Quantitative-dose spray type aerosol for pest control and method for pest control using the same

Abstract

To provide a quantitative spray type aerosol for pest control that provides rapid control effects against mosquitoes and other pests that lurk in relatively low positions on indoor floors or walls, especially in gaps such as behind furniture. [Solution] A quantitative spray type aerosol for pest control comprising an aerosol concentrate containing an insecticide component and a solvent, and an aerosol composition comprising a propellant, wherein the volume ratio of the aerosol concentrate to the propellant in the aerosol composition is 5:95 to 50:50, and the content of the insecticide component in the aerosol concentrate is 3 to 70 mass / volume%, wherein the spray force decay rate represented by formula (I) defined in the specification is 10 to 50%, or the spray volume of the aerosol concentrate is L (mL) and the nozzle area is S (mm 2 A quantitative spray type aerosol for pest control, where S / L is 5-40 when )

Description

[Technical Field]

[0001] The present invention relates to a quantitative spray type aerosol for pest control and a method for pest control using the same. [Background technology]

[0002] Conventionally, for quantitative spray aerosols used indoors to control flying insects such as mosquitoes, a control method has been considered in which the insecticide is applied in advance to indoor walls, floors, ceilings, etc., and then exterminated when mosquitoes or other insects that enter the building come into contact with the insecticide when they land on these surfaces (Patent Document 1). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2015-180196 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] Observations by the inventors revealed that in typical living spaces, mosquitoes tend to rest at lower positions on the floor and walls rather than at higher positions on the ceiling and walls. Furthermore, while mosquitoes are known to rest in poorly ventilated areas such as behind furniture, it has become clear that they particularly tend to rest at or near the floor in such locations. In other words, effectively distributing aerosol particles to relatively low positions and areas that are difficult for insecticides to reach is more important for mosquito control in actual usage environments.

[0005] Furthermore, in modern living environments with increased airtightness and a rise in high-rise buildings, opportunities for mosquitoes to enter indoors have decreased. In such environments, rather than aiming for long-lasting control, it is more important, from the user's perspective, to quickly deliver insecticide particles to mosquitoes that are resting in relatively low positions or in places that are difficult for insecticides to reach, thereby controlling them.

[0006] Therefore, the challenge for quantitative spray type aerosols for pest control is to quickly achieve control effects against pests such as mosquitoes that are resting in relatively low positions on indoor floors or walls, especially in gaps such as behind furniture. [Means for solving the problem]

[0007] As a result of diligent research, the inventors have found that the above problem can be solved by adjusting the attenuation of the spray force with distance in a quantitative spray type aerosol for pest control to an appropriate value. Furthermore, they have found that the above problem can also be solved by adjusting the ratio of the spray volume of the aerosol concentrate to the nozzle area to an appropriate value in a quantitative spray type aerosol for pest control.

[0008] In other words, the present invention is characterized by the following [1] to [9]. [1] The product includes an aerosol concentrate containing pest control ingredients and a solvent, and an aerosol composition containing a propellant. In the aerosol composition, the volume ratio of the aerosol concentrate to the propellant is 5:95 to 50:50. The amount of the insecticide component in the aerosol concentrate is 3 to 70% by mass / volume. The injection force attenuation rate, expressed by the following equation (I), is 10-50%. A quantitative spray type aerosol for pest control. Jet force attenuation rate (%) = (1 - (jet force at 25°C and 40cm (mN) / jet force at 25°C and 20cm (mN))) × 100 ... Equation (I) [2] The product includes an aerosol concentrate containing pest control ingredients and a solvent, and an aerosol composition containing a propellant. In the aerosol composition, the volume ratio of the aerosol concentrate to the propellant is 5:95 to 50:50. The amount of the insecticide component in the aerosol concentrate is 3 to 70% by mass / volume. When the injection amount of the aerosol stock solution is L (mL) and the nozzle area is S (mm 2 ), a metered injection type aerosol for pest control, where S / L is 5 - 40. [3] The metered injection type aerosol for pest control according to [1] or [2] above, wherein the pest control component contains a room temperature volatile pyrethroid compound, and the content of the room temperature volatile pyrethroid compound in the aerosol stock solution is 7.5 - 25 mass / volume%. [4] The metered injection type aerosol for pest control according to [1] or [2] above, wherein the solvent is a lower alcohol. [5] [[ID=第十四条]]The metered injection type aerosol for pest control according to [1] or [2] above, wherein the injection amount L of the aerosol stock solution per injection operation is 0.02 mL - 0.15 mL. [6] The nozzle area S is 0.2 mm 2 ~3 mm 2 The metered injection type aerosol for pest control according to [1] or [2] above. [7] A pest control method using a metered injection type aerosol for pest control that injects an aerosol composition, wherein the pest control method includes a step of injecting the aerosol composition horizontally, the aerosol composition includes an aerosol stock solution containing a pest control component and a solvent, as well as an injection agent, in the aerosol composition, the volume ratio of the aerosol stock solution to the injection agent is 5:95 - 50:50 for the aerosol stock solution and the injection agent, [[ID=3第14条]]in the aerosol stock solution, the content of the pest control component is 3 - 70 mass / volume%, A pest control method, wherein the attenuation rate of the injection force represented by the following formula (I) by the metered injection type aerosol for pest control is 10 - 50%. Injection force attenuation rate (%) = (1 - (injection force (mN) at 25°C, 40 cm / injection force (mN) at 25°C, 20 cm)) × 100 ··· Formula (I) [8] A method of pest control using a quantitative spray type aerosol for pest control that sprays an aerosol composition, The aforementioned pest control method includes the step of spraying the aerosol composition horizontally, The aerosol composition comprises an aerosol concentrate containing an insecticide component and a solvent, and a propellant. In the aerosol composition, the volume ratio of the aerosol concentrate to the propellant is 5:95 to 50:50. The amount of the insecticide component in the aerosol concentrate is 3 to 70% by mass / volume. The spray volume of the aerosol concentrate is L (mL), and the nozzle area is S (mm²). 2 A pest control method in which, given the conditions, the S / L ratio is 5-40. [9] The pest control method according to [7] or [8] above, wherein the step of spraying the aerosol composition horizontally is the step of spraying the aerosol composition in a direction including a downward direction and an upward direction at an angle of 0° to 15° with respect to the horizontal direction of the floor surface. [Effects of the Invention]

[0009] The quantitative spray type aerosol for pest control of the present invention can quickly deliver spray particles to desired treatment locations, particularly behind furniture, at relatively low positions on indoor floors or walls. Furthermore, by using the quantitative spray type aerosol for pest control of the present invention, the amount of pest control component adhering to ceilings and walls, which is not necessarily required, can be reduced. This reduces the risk of contact between the user and the pest control component, and also suppresses the overuse of the pest control component. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a floor plan illustrating the laboratory used in the pest control efficacy measurement test. [Figure 2] Figure 2 is a perspective view illustrating the laboratory used in the pest control efficacy measurement test. [Modes for carrying out the invention]

[0011] The present invention will be described in detail below, but these are merely examples of preferred embodiments and are not limiting to these. The "~" in a numerical range indicates a range that includes the numbers before and after it. For example, "0 mass%~100 mass%" means a range that is greater than or equal to 0 mass% and less than or equal to 100 mass%. In this specification, "mass" is synonymous with "weight."

[0012] The present invention provides a quantitative spray type aerosol for pest control, comprising an aerosol concentrate containing pest control components and a solvent, and an aerosol composition containing a propellant. The components are described below.

[0013] (Aerosol concentrate) The aerosol concentrate contains pest control ingredients.

[0014] Pest control components are substances that can kill, repel, or knock down target pests. The type of pest control component is not particularly limited, and known compounds can be used.

[0015] As a pest control component, a room-temperature volatile pyrethroid compound is preferred from the viewpoint of pest control effectiveness. In the quantitative spray type pest control aerosol of the present invention, when the aerosol concentrate contains a room-temperature volatile pyrethroid compound, the aerosol concentrate, after being sprayed as spray particles from the quantitative spray type pest control aerosol, comes into contact with flying pests and exerts a control effect, then quickly falls and adheres to low positions on floors and walls. This controls pests that are anchored to low positions on floors and walls. Subsequently, the room-temperature volatile pyrethroid compound is re-volatilized from the spray particles that have adhered to low positions on floors and walls, exerting a control effect on other pests, such as flying pests. The room-temperature volatile pyrethroid compounds that re-volatilize from low positions on floors and walls reach gaps that conventional quantitative spray aerosols for pest control could not adequately reach, such as behind furniture, and exert a control effect on pests that are resting or flying in those locations.

[0016] The room temperature volatile pyrethroid compound is a pyrethroid compound, and from the viewpoint of having a good balance between the control effect and the duration of the effect, the vapor pressure at 25°C is preferably 1.33×10 -3 Pa to 1.07×10 -2 Pa (1×10 -5 mmHg to 8×10 -5 mmHg), more preferably 2.67×10 -3 Pa to 1.07×10 -2 Pa (2×10 -5 mmHg to 8×10 -5 mmHg).

[0017] It is preferable to use a compound represented by the following general formula (1) for the above-mentioned room temperature volatile pyrethroid compound because of its excellent volatility and pest control effect.

[0018]

Chemical formula

[0019] In the above formula, 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 an alkyl group having 1 to 4 carbon atoms which may be substituted with a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.

[0020] Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, an iodine atom and the like. Among these, a chlorine atom is preferable.

[0021] 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. Among these, a methyl group is preferable.

[0022] Examples of alkoxy groups having 1 to 4 carbon atoms include methoxy, ethoxy, propoxy, and butoxy groups. Among these, the methoxy group is preferred.

[0023] The vapor pressure at 25°C is 1.33 × 10⁻⁶. -3 Pa~1.07×10 -2 Pa(1 × 10) -5 mmHg ~ 8 × 10 -5 Examples of pyrethroid compounds with a molecular weight of mmHg include profluthrin, transfluthrin, metofluthrin, empenthrin, and mepafluthrin. Among these, profluthrin, transfluthrin, and metofluthrin represented by the above general formula (1) are preferred from the viewpoint of volatility and pest control effect, and transfluthrin and metofluthrin are more preferred. These may be used individually or in combination of two or more.

[0024] Other pest control ingredients include, for example, non-volatile pyrethroid compounds such as permethrin, pyrethrin, allethrin, phthalthrin, resmethrin, flamethrin, phenothrin, prallethrin, cyphenothrin, cypermethrin, and imiprothrin; organophosphorus compounds such as fenitrothion, dichlorvos, chlorpyrifosmethyl, diazinon, and fenthion; carbamate compounds such as carbaryl and propoxur; compounds such as methoprene, pyriproxyfen, methoxadiazone, fipronil, amidoflumeth, and brofranilide; peppermint oil, orange oil, fennel oil, cinnamon oil, clove oil, Examples include various essential oil components such as turpentine oil, eucalyptus oil, cypress oil, jasmine oil, neroli oil, peppermint oil, bergamot oil, butigrain oil, lemon oil, lemongrass oil, cinnamon oil, citronella oil, geranium oil, citral, l-menthol, citronellyl acetate, cinnamic aldehyde, terpineol, nonyl alcohol, cis-jasmone, limonene, linalool, 1,8-cineole, geraniol, α-pinene, p-menthane-3,8-diol, eugenol, menthyl acetate, thymol, benzyl benzoate, and benzyl salicylate; and dibasic acid esters such as dibutyl adipate. These may be used individually or in combination of two or more.

[0025] The pest control component may include a pyrethroid compound that is volatile at room temperature and a non-volatile pest control component that has a lower vapor pressure than the pyrethroid compound that is volatile at room temperature. In this case, the non-volatile pest control component, which has a lower vapor pressure than the pyrethroid compound that is volatile at room temperature, will be effective against tethered pests for a long period of time. When the aerosol concentrate of the quantitative spray type pest control aerosol of the present invention contains such a combination of pest control components, it can achieve particularly excellent control effects not only against mosquitoes but also against crawling insects. Examples of non-volatile insecticides with lower vapor pressure than pyrethroid compounds that volatilize at room temperature include permethrin, phenothrin, cyphenothrin, and brofuranilide, among the other insecticides mentioned above.

[0026] The pest control component may include a pyrethroid compound that is volatile at room temperature and a volatile control component that has a higher vapor pressure than the pyrethroid compound. In this case, the volatile control component with a higher vapor pressure than the pyrethroid compound volatilizes faster than the pyrethroid compound, thus providing a faster pest control effect. This allows users to experience the effectiveness of pest control and quickly obtain a repellent effect throughout the entire indoor space. Examples of volatile pest control components with a higher vapor pressure than pyrethroid compounds that volatilize at room temperature include, among the other pest control components mentioned above, peppermint oil, orange oil, and l-menthol.

[0027] In the quantitative spray type aerosol for pest control of the present invention, it is preferable to include at least a portion of a room-temperature volatile pyrethroid compound as a pest control component, as this provides an excellent balance between control effect and duration of effect, particularly against mosquitoes. The content of the room-temperature volatile pyrethroid compound relative to the total mass of the pest control component is preferably 50 to 100% by mass, more preferably 75 to 100% by mass, and even more preferably 90 to 100% by mass.

[0028] The pest control ingredients should be selected appropriately according to the type of target pest. Target pests include, for example, mosquitoes such as Asian tiger mosquito, common house mosquito, tropical house mosquito, etc., flies such as house flies, flesh flies, black flies, etc., small flies such as yellow fruit flies, phorid flies, fungus gnats, drain flies, etc., flying insects such as horseflies, black flies, midges, bees, moths, etc., and cockroaches such as German cockroaches, American cockroaches, etc. Examples include mites such as lice, bed bugs, house dust mites, flour mites, predatory mites, and house dust mites; ants such as black garden ants, reticulated ants, house ants, red imported fire ants, and red imported fire ants; creeping insects such as spiders, stink bugs, pill bugs, centipedes, millipedes, and termites; and clothing pests such as clothes moths, carpet beetles, and varied carpet beetles.

[0029] The quantitative spray type aerosol for pest control of the present invention exhibits excellent control effects against flying insects. Among flying insects, mosquitoes and gnats, which have the habit of staying or walking on low positions on walls or floors, are preferred, with mosquitoes being more preferred.

[0030] For flying insects such as mosquitoes, flies, fruit flies, horseflies, black flies, midges, bees, and moths, it is preferable to include a pyrethroid compound that volatilizes at room temperature, as re-volatilization can provide control effects even to flying insects during flight. Transfluthrin and metofluthrin are suitable for mosquitoes. For crawling insects such as cockroaches, bed bugs, mites, ants, spiders, stink bugs, pillbugs, centipedes, millipedes, and termites, phthalthrin, prallethrin, imiprothrin, permethrin, and phenothrin are suitable.

[0031] The content of the pest control component is preferably 3% by mass / volume or more in the aerosol concentrate, more preferably 5% by mass / volume or more, even more preferably 7.5% by mass / volume or more, and particularly preferably 10% by mass / volume or more. Furthermore, it is preferably 70% by mass / volume or less in the aerosol concentrate, more preferably 65% ​​by mass / volume or less, even more preferably 50% by mass / volume or less, and particularly preferably 25% by mass / volume or less. A pest control component content of 3% by mass / volume or more in the concentrate provides superior pest control effectiveness, while a content of 70% by mass / volume or less improves productivity. Furthermore, from the viewpoint of pest control effectiveness, the content of pest control components (preferably pyrethroid compounds that volatilize at room temperature) in the aerosol concentrate is preferably 3 to 70% by mass / volume, more preferably 5 to 65% by mass / volume, even more preferably 7.5 to 50% by mass / volume, and particularly preferably 10 to 25% by mass / volume. In addition, in order to make the control effect of the quantitative spray type insecticide aerosol of the present invention more balanced and superior, it is also preferable to set the content of the insecticide component in the aerosol concentrate to the range of 3-70% by mass / volume, 3-65% by mass / volume, 3-50% by mass / volume, 3-25% by mass / volume, 5-70% by mass / volume, 5-65% by mass / volume, 5-50% by mass / volume, 5-25% by mass / volume, 7.5-70% by mass / volume, 7.5-65% by mass / volume, 7.5-50% by mass / volume, 7.5-25% by mass / volume, 10.0-70% by mass / volume, 10-65% by mass / volume, 10-50% by mass / volume, or 10-25% by mass / volume.

[0032] In this specification, the content of pest control components in the aerosol concentrate, particularly the content of room-temperature volatile pyrethroid compounds, is given at 25°C and 1 atm.

[0033] Aerosol concentrates contain solvents for purposes such as adjusting the viscosity of the concentrate, improving production suitability, and increasing the penetration of pest control components into pests. Examples of such solvents include the glycol ethers mentioned above, hydrocarbon solvents, alcohol solvents, aromatic solvents, and ester solvents. Water and surfactants can also be used.

[0034] Examples of hydrocarbon solvents include aliphatic hydrocarbons such as paraffinic hydrocarbons and naphthenic hydrocarbons, as well as alicyclic hydrocarbons, with kerosene such as JIS No. 1 kerosene being preferred. Specifically, examples include normal paraffins and isoparaffins. Typical normal paraffins have 8 to 16 carbon atoms, such as Neothiosol manufactured by Chuo Kasei Co., Ltd. and Normal Paraffin MA manufactured by ENEOS Corporation. Typical isoparaffins have 8 to 16 carbon atoms, such as IP Clean LX and Supersol FP25 manufactured by Idemitsu Kosan Co., Ltd. Examples of alcohol-based solvents include lower alcohols such as ethanol and propanol (n and iso), and polyhydric alcohols such as glycerin and ethylene glycol. Examples of aromatic solvents include toluene and xylene. Examples of ester-based solvents include isopropyl myristate, hexyl laurate, and isopropyl palmitate. As a solvent, alcohol-based solvents are preferred because they have excellent solubility for pest control components and are effective in promoting the re-volatilization of pest control components from fallen or adhering particles. Ethanol, n-propanol, and isopropanol are particularly preferred.

[0035] The solvent content is preferably 30% by mass / volume or more in the aerosol concentrate, more preferably 40% by mass / volume or more, and even more preferably 50% by mass / volume or more. Furthermore, it is preferably 99% by mass / volume or less in the aerosol concentrate, more preferably 95% by mass / volume or less, and even more preferably 90% by mass / volume or less. Having 30% by mass / volume or more of solvent in the aerosol concentrate can improve production suitability, and having 99% by mass / volume or less is preferable because it allows the pest control components to work more effectively. Furthermore, from the viewpoint of pest control, the solvent content is preferably 30-99% by mass / volume in the aerosol concentrate, more preferably 40-95% by mass / volume, and even more preferably 50-90% by mass / volume.

[0036] Other components may be included in the aerosol concentrate, as long as they do not impair the effects of the present invention. Examples of other components include fragrance components, deodorizing components, disinfectant / sterilizing components, preservatives, pH adjusters, UV absorbers, inorganic substances, surfactants, and solubilizers.

[0037] Aromatic components are those that emit fragrance. Examples of aromatic components include, in addition to the essential oil components mentioned above, natural fragrances such as anise oil, lavender oil, rose oil, rosemary oil, and grapefruit oil; and synthetic fragrances such as camphene, p-cymene, citronellol, nerol, benzyl alcohol, n-butyraldehyde, isobutyraldehyde, coumarin, and cineole. These may be used individually or in combination of two or more.

[0038] Deodorizing components are ingredients that can eliminate odors. Examples of deodorizing components include ingredients that adsorb odor components such as green tea extract, persimmon tannin, methacrylate lauryl acid, methyl benzoate, methyl phenylacetate, geranyl chloride, acetophenone myristate, benzyl acetate, benzyl propionate, and silver, as well as ingredients that mask odor components, such as the fragrance components mentioned above. These may be used individually or in combination of two or more.

[0039] Disinfectant and sterilizing ingredients are components that remove or kill microorganisms, molds, and bacteria. Examples of disinfectant and sterilizing ingredients include ethanol, hinokitiol, 2-mercaptobenzothiazole, 2-(4-thiazolyl)benzimidazole, 5-chloro-2-methyl-4-isothiazolin-3-one, triforine, p-chlorometaxylenol, 3-methyl-4-isopropylphenol, ortho-phenylphenol, chlorhexidine gluconate, polylysine, chitosan, tetrahydrolinalool, and dialkyldimethylammonium chloride. These may be used individually or in combination of two or more.

[0040] The content of the aerosol concentrate in the aerosol composition can be appropriately changed depending on the intended use of the quantitative spray type pest control aerosol and the combination with the propellant, and is not particularly limited, but for example, it can be 5 to 50% by volume in the aerosol composition. If the aerosol concentrate in the aerosol composition is 5% by volume or more, more spray particles can reach lower positions on floors and walls, and a higher effect of the pest control component can be obtained. If it is 50% by volume or less, more spray particles can reach deep into gaps, while contamination of furniture, floors, walls, etc. by the aerosol concentrate can be reduced. The lower limit of the aerosol concentrate content in the aerosol composition is more preferably 10% by volume or more, even more preferably 15% by volume or more, and the upper limit is more preferably 40% by volume or less, and even more preferably 30% by volume or less. In this specification, the volume ratios of each component in the aerosol composition refer to the volume ratios of each component in the aerosol composition present as a liquid in the aerosol container of the quantitative spray type pest control aerosol of the present invention.

[0041] The specific gravity of the aerosol concentrate at 20°C is preferably 0.65 or higher, more preferably 0.7 or higher, and even more preferably 0.75 or higher. It is also preferably 1.1 or lower, more preferably 0.95 or lower, and even more preferably 0.9 or lower. A specific gravity of 0.65 or higher at 20°C of the aerosol concentrate suppresses the effects of airflow due to ventilation, etc., resulting in excellent stability of the pest control effect. A specific gravity of 1.1 or lower allows more spray particles to reach deep into corners and crevices indoors, resulting in better control of pests present in such places. The specific gravity of the aerosol concentrate at 20°C is preferably 0.65 to 1.1, more preferably 0.7 to 0.95, and even more preferably 0.75 to 0.9.

[0042] (propellant) The propellant is a medium for spraying the aerosol concentrate and is pressurized and filled into the aerosol container together with the aerosol concentrate. In this specification, the aerosol container is preferably a pressure-resistant container. The material of the aerosol container is not particularly limited as long as it is a commonly used material, and examples include metal containers such as aluminum, steel, and tinplate, PET containers, and glass containers. The inner surface of a metal container may be coated with epoxy resin, phenolic resin, polyamide-imide resin, etc.

[0043] As propellants, one or more types of liquefied petroleum gases (LPG) such as propane, propylene, n-butane, and isobutane, liquefied gases such as dimethyl ether (DME), compressed gases such as carbon dioxide, nitrogen gas, and compressed air, and halogenated carbon gases such as HFC-152a, HFC-134a, HFO-1234yf, and HFO-1234ze can be used. The propellant used should be appropriately selected in accordance with its compatibility with the aerosol concentrate and the container components such as the aerosol valve.

[0044] The amount of propellant in the aerosol composition can be appropriately changed depending on the intended use of the quantitative spray type aerosol for pest control and the combination with the aerosol concentrate, and is not particularly limited, but for example it can be 50 to 95% by volume in the aerosol composition. If the amount of propellant in the aerosol composition is 50% by volume or more, more spray particles can reach deep into gaps. Also, if the amount of propellant is 95% by volume or less, more spray particles can reach lower positions on floors and walls, resulting in a better control effect against pests present in such places. The lower limit of the propellant content in the aerosol composition is more preferably 60% by volume or more, even more preferably 70% by volume or more, and the upper limit is more preferably 90% by volume or less, and even more preferably 85% by volume or less.

[0045] The volume ratio of aerosol concentrate to propellant in the aerosol composition (aerosol concentrate:propellant) is preferably 5:95 to 50:50, more preferably 10:90 to 40:60, and even more preferably 15:85 to 30:70. By using such a volume ratio, sufficient pest control effect can be obtained.

[0046] The internal pressure of the metered-dose aerosol of the present invention at 25°C is preferably 0.3 MPa or higher, more preferably 0.35 MPa or higher, and even more preferably 0.4 MPa or higher. Furthermore, it is preferably 0.6 MPa or lower, more preferably 0.55 MPa or lower, and even more preferably 0.5 MPa or lower. An internal pressure of 0.3 MPa or higher at 25°C makes it easier to maintain an appropriate rate of attenuation of the spray force of the sprayed aerosol, while an internal pressure of 0.6 MPa or lower ensures that the spray particles are of an appropriate size, allowing more of the spray particles to reach deep into gaps. The internal pressure of the metered-dose aerosol of the present invention at 25°C is preferably 0.3 to 0.6 MPa, more preferably 0.35 to 0.55 MPa, and even more preferably 0.4 to 0.5 MPa. The internal pressure can be measured using a general pressure measuring device; for example, a flash diaphragm type small pressure sensor (e.g., manufactured by Kyowa Denki Co., Ltd., model number: PGM-E) can be used. To adjust the internal pressure within this range, when using liquefied petroleum gas (LPG) as a propellant, it is possible to use LPG with a vapor pressure of 0.29 to 0.5 MPa at 25°C.

[0047] (Quantitative spray type aerosol for pest control) The quantitative spray type aerosol for pest control of the present invention is configured such that an aerosol composition containing the above-mentioned aerosol concentrate and propellant is filled into an aerosol container, and the opening of the aerosol container is closed by an aerosol valve.

[0048] A metered-dose aerosol is an aerosol that sprays a fixed amount of aerosol composition with a single spray operation. In a metered-dose aerosol, when the user operates the spraying element (hereinafter also called the spray button) attached to the aerosol valve, a fixed amount of the aerosol composition (concentrate and propellant) in the aerosol container is sprayed through the aerosol valve, and the concentrate is atomized by the propellant and sprayed as spray particles.

[0049] (Aerosol valve) The aerosol valve comprises an opening / closing member for switching communication between the inside and outside of the aerosol container and the outside when operated by the user, a housing to which the opening / closing member is attached, and a mounting member for holding the housing in a predetermined position on the aerosol container. The opening / closing member also includes a stem that slides up and down in conjunction with the spray member. The sliding of the stem switches between communication (spray state) and blockage (non-spray state) of the aerosol composition. The aerosol valve has a housing hole for taking in the aerosol composition from the aerosol container and a stem hole for sending the taken-in aerosol composition to the spray member. The housing has a housing hole for taking in the aerosol composition from the aerosol container. The stem has a stem hole for sending the aerosol composition taken into the housing to the spray member. The path from the housing hole to the stem hole constitutes an internal passage through which the aerosol composition passes.

[0050] In the present invention, the aerosol valve is a quantitative aerosol valve, i.e., a quantitative spray valve, which dispenses a fixed amount by operating the spraying member once. Preferably, the amount dispensed by the aerosol valve is a predetermined fixed amount in the range of 0.1 to 3 mL per spray operation. By using an aerosol valve having a housing that can store an aerosol composition in the range of 0.1 to 3 mL per spray operation, a predetermined fixed amount in the range of 0.1 to 3 mL can be dispensed with a single spray operation, enabling the spraying of a predetermined amount of pest control component. The amount dispensed by the aerosol valve can be appropriately set within the above range. Preferably, the amount dispensed per spray is 0.1 mL or more, more preferably 0.2 mL or more, even more preferably 0.3 mL or more, and particularly preferably 0.4 mL or more. Also, preferably 3 mL or less, preferably 1.5 mL or less, more preferably 1 mL or less, even more preferably 0.8 mL or less, and particularly preferably 0.7 mL or less. A spray volume of 0.1 mL or more from the aerosol valve makes it easier to secure sufficient spray particles to adhere to low positions on floors and walls, resulting in superior pest control effectiveness against insects present in such locations. A spray volume of 3 mL or less minimizes indoor contamination from spraying the aerosol concentrate and reduces contact between the user and the pest control components. The spray volume of the aerosol valve is preferably 0.1 to 3 mL, more preferably 0.1 to 1.5 mL, even more preferably 0.2 to 1.0 mL, particularly preferably 0.3 to 0.8 mL, and most preferably 0.4 to 0.7 mL. Furthermore, in order to achieve a better balance between suppressing indoor contamination by spraying the aerosol concentrate, suppressing contact with the pest control component by the user, and the pest control effect in various parts of the living space, it is also preferable that the spray volume of the aerosol valve in the present invention be 0.1-3 mL, 0.1-1.5 mL, 0.1-1 mL, 0.1-0.8 mL, 0.1-0.7 mL, 0.2-3 mL, 0.2-1.5 mL, 0.2-1 mL, 0.2-0.8 mL, 0.2-0.7 mL, 0.3-3 mL, 0.3-1.5 mL, 0.3-1 mL, 0.3-0.8 mL, 0.3-0.7 mL, 0.4-3.0 mL, 0.4-1.5 mL, 0.4-1 mL, 0.4-0.8 mL, or 0.4-0.7 mL.

[0051] Furthermore, the amount of aerosol concentrate sprayed L per spray operation is preferably 0.02 mL to 0.15 mL, more preferably 0.03 mL to 0.1 mL, and even more preferably 0.06 mL to 0.08 mL, in order to achieve an appropriate spray force attenuation rate.

[0052] (Injection component) The spraying component (spray button) is a component attached to the aerosol container via an aerosol valve. The spray button has an internal passage for the aerosol composition taken in from the aerosol container through the stem hole of the aerosol valve, and a nozzle through which the aerosol composition is sprayed.

[0053] The inner diameter (nozzle hole diameter) of the nozzle of the spray button is preferably φ0.45 mm or larger, more preferably φ0.5 mm or larger, and even more preferably φ0.6 mm or larger. Furthermore, it is preferably φ3 mm or smaller, more preferably φ2 mm or smaller, and even more preferably φ1.6 mm or smaller. A nozzle hole diameter of φ0.45 mm or larger enhances the diffusion of spray particles, and a diameter of φ3 mm or smaller suppresses excessive particle size growth while also suppressing dripping from the nozzle. It is also acceptable to have multiple nozzles with the same nozzle hole diameter.

[0054] The nozzle area S is set to 0.2 mm in order to achieve an appropriate injection force attenuation rate. 2 The above is preferable, 0.5 mm 2 The above is more preferable. Also, 3mm 2 The following is preferable: 2 mm 2 The following is more preferable: The nozzle area S is preferably 0.2 mm 2 ~3mm 2 And more preferably 0.5 mm 2 ~2mm 2 When a single metered-dose spray aerosol for pest control has multiple nozzles, the nozzle area S is the total area of ​​all the nozzles provided by that single metered-dose spray aerosol for pest control.

[0055] (Attenuation rate of jet force) In the quantitative spray type aerosol for pest control of the present invention, the spray force decay rate represented by the following formula (I) is preferably 10 to 50%, more preferably 15 to 40%. Jet force attenuation rate (%) = (1 - (jet force at 25°C and 40cm (mN) / jet force at 25°C and 20cm (mN))) × 100 ... Equation (I)

[0056] When the spray force attenuation rate satisfies the above value, the spray force at a predetermined distance remains above a certain level and does not attenuate. As a result, the spray particles can quickly reach the desired treatment area, such as the floor or relatively low walls indoors, and the pest control effect can be quickly realized.

[0057] In the quantitative spray type aerosol for pest control of the present invention, the spray force at 25°C and 40cm is preferably 50mN or more, more preferably 70mN or more, and even more preferably 100mN or more. It is also preferably 400mN or less, more preferably 350mN or less, and even more preferably 300mN or less. The spray force at 25°C and 40cm is preferably 50-400mN, more preferably 70-350mN, and even more preferably 100-300mN. The spray force at 25°C and 20cm is also preferably 50mN or more, more preferably 100mN or more, and even more preferably 150mN or more. It is also preferably 500mN or less, more preferably 450mN or less, and even more preferably 400mN or less. The spray force at 25°C and 20cm is preferably 50-500mN, more preferably 100-450mN, and even more preferably 150-400mN. The spray force at 25°C and 40cm can be measured, for example, by spraying a metered-dose aerosol spray, conditioned to 25°C, horizontally from a position 40cm away from the spray receiving jig (a rectangular plate measuring 15cm x 15cm) attached to a digital force gauge. The spray force at 25°C and 20cm can be measured in the same way as at 40cm, except that 40cm is replaced with 20cm. Note that "horizontal" in the measurement of spray force refers to the direction perpendicular to the direction of gravity.

[0058] The above-mentioned spray force attenuation rate can be adjusted by setting the ratio of aerosol concentrate to propellant, the amount sprayed per spray operation, the nozzle diameter and shape, the internal pressure of the metered-dose spray aerosol at 25°C, the amount of aerosol concentrate sprayed L, the nozzle area S, and S / L to appropriate values.

[0059] In the quantitative spray type aerosol for pest control of the present invention, the S / L is preferably 5 or higher, more preferably 7 or higher, even more preferably 8 or higher, and particularly preferably 9 or higher. Also, it is preferably 40 or lower, more preferably 20 or lower, even more preferably 15 or lower, and particularly preferably 10 or lower. An S / L of 5 or higher allows the spray particles to be sufficiently diffused and adhered to the room, and an S / L of 40 or lower allows sufficient spray particles to adhere to low positions on the floor and walls without the spray particles completely volatilizing. The S / L is preferably 5 to 40, more preferably 7 to 20, even more preferably 8 to 15, and particularly preferably 9 to 10.

[0060] (injection time) The quantitative spray aerosol of the present invention has a spray time of preferably 0.8 seconds or less, more preferably 0.75 seconds or less, per spray operation. The spray time can be measured by the following method. (1) The nozzle of the laser diffraction particle size analyzer (Microtrac-Bell Co., Ltd., model number: LDSA-1400A) is positioned 5 cm away from the irradiation part, and a metered-volume spray aerosol that has been preheated to 25°C is fixed in place so that the laser beam is perpendicular to the spray direction. (2) Press the spray button of a metered-discharge aerosol once to spray the aerosol and record a video of the process. (3) Play the video and measure the longest continuous time during which the laser beam lit by the sprayed particles can be confirmed, in 0.01-second increments. Note that interruptions in the laser beam of 0.05 seconds or less will be considered continuous, and the measurement will be terminated when the laser beam cannot be confirmed for 0.06 seconds or more, with the last time the laser beam was confirmed to be lit being considered the spraying time.

[0061] (Pest control methods) The present invention relates to a pest control method using a quantitative spray type aerosol for pest control that sprays an aerosol composition, The aforementioned pest control method includes the step of spraying the aerosol composition horizontally, The aerosol composition comprises an aerosol concentrate containing an insecticide component and a solvent, and a propellant. In the aerosol composition, the volume ratio of the aerosol concentrate to the propellant is 5:95 to 50:50. The amount of the insecticide component in the aerosol concentrate is 3 to 70% by mass / volume. The present invention also relates to a pest control method in which the spray force decay rate of the aforementioned quantitative spray type aerosol for pest control is 10 to 50%, as expressed by the following formula (I). Jet force attenuation rate (%) = (1 - (jet force at 25°C and 40cm (mN) / jet force at 25°C and 20cm (mN))) × 100 ... Equation (I)

[0062] The present invention relates to a pest control method using a quantitative spray type aerosol for pest control that sprays an aerosol composition, The aforementioned pest control method includes the step of spraying the aerosol composition horizontally, The aerosol composition comprises an aerosol concentrate containing an insecticide component and a solvent, and a propellant. In the aerosol composition, the volume ratio of the aerosol concentrate to the propellant is 5:95 to 50:50. The amount of the insecticide component in the aerosol concentrate is 3 to 70% by mass / volume. The spray volume of the aerosol concentrate is L (mL), and the nozzle area is S (mm²). 2 This also relates to pest control methods, where the S / L ratio is 5-40.

[0063] The pest control method of the present invention includes the step of spraying an aerosol composition horizontally. In this embodiment, "horizontal" refers to directions including the downward direction and the upward direction at angles from 0° to 15° with respect to the horizontal direction of the floor surface.

[0064] The pest control method of the present invention described above involves spraying an aerosol composition horizontally using a predetermined quantitative spray type pest control aerosol, thereby quickly delivering sprayed particles to desired treatment locations such as indoor floors or relatively low walls. This reduces the amount of pest control components adhering to ceilings and walls where they would otherwise be unnecessary, thereby reducing the risk of contact between the user and the pest control components, and also suppressing the overuse of pest control components.

[0065] The volume of the indoor space in which the pest control method of the present invention is implemented is not particularly limited, but the floor area is 1.5 m². 2 Any space of the above size is acceptable. In particular, a volume equivalent to a room of 1.5 to 24 tatami mats (approximately 6.0 to 97.2 m²) is sufficient. 3 It is preferable that the volume be equivalent to a room of 3 to 12 tatami mats (approximately 12.2 to 48.6 m²). 3 It is more preferable that it is equivalent to the above. Even if the indoor space is larger than the above volume, a similar pest control effect can be obtained by adjusting the number of sprays according to the volume of the indoor space. Furthermore, the gaps in this invention include gaps between indoor furniture and home appliances and walls, as well as gaps between furniture and home appliances themselves.

[0066] The indoor space in which the pest control method of the present invention is implemented may be sealed, or it may have a ventilation condition of 0.5 to 1 times per hour. This ventilation condition is a technical term that means how many times the air in the indoor space is replaced in one hour, and can be calculated by supplying carbon dioxide to the indoor space and measuring the decrease in its concentration due to ventilation. According to the pest control method of the present invention, spray particles can be quickly delivered to desired treatment locations, such as relatively low positions on the indoor floor or wall surface, especially behind furniture, etc., so an excellent control effect can be obtained even with a ventilation condition of 0.5 to 1 time per hour. [Examples]

[0067] The present invention will be specifically described below with reference to examples, but the present invention is not limited to the examples below.

[0068] 1. Preparation of a quantitative spray type aerosol for pest control. According to Table 1, quantitative spray type aerosols for pest control were prepared for Examples 1 to 16 and Comparative Example 1.

[0069] (Example 1) At 25°C and 1 atm, 25g of transfluthrin was mixed with kerosene No. 1 to make up 100mL to prepare the stock solution. Four mL of the undiluted solution was filled into a pressure-resistant aerosol can (outer diameter φ35 mm x total length 84 mm; full capacity 71 mL), and the can was closed with a metered-dose spray valve (single spray volume 0.2 mL). Subsequently, 21 mL of liquefied petroleum gas (LPG) (vapor pressure at 25°C: 0.49 MPa) was pressurized and filled as a propellant. A metered-dose spray type aerosol for pest control was obtained by attaching one spray button (nozzle diameter: φ0.60 mm) to a metered-dose spray valve, resulting in a spray volume of 0.2 mL per operation and a discharge volume of 8 mg of pest control ingredient.

[0070] (Example 2) Except for changing the solvent from kerosene No. 1 to isopropanol (hereinafter also referred to as "IPA") and changing the spray button to one with a nozzle diameter of φ0.90 mm, a quantitative spray type aerosol for pest control was obtained in the same manner as in Example 1, with a spray volume of 0.2 mL per operation and a discharge volume of 8 mg of pest control component.

[0071] (Example 3) Except for preparing the stock solution by adding IPA to 50 g of transfluthrin to make up 100 mL, a quantitative spray type aerosol for pest control was obtained in the same manner as in Example 1, with a spray volume of 0.2 mL per operation and a discharge volume of 16 mg of the pest control component.

[0072] (Example 4) Except for preparing the stock solution by adding ethanol to 50 g of transfluthrin to make up 100 mL, a quantitative spray type aerosol for pest control was obtained in the same manner as in Example 1, with a spray volume of 0.2 mL per operation and a discharge volume of 16 mg of the pest control component.

[0073] (Example 5) Except for preparing the stock solution by adding IPA to 50 g of transfluthrin to make up 100 mL, and changing the spray button to one with a nozzle diameter of φ0.90 mm, a quantitative spray type aerosol for pest control was obtained in the same manner as in Example 1, with a spray volume of 0.2 mL per operation and a discharge volume of 16 mg of the pest control component.

[0074] (Example 6) Except for preparing the stock solution by adding isopropyl myristate (hereinafter also referred to as "IPM") to 25 g of transfluthrin to make up 100 mL, a quantitative spray type aerosol for pest control was obtained in the same manner as in Example 1, with a spray volume of 0.2 mL per operation and a discharge volume of 8 mg of the pest control component.

[0075] (Example 7) Except for preparing the stock solution by adding IPA to 12.5 g of transfluthrin to make up 100 mL, closing the pressure-resistant aerosol can with a metered-dose spray valve (0.4 mL per spray), and changing the spray button to one with a nozzle diameter of φ0.90 mm, a metered-dose spray type aerosol for pest control was obtained with a spray volume of 0.4 mL per operation and a discharge volume of 8 mg of the pest control component.

[0076] (Example 8) Except for preparing the stock solution by adding IPA to 100 mL of transfluthrin, closing the pressure-resistant aerosol can with a metered-dose spray valve (0.5 mL per spray), and changing the spray button to one with a nozzle diameter of φ0.90 mm, a metered-dose spray type aerosol for pest control was obtained with a spray volume of 0.5 mL per operation and a discharge volume of 8 mg of the pest control component.

[0077] (Example 9) A stock solution was prepared by adding IPM to 4 g of metofluthrin and diluting it to 100 mL. 10 mL of the undiluted solution was filled into an aerosol pressure can, and the can was closed with a metered spray valve (0.5 mL per spray). Subsequently, 15 mL of LPG (vapor pressure at 25°C: 0.49 MPa) was pressurized and filled as a propellant. A metered-dose spray type aerosol for pest control was obtained by attaching one spray button (nozzle diameter: φ1.2 mm) to a metered-dose spray valve, with a spray volume of 0.5 mL per operation and a discharge volume of 8 mg of pest control ingredient.

[0078] (Example 10) Except for preparing the stock solution by adding IPA to 100 mL of transfluthrin, closing the pressure-resistant aerosol can with a metered-dose spray valve (0.5 mL per spray), and changing the spray button to one with a nozzle diameter of φ1.2 mm, a metered-dose spray type aerosol for pest control was obtained with a spray volume of 0.5 mL per operation and a discharge volume of 8 mg of the pest control component.

[0079] (Example 11) Except for preparing the stock solution by adding IPA to 20 g of transfluthrin to make up to 100 mL, closing the pressure-resistant aerosol can with a metered-dose spray valve (0.5 mL per spray), and changing the spray button to one with a nozzle diameter of φ0.90 mm, a metered-dose spray type aerosol for pest control was obtained with a spray volume of 0.5 mL per operation and a discharge volume of 16 mg of the pest control component.

[0080] (Example 12) Except for preparing the stock solution by adding IPA to 20 g of transfluthrin to make up 100 mL, closing the pressure-resistant aerosol can with a metered-dose spray valve (0.5 mL per spray), and changing the spray button to one with a nozzle diameter of φ1.2 mm, a metered-dose spray type aerosol for pest control was obtained with a spray volume of 0.5 mL per operation and a discharge volume of 16 mg of the pest control component.

[0081] (Example 13) At 25°C and 1 atm, 16 g of transfluthrin was mixed with IPA to make up 100 mL to prepare the stock solution. 6.25 mL of the undiluted solution was filled into an aerosol pressure can, and the can was closed with a metered spray valve (0.5 mL per spray). Subsequently, 18.75 mL of LPG (vapor pressure at 25°C: 0.49 MPa) was pressurized and filled as a propellant. A metered-dose spray type aerosol for pest control was obtained by attaching one spray button (nozzle diameter: φ0.90 mm) to a metered-dose spray valve, with a spray volume of 0.5 mL per operation and a discharge volume of 20 mg of pest control ingredient.

[0082] (Example 14) At 25°C and 1 atm, 3.81 g of transfluthrin was mixed with IPM to make up 100 mL to prepare the stock solution. 7.5 mL of the undiluted solution was filled into an aerosol pressure can, and the can was closed with a metered spray valve (0.7 mL per spray). Subsequently, 17.5 mL of LPG (vapor pressure at 25°C: 0.49 MPa) was pressurized and filled as a propellant. A metered-dose spray type aerosol for pest control was obtained by attaching one spray button (nozzle diameter: φ1.2 mm) to a metered-dose spray valve, resulting in a spray volume of 0.7 mL per operation and a discharge volume of 8 mg of pest control ingredient.

[0083] (Example 15) At 25°C and 1 atm, 10 g of transfluthrin was mixed with ethanol to make a total volume of 100 mL to prepare the stock solution. 2.5 mL of the undiluted solution was filled into an aerosol pressure can, and the can was closed with a metered spray valve (0.8 mL per spray). Subsequently, 22.5 mL of LPG (vapor pressure at 25°C: 0.49 MPa) was pressurized and filled as a propellant. A metered-dose spray type aerosol for pest control was obtained by attaching one spray button (nozzle diameter: φ0.90 mm) to a metered-dose spray valve, resulting in a spray volume of 0.8 mL and a discharge volume of 8 mg of pest control ingredient per operation.

[0084] (Example 16) At 25°C and 1 atm, 20 g of transfluthrin was mixed with IPM to make up 100 mL to prepare the stock solution. Two mL of the undiluted solution was filled into an aerosol pressure can, and the can was closed with a metered spray valve (1 mL per spray). Subsequently, 23 mL of LPG (vapor pressure at 25°C: 0.49 MPa) was pressurized and filled as a propellant. A metered-dose spray type aerosol for pest control was obtained by attaching a spray button with a nozzle diameter of φ2.0 mm to a metered-dose spray valve, resulting in a spray volume of 1 mL and a discharge volume of 2 mg of pest control ingredient per operation.

[0085] (Comparative Example 1) At 25°C and 1 atm, 20 g of transfluthrin was mixed with IPA to make up 100 mL to prepare the stock solution. 1.25 mL of the undiluted solution was filled into an aerosol pressure can, and the can was closed with a metered spray valve (0.8 mL per spray). Subsequently, 23.75 mL of LPG (vapor pressure at 25°C: 0.49 MPa) was pressurized and filled as a propellant. A metered-dose spray type aerosol for pest control was obtained by attaching one spray button (nozzle diameter: φ0.40 mm) to a metered-dose spray valve, resulting in a spray volume of 0.8 mL and a discharge volume of 8 mg of pest control ingredient per operation.

[0086] 2. Measurement of jet force The "jet force at 25°C and 40cm" was measured using the following procedure. (1) A digital force gauge (manufactured by Imada Co., Ltd., model number: DST-2N) with a jet receiving jig (15cm x 15cm stainless steel plate, material: SUS304, part number: TS150-150-05) attached was fixed to the base. The digital force gauge was set to display the maximum value of the detected load. (2) A metered-volume spray aerosol, preheated to 25°C, was fixed in place so that the nozzle was positioned 40 cm away from the center of the spray receiving jig. (3) The spray button of a metered-dose aerosol was pressed once to spray the aerosol horizontally (perpendicular to the direction of gravity), and the spray was received from the front by a spray receiving jig. The maximum value of the displayed load was read and recorded. (4) Measurements were taken five times, and the average value was taken as the jet force at 25°C and 40cm. The entire process was carried out in a 25°C environment. Furthermore, measurements were taken using the same method, except that the distance from the digital force gauge used for measurement to the nozzle was changed from 40 cm to 20 cm, and the results are listed in Table 1 as "Injection force at 25°C and 20 cm".

[0087] Using the measured "injection force at 25°C and 40cm" and "injection force at 25°C and 20cm," the injection force attenuation rate expressed by the following formula (I) was calculated. The values ​​are shown in Table 1. Jet force attenuation rate (%) = (1 - (jet force at 25°C and 40cm (mN) / jet force at 25°C and 20cm (mN))) × 100 ... Equation (I)

[0088] 3. Test to measure the effectiveness of pest control The pest control efficacy test was conducted using the following procedure. (1) 31.1m maintained at 25℃ 3 In a sealed test chamber measuring (3.6m x 3.6m x 2.4m high), the specimen was fixed so that the nozzle of a metered-dose aerosol spray was positioned at the following spray location. Injection position: 90 cm away from the center of any wall in the width direction of the test chamber, and at a height of 120 cm. (2) Metal cages (10cm x 20cm x 5cm high) containing 10 adult female Culex pipiens mosquitoes (5 days post-emergence) were placed at the respective locations of "floor," "front gap," and "back gap" as test insects. The "floor" refers to the floor 180cm away from the nozzle tip of the metered-dose aerosol in the direction of spraying. The "front gap" refers to the inside of a cylinder with an inner diameter of 20cm x a length of 42cm placed in the left rear corner when the direction of spraying the aerosol is considered to be forward. The "back gap" refers to the inside of a cylinder with an inner diameter of 20cm x a length of 42cm placed in the right front corner when the direction of spraying the aerosol is considered to be forward. The cylinders were used with one end of the opening closed, and for the "front gap," the opening end was positioned directly facing the wall opposite the direction of spraying, and both the side and the opening end of the cylinder were positioned 2cm away from the wall. Regarding the "back gap," the cylinder was positioned so that the opening end faced the wall in the direction of spraying, with both the side and the opening end being 2 cm away from the wall. To explain the test room used for the pest control efficacy measurement test, Figure 1 shows a top view of the room, and Figure 2 shows a perspective view. (3) The spray button of the metered-dose aerosol was pressed once to spray the aerosol once towards the center of the test chamber. At this time, the nozzle of the metered-dose aerosol and the direction of aerosol spray were fixed so that they were horizontal (perpendicular to the direction of gravity). (4) After spraying, the number of test insects that had fallen and become startled was counted every 3 minutes, and the time until 10% of the test insects had fallen and become startled (KT10 (minutes)) and the time until half of the test insects had fallen and become startled (KT50 (minutes)) were determined. KT10 (minutes) and KT50 (minutes) were calculated using the probit method with statistical software (IBM SPSS Statistics Ver.26, manufactured by IBM). The results are shown in Table 1.

[0089] [Table 1]

[0090] As shown in Table 1, the quantitative spray type aerosols for pest control of Examples 1 to 16 demonstrated excellent control efficacy on floor surfaces, front gaps, and back gaps.

Claims

1. The product includes an aerosol concentrate containing pest control ingredients and a solvent, and an aerosol composition containing a propellant. In the aerosol composition, the volume ratio of the aerosol concentrate to the propellant is 5:95 to 50:

50. The amount of the insecticide component in the aerosol concentrate is 3 to 70% by mass / volume. The aforementioned pest control component includes a pyrethroid compound that is volatile at room temperature. The injection force attenuation rate, expressed by the following formula (I), is between 10% and 50%. A quantitative spray type aerosol for pest control. Injection force attenuation rate (%) = (1 - (Injection force at 25°C and 40cm (mN) / Injection force at 25°C and 20cm (mN))) × 100 ... Equation (I)

2. The product includes an aerosol concentrate containing pest control ingredients and a solvent, and an aerosol composition containing a propellant. In the aerosol composition, the volume ratio of the aerosol concentrate to the propellant is 5:95 to 50:

50. The amount of the insecticide component in the aerosol concentrate is 3 to 70% by mass / volume. The aforementioned pest control component includes a pyrethroid compound that is volatile at room temperature. The amount of aerosol concentrate sprayed is L (mL), and the nozzle area is S (mm²). ２ A quantitative spray type aerosol for pest control in which the S / L ratio is 5 to 40.

3. The quantitative spray type aerosol for pest control according to claim 1 or 2, wherein the aerosol stock solution contains 7.5 to 25% by mass / volume of the room-temperature volatile pyrethroid compound.

4. The quantitative spray type aerosol for pest control according to claim 1 or 2, wherein the solvent is a lower alcohol.

5. The quantitative spray type aerosol for pest control according to claim 1 or 2, wherein the amount L of the aerosol concentrate sprayed per single spray operation is 0.02 mL to 0.15 mL.

6. Nozzle area S is 0.2 mm ２ ~3mm ２ The quantitative spray type aerosol for pest control according to claim 1 or 2.

7. A method of pest control using a quantitative spray type aerosol for pest control that sprays an aerosol composition, The aforementioned pest control method includes the step of spraying the aerosol composition horizontally, The aerosol composition comprises an aerosol concentrate containing an insecticide component and a solvent, and a propellant. In the aerosol composition, the volume ratio of the aerosol concentrate to the propellant is 5:95 to 50:

50. The amount of the insecticide component in the aerosol concentrate is 3 to 70% by mass / volume. The aforementioned pest control component includes a pyrethroid compound that is volatile at room temperature. A method for controlling pests, wherein the spray force attenuation rate of the aforementioned quantitative spray type aerosol for pest control is 10 to 50%, as expressed by the following formula (I). Injection force attenuation rate (%) = (1 - (Injection force at 25°C and 40cm (mN) / Injection force at 25°C and 20cm (mN))) × 100 ... Equation (I)

8. A method of pest control using a quantitative spray type aerosol for pest control that sprays an aerosol composition, The aforementioned pest control method includes the step of spraying the aerosol composition horizontally, The aerosol composition comprises an aerosol concentrate containing an insecticide component and a solvent, and a propellant. In the aerosol composition, the volume ratio of the aerosol concentrate to the propellant is 5:95 to 50:

50. The amount of the insecticide component in the aerosol concentrate is 3 to 70% by mass / volume. The aforementioned pest control component includes a pyrethroid compound that is volatile at room temperature. The amount of aerosol concentrate sprayed is L (mL), and the nozzle area is S (mm²). ２ A pest control method in which, when given the following conditions, the S / L ratio is 5 to 40.

9. The pest control method according to claim 7 or 8, wherein the step of spraying the aerosol composition horizontally is a step of spraying the aerosol composition in a direction including a downward direction and an upward direction at an angle of 0° to 15° with respect to the horizontal direction of the floor surface.

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