Quantitative injection aerosol product for pest control

Abstract

To provide a quantitative injection aerosol product for pest control which can suppress feeling of stimulation felt by persons and pet animals, while exhibiting excellent control effect against pests in a narrow space, especially, mosquitoes.SOLUTION: There is provided a quantitative injection aerosol product for pest control for controlling pests in a narrow space having capacity of 2.0 to 18.8 m3 in which an aerosol container including a quantitative injection valve having injection capacity per one time of 0.08 to 2.0 mL is filled with an aerosol stock solution containing a pest control component and an organic solvent, and a propellant, wherein specific gravity of the aerosol stock solution is 0.76 to 0.95, a capacity ratio (a / b) of the aerosol stock solution (a) to the propellant (b) in the aerosol container is a / b≤50 / 50 in mass ratio, and an inner pressure is set at 0.20 to 0.60 MPa at 25°C.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention is applicable to vehicles with a volume of 2.0 to 18.8 m 3 The present invention relates to a pest control aerosol product for spraying a fixed amount of pests in a narrow space, and a pest control method using the same. [Background technology]

[0002] Aerosol products that can easily spray pest control ingredients into a treatment space are used for various purposes as pest control products. For example, products for controlling flying pests that invade indoor spaces such as houses (see, for example, Patent Document 1) and products for treating dog and cat breeding kennels (see, for example, Patent Document 2) are known.

[0003] The aerosol product in Patent Document 1 has an airborne residual rate of the treatment agent in the treatment space adjusted to 15% or more one hour after the start of treatment, or 5% or more two hours after the start of treatment. According to Patent Document 1, after the agent is released, it remains in the air, preventing a decrease in the airborne concentration, thereby maintaining a sufficient extermination effect against mosquitoes hiding in the shadows.

[0004] The aerosol product of Patent Document 2 is installed at the entrance of the animal shed and sprays the entire amount of its contents. According to Patent Document 2, when this aerosol product is sprayed toward the animal shed, it is easy to dispose of and is safe as the user is not exposed to the chemicals. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-17055 [Patent Document 2] Japanese Patent Application Laid-Open No. 2001-238586 Summary of the Invention [Problem to be solved by the invention]

[0006] The aerosol product of Patent Document 1 attempts to lengthen the time the drug remains in the air by adjusting the particle size of the drug that diffuses indoors in a house, etc. However, the aerosol product of Patent Document 1 is intended for use in an 8-tatami room, and it cannot necessarily be said that the formulation design is suitable for use in small spaces such as tents or automobiles.

[0007] The aerosol product of Patent Document 2 requires the use of a total-amount spray aerosol device, which requires time-consuming preparation before use, and is therefore not a formulation that can be easily and frequently adopted. In particular, the use of a total-amount spray aerosol device is intended for treating livestock sheds where there are no dogs, cats, etc., and in small spaces where people and pets stay, such as tents or cars, there is a higher risk of people or pets inhaling the chemical and there is a risk of the irritation becoming stronger. Furthermore, the aerosol product of Patent Document 2 is designed to target fleas and ticks, which are blood-sucking pests of dogs, cats, etc., and is not necessarily suitable for the purpose of exterminating flying pests such as mosquitoes.

[0008] Thus, there is a need for the development of an aerosol product that can reduce the irritation that can be a concern when used in small spaces where people and pets are present, and that can also exert a sufficient control effect against pests, particularly mosquitoes; however, none of these has yet been put to practical use.

[0009] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a pest control aerosol product for metered-dose spraying that can exert an excellent control effect against pests, particularly mosquitoes, in small spaces while reducing the irritation felt by people and pets, and a pest control method using the same. [Means for solving the problem]

[0010] The characteristic configuration of the pest control metered-quantity aerosol product according to the present invention for solving the above problems is as follows: Volume is 2.0 to 18.8 m3 A pest control metered-quantity aerosol product for controlling pests in a narrow space, The aerosol concentrate containing the pest control component and the organic solvent and the propellant are filled in an aerosol container equipped with a metered injection valve with a single injection volume of 0.08 to 2.0 mL, The specific gravity of the aerosol concentrate is 0.76 to 0.95, In the aerosol container, the volume ratio (a / b) of the aerosol concentrate (a) to the propellant (b) is set to a / b ≦ 50 / 50 by volume, and the internal pressure is set to 0.20 to 0.60 MPa at 25°C.

[0011] The pest control metered dose aerosol product of this configuration is prepared by filling an aerosol concentrate containing a pest control ingredient and an organic solvent, and a propellant, into an aerosol container equipped with a metered dose valve with a single spray volume of 0.08 to 2.0 mL. Since the specific gravity, volume ratio (a / b), and internal pressure at 25°C of the aerosol concentrate are within the above ranges, the volume can be increased to 2.0 to 18.8 m. 3 When sprayed in a small space, the sprayed particles adhere to the wall surface without remaining in the air in excess. Pests, particularly mosquitoes, spend more time perched on walls and waiting for an opportunity to suck blood than they do flying, so the sprayed particles adhering to the wall surface can provide excellent mosquito control effects in small spaces. On the other hand, because the sprayed particles do not remain in the air in excess even in small spaces, the irritation felt by people and pets, which is a concern when using in small spaces, is reduced.

[0012] In the pest control metered dose aerosol product according to the present invention, The spray amount of the control component is 2.0 to 18.8 m 3 It is preferable that the amount is set to 0.2 to 20.0 mg per unit area.

[0013] According to the pest control metered dose aerosol product of this configuration, the spray amount of the control component is 2.0 to 18.8 m 3By setting the concentration to 0.2 to 20.0 mg per unit area, when the aerosol is sprayed in a small space, it is possible to obtain an appropriate control effect against pests, particularly mosquitoes, while reducing the irritation felt by people and pets.

[0014] In the pest control metered dose aerosol product according to the present invention, The content of the control component in the aerosol concentrate is preferably 0.2 to 25.0 w / v %.

[0015] According to this configuration of a metered-dose aerosol product for pest control, the content of the control component in the aerosol concentrate is 0.2 to 25.0 w / v%, so when the aerosol is sprayed in a small space, it is possible to obtain an appropriate control effect against pests, particularly mosquitoes, while reducing the irritation felt by people and pets.

[0016] In the pest control metered dose aerosol product according to the present invention, The organic solvent is preferably a lower alcohol having 2 to 3 carbon atoms.

[0017] According to the pest control metered dose aerosol product of this configuration, the organic solvent is a lower alcohol having 2 to 3 carbon atoms, which can prevent stickiness and dirt from occurring on the surface to which the spray particles adhere in a narrow space.

[0018] In the pest control metered dose aerosol product according to the present invention, The control ingredient has a vapor pressure of 2×10 at 30°C. -4 ~1×10 -2 It is preferable that the pyrethroid compound contains a viscoelasticity of 10 ...

[0019] In the pest control metered-quantity spray aerosol product of this configuration, the vapor pressure of the pest control ingredient at 30°C is 2 x 10 -4 ~1×10 -2By containing a pyrethroid compound with a viscosity of mmHg, the control ingredient is easily vaporized in small spaces where people and pets stay, which are usually kept at room temperature, and it is possible to achieve excellent control effects against pests, especially mosquitoes.

[0020] In the pest control metered dose aerosol product according to the present invention, The pyrethroid compound is preferably at least one selected from the group consisting of transfluthrin, metofluthrin, and profluthrin.

[0021] According to the pest control metered-dose aerosol product of this configuration, since the pyrethroid compound is the above-mentioned appropriate compound, it can exert a more excellent control effect against pests, particularly mosquitoes, in narrow spaces.

[0022] In the pest control metered dose aerosol product according to the present invention, The spray force at a spray distance of 15 cm is preferably set to 3.0 to 20.0 gf.

[0023] With this type of pest control metered dose aerosol product, by setting the spray force at a spray distance of 15 cm to 3.0 to 20.0 gf, when sprayed in a small space, the spray particles reach the wall surface, providing a practically sufficient control effect against pests, particularly mosquitoes, and also reducing the irritation felt by people and pets.

[0024] The characteristic configuration of the pest control method according to the present invention for solving the above problems is as follows: A method for controlling pests using the above-mentioned metered dose aerosol product for pest control, The pest control metered-quantity spray aerosol product has a volume of 2.0 to 18.8 m 3 The purpose of this is to spray in a small space.

[0025] According to the pest control method of this configuration, the above-mentioned pest control metered-quantity spray aerosol product is sprayed in a volume of 2.0 to 18.8 m 3By spraying the sprayed particles in a small space, the sprayed particles can be attached to the wall surface without remaining in the air in excess. Since pests, particularly mosquitoes, spend more time perched on walls and waiting for an opportunity to suck blood than they do flying, the sprayed particles attached to the wall surface can provide excellent mosquito control effects in small spaces. Meanwhile, because the sprayed particles do not remain in the air in excess, the irritation felt by people and pets, which is a concern when using the sprayed particles in small spaces, can be reduced.

[0026] In the pest control method according to the present invention, It is preferable to spray the liquid so that the spray direction angle is 30 to 60° with respect to the horizontal plane.

[0027] According to the pest control method of this configuration, the spray direction angle is set to 30 to 60° with respect to the horizontal plane, thereby improving the uniformity of diffusion. DETAILED DESCRIPTION OF THE INVENTION

[0028] The pest control metered dose aerosol product 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.

[0029] [Fixed-dose aerosol product for pest control] The pest control metered-dose aerosol product of the present invention is a metered-dose aerosol used to control pests, particularly mosquitoes, in narrow spaces, and is configured by filling an aerosol concentrate containing a control ingredient and a solvent, as well as a propellant, in an aerosol container equipped with a metered-dose valve. Here, the "narrow space" in the present invention is defined as a space having a volume of 2.0 to 18.8 m. 3 The intended space is a space of about 2.0 to 4.0 m3, and examples of such spaces include enclosed or semi-enclosed spaces such as automobiles, tents, toilets, warehouses, storage sheds, garages, washrooms, and entrances. More specifically, the intended space is a space with a volume of 2.0 to 4.0 m3. 3 Examples of small spaces include the interior of a light vehicle or compact car, with a volume of 4.0 to 18.8 m.3 An example of such a small space is a small room of 1 to 4.5 tatami mats. The pest control metered-dose aerosol product of the present invention is a metered-dose aerosol, so the amount of agent sprayed is small. Furthermore, by appropriately setting the specific gravity of the aerosol concentrate, the volume ratio of the aerosol concentrate to the propellant in the aerosol container, and the internal pressure of the aerosol container at 25°C, it is possible to achieve pest control effects in small spaces and reduce the irritation felt by people and pets. 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.

[0030] <Concentrated aerosol> The control component, which is one of the main components of the aerosol concentrate, contains pyrethroid compounds such as metofluthrin, profluthrin, transfluthrin, empenthrin, telallethrin, furamethrin, fenothrin, cyphenothrin, permethrin, cyfluthrin, imiprothrin, bifenthrin, fenpropathrin, tralomethrin, and etofenprox, and in particular, has a vapor pressure of 2×10 at 30°C. -4 ~1×10 -2 It is preferable that the compound contains a room-temperature volatile pyrethroid compound having a viscosity of mmHg. Examples of room-temperature volatile pyrethroid compounds include metofluthrin, profluthrin, transfluthrin, empenthrin, telallethrin, and furametrin. Among these, metofluthrin, profluthrin, and transfluthrin are preferred in consideration of volatility (vapor pressure), stability, basic insecticidal efficacy, and the like. The above pyrethroid compounds can be used alone or in combination of two or more types. Note that, when optical isomers based on asymmetric carbons or geometric isomers based on double bonds exist in the acid moiety or alcohol moiety of the pyrethroid compound, each of these isomers and any mixture thereof are also encompassed in the present invention.

[0031] In addition to the pyrethroid compounds described above, other insecticidal compounds may be added as appropriate as the control component, including, for example, organosilicon compounds such as silafluofen, neonicotinoid compounds such as dinotefuran, imidacloprid, and clothianidin, and carbamate compounds such as propoxur.

[0032] From the viewpoint of reducing irritation to humans and pets when used in a small space, the content of the pest control ingredient in the aerosol concentrate is preferably 0.2 to 25.0 w / v%, more preferably 0.4 to 12.5 w / v%, and even more preferably 0.5 to 5.0 w / v%. If the content of the pest control ingredient in the aerosol concentrate is within the above range, when the aerosol is sprayed in a small space, it is possible to obtain an appropriate pest control effect against pests, particularly mosquitoes, while reducing irritation to humans and pets.

[0033] Examples of organic solvents, which are one of the main components of aerosol concentrates, include lower alcohols with 2 to 3 carbon atoms, such as ethanol and isopropanol (IPA), hydrocarbon solvents such as normal paraffin and isoparaffin, higher fatty acid esters with 16 to 20 carbon atoms, such as isopropyl myristate (IPM), glycol ether solvents with 3 to 10 carbon atoms, and ketone solvents. Among these, lower alcohols with 2 to 3 carbon atoms are preferred because they ensure uniform dispersion of spray particles and are less likely to cause stickiness or staining on floors or walls to which the spray particles adhere. The above organic solvents can be used alone or in combination, but it is preferable to use only one type of organic solvent to simplify the manufacturing process. It is also possible to mix an aqueous solvent, such as water, with the organic solvent.

[0034] The specific gravity of the aerosol concentrate is set to 0.76 to 0.95, preferably 0.76 to 0.85, and more preferably 0.76 to 0.82. The specific gravity of the aerosol concentrate is an important factor affecting the settling of sprayed particles, and if the specific gravity of the aerosol concentrate is within the above range, the sprayed particles can be properly attached to the wall surface after spraying in a narrow space. Pests, particularly mosquitoes, spend more time perched on walls and waiting for an opportunity to suck blood than they do flying, so by attaching sprayed particles containing a control ingredient to the wall surface, mosquitoes can be adequately controlled in a narrow space.

[0035] In addition to the above ingredients, the aerosol concentrate may also contain repellents, miticides, antifungal agents for fungi and mold, antibacterial agents, disinfectants, antiviral agents, fragrances, deodorizers, stabilizers, antistatic agents, antifoaming agents, and excipients. Repellents include DEET, ethyl butylacetylaminopropionate (IR3535), and icaridin. Miticides include methyl 5-chloro-2-trifluoromethanesulfonamidobenzoate, 3-iodo-2-propynyl butylcarbamate, amidoflumet, benzyl benzoate, phenyl salicylate, benzyl salicylate, butyl adipate, diethyl phthalate, and dibutyl phthalate. Antifungal, antibacterial, disinfectant, and antiviral agents 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 fragrances include aromatic components such as orange oil, lemon oil, lavender oil, peppermint oil, eucalyptus oil, lemon eucalyptus oil, citronella oil, lime oil, yuzu oil, jasmine oil, cypress oil, green tea essential oil, peppermint oil, menthol, p-menthane-3,8-diol, menthyl acetate, limonene, α-pinene, linalool, geraniol, phenylethyl alcohol, amyl cinnamic aldehyde, cumin aldehyde, and benzyl acetate, as well as fragrance components containing leaf alcohol or leaf aldehyde, known as the "scent of greenery."

[0036] The pest control metered-dose aerosol product of the present invention can also be formulated as a water-based formulation. In this case, the amount of water contained in the aerosol concentrate is preferably 5 to 50 v / v %, and a small amount of a nonionic surfactant may be added as a solubilizing aid, as long as it does not affect the spray pattern of the spray particles. Examples of nonionic surfactants include ethers such as polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, and polyoxyethylene alkylamino ethers; fatty acid esters such as polyethylene glycol fatty acid esters, polyoxyethylene sorbitan fatty acid esters, and polyoxyethylene glycerin fatty acid esters; polyoxyethylene styrenated phenol; and polyalkalolamides of fatty acids.

[0037] <Propellant> Propellants used in the pest control metered-dose aerosol product of the present invention include liquefied gases such as liquefied petroleum gas (LPG), dimethyl ether (DME), and hydrofluoroolefins, as well as compressed gases such as nitrogen gas, carbon dioxide gas, nitrous oxide, and compressed air. The above propellants can be used alone or in a mixture, but those containing LPG as the main component are usually the easiest to use.

[0038] The pest control metered-dose aerosol product of the present invention comprises an aerosol concentrate containing a pest control ingredient and an organic solvent, and a propellant, filled in an aerosol container. The volume ratio (a / b) of the aerosol concentrate (a) to the propellant (b) in the aerosol container is set to a volume ratio of a / b ≦ 50 / 50 (0 < a / b). The volume ratio (a / b) is preferably set to 1 / 99 ≦ a / b ≦ 50 / 50, more preferably 5 / 95 ≦ a / b ≦ 50 / 50. When the volume ratio (a / b) is within the above range, when sprayed in a narrow space, the sprayed particles adhere to the wall surface without excessively remaining in the air, allowing a sufficient amount of the pest control ingredient to adhere to the wall surface. This allows for appropriate pest control effects against pests, particularly mosquitoes, while reducing irritation to humans and pets.

[0039] The pest control metered dose aerosol product of the present invention has an internal pressure of the aerosol container set to 0.20 to 0.60 MPa at 25°C, preferably 0.30 to 0.50 MPa. When the internal pressure is within the above range at 25°C, a sufficient amount of the control component can be adhered to the wall surface when sprayed in a narrow space. If the internal pressure is less than 0.20 MPa, the spray particles tend to settle before reaching the wall surface after spraying, resulting in insufficient adhesion of the control component to the wall surface, which may result in insufficient pest control. If the internal pressure exceeds 0.60 MPa, the spray force may be too strong, causing some of the spray particles to rebound upon reaching the wall surface, potentially causing a strong irritation to people or pets when the aerosol is sprayed in a narrow space. The internal pressure of such aerosol products can be appropriately adjusted depending on the type of propellant, the vapor pressure of the propellant, and other factors. The aerosol container may be a pressure-resistant container that can withstand an internal pressure of 0.20 to 0.60 MPa, and may be made of, for example, metal such as aluminum or tinplate, synthetic resin such as polyethylene terephthalate, pressure-resistant glass, etc. Furthermore, when the aerosol container is made of synthetic resin, it may be translucent or transparent.

[0040] The pest control metered dose aerosol product of the present invention preferably has a spray force set to 3.0 to 20.0 gf, more preferably 3.0 to 15.0 gf, at a distance of 15 cm from the nozzle. If the spray force is within the above range, when sprayed in a narrow space, the sprayed particles will reach the wall surface, providing a practically sufficient control effect against pests, particularly mosquitoes, and reducing irritation to people and pets.

[0041] The pest control metered dose aerosol product of the present invention is equipped with a metered dose valve for spraying a fixed amount in a narrow space, and the metered dose valve's per-spray volume is set to 0.08 to 2.0 mL, preferably 0.08 to 1.0 mL, more preferably 0.08 to 0.4 mL, and even more preferably 0.08 to 0.2 mL. When the per-spray volume is within the above range, practically sufficient pest control effect against pests, particularly mosquitoes, can be achieved when sprayed in a narrow space, and irritation to humans and pets can be reduced. If the per-spray volume is less than 0.08 mL, there is a risk that pests will not be sufficiently controlled in a narrow space. If the per-spray volume is more than 2.0 mL, there is a risk that the aerosol will cause a strong irritation to humans and pets when sprayed in a narrow space.

[0042] In the pest control metered dose aerosol product of the present invention, the nozzle diameter of the spray element attached to the metered dose valve is preferably 0.2 to 1.0 mm. A nozzle diameter of 0.2 to 1.0 mm allows the spray force to be adjusted within an appropriate range. The shape (cross-sectional shape) of the nozzle is not particularly limited, but examples include circle, polygons such as squares, and ellipses, with circle being preferred. Here, the nozzle diameter refers to the major axis of the ellipse when the nozzle shape is elliptical, and refers to the diameter of the circumscribed circle of the polygon when the nozzle shape is polygonal.

[0043] The nozzle of the pest control metered dose aerosol product of the present invention has an elevation angle of the nozzle relative to the horizontal plane that is usually set to 0 to 60°, preferably 10 to 60°, and more preferably 15 to 50°. 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 sprayed stably.

[0044] The pest control metered spray aerosol product of the present invention has a spray amount of the control component in a volume of 2.0 to 18.8 m 3 The amount of the pest control component sprayed is preferably set to 0.2 to 20.0 mg, more preferably set to 0.3 to 10.0 mg, and even more preferably set to 0.4 to 8.0 mg per 1000 m2. If the amount of the pest control component sprayed is within the above range, the volume of the pest control component is preferably set to 2.0 to 18.8 m2. 3 The pest control effect against mosquitoes is adequately exerted in a small space, and it is possible to reliably knock down or kill mosquitoes while reducing the irritation felt by people and pets. The pest control metered spray aerosol product of the present invention is preferably designed so that the amount of the control component sprayed per spray is 0.2 to 20.0 mg, more preferably 0.3 to 10 mg. In this case, the volume per spray is 2.0 to 18.8 m. 3 Furthermore, the pest control metered-volume aerosol product of the present invention can treat small spaces with a volume of 2.0 to 18.8 m3 through multiple sprays. 3 The amount of the control component sprayed per spray may be set so that the amount of the control component sprayed per spray is 0.2 to 20.0 mg, preferably 0.3 to 10.0 mg. Such an amount of the control component sprayed can be achieved by appropriately adjusting the composition of the aerosol concentrate, the volume ratio (a / b) of the aerosol concentrate (a) to the propellant (b), the spray volume per spray of the metered spray valve, and the like, each within the above-mentioned ranges.

[0045] The pest control metered dose aerosol product according to the present invention can create an atmosphere in a small space that allows pests to be controlled for approximately 3 to 24 hours with a single application.

[0046] <Pests to be controlled> The metered-quantity aerosol product for controlling pests of the present invention can be used to control 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 sand squirrel; pill bugs; woodlouse; termites; and Japanese white ants. 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 gnats, moths, chironomids, wasps and moths; clothing pests such as burrs moths and Japanese box moths; dermestid beetles such as dermestid beetles and small dermestid 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. In particular, it is effective for controlling flying pests such as mosquitoes such as Culex pipiens, Aedes albopictus, Aedes aegypti, and Culex pipiens, flies such as house flies and flesh flies, small flies, moths, chironomids, wasps, and moths, and it exhibits excellent control effects against mosquitoes such as Culex pipiens, Aedes albopictus, Aedes aegypti, and Culex pipiens.

[0047] [Pest control method] The pest control method of the present invention comprises dissolving the above-mentioned pest control metered-amount aerosol product in a volume of 2.0 to 18.8 m 3 In the pest control method of the present invention, by using the pest control metered dose aerosol product described above, it is possible to exert an excellent control effect against pests, particularly mosquitoes, in narrow spaces while reducing the irritation felt by people and pets, which may be a concern when the product is used in narrow spaces. In the pest control method of the present invention, when the pest control metered dose aerosol product is sprayed in a narrow space, the spray amount of the control component is set to a volume of 2.0 to 18.8 m. 3The amount of the control component sprayed is preferably adjusted to 0.2 to 20.0 mg per spray, more preferably 0.3 to 10.0 mg, and even more preferably 0.4 to 8.0 mg per spray. When the amount of the control component sprayed is within the above range, when the aerosol is sprayed in a small space, it is possible to obtain an appropriate control effect against pests, particularly mosquitoes, while reducing the irritation felt by people and pets.

[0048] 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]

[0049] To verify the effectiveness of the pest control metered dose aerosol product of the present invention, pest control metered dose aerosol products (Examples 1 to 17) equipped with the characteristic features of the present invention were prepared, and tests were conducted to evaluate (1) the wall adhesion of the control ingredient, (2) the irritation sensation, and (3) the effect on fabric. For comparison, pest control metered dose aerosol products (Comparative Examples 1 to 6) not equipped with the characteristic features of the present invention were prepared and similar tests were conducted. Furthermore, using the pest control metered dose aerosol product of Example 1, a test was conducted to evaluate (4) its use in tents. In the following examples and comparative examples, the spray force of the pest control metered dose aerosol was measured using a digital force gauge (FGC-0.5, manufactured by Nidec-Shimpo Corporation).

[0050] Example 1 An aerosol concentrate was prepared by dissolving the pest control ingredient, transfluthrin (2.0 w / v%), in ethanol, an organic solvent. The specific gravity of this aerosol concentrate was 0.80. 9 mL of the aerosol concentrate (a) and 21 mL of liquefied petroleum gas (b) as a propellant were pressurized and filled into an aerosol container (pressure-resistant container) with a metered spray valve and a spray volume of 0.2 mL, so that the volume ratio (a / b) was 30 / 70, to obtain the pest control metered spray aerosol product of Example 1. This pest control metered spray aerosol product had an internal pressure of 0.45 MPa at 25°C and sprayed 1.2 mg of the pest control ingredient per spray. The spray force at a spray distance of 15 cm was 8.0 gf.

[0051] Comparative Example 1 The control ingredient transfluthrin (2.0 w / v%) was dissolved in ethanol, an organic solvent, to prepare 30 mL of aerosol concentrate. This aerosol concentrate had a specific gravity of 0.80. This aerosol concentrate was placed in a container equipped with a pump spray head with a single spray volume of approximately 0.2 mL, to obtain a pump spray product for pest control of Comparative Example 1. This pump spray product for pest control sprayed 1.2 mg of the control ingredient per spray. The spray force at a spray distance of 15 cm was 2.0 gf.

[0052] [Examples 2 to 17, Comparative Examples 2 to 6] Various pest control metered dose aerosol products shown in Table 1 were prepared using procedures similar to those of Example 1. Note that for the pest control metered dose aerosol products of Examples 2 to 5, 7 to 12, and 15 to 17 and Comparative Examples 2 to 4 and 6, an aerosol container with a metered dose valve and a single spray volume of 0.2 mL was used; for the pest control metered dose aerosol products of Examples 6 and 13, an aerosol container with a metered dose valve and a single spray volume of 0.4 mL was used; for the pest control metered dose aerosol product of Example 14, an aerosol container with a metered dose valve and a single spray volume of 1.0 mL was used; and for the pest control metered dose aerosol product of Comparative Example 5, an aerosol container with a metered dose valve and a single spray volume of 2.2 mL was used.

[0053] [Table 1]

[0054] Tests were conducted to evaluate (1) the wall adhesion of the pest control ingredient, (2) irritation, and (3) the effect on fabric for Examples 1 to 17 and Comparative Examples 1 to 6. The test results are shown in Table 2.

[0055] (1) Adhesion of the control ingredient to the wall Closed volume: 4.2m 3 A small room (1.8 m wide, 1.3 m deep, 1.8 m high) was fitted with 20 cm x 20 cm glass plates at six locations on the floor and nine locations on the walls. Standing in one of the four corners of the room, the test aerosol product was sprayed once from a height of 1 m above the floor, at a slight upward angle toward the center of the room. Twenty minutes after spraying, the glass plates on the floor and the walls were removed, and the adhering control ingredients were washed with acetone and analyzed by gas chromatography. Based on the analytical values ​​obtained, the ratio of the amount of control ingredient adhering to the wall relative to the amount adhering to the floor within 20 minutes of spraying was calculated to evaluate wall adhesion. The results were ranked on a three-point scale (A, B, C) in order of best to worst wall adhesion.

[0056] (2) Stimulation sensation Closed volume: 4.2m 3 The subjects stood in one of the four corners of a small room (1.8m wide, 1.3m deep, 1.8m high) and sprayed the test aerosol product once from a height of 1m above the floor, slightly diagonally upwards towards the centre of the room. After spraying, the subjects remained in the room for 10 minutes and then evaluated the sensation of irritation based on the following criteria. (Evaluation criteria) A: I didn't feel any irritation at all. B: I hardly felt any irritation. C: I felt a sense of stimulation.

[0057] (3) Effects on fabric In small spaces such as automobiles and tents where textile products such as seat covers and futons are installed, it is desirable that the product not only be less irritating, but also have minimal effects such as staining and dirt on the textile products. Therefore, the following tests were conducted to simulate the effects on seat covers and futons inside automobiles and tents. Closed volume: 4.2 m 3 A 5cm x 5cm polyester cloth was placed in the center of the floor of a small room (1.8m wide, 1.3m deep, 1.8m high). Standing in one of the four corners of the room, the test aerosol product was sprayed once from a height of 1m above the floor, at a slight angle upwards towards the center of the space. 20 minutes after spraying, the cloth was removed and the degree of liquid staining (contamination) and stickiness was evaluated based on the following evaluation criteria. (Evaluation criteria) A: No liquid stains (contamination) or stickiness occurred. B: Almost no liquid stains (contamination) or stickiness occurred. C: Liquid stains (contamination) and stickiness occurred.

[0058] [Table 2]

[0059] The test results showed that the pest control metered-dose aerosol products of Examples 1 to 17 were all evaluated as being good in terms of wall adhesion of the control ingredient, irritation, and effect on fabric. This confirmed that the pest control metered-dose aerosol products of the present invention are effective in controlling mosquitoes in small spaces and reduce the irritation felt by people and pets when used in small spaces. Among these, the pest control metered-dose aerosol products of Examples 1 to 10 and 13, which had an internal pressure of 0.30 to 0.50 MPa at 25°C, a single spray volume of 0.1 to 0.4 mL, and a control ingredient content of 0.2 to 5.0 w / v%, were particularly good in terms of wall adhesion of the control ingredient and irritation. Furthermore, the pest control metered-dose aerosol products of Examples 1 to 7, 9, 11 to 14, and 17, which used ethanol as the organic solvent, caused absolutely no liquid stains (contamination) or stickiness on fabric, and were evaluated as having particularly excellent effects on fabric.

[0060] In contrast, the pump spray product of Comparative Example 1, the pest control metered dose aerosol product of Comparative Example 2, which had an internal pressure of less than 0.20 MPa at 25°C, the pest control metered dose aerosol product of Comparative Example 3, in which the specific gravity of the aerosol concentrate exceeded 0.86, and the pest control metered dose aerosol product of Comparative Example 6, in which the volume ratio (a / b) of the aerosol concentrate to the propellant was less than 50 / 50, showed poor wall adhesion of the control ingredient in narrow spaces. This suggests that the pump spray product of Comparative Example 1 and Comparative Examples 2, 3, and 6 do not have sufficient pest control effect in narrow spaces.

[0061] The pest control metered dose aerosol product of Comparative Example 4, which had an internal pressure of more than 0.60 MPa at 25°C, and the pest control metered dose aerosol product of Comparative Example 5, which had a spray volume of more than 1.0 mL, caused an irritating sensation when used in a small space and were not preferred.

[0062] (4) Use in a tent Volume 12m 3 (Area 8m 2A futon was placed in a tent measuring 1.5 m in height, and the pest control metered dose aerosol product of Example 1 was sprayed three times from the entrance at 9 p.m. in the summer, after which the subject went to sleep. The subject woke up at 8 a.m. the next day, but was not bitten by any mosquitoes in the tent during this time. In other words, mosquitoes were controlled for over 10 hours. Furthermore, the subject did not experience any irritation such as choking while staying in the tent, and was able to spend the time comfortably. No stains or dirt were found on the futon. [Industrial Applicability]

[0063] The pest control metered-dose aerosol product and pest control method of the present invention can be used to control pests, particularly mosquitoes, in small spaces such as automobiles and tents.

Claims

1. Volume is 2.0 to 12 m ３ A pest control metered-quantity aerosol product for controlling pests in a narrow space, the pest is a mosquito, The aerosol concentrate containing the pest control component and the organic solvent and the propellant are filled in an aerosol container equipped with a metered injection valve with a single injection volume of 0.08 to 2.0 mL, The control component has a vapor pressure of 2×10 at 30° C. －４ ~1 x 10 －２ A metered-dose aerosol product for pest control containing only pyrethroid compounds with a pesticidal activity of 1000 MPa (1.0 MPa) or less.

2. Volume is 2.0 to 12 m ３ A pest control metered-quantity aerosol product for controlling pests in a narrow space, an aerosol concentrate containing a pest control component and an organic solvent, and a propellant, filled in an aerosol container equipped with a metered injection valve with a single injection volume of 0.08 to 0.2 mL; The control component has a vapor pressure of 2×10 at 30° C. －４ ~1 x 10 －２ A metered-dose aerosol product for pest control containing only pyrethroid compounds with a pesticidal activity of 1000 MPa (1.0 MPa) or less.

3. Volume is 2.0 to 12 m ３ A pest control metered-quantity aerosol product for controlling pests in a narrow space, the pest is a mosquito, The aerosol concentrate containing the pest control component and the organic solvent and the propellant are filled in an aerosol container equipped with a metered injection valve with a single injection volume of 0.08 to 2.0 mL, A metered-dose aerosol product for controlling pests, wherein the content of the control component in the aerosol concentrate is 0.2 to 25.0 w / v %.

4. Volume is 2.0 to 12 m ３ A pest control metered-quantity aerosol product for controlling pests in a narrow space, an aerosol concentrate containing a pest control component and an organic solvent, and a propellant, filled in an aerosol container equipped with a metered injection valve with a single injection volume of 0.08 to 0.2 mL; A metered-dose aerosol product for controlling pests, wherein the content of the control component in the aerosol concentrate is 0.2 to 25.0 w / v %.

5. Volume is 2.0 to 12 m ３ A pest control metered-quantity aerosol product for controlling pests in a narrow space, The aerosol concentrate containing the pest control component and the organic solvent and the propellant are filled in an aerosol container equipped with a metered injection valve with a single injection volume of 0.08 to 2.0 mL, A metered dose aerosol product for pest control, intended for use in vehicle interiors and / or tents.

6. 6. The pest control metered dose aerosol product according to claim 1, which creates an atmosphere in a small space capable of controlling pests for 3 to 24 hours with a single application.

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