Aerosol composition and method for pest control

Abstract

To provide an aerosol composition with high visibility during use, and a method for pest control using the same.SOLUTION: An aerosol composition according to the present invention comprises: an aerosol base liquid containing a pest control component having volatility at room temperature, an anionic surfactant, and water; and a propellant.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to an aerosol composition and a method for controlling pests. [Background technology]

[0002] Conventionally, aerosol compositions have been used to control pests. For example, JP-A-2000-178101 (Patent Document 1) discloses a method for controlling mosquitoes outdoors, which is characterized by spraying an aerosol formulation containing an insecticidal component. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-178101 A Summary of the Invention [Problem to be solved by the invention]

[0004] The aerosol formulation used in the invention of Patent Document 1 adheres to the target object as transparent fine spray particles, making it difficult to distinguish between areas that have been treated with the aerosol formulation and areas that have not been treated. In addition, even in areas where treatment has been performed, it is difficult to grasp the amount of the aerosol formulation that has been treated, and there are cases where the amount of the aerosol formulation used is excessive or insufficient.

[0005] Therefore, there is a need to develop an aerosol composition that is highly visible when used, and a pest control method that uses the same. [Means for solving the problem]

[0006] The aerosol composition according to the present invention is characterized by comprising an aerosol concentrate containing a pest control component volatile at room temperature, an anionic surfactant, and water, and a propellant.

[0007] The pest control method according to the present invention is characterized in that an aerosol composition comprising an aerosol concentrate containing a pest control component volatile at room temperature, a surfactant, and water, and a propellant is sprayed onto the ground.

[0008] According to these configurations, the pest control component can be applied in a foam state that is relatively easy to maintain, so that the visibility of the aerosol composition is good when it is used. In particular, since the presence or absence of foam can be visually confirmed, it is easy to distinguish between treated and untreated areas. Furthermore, since the amount of foam applied in the treated area can be visually confirmed, it is easy to adjust the amount of the aerosol composition used for treatment to an appropriate amount.

[0009] Preferred embodiments of the present invention will be described below. However, the scope of the present invention is not limited to the preferred embodiments described below.

[0010] In one embodiment, the aerosol composition according to the present invention is preferably used for ground spraying.

[0011] By using a foam containing the aerosol composition of the present invention as an aerosol composition for spraying on the ground, which is placed on the ground so as to surround an area where it is desired to prevent the intrusion of pests, it is possible to prevent the intrusion of pests into that area.

[0012] In one embodiment of the aerosol composition according to the present invention, the ratio of the volume of the aerosol concentrate to the total volume of the aerosol concentrate and the propellant is preferably 10% or more and 90% or less.

[0013] This configuration makes it easier to maintain the foam that is formed when the aerosol composition is sprayed.

[0014] In one embodiment of the aerosol composition according to the present invention, the aerosol concentrate preferably further contains an alcohol having 2 or 3 carbon atoms.

[0015] This configuration makes it easier for the pest control component to dissolve in water, improving the stability of the aerosol composition. Also, the volatilization of the pest control component can be promoted, which tends to enhance the pest control effect.

[0016] In one embodiment of the aerosol composition according to the present invention, the aerosol concentrate preferably further contains a nonionic surfactant.

[0017] According to this configuration, the pest control component becomes more easily soluble in water, and the stability of the aerosol composition is improved.

[0018] Further features and advantages of the present invention will become more apparent from the following description of illustrative and non-limiting embodiments. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The embodiment of the aerosol composition and the pest control method according to the present invention will be described. In the following, an example in which the aerosol composition according to the present invention is applied to a pest control aerosol composition (hereinafter, simply referred to as aerosol composition) will be described.

[0020] [Constitution of aerosol composition] The aerosol composition according to this embodiment comprises an aerosol concentrate and a propellant.

[0021] (Composition of the aerosol concentrate) The aerosol concentrate is a liquid that forms foam when sprayed with a propellant. The aerosol concentrate according to the present embodiment contains a pest control component, an anionic surfactant, and water. The aerosol concentrate according to the present embodiment may also contain alcohol and a nonionic surfactant as optional components.

[0022] The aerosol concentrate according to the present embodiment contains a pest control component that is volatile at room temperature. Here, volatility at room temperature refers to the property of volatilizing at room temperature, and for example, a vapor pressure at 25° C. of 1.0×10 -5mmHg or more. The pest control component refers to a component that has at least one of a repellent effect and an insecticidal effect against the target pest. Examples of pest control components that are volatile at room temperature include pyrethroid compounds, carbamate compounds, oxadiazole compounds, and essential oil components. The pest control component may be a single component or a mixture of multiple components.

[0023] As a pyrethroid compound, metofluthrin (vapor pressure: 1.5 × 10 -5 mmHg (25°C)), profluthrin (vapor pressure: 7.7 x 10 -5 mmHg (25°C)), transfluthrin (vapor pressure: 1.7 x 10 -5 mmHg (25°C)), terallethrin (vapor pressure: 6.6 x 10 -4 mmHg (25° C.)) and the like are exemplified, but are not limited to these. Among these, it is preferable that the pyrethroid compound contains at least one of transfluthrin and metofluthrin, since the effects of the present invention can be easily obtained.

[0024] As a carbamate compound, propoxur (vapor pressure: 2.1 × 10 -5 Examples include, but are not limited to, 100 mmHg (25° C.) and the like.

[0025] As an oxadiazole compound, methoxadiazone (vapor pressure: 1.1 × 10 -3 Examples include, but are not limited to, 100 mmHg (25° C.).

[0026] Examples of essential oil components include, but are not limited to, citral, citronellal, l-menthol, menthone, citronellyl acetate, cinnamic aldehyde, terpineol, terpinen-4-ol, nonyl alcohol, cis-jasmone, limonene, linalool, 1,8-cineole, geraniol, α-pinene, p-menthane-3,8-diol, eugenol, menthyl acetate, thymol, benzyl benzoate, and benzyl salicylate. For example, the vapor pressure of l-menthol at 25°C is 6.4 x 10-2 mmHg, and the vapor pressure of p-menthane-3,8-diol at 25 °C is 1.1 × 10 -3 mmHg, and the vapor pressure of 1,8-cineole at 25°C is 1.9 × 10 -2 mmHg.

[0027] The aerosol concentrate may contain essential oils containing essential oil components. Examples of such essential oils include, but are not limited to, peppermint oil, orange oil, fennel oil, cinnamon oil, clove oil, turpentine oil, eucalyptus oil, Japanese cedar oil, jasmine oil, neroli oil, peppermint oil, bergamot oil, petitgrain oil, lemon oil, lemongrass oil, cinnamon oil, citronella oil, geranium oil, and tea tree oil. Note that, since essential oils are mixtures, their vapor pressure cannot be specified, but as is well known, they contain essential oil components that evaporate at room temperature.

[0028] In addition, dichlorvos (1.6×10 -2 mmHg (25°C), Hydroprene (1.9 x 10 -4 mmHg (25°C), amidoflumet (1.1 x 10 -3 mmHg (20°C), DEET (1.7 x 10 -3 mmHg (25°C), icaridin (4.4 × 10 -4 mmHg (25 °C)), and 3-(N-butyl-N-acetyl)aminopropionic acid ethyl ester (1.1 × 10 -3 mmHg (20°C)) is an example. The vapor pressure of amidoflumet and 3-(Nn-butyl-N-acetyl)aminopropionic acid ethyl ester at 25°C is 1.1 x 10 -3 mmHg. Therefore, amidoflumet and 3-(Nn-butyl-N-acetyl)aminopropionic acid ethyl ester are not classified as having a vapor pressure of 1.0×10 at 25°C. -5 It is a pest control ingredient that is volatile at room temperature (at temperatures above 100°C).

[0029] In addition, the aerosol concentrate according to the present embodiment may contain a pest control component that is not volatile at room temperature. Examples of pest control components that are not volatile at room temperature include, but are not limited to, fenothrin, permethrin, bifenthrin, cyfluthrin, cypermethrin, cyphenothrin, etofenprox, prallethrin, phthalthrin, and pyrethrins.

[0030] The content of the pest control component volatile at room temperature in the aerosol concentrate according to the present embodiment is not particularly limited, and may be, for example, 0.001 mass / volume% or more and 10 mass / volume% or less. The content of the pest control component volatile at room temperature in the aerosol concentrate is preferably 0.01 mass / volume% or more, and more preferably 0.1 mass / volume% or more. The content of the pest control component volatile at room temperature in the aerosol concentrate is preferably 8 mass / volume% or less, and more preferably 5 mass / volume% or less. In addition, when the aerosol concentrate is not a homogeneous solution (such as when it is separated into an oil phase and an aqueous phase), the total volume of the separated phases is taken as the volume of the entire aerosol concentrate, and the content of the pest control component is specified.

[0031] The pests that can be controlled by the room temperature volatile pest control component are not particularly limited, and examples thereof include flying pests such as mosquitoes such as Culex pipiens, Aedes albopictus, Culex quinquefasciatus, and Aedes aegypti, flies, moths, bees, horseflies, black flies, midges, leafhoppers, mealworms, biting midges, moths, and box moths, and crawling pests such as cockroaches, stink bugs, ants, spiders, pillbugs, woodlouse, mites, ticks, lice, centipedes, caterpillars, millipedes, spiders, termites, powderpost beetles, ground beetles, earwigs, silverfish, cockroaches, and sea crickets.

[0032] As the anionic surfactant according to the present embodiment, anionic surfactants known in the art can be used. That is, examples of anionic surfactants include phosphate-type surfactants such as alkyl phosphates such as potassium lauryl phosphate and sodium lauryl phosphate, and POE alkyl ether phosphates such as sodium POE lauryl ether phosphate, alkyl sulfates such as ammonium lauryl sulfate, potassium lauryl sulfate, sodium lauryl sulfate, triethanolamine lauryl sulfate, and sodium cetyl sulfate, and sulfate-type surfactants such as POE alkyl ether sulfates such as sodium POE lauryl ether sulfate, triethanolamine POE lauryl ether sulfate, sodium POE alkyl ether sulfate, and triethanolamine POE alkyl ether sulfate, potassium POE lauryl ether acetate, sodium POE lauryl ether acetate, potassium POE tridecyl ether acetate, and sodium POE tridecyl ether acetate, and POE alkyl ether carboxylates such as potassium laurate and sodium laurate, sodium lauryl sulfoacetate, sodium tetradecene sulfonate, and dioctyl sulfosuccinate. Sulfonate type surfactants such as sodium ethyl ester, sodium dialkyl sulfosuccinate, sodium alkyl naphthalene sulfonate, sodium alkyl diphenyl ether disulfonate, sodium alkane sulfonate, dodecyl benzene sulfonic acid, and sodium dodecyl benzene sulfonate, as well as N-coconut oil fatty acid acyl-L-glutamic acid triethanolamine, N-coconut oil fatty acid acyl-L-glutamic acid potassium, N-coconut oil fatty acid acyl-L-glutamic acid sodium, N-lauroyl- N-acyl glutamates such as triethanolamine L-glutamate, potassium N-lauroyl-L-glutamate, sodium N-lauroyl-L-glutamate, potassium N-myristoyl-L-glutamate, sodium N-myristoyl-L-glutamate, and sodium N-stearoyl-L-glutamate; N-acyl glycine salts such as potassium N-cocoyl glycine and sodium N-cocoyl glycine; and N-acyl alanine salts such as triethanolamine N-cocoyl-DL-alanine.and acylalanine salts such as sodium lauroylmethylalanine, and amino acid surfactants, but not limited thereto. More specifically, the anionic surfactant may include, for example, at least one of POE alkyl ether sulfate and sodium dialkyl sulfosuccinate. The anionic surfactant may be a single component or a mixture of multiple components.

[0033] The content of the anionic surfactant in the aerosol concentrate according to the present embodiment is not particularly limited, and may be, for example, 0.01 mass / volume% or more and 10 mass / volume% or less. The content of the anionic surfactant in the aerosol concentrate is preferably 0.05 mass / volume% or more, and more preferably 0.1 mass / volume% or more. The content of the anionic surfactant in the aerosol concentrate is preferably 8 mass / volume% or less, and more preferably 5 mass / volume% or less. When the content of the anionic surfactant is 0.01 mass / volume% or more, the aerosol concentrate can be placed in a foam state that is relatively easy to maintain. When the content of the anionic surfactant is 10 mass / volume or less, the volatilization of the pest control component is not hindered.

[0034] The aerosol concentrate according to the present embodiment may contain alcohol. The alcohol plays a role in helping the pest control component dissolve in water to enhance the stability of the aerosol composition. The alcohol is not particularly limited, and may be a monohydric alcohol (methanol, ethanol, 1-propanol, 2-propanol, etc.) or a polyhydric alcohol (ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, etc.). If the alcohol contains an alcohol having 2 or 3 carbon atoms, the pest control component is easily dissolved in water, improving the stability of the aerosol composition, and the pest control effect is easily enhanced because the volatilization of the pest control component can be promoted. The aerosol concentrate according to the present embodiment preferably contains one or more alcohols selected from the group consisting of ethanol, 1-propanol, 2-propanol, ethylene glycol, and propylene glycol. In addition, when the aerosol concentrate according to the present embodiment contains an alcohol having 2 or 3 carbon atoms, it is not prevented from containing an alcohol having 1 or 4 or more carbon atoms.

[0035] The aerosol concentrate according to the present embodiment may contain a nonionic surfactant. The nonionic surfactant plays a role in helping the pest control component dissolve in water to enhance the stability of the aerosol composition. As such a nonionic surfactant, a nonionic surfactant known in the art can be used. An example of a nonionic surfactant is an ether-type nonionic surfactant, for example, POE·POP alkyl ethers such as POE·POP cetyl ether and POE·POP decyl tetradecyl ether, and POE alkyl ethers such as POE cetyl ether, POE stearyl ether, POE oleyl ether, POE lauryl ether, POE behenyl ether, POE octyldodecyl ether, POE isocetyl ether, POE isostearyl ether, and POE styryl phenyl ether.Other examples of nonionic surfactants include ester-type nonionic surfactants, such as polyethylene glycol fatty acid esters such as polyethylene glycol monostearate, POE hydrogenated castor oils such as POE hydrogenated castor oil, POE castor oils such as POE castor oil, POE glycerin fatty acid esters such as POE glyceryl monostearate and POE glyceryl monooleate, POE alkyl ether fatty acid esters such as POE cetyl ether stearate and POE lauryl ether isostearate, POE sorbitan fatty acid esters such as POE sorbitan monococonut oil fatty acid, POE sorbitan monostearate, POE sorbitan monooleate, and POE sorbitan triisostearate, POE sorbitan monolaurate, POE sorbitan tetrastearate, POE sorbitan tetraoleate, and POE sorbitan monolau ... Examples of suitable surfactants include POE sorbitol fatty acid esters such as POE sorbitol esters of glyceryl acetate, hexaglyceryl monolaurate, hexaglyceryl monomyristate, pentaglyceryl monolaurate, pentaglyceryl monomyristate, pentaglyceryl monooleate, pentaglyceryl monostearate, decaglyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monostearate, decaglyceryl monoisostearate, decaglyceryl monooleate, and decaglyceryl monolinoleate, fatty acid alkanolamides such as coconut oil fatty acid monoethanolamide, coconut oil fatty acid diethanolamide, lauric acid diethanolamide, and coconut oil fatty acid N-methylethanolamide, and POE lanolin alcohol such as POE lanolin alcohol. However, the above substances are merely examples. The nonionic surfactant may be a single component or a mixture of multiple components.

[0036] The content of the nonionic surfactant in the aerosol concentrate according to the present embodiment is not particularly limited, but may be, for example, 0.01 mass / volume% or more and 10 mass / volume% or less. The content of the nonionic surfactant in the aerosol concentrate is preferably 0.05 mass / volume% or more, more preferably 0.1 mass / volume% or more. The content of the nonionic surfactant in the aerosol concentrate is preferably 8 mass / volume% or less, more preferably 5 mass / volume% or less. When the content of the nonionic surfactant is 0.01 mass / volume% or more, the pest control component can be stably dissolved in the aerosol concentrate. When the content of the nonionic surfactant is 10 mass / volume or less, the volatilization of the pest control component is not hindered.

[0037] The aerosol concentrate according to the present embodiment may contain any component within the scope of the invention, such as a fragrance component, a deodorizing component, a disinfecting or sterilizing component, a pH adjuster, a foam stabilizer, a lubricant, etc.

[0038] The aromatic component is a component that emits an aroma. Examples of the aromatic component include essential oil components and synthetic fragrances. In addition, the essential oil component, which is a pest control component that is volatile at room temperature, may also function as an aromatic component. The aromatic component may be one type of component or a combination of two or more types of components.

[0039] The deodorizing component is a component that can eliminate odors. Examples of the deodorizing component include components that adsorb odor components such as green tea extract, persimmon tannin, lauryl methacrylate, methyl benzoate, methyl phenylacetate, geranyl crotonate, benzyl acetate, benzyl propionate, and silver, and components that mask odor components such as the above-mentioned aromatic components. The deodorizing component may be one type of component or a combination of two or more types of components.

[0040] The disinfecting / bactericidal component is a component that removes or kills microorganisms, molds, bacteria, etc. Examples of the disinfecting / bactericidal component include hinokitiol, 2-mercaptobenzothiazole, 2-(4-thiazolyl)benzimidazole, 5-chloro-2-methyl-4-isothiazolin-3-one, trifoline, 3-methyl-4-isopropylphenol, ortho-phenylphenol, 3-iodo-2-propynyl butylcarbamate, chlorhexidine gluconate, polylysine, chitosan, tetrahydrolinalool, dialkyldimethylammonium chloride, cetylpyridinium chloride, benzalkonium chloride, benzethonium chloride, zinc pyrithione, sodium pyrithione, etc. The disinfecting / bactericidal component may be one type of component or a combination of two or more types of components.

[0041] Examples of the foam stabilizer include higher alcohols such as myristyl alcohol, cetyl alcohol, stearyl alcohol, and behenyl alcohol, and thickeners such as alginic acid and its salts, carrageenan, xanthan gum, carboxymethyl cellulose and its salts, carboxyethyl cellulose and its salts, hydroxypropyl methyl cellulose, and hydroxyethyl cellulose, etc. The foam stabilizer may be a single component or a combination of two or more components.

[0042] Examples of pH adjusters include citric acid and its salts, succinic acid and its salts, phosphoric acid and its salts, sodium hydroxide, potassium hydroxide, sodium bicarbonate, sodium carbonate, triethanolamine, etc. The pH adjuster may be a single component or a combination of two or more components.

[0043] Examples of lubricants include silicic acid anhydride, hydrophobic silica, calcium silicate, diatomaceous earth, high-purity silica, talc and other silicic acid compounds.

[0044] The aerosol concentrate according to the present embodiment may also contain other solvents than water and optionally contained alcohol. Examples of such solvents include acetone, hydrocarbons (paraffin-based solvents, isoparaffin-based solvents, etc.), glycol ethers (propylene glycol monomethyl ether, propylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, etc.), higher fatty acid esters (isopropyl myristate, hexyl laurate, isopropyl palmitate, etc.), silicones (dimethyl silicone, amino-modified silicone, etc.), etc. This type of solvent may be one type of component or a combination of two or more types of components.

[0045] (Propellant) The propellant according to the present embodiment may be a propellant commonly used in the field of aerosols. That is, the propellant may be, but is not limited to, liquefied petroleum gas (LPG), dimethyl ether, fluorohydrocarbon, carbon dioxide, nitrogen, nitrous oxide, etc. The propellant preferably includes at least one of liquefied petroleum gas (LPG) and dimethyl ether. The propellant may be a single component or a mixture of multiple components.

[0046] (Composition of the aerosol composition) In the aerosol composition according to the present embodiment, the ratio of the volume of the aerosol concentrate to the total volume of the aerosol concentrate and the propellant is preferably 10% or more and 90% or less. When the ratio of the volume of the aerosol concentrate is within the above range, the foam formed when the aerosol composition is sprayed is easily maintained. The ratio of the volume of the aerosol concentrate to the total volume of the aerosol concentrate and the propellant is more preferably 20% or more, even more preferably 30% or more, and particularly preferably 40% or more. The ratio of the volume of the aerosol concentrate to the total volume of the aerosol concentrate and the propellant is more preferably 80% or less, even more preferably 75% or less, and particularly preferably 70% or less.

[0047] Use of the aerosol composition The aerosol composition according to the present embodiment can be enclosed in an aerosol container known in the art. A typical aerosol container has an aerosol pressure-resistant container that contains an aerosol concentrate and a propellant, an aerosol valve attached to the aerosol pressure-resistant container, and an ejection member (ejection button) attached to the aerosol valve. When the ejection member is operated, the aerosol valve is opened, and the aerosol concentrate and the propellant contained in the aerosol pressure-resistant container are ejected from the ejection member.

[0048] The injection member is a member attached to the aerosol pressure container via the aerosol valve. The injection button is formed with an inner passage in the operating section through which the aerosol composition taken in from the aerosol pressure container via the stem hole of the aerosol valve passes, and an injection port through which the aerosol composition is injected. In this embodiment, the number, shape, arrangement, etc. of the injection port in the injection member are not particularly limited, but for example, the inner diameter of the injection port (injection port hole diameter) is preferably 0.1 mm or more and 3.0 mm from the viewpoint of adhesion to the ground. The inner diameter of the injection port is more preferably 0.2 mm or more, and even more preferably 0.3 mm or more. The inner diameter of the injection port is more preferably 2.0 mm or less, and even more preferably 1.5 mm or less. In addition, when the injection member has a plurality of injection ports, it is preferable that each of the injection ports satisfies the above-mentioned dimensional conditions. In addition, the injection member may be any of an upright injection type, an inverted injection type, and an upright and inverted combination type. For example, when the main intended use is to spray the aerosol composition onto the ground, an inverted spray member is easy to use.

[0049] When the aerosol concentrate and the propellant are sprayed from the spraying member, the propellant vaporizes and the aerosol concentrate becomes foamy. Since the surface tension of the aerosol concentrate containing a surfactant is relatively low, the foam formed at this time is maintained in place for a while. By maintaining the foam containing the pest control component and a part of the vaporized propellant, the pest control component that is volatile at room temperature is prevented from suddenly volatilizing, so that the pest control effect can be continuously exerted. In addition, the propellant held in the foam together with the pest control component diffuses into the air, carrying the pest control component with it, when the foam collapses. This action promotes the volatilization of the pest control component. Furthermore, since the collapse of the foam containing the pest control component and the propellant proceeds gradually, the action of the propellant that promotes the volatilization of the pest control component is continuously exerted. In addition, by installing the pest control component in a foam form, the penetration of the pest control component into the installation surface can be suppressed compared to when it is sprayed in a liquid form. This also contributes to the sustained pest control effect.

[0050] In addition, since the foam formed remains in place, it is easy to visually distinguish whether foam is present or not. Therefore, it is easy to determine whether the pest control ingredient is present or not, and it is easy to avoid using an excessive amount of the pest control ingredient. In addition, since the amount of foam is easy to visually check, it is easy to use the appropriate amount of the pest control ingredient.

[0051] In addition, according to the aerosol composition of this embodiment, when the foam collapses and the propellant volatilizes, the pest control component volatilizes around. This allows the pest control component to be spread around the area where the foam is placed, making it easier to achieve pest control effects. Furthermore, a certain amount of pest control component remains in the area where the foam is placed even after the foam is removed, so the control effect against both flying pests and crawling pests can be sustained even after the foam is removed.

[0052] For example, when a foam containing the aerosol composition according to the present embodiment is placed on the ground so as to surround an area where it is desired to prevent the intrusion of pests, it is possible to prevent the intrusion of pests into the area. This effect is manifested in the space surrounding the foam. This is because the pest control component volatilizes from the foam. Therefore, the control effect is manifested not only against pests walking on the ground on which the foam is placed, but also against pests flying around the area. In addition, when the foam containing the aerosol composition according to the present embodiment is placed on a wall surface, the pest control effect can be continuously manifested around the wall surface. The surface (ground, wall surface, etc.) on which the foam is placed may be indoors or outdoors.

[0053] Furthermore, for example, the aerosol composition according to the present embodiment can be sprayed directly on pests to control the pests. In this case, the pests may be in any form, such as adults, larvae, or eggs.

[0054] The method of using the aerosol composition according to this embodiment is not limited to the above example.

[0055] [Modifications] The present inventors have found that the aerosol composition according to the above embodiment can form a foam that is easily maintained under a wide range of spray conditions (such as the shape of the aerosol container). Based on this discovery by the present inventors, the present application claims a patent for an invention related to a suitable aerosol composition in view of the above-mentioned method of use. However, the configuration of the aerosol composition according to the above embodiment is merely one example of a suitable aerosol composition in view of the above-mentioned method of use, and as long as a foam that is easily maintained can be formed by adjusting the spray conditions, the aerosol composition that can achieve the effects of the present invention is not limited to the above embodiment. This should be naturally understood by those skilled in the art. For example, the surfactant contained in the aerosol concentrate is not limited to anionic surfactants. Therefore, a pest control method that includes spraying an aerosol concentrate containing a pest control component that is volatile at room temperature, a surfactant, and water, and a propellant, on the ground, is also an aspect of the present invention.

[0056] Other embodiments Regarding other configurations, it should be understood that the embodiments disclosed in this specification are illustrative in all respects and that the scope of the present invention is not limited thereto. A person skilled in the art would easily understand that appropriate modifications are possible without departing from the spirit of the present invention. Therefore, other embodiments modified without departing from the spirit of the present invention are naturally included in the scope of the present invention. EXAMPLES

[0057] The present invention will be further described below with reference to examples, but the present invention is not limited to the following examples.

[0058] (1) Basic test of control effect against Aedes albopictus 〔reagent〕 Transfluthrin, p-menthane-3,8-diol, l-menthol, 1,8-cineole, and metofluthrin were used as pest control ingredients volatile at room temperature. As pest control ingredients with low volatility at room temperature (pest control ingredients that do not fall under the pest control ingredients volatile at room temperature according to the present invention), fenothrin and etofenprox were used. As anionic surfactants, POE(2) sodium lauryl ether sulfate, sodium dioctyl sulfosuccinate, sodium POE tridecyl ether acetate, and potassium laurate were used. As nonionic surfactants, POE(12)POP(6) decyl tetradecyl ether, POE(40) castor oil, POE styryl phenyl ether, and polyethylene glycol monostearate were used. As alcohols, 2-propanol, ethanol, and propylene glycol were used. As a propellant, liquefied petroleum gas (LPG) was used. The liquefied petroleum gas used was adjusted so that its vapor pressure at 25°C was 0.49 MPa.

[0059] [Sample preparation] Example 1 0.1112 parts by mass of transfluthrin, 0.50 parts by mass of sodium POE (2) lauryl ether sulfate, and 0.53 parts by mass of POE (12) POP (6) decyl tetradecyl ether were added to 15 parts by mass of 2-propanol, and the mixture was stirred and dissolved. Then, water was added to make up to 100 mL to prepare an aerosol concentrate. 60 mL of the aerosol concentrate was filled into an aerosol pressure can (full capacity 185 mL, content 148 mL), and after closing with an aerosol valve (inverted injection valve), 40 mL of liquefied petroleum gas was pressure-filled. An injection button (nozzle hole diameter 0.4 mm) was attached to the aerosol valve to obtain a sample of Example 1. In the sample of Example 1, an aerosol composition (a composition containing an aerosol concentrate and liquefied petroleum gas) was formed in the aerosol pressure can. That is, the term "sample" here refers to an aerosol pressure can filled with an aerosol composition, and this also applies to other examples below. The aerosol pressure canister, aerosol valve, and spray button used in the following examples were the same in specifications.

[0060] Example 2 0.1668 parts by mass of transfluthrin, 0.50 parts by mass of sodium POE(2) lauryl ether sulfate, and 0.80 parts by mass of POE(12)POP(6) decyl tetradecyl ether were added to 15 parts by mass of 2-propanol, and the mixture was stirred and dissolved, and then water was added to make up to 100 mL to prepare an aerosol concentrate. 40 mL of the aerosol concentrate was filled into an aerosol pressure can, and after closing it with an aerosol valve, 60 mL of liquefied petroleum gas was filled under pressure. A spray button was attached to the aerosol valve to obtain a sample of Example 2.

[0061] Example 3 0.0740 parts by mass of transfluthrin, 0.50 parts by mass of sodium POE(2) lauryl ether sulfate, and 0.36 parts by mass of POE(12)POP(6) decyl tetradecyl ether were added to 15 parts by mass of 2-propanol, and the mixture was stirred and dissolved, and then water was added to make up to 100 mL to prepare an aerosol concentrate. 90 mL of the aerosol concentrate was filled into an aerosol pressure can, and after closing it with an aerosol valve, 10 mL of liquefied petroleum gas was filled under pressure. A spray button was attached to the aerosol valve to obtain a sample of Example 3.

[0062] Example 4 1.50 parts by mass of transfluthrin, 1 part by mass of sodium dioctyl sulfosuccinate, 2 parts by mass of POE (40) castor oil, and 1 part by mass of POE styryl phenyl ether were added to 9 parts by mass of 2-propanol, stirred and dissolved, and then water was added to make up to 100 mL to prepare an aerosol concentrate. 40 mL of the aerosol concentrate was filled into an aerosol pressure can, and after closing it with an aerosol valve, 60 mL of liquefied petroleum gas was filled under pressure. A spray button was attached to the aerosol valve to obtain a sample of Example 4.

[0063] Example 5 1.50 parts by mass of p-menthane-3,8-diol, 1 part by mass of sodium dioctyl sulfosuccinate, 2 parts by mass of POE (40) castor oil, and 1 part by mass of POE styryl phenyl ether were added to 9 parts by mass of 2-propanol, and the mixture was stirred and dissolved, and then water was added to make up to 100 mL to prepare an aerosol concentrate. 40 mL of the aerosol concentrate was filled into an aerosol pressure can, and after closing it with an aerosol valve, 60 mL of liquefied petroleum gas was filled under pressure. A spray button was attached to the aerosol valve to obtain a sample of Example 5.

[0064] Example 6 0.75 parts by mass of l-menthol, 0.75 parts by mass of 1,8-cineole, 1 part by mass of sodium dioctyl sulfosuccinate, and 2 parts by mass of polyethylene glycol monostearate were added to 9 parts by mass of 2-propanol, stirred and dissolved, and then water was added to make up to 100 mL to prepare an aerosol concentrate. 40 mL of the aerosol concentrate was filled into an aerosol pressure can, and after closing it with an aerosol valve, 60 mL of liquefied petroleum gas was filled under pressure. A spray button was attached to the aerosol valve to obtain a sample of Example 6.

[0065] Example 7 0.75 parts by mass of metofluthrin, 0.75 parts by mass of etofenprox, 1 part by mass of sodium dioctyl sulfosuccinate, 2 parts by mass of POE (40) castor oil, and 1 part by mass of POE styrylphenyl ether were added to 9 parts by mass of 2-propanol, stirred and dissolved, and then water was added to make up to 100 mL to prepare an aerosol concentrate. 40 mL of the aerosol concentrate was filled into an aerosol pressure can, and after closing it with an aerosol valve, 60 mL of liquefied petroleum gas was filled under pressure. A spray button was attached to the aerosol valve to obtain a sample of Example 7.

[0066] Example 8 1.50 parts by mass of transfluthrin, 0.05 parts by mass of sodium POE tridecyl ether acetate, 2 parts by mass of POE (40) castor oil, and 1 part by mass of POE styryl phenyl ether were added to 9 parts by mass of ethanol, stirred and dissolved, and then water was added to make up to 100 mL to prepare an aerosol concentrate. 40 mL of the aerosol concentrate was filled into an aerosol pressure can, and after closing it with an aerosol valve, 60 mL of liquefied petroleum gas was filled under pressure. A spray button was attached to the aerosol valve to obtain a sample of Example 8.

[0067] Example 9 1.50 parts by mass of transfluthrin, 10 parts by mass of potassium laurate, 2 parts by mass of POE (40) castor oil, and 1 part by mass of POE styryl phenyl ether were added to 9 parts by mass of propylene glycol, stirred and dissolved, and then water was added to make up to 100 mL to prepare an aerosol concentrate. 40 mL of the aerosol concentrate was filled into an aerosol pressure can, and after closing it with an aerosol valve, 60 mL of liquefied petroleum gas was filled under pressure. A spray button was attached to the aerosol valve to obtain a sample of Example 9.

[0068] Example 10 0.75 parts by mass of transfluthrin, 0.75 parts by mass of 1,8-cineole, 1 part by mass of sodium dioctyl sulfosuccinate, 2 parts by mass of POE (40) castor oil, and 1 part by mass of POE styryl phenyl ether were added to 9 parts by mass of 2-propanol, and the mixture was stirred and dissolved, and then water was added to make up to 100 mL to prepare an aerosol concentrate. 40 mL of the aerosol concentrate was filled into an aerosol pressure can, and after closing it with an aerosol valve, 60 mL of liquefied petroleum gas was filled under pressure. A spray button was attached to the aerosol valve to obtain a sample of Example 10.

[0069] Comparative Example 1 0.0740 parts by mass of transfluthrin and 0.36 parts by mass of POE(12)POP(6) decyl tetradecyl ether were added to 15 parts by mass of 2-propanol, and the mixture was stirred and dissolved, and then water was added to make up to 100 mL to prepare an aerosol concentrate. 90 mL of the aerosol concentrate was filled into an aerosol pressure canister, and after closing it with an aerosol valve, 10 mL of liquefied petroleum gas was filled under pressure. A spray button was attached to the aerosol valve to obtain a sample of Comparative Example 1. Comparative Example 1 is an example that does not contain an anionic surfactant.

[0070] Comparative Example 2 0.1668 parts by mass of transfluthrin and 0.80 parts by mass of POE(12)POP(6) decyl tetradecyl ether were added to 15 parts by mass of 2-propanol, and the mixture was stirred and dissolved, and then water was added to make up to 100 mL to prepare an aerosol concentrate. 40 mL of the aerosol concentrate was filled into an aerosol pressure canister, and after closing it with an aerosol valve, 60 mL of liquefied petroleum gas was filled under pressure. A spray button was attached to the aerosol valve to obtain a sample of Comparative Example 2. Comparative Example 2 is an example that does not contain an anionic surfactant.

[0071] Comparative Example 3 1.50 parts by mass of fenothrin, 0.50 parts by mass of sodium dioctyl sulfosuccinate, 2 parts by mass of POE (40) castor oil, and 1 part by mass of POE styryl phenyl ether were added to 9 parts by mass of 2-propanol, stirred and dissolved, and then water was added to make up to 100 mL to prepare an aerosol concentrate. 40 mL of the aerosol concentrate was filled into an aerosol pressure can, and after closing it with an aerosol valve, 60 mL of liquefied petroleum gas was filled under pressure. A spray button was attached to the aerosol valve to obtain a sample of Comparative Example 3. Comparative Example 3 is an example in which a pest control component with low volatility at room temperature was used, without containing a pest control component with room temperature volatility.

[0072] Comparative Example 4 1.50 parts by mass of transfluthrin, 2 parts by mass of POE (40) castor oil, and 1 part by mass of POE styryl phenyl ether were added to 9 parts by mass of 2-propanol, stirred and dissolved, and then water was added to make up to 100 mL to prepare an aerosol concentrate. 40 mL of the aerosol concentrate was filled into an aerosol pressure can, and after closing it with an aerosol valve, 60 mL of liquefied petroleum gas was filled under pressure. A spray button was attached to the aerosol valve to obtain a sample of Comparative Example 4. Comparative Example 4 is an example that does not contain an anionic surfactant.

[0073] 〔evaluation〕 The aerosol composition was sprayed from each sample of the Examples and Comparative Examples to form foam, and the pest control effect and properties of the foam were evaluated.

[0074] (Pest control effect) The aerosol composition was sprayed onto a glass petri dish with a diameter of 150 mm so that the amount of transfluthrin discharged was 15 mg. The inside of a glass test box (width 80 cm x depth 45 cm x height 120 cm) was set to an environment of 25°C temperature and 50% RH humidity, and the glass petri dish was placed at the center of the bottom of the test box. A cage containing 20 adult female Aedes albopictus mosquitoes as test insects was hung at a height of 60 cm at the horizontal center of the test box. After the start of the test, the number of test insects knocked down over time was confirmed, and the KT 50 and K.T. 90 In Comparative Example 3, no knockdown of the test insects was observed 2 hours after the start of the test, so the KT 50 and K.T. 90 The value of has not been calculated.

[0075] (Foam properties) In the above-mentioned pest control effect evaluation, the appearance of the aerosol composition sprayed onto the glass petri dish was visually observed. Based on the observation results, the appearance was classified into the following three levels. A: The aerosol composition produced foam. The foam was maintained 5 minutes after spraying. B: The aerosol composition produced bubbles. The bubbles disappeared within 5 minutes after spraying. C: The aerosol composition did not produce foam.

[0076] 〔result〕 The evaluation results of each of the Examples and Comparative Examples are shown in Tables 1 and 2.

[0077] Table 1: Examples and Comparative Examples [Table 1]

[0078] (2) Field test of control effect against Aedes albopictus The control effect of the aerosol composition against Aedes albopictus was confirmed by counting the number of Aedes albopictus that flew to subjects at a test site set up outdoors where Aedes albopictus, a type of mosquito, lives. The test site was set up with a treatment area where the aerosol composition was placed and an untreated area where no aerosol composition was placed, with the distance between the treatment area and the untreated area set to 30 m or more.

[0079] [Test Method] First, a subject who had worn arm covers on one arm and one leg stayed in the untreated area for 10 minutes, and the number of times that Asian tiger mosquitoes landed on the two arm covers during that time was counted to determine the number of Asian tiger mosquitoes landing on the two arm covers, x0. The same measurement was also performed in the treated area where the aerosol composition was not placed, and the number of Asian tiger mosquitoes landing on the two arm covers, y0, was determined.

[0080] Next, in the treatment area, the aerosol composition of Example 4 was sprayed for about 30 seconds, and the composition was placed in a manner that drew a circle with a radius of 2.5 m. After that, the subject stayed inside the circle of the composition for 10 minutes, and the number of times that Aedes albopictus landed on the two arm covers during that time was counted, and the number of times y that Aedes albopictus landed was determined.

[0081] The number of landings of Asian tiger mosquitoes in the untreated area (x) and the number of landings of Asian tiger mosquitoes in the treated area (y) were determined by the same method as above, 1 hour, 2 hours, 3 hours, 4 hours, and 5 hours after the aerosol composition was placed. However, in each measurement from 1 hour to 5 hours after the first measurement, a new aerosol composition was not placed in the treated area, and the measurement was performed inside the circle of the aerosol composition placed before the first measurement.

[0082] The corrected repellency rate R1 against Aedes albopictus was calculated based on the following formula (1). In formula (1), the term y / x represents the attraction rate at the time of measurement, and the term x0 / y0 is a coefficient that corrects for the difference in the number of Aedes albopictus mosquitoes that arise from the difference in location between the treated and untreated areas. The corrected attraction rate is subtracted from 1 to give the corrected repellency rate, which is multiplied by 100 to express it as a percentage to give the corrected repellency rate R1.

number

[0083] 〔result〕 The corrected repellency rates immediately after application of the aerosol composition (0 hours), 1 hour, 2 hours, 3 hours, 4 hours, and 5 hours later are shown in Table 2. It was shown that a certain degree of control effect was maintained at least up to 5 hours after application of the composition.

[0084] Table 2: Field test of control efficacy against Asian tiger mosquitoes [Table 2]

[0085] (3) Field test of control effect against Hirosia iyoensis The control effect of the aerosol composition against Hirosia iyoensis, a type of horsefly, was confirmed by counting the number of Hirosia iyoensis that flew to subjects at a test site set up outdoors where the species of horsefly Hirosia iyoensis lives. The test site was set up into a treatment area where the aerosol composition was placed and an untreated area where no aerosol composition was placed, with the distance between the treatment area and the untreated area being about 35 m.

[0086] First, a subject who had previously worn arm covers on one arm and one leg stayed in the untreated area for 10 minutes, and the number of times that Hirosia iyoshino landed on the two arm covers during that time was counted to determine the number of times that Hirosia iyoshino landed, x0. Similar measurements were also made in the treated area where the aerosol composition was not placed, to determine the number of times that Hirosia iyoshino landed, y0.

[0087] Next, in the treatment area, the aerosol composition of Example 4 was sprayed for about 18 seconds and the composition was placed in a manner that drew a circle with a radius of 1.5 m. Thereafter, the subject stayed inside the circle of the composition for 10 minutes, and the number of times that Hirosia iyoensis landed on the two arm covers during that time was counted, and the number of times y that Hirosia iyoensis landed was determined.

[0088] 0.5 and 1 hour after the aerosol composition was placed, the number of times x that Hirosia iyoensis landed in the untreated plot and the number of times y that Hirosia iyoensis landed in the treated plot were determined using the same method as above. However, in the measurements 0.5 and 1 hour later, no new aerosol composition was placed in the treated plot, and the measurements were performed inside the circle of the aerosol composition that had been placed before the first measurement.

[0089] Based on the above formula (1), the corrected repellency rate R1 against Hirosia iyoensis was calculated.

[0090] 〔result〕 The corrected repellency rates immediately after application of the aerosol composition (0 hours), 0.5 hours, and 1 hour later are shown in Table 3. It was shown that a certain degree of control effect was maintained at least up to 1 hour after application of the composition.

[0091] Table 3: Field test of control efficacy against Hirosia iyoensis [Table 3]

[0092] (4) Basic test of the control effect against creeping pests [Test Method] The aerosol composition of Example 4 was sprayed onto the bottom surface of a tub (16 cm long, 22 cm wide, 11 cm deep), and the composition was placed in a manner that drew a circle with a radius of about 15 cm. Five test insects (described below) were placed in the center of the circle of the composition, and the movements of the test insects were observed for 5 minutes. During the 5 minutes, the number of times (a) the test insects touched the aerosol composition and turned back, and the number of times (b) the test insects climbed over the aerosol composition were counted.

[0093] Two hours, four hours, and six hours after placing the aerosol composition, the number of times (a) the test insects touched the aerosol composition and turned back, and the number of times (b) the test insects climbed over the aerosol composition were counted using the same method as above.

[0094] The repellency rate R2 for each test insect was calculated based on the following formula (2).

number

[0095] 〔result〕 Table 3 shows the repellency rate when the test insect was the Japanese black wood ant and the repellency rate when the test insect was the Japanese water ant. Both test insects are species of ants. It was shown that a certain degree of control effect was maintained for at least 6 hours against both test insects.

[0096] Table 4: Basic test of control effect against black mountain ants and Japanese ants [Table 4]

[0097] Furthermore, tests were conducted using redback spiders (a type of spider), pill bugs, and woodlouses as test insects, and it was confirmed that the aerosol composition also exhibited a control effect against these test insects. [Industrial Applicability]

[0098] The present invention can be used to control pests such as mosquitoes.

Claims

1. An aerosol concentrate containing a pest control component that is volatile at room temperature, an anionic surfactant, and water; and a propellant.

2. 10. The aerosol composition of claim 1, which is used for ground spraying.

3. 2. The aerosol composition according to claim 1, wherein the ratio of the volume of the aerosol concentrate to the total volume of the aerosol concentrate and the propellant is 10% or more and 90% or less.

4. 2. The aerosol composition according to claim 1, wherein the aerosol concentrate further comprises an alcohol having 2 or 3 carbon atoms.

5. The aerosol composition according to any one of claims 1 to 4, wherein the aerosol concentrate further contains a nonionic surfactant.

6. An aerosol concentrate containing a pest control component that is volatile at room temperature, a surfactant, and water; A method for controlling pests, comprising spraying an aerosol composition comprising a propellant onto the ground.

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