid ethyl ester (IR3535) and the like.

The pest control agent of the present invention may also contain components such as disinfectants, deodorants, antioxidants, ultraviolet absorbers, fragrances, and pH adjusters.

Examples of disinfectants include isopropylmethylphenol, imidazole fungicides, paraoxybenzoic acid esters (ethyl, propyl, butyl), 3-iodo-2-propynylbutylcarbamate (IPBC), benzalkonium chloride, and benzethonium chloride. , chlorhexidine gluconate, chlorhexidine hydrochloride, N-(dichlorofluoromethylthio)-phthalamide, N'-(dichlorofluoromethylthio) N,N'-dimethyl-N'-phenyl-sulfamide, polyoctylpolyaminoethylglycine, thiabentazole, triclosan, p-chlorometaxylenol (PCMX), moso bamboo extract, grapefruit seed extract and the like.

Deodorants include, for example, lauryl methacrylate, geranyl crotonate, catechin, 4-hydroxy-6-methyl-3-(4-methylpentanoyl)-2-pyrone, cyclodextrin, polyphenol, oxyflavan, flavonol, myristin. acid acetophenone, dry distillation of tea and the like.

Examples of antioxidants include 2′-methylenebis(6-tert-butyl-4-ethylphenol), 2,6-di-tert-butyl-4-methylphenol (BHT), 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), dibutylhydroxynon (DBH).
Examples of ultraviolet absorbers include phenol derivatives such as BHT, bisphenol derivatives, phenyl-α-naphthylamine, arylamines such as condensates of phenetidine and acetone, and benzophenone compounds.

Perfumes are described in various literature, eg, "Perfume and Flavor Materials of Natural Origin", Steffen Arctander, Allured Pub. Co. (1960), "Encyclopedia of Aroma", edited by Japan Perfume Association, Asakura Shoten (1989), "Flower oils and Floral Compounds In Perfumery", Danute Pajaujis Anonis, Allured Pub. Co. (1993), "Perfume and Flavor Chemicals (aroma chemicals)", Vols. I and II, Steffen Arctander, Allured Pub. Co. (1994), "Fundamental Knowledge of Perfume and Perfume", Mototaka Nakashima, Sangyo Tosho (1995), "Synthetic Perfume Chemistry and Product Knowledge", Genichi Indo, Kagaku Kogyo Nippousha (1996), "Encyclopedia of Aroma" Encyclopedia", edited by Mitsukatsu Yatagai, Maruzen (2005) can be used. each incorporated herein by reference. Specific representative examples of perfumes are listed below, but the present invention is not limited to these.

Examples of natural fragrances include natural essential oils such as citronella oil, orange oil, lemon oil, lavender oil, lavandin oil, bergamot oil, patchouli oil, cedarwood oil, and peppermint oil.
Examples of synthetic fragrances include hydrocarbon terpenes such as α-pinene, β-pinene, p-cymene, terpinolene, γ-terpinene, α-phellandrene, myrcene, camphene, and ocimene; heptanal, octanal, decanal, benzaldehyde, salicyl Aldehyde, phenylacetaldehyde, citronellal, hydroxycitronellal, hydrotropic aldehyde, ligustral, citral, α-hexyl cinnamic aldehyde, α-amyl cinnamic aldehyde, lyrial, cyclamenaldehyde, lyral, heliotropine, anisaldehyde, helional, vanillin , aldehydes such as ethyl vanillin; ethyl formate, ethyl acetate, methyl propionate, methyl isobutyrate, ethyl isobutyrate, ethyl butyrate, propyl butyrate, isobutyl acetate, isobutyl isobutyrate, isobutyl butyrate, isobutyl isovalerate, ethyl-2-methylvalerate, isoamyl acetate, terpinyl acetate, isoamyl propionate, amyl propionate, amyl isobutyrate, amyl butyrate, amyl isovalerate, allyl hexanoate, Ethyl acetoacetate, ethyl heptylate, heptyl acetate, methyl benzoate, ethyl benzoate, ethyl octylate, styraryl acetate, nonyl acetate, bornyl acetate, linalyl acetate, ortho-tert-butyl cyclohexyl acetate, linalyl benzoate, benzyl benzoate , triethyl citrate, ethyl cinnamate, methyl salicylate, hexyl salicylate, hexyl acetate, hexyl butyrate, anisyl acetate, phenylethyl isobutyrate, methyl jasmonate, ethylene brassylate, γ-undecalactone, γ-nonyl lactone , cyclopentadecanolide, esters and lactones such as coumarin; Ethers such as galaxolide and ambrox; isopropyl alcohol, cis-3-hexenol, heptanol, 2-octanol, dimetol, dihydromyrcenol, benzyl alcohol, citronellol, geraniol, nerol, tetrahydrogeraniol, cedrol, santalol, thymol , anise alcohol, phenylethyl alcohol, hexanol and other alcohols; diacetyl, menthone, isomenthone, thiomenthone, acetophenone, α- or β-damascone, α- or β-damascenone, α- or γ-ionone, α-, β- or γ-methylionone, methyl-β-naphthyl ketone, benzophenone, tentalome, acetylcedrene, α- or β-isomethylionone, α-, β- or γ-ylone, maltol, ethyl maltol, cis-jasmone, dihydro Jasmon, l-carvone, dihydrocarvone, ketones such as methyl amyl ketone, 1,8-cineole, allyl amyl glycolate allyl caproate and the like. These perfumes may be used singly or in any combination of two or more to be used as a blended perfume.

Examples of pH adjusters 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; acids, salts thereof, and the like.

In addition to the above, the pest control agent of the present invention may contain, for example, ingredients such as an accidental ingestion prevention agent, an antiseptic, 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 them to a solvent.
Examples of solvents include water, hexane, paraffin, ethanol, propanol, decanol, glycerin, hydrocarbons, diethyl ether, isopropyl myristate, acetone, acetic acid, oleic acid, acetic acid esters, ethylene glycol, ethylene glycol monobutyl ether, 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 mono-2-ethylhexyl ether, diethyl phthalate, triethyl Citrate, linoleic oil and the like can be mentioned, and these can be used singly or in combination of two or more.

In addition, the pest control agent of the present invention may contain a surfactant if necessary, and one of anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants. Or it may contain 2 or more types.

Examples of nonionic surfactants include block polymers such as glycerin fatty acid esters, sorbitan fatty acid esters, polyoxyethylene castor oil, polyglycerin fatty acid esters, polyoxyethylene polyoxypropylene glycol, polyoxyethylene alkyl ethers, and polyethylene glycols. Fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene hydrogenated castor oil and the like. Examples of anionic surfactants include sodium α-olefin sulfonate, sodium lauryl sulfate, sodium polyoxyethylene lauryl sulfate, and sodium methyltaurate of coconut oil fatty acid. Examples of amphoteric surfactants include alkylbetaine, alkylamidopropylbetaine, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, and the like. Examples of cationic surfactants include alkylamine salts and quaternary ammonium salts.

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

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

As the carrier 3 constituting the drug carrier 2, it is preferable to use a material that has an air-permeable structure that does not block the flow of gas and that can hold the pest control agent.
In this regard, since the carrier has a simple structure and high air permeability, it is preferable to use a carrier having a structure such as honeycomb, grid, lattice, or net.

Examples of the carrier material include inorganic and organic molding materials, such as papers (filter paper, pulp, cardboard, etc.), resins (polyethylene, polypropylene, polyvinyl chloride, highly oil-absorbing polymers, 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 non-woven fabrics, porous glass materials, wire meshes, and the like.
In addition, 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 plasticizing macromolecular substances. Dioctyl phthalate, for example, is used for plasticizing polymeric substances.

When the pest control agent is applied to the carrier, in order to facilitate impregnation, additives that reduce the viscosity of the pest control agent include fatty acid esters such as isopropyl myristate, isopropyl palmitate, and hexyl laurate, isopropyl alcohol, Organic solvents such as polyethylene glycol and deodorized kerosene may be added to the pest control agent.

The amount of the pest control agent to be held in the carrier is not particularly limited. /g of pest control agent. This amount can be determined, for example, based on the volatilization amount of at least 0.1 mg/hr.

As a method for holding the pest control agent on the carrier, in the case of a liquid form, methods such as dripping, impregnation, spray coating, liquid printing, brush coating, pasting, etc. can be used. can use methods such as kneading, coating, and printing. When the drug is applied to the carrier as described above, it can be applied not only to the entire surface of the carrier, but also to a portion of the carrier such as dots, one side, or a pattern. Alternatively, the drug may be stored in a liquid bottle and supplied to the volatilization part through a porous drug holder.

<Pest control device>
The pest control device 1 of the present invention includes a drug holder 2 holding the pest control agent described above, and an air flow generated by applying an air flow to the drug holder 2 to generate an air flow containing the active ingredient contained in the pest control agent. It is provided with a member 4 and a housing 8 that houses the drug holder 2 and the airflow generating member 4 . The device 1 of the present invention usually has an intake port 5, an air passage 6, and an exhaust port 7, and the air passage 6 is a flow of gas (usually air) generated by the airflow generating member 4 (in the figure, (indicated by a white arrow) is a passageway or space through which air is moved, 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 that opens. The drug holder 2 of the present invention is typically installed in at least one or more locations of the air passage 6 . The method for fixing the drug holder 2 is not particularly limited, and for example, it can be fixed with a groove for fixing the holding material, a guide, a stabilizer, or a holding part.

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 is a centrifugal fan. Common. The shape of the fan includes a screw shape, a propeller shape, a water wheel shape, a rotary fan shape, and the like. A screw shape or a propeller shape is preferable when a large air blowing action is to be exhibited, and there is an advantage that the volatilization amount can be increased by air blowing. Also, openings may be provided in each blade forming the fan to increase the amount of air contacting 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, when a power switch is turned on, the propeller fan is driven by 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 through the intake port, and the sucked air is passed through the vent port in which the drug holder is installed inside the main body of the device and is blown out through the exhaust port. The air blown out from the exhaust port is mixed with the volatile chemical retained in the chemical retainer when passing through the chemical retainer, thereby diffusing the volatile chemical in the chemical diffusion region. be.

The position of the intake port 2 is preferably near the airflow generating member, but can be adjusted according to the relationship with the place where the drug holder is installed. It is preferable that the exhaust port is provided in the peripheral direction of the airflow generating member in terms of efficiently volatilizing the pest control agent to the outside. The exhaust port may be provided in at least one direction, and may be provided in two to four directions when more sufficient volatilization is required. Also, if necessary, a guide may be provided to control the airflow so that the air is discharged only in one direction, for example.

The distance between the airflow generating member 4 and the drug holder 2 should not be too close, and it is preferable to provide a distance of about 5 mm or more. If the distance between the two is too close, it becomes difficult to apply air uniformly to the entire surface of the carrier, which causes uneven volatilization. For example, when a paper honeycomb carrier (60 x 60 x 10 mm) is blown using a propeller fan (6 cm in diameter and 6.2 mm in thickness), the power supply voltage for driving the fan is set from 2.0 V to When the voltage is varied up to 4.0v, the distance between the carrier and the fan is preferably 5mm to 15mm. 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.

Although the amount of airflow generated by the airflow generating member is not particularly limited, in order to further improve the diffusibility 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. , more preferably 0.65 L/sec or more, and even more preferably 0.70 L/sec or more.
It is preferable that the airflow generating member is driven by a battery because the device can be carried around. In this regard, since the pest control agent of the present invention is excellent in volatility, it is possible to reduce the power consumption of the device. In order to diffuse the pyrethroid compound and the dibasic acid ester so as to fully exhibit the pest control effect while taking advantage of the characteristics of the pest control agent of the present invention, the amount of airflow generated by the airflow generating member is reduced to 2. 0 L/sec or less, and more preferably 1.7 L/sec or less. In particular, as the pyrethroid compound, profluthrin or transfluthrin is selected, and as the dibasic acid ester, in the above formula (2), X is a bond or an alkylene group having 1 to 4 carbon atoms, and each R is independently When a dibasic acid ester, which is a linear alkyl group having 1 to 4 carbon atoms, is selected, a significant 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 generated airflow is 1.4 to A remarkable knockdown effect can be obtained at 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 current to the pest control agent described above to volatilize the active ingredient. Preferably, a drug carrier holding the pest control agent described above is used. Furthermore, pests can be easily controlled by using the pest control device described above.

The place where the pest control device is installed is not subject to any restrictions, but it is preferably a place divided as a fixed space. For example, there are houses, closets, vinyl houses, poultry houses, septic tanks, etc., and insect pests living there are targeted. In the house, flies, mosquitoes, cockroaches, indoor dust mites, and other unpleasant pests that invade.In the closet, clothing pests such as burrs, koiga, and deer beetles.In greenhouses, the crops cultivated there. Examples of pests to be affected include biting midges, flies, mosquitoes and mites in poultry houses, and moth flies and mosquitoes in septic tanks. The pest control agent of the present invention is particularly effective against biting midges, flies, mosquitoes, cockroaches, mites and the like, for example.

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these.

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

[Test 1] Test on the influence of the presence or absence of a dibasic acid ester or the difference in the structure of the dibasic acid ester on the knockdown effect The test specimens of Examples 1 to 3 and Comparative Examples 1 to 4 were subjected to the following tests. , to evaluate the insecticidal effect.
<Test insect> 20 Drosophila <Test method>
This test was conducted in October 2018, and 20 Drosophila were released as test insects into a 14.5-liter container.
Each test sample was used as a drug holding member (material: kraft paper, structure: honeycomb structure, size: 5.5 cm) of a drug volatilization device (trade name: Earth Nomat battery-powered 90-day device, see FIGS. 1 to 3). 825 mg was applied to the entire kraft paper of x5.5 cm) to retain the pest control agent. After that, the chemical volatilization device was installed in the container, and a preset voltage was applied to a stabilized power supply (DCP3005, manufactured by AS ONE) to start a fan (6 cm in diameter) (air volume: 1.0 L/sec). The container was sealed and the number of test insect knockdowns was counted every 10 minutes. FIG. 4 schematically shows the state in which the test is being performed.
Moreover, the air volume was measured using the apparatus shown in FIG. The air volume measuring device 10 has a windshield 11 with a length of 5 cm and a length of 60 cm. Two wind speed measuring probes 13(1) and 13(2) are provided at different heights at a position 23 cm away from the air inlet 12 in the airflow direction to measure the wind speed. The chemical volatilization device used in this test was fixed to the fixing jig 14 on the right end. The device was switched on to start the motor. The wind speed was measured 5 times every 15 seconds for 2 to 3 minutes after start-up (measured with two probes at the same timing). An average value of the measured values (N=10) was calculated, and the calculated average value was converted into an air volume using 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 results>
Table 2 shows the test results.

As shown in Table 2, the KT50 and KT90 values of the test specimens of Examples 1 and 2 containing dimethyl oxalate and dibutyl adipate, respectively, compared to the test specimen of Comparative Example 4, which did not contain the dibasic acid ester, increased. everything is faster. Also, 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. Further, no knockdown effect was observed in the test specimens of Comparative Examples 2 and 3, which had the composition of Examples 2 and 3 except transfluthrin. As a result, although the dibasic acid ester itself does not exhibit a knockdown effect, it is found that the knockdown effect is increased by including the dibasic acid ester of the above formula (1) together with the pyrethroid compound. rice field. Also, compared with the test sample of Comparative Example 1 containing dioctyl phthalate, the test samples of Examples 1 to 3 had earlier KT50 and KT90 values. Further, among Examples 1 to 3, the KT50 value and the KT90 value were 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 a tendency 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 effect on knockdown effect when air volume is varied The air volume of the chemical volatilization device was varied to examine the range of air volume suitable for the pest control agent of the present invention.
<Test sample>
As test specimens, 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 volatilization device>
The same device as in [Test 1] was used as the chemical volatilization device.

<Test method>
This test was conducted in January 2019, using the samples of Example 2 and Comparative Example 4, by varying the voltage applied to the motor and varying the number of rotations of the motor, the airflow volume was changed and tested. Except for this, the test was conducted in the same manner as [Test 1].

この際、風量は、図５に示す装置を用い、［試験１］と同様にして測定した。

At this time, the air volume was measured using the apparatus shown in FIG. 5 in the same manner as in [Test 1].

<Test results>
Table 4 shows the test results.

Using the test sample of Comparative Example 4 and the test sample of Example 2, when comparing the test results with an air volume of 1.0 L / sec for both, it was found that the test sample of Example 2, which was formulated with a dibasic acid ester mixed, It was demonstrated that KT50 values were faster when
In addition, when comparing the test results in which the air volume was varied from 0.67 to 1.85 L / sec using the test specimen of Example 2, first, even when the air volume was 0.67 L / sec, knockdown Effectiveness was observed. Next, when the air volume is increased from 0.67 L / sec, the KT50 value becomes faster as the air volume increases, but it becomes the smallest at the air volume of 1.67 L / sec, and at the air volume of 1.85 L / sec, 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, more preferably about 1.0 to 1.8 L/sec, in order to exhibit the pest control effect.

ADVANTAGE OF THE INVENTION According to this invention, the insect-controlling effect of the insect-controlling agent containing a pyrethroid compound is enhanced, and a beneficial insect-controlling agent, insect-controlling device, etc. can be provided.

Reference Signs List 1 chemical volatilization device 2 chemical support 3 carrier 4 airflow generating member 5 intake port 6 ventilation path 7 exhaust port 8 housing 9 fruit fly 10 air volume measuring device 11 windshield 12 intake ports 13 (1), 13 (2) wind velocity measuring probe 14 fixing jig

Claims (5)

A pest control agent that is used by volatilizing an active ingredient by applying an air current,
The active ingredient comprises a pyrethroid compound and a dibasic acid ester,
The pyrethroid compound has the formula:

(wherein R ¹ and R ² are each independently a hydrogen atom, a halogen atom or an alkyl group having 1 to 4 carbon atoms; R ³ is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a carbon It is an alkyl group having 1 to 4 carbon atoms which may be substituted with an alkoxy group having 1 to 4 carbon atoms.)
is a compound represented by
The dibasic acid ester has the formula:
ROOC-X-COOR (2)
(Wherein, each R is independently a linear alkyl group having 1 to 8 carbon atoms, and X is a bond or an alkylene group having 1 to 10 carbon atoms)
A pest control agent which is a dibasic acid ester represented by The pest control according to claim 1, wherein in formula (2), each R is independently a linear alkyl group having 1 to 5 carbon atoms, and X is a bond or an alkylene group having 1 to 8 carbon atoms. agent. 3. The pest control agent according to claim 1 or 2, wherein the pyrethroid compound is transfluthrin, metofluthrin, or profluthrin. a drug carrier holding the pest control agent according to any one of claims 1 to 3 ;
an airflow generating member that generates an airflow and applies the airflow to the drug support to volatilize the active ingredient;
A pest control device, comprising: a housing containing the drug holder and the airflow generating member, and having an intake port for taking in gas from the outside and 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.
A pest control device according to claim 4 .

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