Pest control aerosol and pest control method

Abstract

Provided is a fixed-dose spray type pest control aerosol for spatial treatment, which has improved control effect against creeping pests. Solution: Vapor pressure at 30°C is 1.5 x 10 -3 A pest control aerosol comprising an aerosol concentrate containing an insecticidal component and a solvent, and a propellant, filled in an aerosol container equipped with a metered injection valve, wherein the aerosol concentrate has a specific gravity of 0.82 to 1.25 at 20°C and a viscosity η at 10°C of less than 0.82 mmHg. 10 is 3.2 to 60.0 mPa·s, and the viscosity η at 30°C 30 and viscosity η at 10°C 10 Ratio η 30 / η 10 is 0.40 to 0.92, and the volume of the metered spray valve per spray is 0.1 to 3.0 mL.

Description

[Technical Field]

[0001] The present invention relates to a pest control aerosol obtained by filling an aerosol concentrate containing an insecticidal component and a solvent, and a propellant, into an aerosol container equipped with a metered-dose injection valve, and to a pest control method using the pest control aerosol. [Background technology]

[0002] Typical insecticides that target crawling pests such as cockroaches and bedbugs that roam floors and walls and are applied to areas where crawling pests live or their paths include (1) fumigants, (2) full-volume aerosol sprays, (3) paint-on aerosol sprays, and (4) baits, each of which has its own unique formulation.

[0003] (1) Fumigants and (2) total-discharge aerosols are methods of dispersing chemicals throughout a room in one go, sealing the room for a specified period of time to increase the chemical concentration, and since people are not allowed to enter the room during that time, they fall into the category of pharmaceuticals. These formulations are characterized by the fact that the dispersed chemicals are highly effective against crawling pests throughout the entire treatment space, making them so-called spatial treatments. However, these formulations require time and effort, such as preserving electrical appliances and tableware before treatment and cleaning up the sprayed sediment after treatment. Furthermore, special attention must be paid to the safety of the chemicals, making them difficult to say that they are formulations that can be easily and frequently adopted.

[0004] On the other hand, (3) aerosol paints, which are applied locally to the surface, and (4) baits, which are applied point-by-point, are quasi-drugs that have a mild effect on the human body, and are easier to use than (1) fumigants and (2) full-volume spray aerosols. However, because they are not spatial treatments, the contact efficiency between the agent and pests is lower, and they do not necessarily provide an efficient extermination method.

[0005] Thus, it has been thought that it would be difficult to develop a control agent for crawling pests that is a spatial treatment and also qualifies as a quasi-drug.

[0006] The present inventors previously conducted extensive research to develop a spatial treatment agent for controlling crawling pests that is a quasi-drug and that provides sufficient control for practical use when sprayed using a metered-volume aerosol, rather than formulations such as (1) fumigants or (2) total-volume aerosols, and aimed to develop a highly safe formulation that can be used even in situations where people are present. As a result, they invented a method for controlling pests and mites that is effective not only against crawling pests, but also against flying pests on the day of spraying (see Patent Document 1). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-63576 Summary of the Invention [Problem to be solved by the invention]

[0008] The pest and mite control method of Patent Document 1 aims to achieve practical extermination effects not only against crawling pests but also against flying pests, and is highly practical. In this pest and mite control method, the aerosol spray characteristics are such that the spray particles after spraying are formed into floating particles and adhesive particles that adhere to walls and settle on floors. The inventors have conducted extensive research to further improve the control effect of a metered-dose aerosol used for spatial treatment against crawling pests, particularly cockroaches.

[0009] During the investigation, we came to the conclusion that in order to improve the control effect of spatial treatment against crawling pests, especially cockroaches, it is important to give even more priority to adhesive particles compared to the spray characteristics of Patent Document 1, to increase the proportion of particles that settle on the floor rather than adhere to the wall, and to ensure that the particles adhere uniformly to the entire floor surface.

[0010] After spraying an aerosol, the temperature of the aerosol concentrate drops due to the heat of vaporization of the propellant. The inventors have found that this change in viscosity with temperature, i.e., the viscosity ratio of the aerosol concentrate with respect to temperature, is an important factor in determining the behavior of adhesive particles involved in sedimentation. As a result of repeated trial and error and tests, they have identified the specific gravity of the aerosol concentrate and the viscosity ratio with respect to temperature within an optimal range, thereby completing the present invention.

[0011] The object of the present invention is to provide a pest control aerosol that is a metered dose type aerosol used for space spraying and has improved control effect against crawling pests, and further to provide a pest control method using said pest control aerosol. [Means for solving the problem]

[0012] The characteristic configuration of the pest control aerosol according to the present invention for solving the above problems is as follows: Vapor pressure at 30°C is 1.5 x 10 -3 1. A pest control aerosol comprising an aerosol concentrate containing an insecticidal component and a solvent, the concentration of which is less than mmHg, and a propellant, filled into an aerosol container equipped with a metered injection valve, The aerosol concentrate has a specific gravity of 0.82 to 1.25 at 20°C and a viscosity η 10 is 3.2 to 60.0 mPa·s, and the viscosity η at 30°C 30 and viscosity η at 10°C 10 Ratio η 30 / η 10 is 0.40 to 0.92, The metered injection valve has a single injection volume of 0.1 to 3.0 mL.

[0013] According to the pest control aerosol of this configuration, the specific gravity of the aerosol concentrate at 20°C and the viscosity at 10°C η 10 , and viscosity η at 30 ° C. 30 and viscosity η at 10°C 10 Ratio η 30 / η 10When the viscosity of the aerosol concentrate is within the above range, the viscosity of the aerosol concentrate does not change suddenly after spraying due to temperature changes caused by the heat of vaporization of the propellant, etc., so the spray particles diffuse appropriately and settle quickly. As a result, the insecticidal component contained in the spray particles adheres to the entire floor surface, providing excellent control effects against crawling pests such as cockroaches and bedbugs. Furthermore, when the spray volume per spray of the metered dose valve is within the above range, the amount of insecticidal component released is appropriate by spraying the aerosol concentrate one or several times, providing practically sufficient control effects against crawling pests such as cockroaches and bedbugs.

[0014] In the pest control aerosol according to the present invention, The specific gravity of the aerosol concentrate at 20°C is p, and the ratio η 30 / η 10 When q is taken as (p)·(q) 2 is preferably 0.17 to 1.00.

[0015] In the pest control aerosol of this configuration, the specific gravity of the aerosol concentrate at 20°C is p, and the ratio η 30 / η 10 When q is taken as (p)·(q) 2 By setting (p)·(q) in the above range, the spray particles formed by spraying the aerosol have improved diffusibility and settling properties, and as a result, the insecticidal components contained in the spray particles can be uniformly attached to the entire floor surface. Therefore, (p)·(q) 2 By preparing an aerosol concentrate using the parameter expressed as an index, it becomes possible to design a pest control aerosol as a fixed-amount spray type aerosol that can exert excellent pest control effects on spaces and floor surfaces, which have previously only been achieved with fumigants or total-amount spray type aerosols.

[0016] In the pest control aerosol according to the present invention, The insecticidal component preferably contains transfluthrin and / or metofluthrin.

[0017] According to the pest control aerosol of this configuration, the insecticidal component contains transfluthrin and / or metofluthrin, and therefore, it can exert an excellent control effect against crawling pests such as cockroaches and bedbugs.

[0018] In the pest control aerosol according to the present invention, It is preferable to control creeping pests.

[0019] The pest control aerosol of this configuration has excellent dispersion and settling properties of the spray particles formed by spraying, allowing the insecticidal component contained in the spray particles to adhere to the entire floor surface, thereby providing excellent control effects against crawling pests such as cockroaches and bedbugs that roam the floor.

[0020] The characteristic configuration of the pest control method according to the present invention for solving the above problems is as follows: Vapor pressure at 30°C is 1.5 x 10 -3 A pest control method for spraying an insect pest control aerosol, the method comprising filling an aerosol concentrate containing an insecticidal component and a solvent, and a propellant, into an aerosol container equipped with a metered injection valve, the method comprising: The aerosol concentrate has a specific gravity of 0.82 to 1.25 at 20°C and a viscosity η 10 is 3.2 to 60.0 mPa·s, and the viscosity η at 30°C 30 and viscosity η at 10°C 10 Ratio η 30 / η 10 is 0.40 to 0.92, The metered injection valve has a single injection volume of 0.1 to 3.0 mL, The pest control aerosol is sprayed indoors toward a space.

[0021] According to the pest control method of this configuration, the specific gravity of the aerosol concentrate at 20°C and the viscosity at 10°C η 10 , and viscosity η at 30 ° C. 30 and viscosity η at 10°C 10 Ratio η 30 / η 10 With the viscosity being within the above range, when the pest control aerosol is sprayed indoors into an air space, the viscosity of the aerosol concentrate does not change suddenly due to temperature changes caused by the heat of vaporization of the propellant, etc., and the spray particles diffuse appropriately while quickly settling. As a result, the insecticidal component contained in the spray particles adheres to the entire floor surface, providing excellent control effects against crawling pests such as cockroaches and bedbugs. Furthermore, with the spray volume per spray of the metered dose valve being within the above range, the amount of insecticidal component released can be appropriate by spraying the aerosol concentrate one or several times, providing practically sufficient control effects against crawling pests such as cockroaches and bedbugs. DETAILED DESCRIPTION OF THE INVENTION

[0022] The pest control aerosol and pest control method of the present invention will be described below, although it is not intended that the present invention be limited to the configurations described below.

[0023] [Aerosol for pest control] The pest control aerosol of the present invention is a metered dose aerosol used to control crawling pests by spatial treatment, and is composed of an aerosol concentrate containing an insecticidal component and a solvent, and a propellant, filled into an aerosol container equipped with a metered dose valve.

[0024] <Concentrated aerosol> In the pest control aerosol of the present invention, the viscosity η of the aerosol concentrate at 10 ° C. 10 The viscosity η of the aerosol concentrate at 30°C is adjusted to 3.2 to 60.0 mPa·s, preferably 4.0 to 20.0 mPa·s, and more preferably 4.0 to 15.0 mPa·s. 30 and viscosity η at 10°C 10 Ratio η 30 / η 10 is adjusted to 0.40 to 0.92, preferably 0.60 to 0.90. 10 , and the ratio η 30 / η 10If the viscosity η is within the above range, the viscosity of the aerosol concentrate will not change suddenly due to temperature changes, and when a certain amount of the pest control aerosol of the present invention is sprayed into an indoor treatment space, the sprayed particles will diffuse appropriately and settle quickly. As a result, the insecticidal component contained in the sprayed particles will adhere to the entire floor surface, and an excellent control effect against crawling pests such as cockroaches and bedbugs can be achieved. 10 If the ratio η is out of the above range, the temperature of the aerosol concentrate will drop after spraying due to the heat of vaporization of the propellant, etc., and the spray particles will not have sufficient diffusibility and sedimentation properties, which may result in an insufficient amount of the insecticidal component adhering to the floor surface or a large imbalance in the state of adhesion of the insecticidal component. 30 / η 10 If the ratio is less than 0.40, the dispersion of spray particles may be insufficient, and the ratio η 30 / η 10 If the viscosity of the aerosol concentrate at 30°C is η 30 The viscosity η of the aerosol concentrate is preferably adjusted to 2.0 to 26.0 mPa·s, more preferably 2.5 to 20.0 mPa·s, and even more preferably 3.0 to 15.0 mPa·s. 10 and η 30 In this embodiment, the aerosol concentrate placed in a beaker was adjusted to 10°C or 30°C in a thermostatic water bath (manufactured by IWAKI), and the viscosity at each temperature was measured (measurement conditions: 60 rpm, 30 seconds) using a B-type viscometer (manufactured by Tokyo Keiki Co., Ltd., rotor No. 1).

[0025] In the pest control aerosol of the present invention, the specific gravity of the aerosol concentrate at 20°C is adjusted to 0.82 to 1.25, preferably 0.83 to 1.20, and more preferably 0.85 to 1.05. The specific gravity of the aerosol concentrate can be adjusted by changing the mixing ratio of the insecticidal component to the solvent or by adding other components. When the specific gravity of the aerosol concentrate at 20°C is in the range of 0.82 to 1.25, when a certain amount of the pest control aerosol of the present invention is sprayed into an indoor treatment space, the insecticidal component spreads and adheres almost uniformly over the entire floor surface, thereby achieving excellent control effects against crawling pests such as cockroaches and bedbugs, and flying pests such as mosquitoes and flies in indoor spaces, and particularly excellent control effects against crawling pests such as cockroaches and bedbugs. In this specification, the term "control effect" refers to the extermination effect based on the knockdown effect and lethal effect, as well as the repellent effect. Even if the extermination effect is low, sufficient repellent effect can often achieve practical control. Furthermore, if the specific gravity of the aerosol concentrate at 20°C is within the above range, the adhesive particles will penetrate into gaps and hidden areas during the process of settling. Therefore, when a pyrethroid compound is used as the insecticidal component, a flushing effect can be fully expected, causing cockroaches and other insects to fly out from gaps and hidden areas. If the specific gravity of the aerosol concentrate at 20°C is less than 0.82, there is a risk that the amount of sprayed particles adhering to the floor surface will be insufficient. If the specific gravity of the aerosol concentrate at 20°C exceeds 1.25, there is a risk that the insecticidal component will not adhere uniformly to the floor surface.

[0026] Meanwhile, the present inventors have conducted research to further improve the pest control effect of pest control aerosols, and have found that, when the specific gravity of the aerosol concentrate at 20°C is p, the ratio η 30 / η 10 When q is taken as (p)·(q) 2 It has been found that by setting (p)·(q) in an appropriate range, it is possible to achieve pest control treatment of an entire space or floor surface, like conventional fumigants or total-amount spray aerosols, even though the aerosol is a fixed-amount spray type that does not require special preparation for spatial treatment. 2is preferably adjusted to 0.17 to 1.00, more preferably adjusted to 0.17 to 0.69, even more preferably adjusted to 0.40 to 0.69, and most preferably adjusted to 0.55 to 0.65. (p)·(q) 2 If (p)·(q) is in the range of 0.17 to 1.00, the spray particles formed by spraying the aerosol have improved diffusibility and sedimentation properties, and as a result, the insecticidal component contained in the spray particles adheres uniformly to the entire floor surface. Therefore, the control effect against crawling pests can be further improved. Thus, the pest control aerosol of the present invention has a pesticidal effect of (p)·(q) 2 By preparing the aerosol concentrate using the parameter expressed as an index, it is possible to adopt a simple configuration of a fixed-amount aerosol, while being able to exert an extremely excellent pest control effect on spaces and floors that could only be achieved with fumigants or total-amount aerosols until now, making it a revolutionary product that has never been seen before.

[0027] The insecticide component, which is one of the main components of the aerosol concentrate, has a vapor pressure of 1.5 x 10 at 30°C. -3 Insecticidal components with a viscosity of less than mmHg are used. Specific examples include pyrethroid compounds such as transfluthrin, metofluthrin, profluthrin, telallethrin, furamethrin, momfluorothrin, dimefluthrin, mepafluthrin, heptafluthrin, fenothrin, cyphenothrin, permethrin, cypermethrin, cyfluthrin, bifenthrin, fenpropathrin, tralomethrin, etofenprox, imiprothrin, allethrin, phthalthrin, prallethrin, resmethrin, and natural pyrethrins, silicon compounds such as silafluofen, organophosphorus compounds such as dichlorvos and fenitrothion, carbamate compounds such as propoxur, neonicotinoid compounds such as dinotefuran, imidacloprid, and clothianidin, fipronil, indoxacarb, and methoxadiazone. Considering stability, basic insecticidal efficacy, etc., the vapor pressure at 30°C is 1.0 x 10 -4 mmHg or more, 1.5 × 10 -3Pyrethroid insecticidal components with a viscosity of less than mmHg are preferred, and specific examples include transfluthrin, metofluthrin, and profluthrin. The above insecticidal components can be used alone or in combination, and it is preferable to use those containing transfluthrin and / or metofluthrin. Note that when optical isomers or geometric isomers based on asymmetric carbons exist in the acid component or alcohol moiety of a pyrethroid compound, each of these isomers and any mixture thereof are also included in the compound for controlling crawling pests.

[0028] The content of the insecticidal component in the aerosol concentrate is not particularly limited, but is preferably 8 to 80 w / v%, more preferably 10 to 70 w / v%. If the content of the insecticidal component in the aerosol concentrate is within the above range, the specific gravity at 20°C and the viscosity at 10°C η 10 , and viscosity η at 30 ° C. 30 and viscosity η at 10°C 10 Ratio η 30 / η 10 can be set within an appropriate range. As a result, when the aerosol is sprayed, the spray particles are formed in a state suitable for controlling crawling pests by spatial treatment, and an appropriate control effect can be obtained.

[0029] The aerosol concentrate contains a solvent in addition to the above-mentioned insecticidal component. The solvent dissolves the above-mentioned insecticidal component and makes the aerosol concentrate have an appropriate specific gravity and a ratio η 30 / η 10An organic solvent that can be adjusted to the desired viscosity is used. Examples of such organic solvents include lower alcohols having 2 to 3 carbon atoms, such as ethanol, normal propanol, and isopropanol (IPA), hydrocarbon solvents such as normal paraffin and isoparaffin, higher fatty acid esters having 16 to 20 carbon atoms, such as isopropyl myristate (IPM) and hexyl laurate, glycol ether solvents having 3 to 10 carbon atoms, and ketone solvents. Among these, lower alcohols having 2 to 3 carbon atoms, hydrocarbon solvents, and higher fatty acid esters having 16 to 20 carbon atoms are preferred, lower alcohols having 2 to 3 carbon atoms are more preferred, and ethanol is even more preferred.

[0030] In addition to the above components, the aerosol concentrate may also contain, as appropriate, antifungal agents, antibacterial agents, disinfectants, fragrances, deodorizers, stabilizers, antistatic agents, antifoaming agents, synergists, excipients, etc., which are intended to target molds, fungi, etc. Examples of antifungal agents, antibacterial agents, and disinfectants include hinokitiol, 2-mercaptobenzothiazole, 2-(4-thiazolyl)benzimidazole, 5-chloro-2-methyl-4-isothiazolin-3-one, triforine, 3-methyl-4-isopropylphenol, and ortho-phenylphenol. Examples of aromatic agents include orange oil, lemon oil, lavender oil, peppermint oil, eucalyptus oil, citronella oil, lime oil, yuzu oil, jasmine oil, cypress oil, green tea essential oil, limonene, α-pinene, linalool, geraniol, phenylethyl alcohol, amyl cinnamic aldehyde, cumin aldehyde, and benzyl acetate, as well as fragrance ingredients containing leaf alcohol and leaf aldehyde, known as the "green scent." Examples of synergists include piperonyl butoxide and octyl bicycloheptene dicarboximide.

[0031] <Propellant> Examples of propellants used in the pest control aerosol of the present invention include liquefied petroleum gases (LPG) such as propane, normal butane, and isobutane; liquefied gases such as normal pentane, isopentane, dimethyl ether (DME), and hydrofluoroolefins such as HFO1234ze; and compressed gases such as nitrogen gas, carbon dioxide gas, nitrous oxide, and compressed air. While the above propellants can be used alone or in a mixture, propellants containing LPG as the main component are easy to use. It is preferable to adjust the gauge pressure (20°C) of the propellant to 0.1 to 0.7 MPa before use.

[0032] The volume ratio (a) / (a+b) of the aerosol concentrate (a) to the propellant (b) filled in the aerosol container is preferably adjusted to 0.02 to 0.5 by volume, more preferably 0.05 to 0.5, and even more preferably 0.1 to 0.4. If the volume ratio (a) / (a+b) is within the above range, a sufficient amount of the insecticidal component can be dispersed uniformly over the entire floor surface.

[0033] The pest control aerosol of the present invention has a spray volume per spray from the metered spray valve set to 0.1 to 3.0 mL, preferably 0.2 to 1.0 mL, and more preferably 0.2 to 0.9 mL. If the spray volume is within the above range, the amount of the insecticidal component released can be, for example, 0.1 to 50 mg / m by spraying the pest control aerosol once or several times. 3 The degree of insect pest control is appropriate, and a practically sufficient control effect against crawling pests can be obtained in the treated space.

[0034] The pest control aerosol of the present invention is preferably set to have a spray force of 3 to 50 gf at a distance of 5 cm from the nozzle, more preferably 5 to 40 gf, and even more preferably 10 to 35 gf. If the spray force is 3 to 50 gf, most of the insecticidal component will quickly settle and adhere to the entire floor surface of the indoor treatment space, thereby achieving a practically sufficient control effect against crawling pests. This spray force can be appropriately adjusted by the composition of the aerosol concentrate, the internal pressure of the aerosol container, the shape of the nozzle, and the like. In this embodiment, the spray force of the pest control aerosol was measured using a digital force gauge (FGC-0.5, manufactured by Nidec-Shimpo Corporation).

[0035] The shapes of the nozzle, nozzle, container, etc., and the operation button of the pest control aerosol of the present invention can be selected appropriately depending on the application, purpose of use, etc. For example, it can be designed as a tabletop type with a button that is pressed from above to spray and a nozzle that faces diagonally upward, or as a small, portable container.

[0036] The number, shape, and size of the nozzles of the pest control aerosol of the present invention are not particularly limited. For example, the number of nozzles may be one or two or more, but from the viewpoint of simple and low-cost production, the number of nozzles is preferably one. The shape (cross-sectional shape) of the nozzle may be circular, elliptical, polygonal, or various other irregular shapes. The opening area of ​​the nozzle is 0.05 to 8.0 mm 2 It is preferable that the thickness is 0.1 to 4.0 mm. 2 More preferably, it is 0.2 to 3.0 mm 2 For example, when there is one nozzle hole and the nozzle hole is circular, the nozzle hole size (orifice diameter) is preferably 0.3 mm or more, more preferably 0.4 mm or more, and even more preferably 0.6 mm or more. The nozzle hole diameter is preferably 3.0 mm or less, more preferably 2.0 mm or less, and even more preferably 1.8 mm or less.

[0037] The nozzle of the pest control aerosol of the present invention preferably has an elevation angle of 0 to 60° relative to the horizontal plane. If the elevation angle of the nozzle relative to the horizontal plane is within the above range, poor spraying is unlikely to occur and the aerosol concentrate can be stably sprayed. The elevation angle of the nozzle relative to the horizontal plane of a nozzle or actuator having two nozzles is the elevation angle relative to the horizontal plane of the perpendicular bisector of the line segment connecting the centers of each nozzle. For nozzles or actuators having three or more nozzles, the elevation angle of the nozzle relative to the horizontal plane is defined as follows: For nozzles or actuators having a nozzle in the center of the spray section, the elevation angle is the elevation angle relative to the horizontal plane of an orthogonal line passing through the center of the central nozzle. For nozzles or actuators having no nozzle in the center of the spray section, the elevation angle is the elevation angle relative to the horizontal plane of an orthogonal line passing through the center of the circumscribing circle of a polygon connecting the centers of each nozzle.

[0038] The nozzle of the pest control aerosol of the present invention is not particularly limited, but preferably has a nozzle that faces obliquely upward. Furthermore, the container of the pest control aerosol of the present invention is not particularly limited, but examples of its material include metals such as aluminum and tinplate, synthetic resins such as polyethylene terephthalate, and pressure-resistant glass. The shape of the container may be a normal cylindrical can or a modified can. When the container is made of synthetic resin or pressure-resistant glass, it may be translucent or transparent. Furthermore, the operation button of the pest control aerosol of the present invention is not particularly limited, but it may be a push-down type button or a trigger type button.

[0039] The pest control aerosol of the present invention is sprayed into the air in an indoor space, and the amount of the insecticidal component released into the air is 0.1 to 50 mg / m 3 It is preferable to set the concentration so that it is 0.5 to 50 mg / m 3 It is more preferable that the amount of the insecticidal component released into the air in an indoor space is set to 0.1 to 50 mg / m 3When the aerosol concentrate is sprayed so that the aerosol concentration is such that 50% or more of the insecticidal component by weight is dispersed and adheres to the entire floor surface of the indoor space within one hour after spraying, it is preferable that the insecticidal component be "dispersed and adhered to the entire floor surface of the indoor space" as long as the adhered insecticidal component is in a state where the floor surface can exert a pest control effect, and it is not necessary that the insecticidal component be physically adhered to the entire floor surface. By dispersing and adhering 50% or more of the insecticidal component by weight to the entire floor surface of the indoor space within one hour after spraying, the pest control aerosol of the present invention has a strong control effect against crawling pests that roam the floor surface, and has particularly excellent knockdown or lethal effects. Furthermore, the volume of the indoor space to be treated is not particularly limited, but it is preferable that the volume is 2.0 m or more. 3 Clearance less than 2.0~18.8m 3 The volume of a small space is 18.8 to 33.3 m, equivalent to a room of 4.5 to 8 tatami mats. 3 (Area 7.5~13.3m 2 , height 2.2-3.0m), and the volume of the indoor space is 33.3-66.6m, equivalent to a room of 8-16 tatami mats. 3 (Area 13.3~26.6m 2 , height 2.2 to 3.0 m), and spacious indoor spaces of 2.0 to 18.8 m 3 The volume of a small space is 18.8 to 33.3 m, equivalent to a room of 4.5 to 8 tatami mats. 3 (Area 7.5~13.3m 2 , height 2.2-3.0m) or a room of 8-16 tatami mats with a volume of 33.3-66.6m 3 (Area 13.3~26.6m 2 It is preferable that the indoor space is spacious (2.2 to 3.0 m high), with a volume of 18.8 to 33.3 m, equivalent to a room of 4.5 to 8 tatami mats. 3 (Area 7.5~13.3m 2 However, even in indoor spaces with larger or smaller volumes, the amount of insecticidal component released into the air in the indoor space should be 0.1 to 50 mg / m according to the volume of the indoor space. 3By appropriately setting the number of sprays, spray volume, etc. so that the same control effect can be obtained regardless of the volume of the indoor space, the frequency of use of the pest control aerosol of the present invention is preferably such that the amount of insecticidal component released is within the above-mentioned range at an appropriate time depending on the frequency and situation of pest occurrence.

[0040] The pest control aerosol of the present invention is effective against cockroaches such as American cockroaches, Smoky cockroaches, and German cockroaches; bedbugs such as bedbugs (cimex), Taiwanese bedbugs (Nettite cimex); stink bugs such as brown marmorated stink bugs; ants such as Japanese wood ants, sand ants, brown ants, house ants, red fire ants, and fire ants; spiders such as huntsman spiders, spotted house spiders, and redback spiders; millipedes; centipedes such as the Japanese stag beetle; pill bugs; woodlouses; Coptotermes formosanus; and Reticulitermes speratus. In addition to crawling pests such as termites and caterpillars, it can be used to control a variety of pests, including mosquitoes such as Culex pipiens, Aedes albopictus, Aedes aegypti and Culex pipiens; flies such as house flies and flesh flies; flying pests such as small flies, moths, chironomids, wasps and moths; clothing pests such as burrs moths and box moths; dermestid beetles such as bronchial beetles and dung beetles; grain storage pests such as maize weevils; and indoor dust mites such as flour mites, house dust mites, dust mites, chigger mites and Dermatophagoides pteronyssinus. It is particularly effective in controlling crawling pests such as cockroaches such as the American cockroach, the Smoky brown cockroach, and the German cockroach; bedbugs such as the Taiwanese bedbug (Nittic bedbug); ants such as the Japanese wood ant, the reticulated ant, the brown ant, the house ant, the red fire ant, and the fire ant; and spiders such as the huntsman spider, the spotted house spider, and the redback spider, and it exhibits excellent control effects against the German cockroach, the American cockroach, the Smoky brown cockroach, and bedbugs (bedbugs).

[0041] [Pest control method] In the pest control method of the present invention, various pests can be controlled by spraying the pest control aerosol thus obtained. Specifically, by spraying the pest control aerosol into the air in an indoor space at a single spray volume of 0.1 to 3.0 mL, preferably 0.2 to 1.0 mL, more preferably 0.2 to 0.9 mL, the amount of the pest control component released into the air is 0.1 to 50 mg / m 3 , preferably 0.5 to 50 mg / m 3 The volume of the indoor space to be treated is not particularly limited, but is set to 2.0 m 3 Clearance less than 2.0~18.8m 3 The volume of a small space is 18.8 to 33.3 m, equivalent to a room of 4.5 to 8 tatami mats. 3 (Area 7.5~13.3m 2 , height 2.2-3.0m), and the volume of the indoor space is 33.3-66.6m, equivalent to a room of 8-16 tatami mats. 3 (Area 13.3~26.6m 2 , height 2.2 to 3.0 m), and spacious indoor spaces of 2.0 to 18.8 m 3 The volume of a small space is 18.8 to 33.3 m, equivalent to a room of 4.5 to 8 tatami mats. 3 (Area 7.5~13.3m 2 , height 2.2-3.0m) or a room of 8-16 tatami mats with a volume of 33.3-66.6m 3 (Area 13.3~26.6m 2 It is preferable that the indoor space is spacious (2.2 to 3.0 m high), with a volume of 18.8 to 33.3 m, equivalent to a room of 4.5 to 8 tatami mats. 3 (Area 7.5~13.3m 2 For example, the volume equivalent to a room of 4.5 to 8 tatami mats is 18.8 to 33.3 m. 3 (Area 7.5~13.3m 2 When spraying indoors (at a height of 2.2 to 3.0 m), the amount of control ingredient released into the air is 0.1 to 50 mg / m by spraying the aerosol concentrate once or multiple times. 3However, even in indoor spaces with larger or smaller volumes, the amount of insecticidal component released into the air in the indoor space must be 0.1 to 50 mg / m according to the volume of the indoor space. 3 By appropriately setting the number of sprays, spray volume, etc. so that the same control effect can be obtained regardless of the volume of the indoor space, the frequency of application of the pest control method of the present invention is preferably at an appropriate time depending on the frequency and situation of pest occurrence so that the amount of insecticidal component released falls within the above range.

[0042] In the pest control method of the present invention, the aerosol is preferably sprayed at a spray direction angle of 0 to 60°, more preferably 30 to 60°, relative to the horizontal plane. If the spray direction angle of the aerosol is within the above range, excellent diffusion uniformity will be achieved. [Example]

[0043] To verify the effectiveness of the pest control aerosol of the present invention, pest control aerosols (Examples 1 to 18) having the characteristic features of the present invention were prepared, and tests were conducted as described in Test Example 1 to evaluate (1) the extermination effect against cockroaches, (2) the extermination effect against bedbugs, and (3) the floor adhesion rate and uniformity of diffusion of the insecticidal component. For comparison, pest control aerosols not having the characteristic features of the present invention (Comparative Examples 1 to 3) were prepared and similar tests were conducted. Furthermore, as described in Test Example 2, tests were conducted to evaluate (1) the extermination effect against other pests using pest control aerosols having the characteristic features of the present invention (Examples 1 and 9) and a pest control aerosol not having the characteristic features of the present invention (Comparative Example 3). The specific gravities (20°C) of the insecticidal components and solvents used in the examples and comparative examples are shown below. However, the present invention is not limited to these examples. Transfluthrin 1.51 Metofluthrin 1.28 Profluthrin 1.28 Fenothrin 1.06 Permethrin 1.20 Empenthrine 0.93 Ethanol 0.79 Isopropanol 0.79 Neothiosol 0.76 Isopropyl myristate 0.86 Phenylglycol 1.11

[0044] Example 1 The insecticidal component, transfluthrin (40 w / v%), was dissolved in ethanol as a solvent to prepare a stock aerosol solution. This stock aerosol solution had a specific gravity of 0.98 at 20°C and a viscosity of η at 10°C. 10 is 5.0 mPa·s, and the viscosity η at 30°C 30 is 4.0 mPa·s, and the ratio η 30 / η 10 is 0.80, and the specific gravity (p) and ratio η at 20°C 30 / η 10 Product of (p)·(q) with the square of (q) 2 The spray force was 0.63. 9 mL of aerosol concentrate (a) and 21 mL of liquefied petroleum gas (b) were pressurized and filled into an aerosol container (pressure-resistant container) with a metered spray valve and a spray capacity of 0.4 mL so that the volume ratio (a) / (a+b) of the aerosol concentrate (a) to the propellant liquefied petroleum gas (b) was 0.3, thereby obtaining the pest control aerosol of Example 1. This pest control aerosol had a spray force of 15 gf at a spray distance of 5 cm.

[0045] [Examples 2 to 18, Comparative Examples 1 to 3] Pest control aerosols of Examples 2 to 18 shown in Table 1 were prepared using a procedure similar to that of Example 1. For comparison, pest control aerosols of Comparative Examples 1 to 3 were also prepared. Note that for the pest control aerosols of Examples 2, 12 to 14, and 16, an aerosol container with a metered spray valve and a single spray volume of 1.0 mL was used; for the pest control aerosols of Examples 3 to 6, 8 to 11, 15, 17, and 18 and Comparative Examples 1 to 3, an aerosol container with a metered spray valve and a single spray volume of 0.4 mL was used; and for the pest control aerosol of Example 7, an aerosol container with a metered spray valve and a single spray volume of 0.2 mL was used.

[0046] [Table 1]

[0047] <Test Example 1> (1) Effectiveness against cockroaches A total of eight 20x20cm glass plates (for German cockroaches and American cockroaches) were enclosed to create a volume of 25m. 3 room (equivalent to a 6-tatami room, area 10m 2 The glass plates were placed at the four corners of a room, and a plastic ring approximately 20 cm in diameter coated with Vaseline to prevent escape was placed on each glass plate. A designated test insect (five German cockroach female adults and five American cockroach larvae) was released into each ring and allowed to roam freely. In Examples 1, 3-6, 8-11, 17, and 18, and Comparative Examples 1-3, 0.4 mL of the test aerosol was sprayed four times in the center of the room (1.5 m above the floor), changing the direction slightly diagonally upward. In Examples 2, 13, and 16, 1.0 mL of the test aerosol was sprayed one time in the center of the room (1.5 m above the floor), changing the direction slightly diagonally upward. In Example 7, 0.2 mL of the test aerosol was sprayed six times in the center of the room (1.5 m above the floor), changing the direction slightly diagonally upward. In Examples 12 and 14, 1.0 mL of the test aerosol was sprayed in four shots in the center of the room (1.5 m above the floor), changing the direction slightly diagonally upward. In Example 15, 0.4 mL of the test aerosol was sprayed in six shots in the center of the room (1.5 m above the floor), changing the direction slightly diagonally upward. The test insects were left to stand for 30 minutes after spraying to expose them to the agent, and the number of test insects that turned over over time was counted, and the KT 50 After 30 minutes had passed since spraying, the glass plate was moved to another room along with the ring containing the test insects, and food was given to them. After 24 hours, the mortality rate of the test insects was calculated. 50The values ​​were indicated as "A" if it was 8.0 minutes or less, "B" if it was 8.1 to 12.0 minutes, "C" if it was 12.1 to 30.0 minutes, and "D" if it was estimated to be 30.1 minutes or more. 50 Values ​​were indicated as "A" for 11.0 minutes or less, "B" for 11.1-18.0 minutes, "C" for 18.1-30.0 minutes, and "D" for estimated 30.1 minutes or more. Mortality rates for German cockroaches and American cockroaches were indicated as "A" for 90-100%, "B" for 75-85%, "C" for 50-70%, and "D" for less than 50%.

[0048] (2) Effectiveness against bedbugs A total of four 20x20cm glass panels are enclosed, with a volume of 25m 3 room (equivalent to a 6-tatami room, area 10m 2) were placed at the four corners of a room. A plastic ring approximately 10 cm in diameter coated with Vaseline to prevent escape was placed on each glass plate. Five bedbugs (medium-sized bedbugs) were released into each ring and allowed to roam freely. In Examples 1, 3-6, 8-11, 17, and 18, as well as Comparative Examples 1-3, 0.4 mL of the test aerosol was sprayed four times at a slight upward angle in the center of the room (1.5 m above the floor). In Examples 2, 13, and 16, 1.0 mL of the test aerosol was sprayed one time at a slight upward angle in the center of the room (1.5 m above the floor). In Example 7, 0.2 mL of the test aerosol was sprayed six times at a slight upward angle in the center of the room (1.5 m above the floor). In Examples 12 and 14, four shots of 1.0 mL of test aerosol were sprayed in the center of the room (1.5 m above the floor), with the direction slightly changing at an angle upward. In Example 15, six shots of 0.4 mL of test aerosol were sprayed in the center of the room (1.5 m above the floor), with the direction slightly changing at an angle upward. After 30 minutes of spraying, the test insects were exposed to the agent. The glass plate and the ring containing the test insects were then moved to another room, and the mortality rate of the test insects was determined after another 24 hours. In Table 2 below, the mortality rate of bed bugs is indicated by "A" if it was 90-100%, "B" if it was 75-85%, "C" if it was 50-70%, and "D" if it was less than 50%.

[0049] (3) The rate of insecticide adhesion to the floor and the uniformity of diffusion Volume 25m 3 room (equivalent to a 6-tatami room, area 10m 220 × 20 cm glass plates were placed at 6 to 8 locations on the floor of a room. In Examples 1, 3 to 6, 8 to 11, 17, and 18, and Comparative Examples 1 to 3, 0.4 mL of the test aerosol was sprayed in four shots at the center of the room (1.5 m above the floor), changing the direction slightly diagonally upward. In Examples 2, 13, and 16, 1.0 mL of the test aerosol was sprayed in one shot at a slightly diagonal upward direction toward the center of the room (1.5 m above the floor). In Example 7, 0.2 mL of the test aerosol was sprayed in six shots at the center of the room (1.5 m above the floor), changing the direction slightly diagonally upward. In Examples 12 and 14, 1.0 mL of the test aerosol was sprayed in four shots at the center of the room (1.5 m above the floor), changing the direction slightly diagonally upward. In Example 15, 0.4 mL of the test aerosol was sprayed six times at a slightly upward angle in the center of the room (1.5 m above the floor). One hour after spraying, all glass plates were removed, and the attached insecticidal components were washed with acetone and quantitatively analyzed by gas chromatography. Based on the analytical values ​​obtained, the ratio (floor adhesion rate) of the amount of insecticidal component that had settled and adhered to the floor surface within one hour of spraying (calculated as the total amount of insecticidal component attached to the glass plates × (room area) / (total area of ​​the glass plates)) to the theoretical total amount of insecticidal component sprayed (which corresponds to the amount of insecticidal component released multiplied by the volume in Table 1) was calculated. Furthermore, the variation in the amount of attached insecticidal component between each glass plate was analyzed to evaluate the uniformity of diffusion. The results were graded "A," "B," "C," and "D," in order of best to worst.

[0050] The test results are shown in Table 2.

[0051] [Table 2]

[0052] As a result of the test, the vapor pressure at 30°C was 1.5 x 10 -3 The pest control aerosols of Examples 1 to 18, which contain insecticidal ingredients with a suction pressure of less than mmHg, have a high lethal effect with a lethal rate of 80% or more against both cockroaches and bedbugs, and a KT50 It was confirmed that the knockdown effect was high, with the vapor pressure at 30°C being 1.0 x 10 -4 mmHg or more, 1.5 × 10 -3 The pest control aerosols of Examples 1 to 8, 11, 12, 14, 15, 17, and 18, which contain pyrethroid insecticidal components, have a viscosity of less than mmHg, were manufactured by KT 50 It was confirmed that the pest control aerosols of Examples 1 to 18, which used transfluthrin or metofluthrin, exhibited high knockdown effects, with the knockdown time being 8.0 minutes or less for German cockroaches and 12.0 minutes or less for American cockroaches. In particular, it was found that the pest control aerosols of Examples 1 to 7, 11, 12, 14, 15, 17, and 18, which used transfluthrin or metofluthrin, exhibited both excellent lethal effects and excellent knockdown effects against cockroaches. Furthermore, the test results confirmed that the pest control aerosols of Examples 1 to 18 not only had a floor adhesion rate of 50% or more of the insecticidal component one hour after spraying, but also that the insecticidal component was dispersed and adhered almost uniformly over the entire floor surface. The pest control aerosols of Examples 1 to 18 had a specific gravity of the aerosol concentrate at 20°C and a viscosity η at 30°C. 30 and viscosity η at 10°C 10 Ratio η 30 / η 10 Since the amount of the insecticide is appropriately adjusted, the insecticidal component is uniformly spread and adheres to the entire floor surface, and as a result, it is thought that the insecticidal component efficiently comes into contact with crawling pests at any position on the floor surface.

[0053] In contrast, the pest control aerosol of Comparative Example 1 had a ratio of η 30 / η 10 Since the ratio of the aerosol concentrate to the pest control aerosol of Comparative Example 2 was small, the adhesion of the insecticidal component to the floor surface was uneven, and sufficient lethal effect and knockdown effect against both cockroaches and bedbugs were not obtained. 30 / η 10In the pest control aerosol of Comparative Example 3, the specific gravity of the aerosol concentrate at 20°C and the ratio η 30 / η 10 is appropriately adjusted, but the vapor pressure of the insecticide, empenthrin, at 30°C is 1.5 × 10 -3 Because the pressure was above 1000mmHg, the amount of insecticidal ingredient attached to the floor surface was insufficient, and the state of attachment of the insecticidal ingredient to the floor surface was uneven, so it is thought that sufficient lethal effect and knockdown effect were not achieved.

[0054] <Test Example 2> Effective against other pests A total of 12 20x20cm glass plates (for theridiid spiders, black wood ants, and black cockroaches) are enclosed to create a volume of 25m 3 room (equivalent to a 6-tatami room, area 10m 2 ), and a plastic ring approximately 20 cm in diameter was placed on each glass plate. A designated test insect (one Theridiidae spider, five Japanese wood ants, and five adult female Siberian cockroaches) was released into each ring and allowed to roam freely. Four shots of the pest control aerosols of Examples 1 and 9 and Comparative Example 3 were sprayed in the center of the room (1.5 m above the floor), 0.4 mL each, with the direction slightly shifted upward. After 30 minutes of spraying, the test insects were exposed to the agent. The glass plates, together with the rings containing the test insects, were then moved to another room, where they were fed. The mortality rate of the test insects was determined after a further 24 hours.

[0055] The test results are shown in Table 3.

[0056] [Table 3]

[0057] As a result of the test, the pest control aerosols of Examples 1 and 9 exhibited excellent lethal effects against Theridiidae, Japanese wood ants, and Smoky cockroaches. In contrast, the pest control aerosol of Comparative Example 3 did not exhibit sufficient lethal effects against Theridiidae, Japanese wood ants, or Smoky cockroaches.

[0058] <Test Example 3> Effective against spiders A total of four 20x20cm glass plates (for the house spider) are enclosed, giving a volume of 25m 3 room (equivalent to a 6-tatami room, area 10m 2 ) were placed at the four corners of a room, and a plastic ring approximately 20 cm in diameter was placed on each glass plate. A designated test insect (Theridiidae: one spider) was released into each ring and allowed to roam freely. The pest control aerosol of Example 18 was sprayed four times in the center of the room (1.5 m above the floor), 0.4 mL of the test aerosol being sprayed at a slightly upward angle. After 30 minutes of spraying, the test insects were exposed to the agent. The glass plate and the ring containing the test insects were then moved to another room, where they were fed. After a further 24 hours, the mortality rate of the test insects was determined; the mortality rate was 100%.

[0059] <Test Example 4> Ant extermination effect A total of four 20x20cm glass plates (for black mountain ants) are enclosed, giving a volume of 25m 3 room (equivalent to a 6-tatami room, area 10m 2 ) were placed at the four corners of a room, and a plastic ring approximately 20 cm in diameter was placed on each glass plate. Five test insects (black wood ants) were released into each ring and allowed to roam freely. The pest control aerosol of Example 18 was sprayed four times in the center of the room (1.5 m above the floor), 0.4 mL of the test aerosol sprayed at a slightly upward angle. After 30 minutes of spraying, the test insects were exposed to the agent. The glass plates, along with the rings containing the test insects, were then moved to another room, where they were fed. After a further 24 hours, the mortality rate of the test insects was determined, which was 100%.

[0060] <Test Example 5> Effective against centipedes A total of four 20x20cm glass plates (for centipedes) are enclosed, giving a volume of 25m 3 room (equivalent to a 6-tatami room, area 10m 2 ) were placed at the four corners of a room, and a plastic ring approximately 20 cm in diameter was placed on each glass plate. A designated test insect (one centipede) was released into each ring and allowed to roam freely. The pest control aerosol of Example 18 was sprayed in four shots, 0.4 mL each, at a slightly upward angle in the center of the room (1.5 m above the floor). After spraying, the test insects were left to stand for 30 minutes to expose them to the agent, and then the glass plate and the rings containing the test insects were moved to another room. After a further 24 hours, the mortality rate of the test insects was determined, which was 100%.

[0061] <Test Example 6> Effective against centipedes A total of four 20x20cm glass plates (for centipedes) are enclosed, giving a volume of 25m 3 room (equivalent to a 6-tatami room, area 10m 2 ) were placed at the four corners of a room, and a plastic ring approximately 20 cm in diameter was placed on each glass plate. A designated test insect (one centipede) was released into each ring and allowed to roam freely. The pest control aerosol of Example 18 was sprayed in the center of the room (1.5 m above the floor) at a rate of 0.4 mL each, with the direction slightly shifted upward at an angle. After 30 minutes of spraying, the test insects were exposed to the agent, and then the glass plate and the ring containing the test insects were moved to another room. After a further 24 hours, the mortality rate of the test insects was determined, which was 100%.

[0062] <Test Example 7> Effective against stink bugs A total of four 20x20cm glass plates (for stink bugs) are enclosed, for a volume of 25m 3 room (equivalent to a 6-tatami room, area 10m 2) were placed at the four corners of a room, and a plastic ring approximately 20 cm in diameter was placed on each glass plate. A designated test insect (one stink bug) was released into each ring and allowed to roam freely. The pest control aerosol of Example 18 was sprayed four times in the center of the room (1.5 m above the floor), 0.4 mL of the test aerosol sprayed at a slightly upward angle. After 30 minutes of spraying, the test insects were exposed to the agent. The glass plate and the rings containing the test insects were then moved to another room, and the mortality rate of the test insects was determined after a further 24 hours; the mortality rate was found to be 100%.

[0063] <Test Example 8> Effective against woodlice A total of four 20x20cm glass plates (for woodlice) are enclosed, giving a volume of 25m 3 room (equivalent to a 6-tatami room, area 10m 2 ) were placed at the four corners of a room, and a plastic ring approximately 20 cm in diameter was placed on each glass plate. A designated test insect (single woodlice) was released into each ring and allowed to roam freely. The pest control aerosol of Example 18 was sprayed in the center of the room (1.5 m above the floor) at 0.4 mL doses, with the direction slightly shifted upward. After 30 minutes of spraying, the test insects were exposed to the agent. The glass plate and the ring containing the test insects were then moved to another room, and the mortality rate of the test insects was determined after a further 24 hours; the mortality rate was found to be 100%.

[0064] <Test Example 9> Effective against pill bugs A total of four 20 x 20 cm glass plates (for pillbugs) are enclosed, giving a volume of 25 m 3 room (equivalent to a 6-tatami room, area 10m 2) were placed at the four corners of a room, and a plastic ring approximately 20 cm in diameter was placed on each glass plate. A designated test insect (three pill bugs) was released into each ring and allowed to roam freely. The pest control aerosol of Example 18 was sprayed in the center of the room (1.5 m above the floor) at 0.4 mL doses, with the direction slightly shifted upward. After 30 minutes of spraying, the test insects were exposed to the agent. The glass plate and the rings containing the test insects were then moved to another room, and the mortality rate of the test insects was determined after a further 24 hours; the mortality rate was found to be 83%.

[0065] <Test Example 10> Effective against booklice A total of four 20 x 20 cm glass plates (for booklice) are enclosed, for a volume of 25 m 3 room (equivalent to a 6-tatami room, area 10m 2 ) were placed at the four corners of a room, and a plastic ring approximately 20 cm in diameter was placed on each glass plate. A designated test insect (3 psocids) was released into each ring and allowed to roam freely. The pest control aerosol of Example 18 was sprayed in the center of the room (1.5 m above the floor) at a rate of 0.4 mL each, with the direction slightly shifted upward. After 30 minutes of spraying, the test insects were exposed to the agent. The glass plate and the rings containing the test insects were then moved to another room, and the mortality rate of the test insects was determined after a further 24 hours; the mortality rate was found to be 100%.

[0066] <Test Example 11> Effective against cephalopods A total of four 20x20cm glass plates (for beetles) are enclosed, giving a volume of 25m 3 room (equivalent to a 6-tatami room, area 10m 2) were placed at the four corners of a room, and a plastic ring approximately 20 cm in diameter was placed on each glass plate. A designated test insect (three Lasioderma serricorne) was released into each ring and allowed to roam freely. The insect pest control aerosol of Example 18 was sprayed four times in the center of the room (1.5 m above the floor), 0.4 mL of the test aerosol sprayed at a slightly upward angle. After 30 minutes of spraying, the test insects were exposed to the agent. The glass plates, including the rings containing the test insects, were then moved to another room. After a further 24 hours, the mortality rate of the test insects was determined, which was 92%.

[0067] <Test Example 12> Effective against rice weevils A total of four 20 x 20 cm glass plates (for rice weevils) are enclosed, giving a volume of 25 m 3 room (equivalent to a 6-tatami room, area 10m 2 ) were placed at the four corners of a room, and a plastic ring approximately 20 cm in diameter was placed on each glass plate. A designated test insect (a single maize weevil) was released into each ring and allowed to roam freely. The pest control aerosol of Example 18 was sprayed four times in the center of the room (1.5 m above the floor), 0.4 mL of the test aerosol sprayed at a slightly upward angle. After 30 minutes of spraying, the test insects were exposed to the agent. The glass plates, along with the rings containing the test insects, were then moved to another room. After a further 24 hours, the mortality rate of the test insects was determined, which was 100%.

[0068] <Test Example 13> Efficacy against dermestid beetles A total of four 20 x 20 cm glass plates (for brontosa beetles) are enclosed, giving a volume of 25 m 3 room (equivalent to a 6-tatami room, area 10m 2) were placed at the four corners of a room, and a plastic ring approximately 20 cm in diameter was placed on each glass plate. A designated test insect (three dermestid beetles) was released into each ring and allowed to roam freely. The pest control aerosol of Example 18 was sprayed four times in the center of the room (1.5 m above the floor), 0.4 mL of the test aerosol sprayed at a slightly upward angle. After 30 minutes of spraying, the test insects were exposed to the agent. The glass plates, including the rings containing the test insects, were then moved to another room. After a further 24 hours, the mortality rate of the test insects was determined, which was 83%.

[0069] <Test Example 14> Effective against moths Volume 25m 3 In this room, the pest control aerosol of Example 18 was sprayed four times, 0.4 mL at a time, at a slightly upward angle in the center of the room (1.5 m above the floor). Four moths were immediately released and exposed to the agent for two hours, after which all test insects were collected. The mortality rate of the test insects was determined 24 hours later, and was found to be 100%.

[0070] <Test Example 15> Mosquito repellent effect Volume 25m 3 In this room, the pest control aerosol of Example 1 was sprayed in the center of the room (1.5 m above the floor) at a slightly upward angle, with 0.4 mL of the test aerosol spray applied, four times. Immediately, 50 adult male Culex pipiens mosquitoes were released and exposed to the agent for 2 hours, after which the test insects were collected. The mortality rate of the test insects was determined 24 hours later, and was found to be 100%. [Industrial Applicability]

[0071] The pest control aerosol and pest control method of the present invention can be used for the purpose of controlling indoor pests, particularly crawling pests such as cockroaches and bedbugs.

Claims

1. Vapor pressure at 30°C is 1.5 x 10 －３ An aerosol for pest control, which is used for spraying indoors into a space, comprises an aerosol concentrate containing an insecticidal component and a solvent, the concentration of which is less than mmHg, and a propellant, and which is filled into an aerosol container equipped with a metered injection valve, The target of control is cockroaches, The insecticidal component contains only transfluthrin and / or metofluthrin, The content of the insecticidal component in the aerosol concentrate is 8 to 80 w / v %, The aerosol concentrate has a specific gravity of 0.82 to 1.25 at 20°C and a viscosity η １０ is 3.2 to 60.0 mPa·s, and the viscosity η at 30°C is ３０ and viscosity η at 10 ° C. １０ Ratio η ３０ / η １０ is 0.40 to 0.92, The metered injection valve has a single injection volume of 0.1 to 3.0 mL, The amount of the insecticidal component released into the air in an indoor space is 0.1 to 50 mg / m ３ When the aerosol concentrate is sprayed so as to achieve the above formula, 50% or more of the insecticidal component per spray will be dispersed and adhered to the entire floor surface of the indoor space within one hour after spraying.

2. The specific gravity of the aerosol concentrate at 20°C is p, and the ratio η ３０ / η １０ When q is taken as (p)·(q) ２ The pest control aerosol according to claim 1, wherein the viscosity is 0.17 to 1.

00.

3. 3. The pest control aerosol according to claim 1, wherein the cockroaches are American cockroaches.

4. Vapor pressure at 30°C is 1.5 x 10 －３ A pest control method for spraying a pest control aerosol prepared by filling an aerosol concentrate containing an insecticidal component and a solvent, and a propellant, into an aerosol container equipped with a metered injection valve, the method comprising: The target of control is cockroaches, The insecticidal component contains only transfluthrin and / or metofluthrin, The content of the insecticidal component in the aerosol concentrate is 8 to 80 w / v %, The aerosol concentrate has a specific gravity of 0.82 to 1.25 at 20°C and a viscosity η １０ is 3.2 to 60.0 mPa·s, and the viscosity η at 30°C is ３０ and viscosity η at 10 ° C. １０ Ratio η ３０ / η １０ is 0.40 to 0.92, The metered injection valve has a single injection volume of 0.1 to 3.0 mL, The amount of the insecticidal component released into the air in an indoor space is 0.1 to 50 mg / m ３ This pest control method sprays the pest control aerosol into a space indoors so that when the aerosol concentrate is sprayed so as to obtain the above amount, 50% or more of the insecticidal component per spray will be dispersed and adhered to the entire floor surface of the indoor space by weight within one hour after spraying.

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