Method for controlling pests and mites, and aerosol for controlling pests and mites

Abstract

To provide a method for controlling insect pests and mites capable of lasting control effect on creeping insect pests and house dust mites for several days only by performing one push of an aerosol for controlling insect pests and mites in an indoor space.SOLUTION: There is provided a method for controlling insect pests and mites which performs injection treatment using an aerosol for controlling insect pests and mites obtained by filling an aerosol source liquid containing a control component and an organic solvent as well as a propellant in an aerosol vessel provided with a quantitative injection valve whose injection volume for one time is 1.0 to 5.0 mL. A control component is a compound of extremely low volatility having a vapor pressure of less than 1×10-4 mmHg at 30°C, and an aerosol source liquid has a specific gravity of 0.85 to 1.15 and the injection force of the aerosol for controlling insect pests and mites at an injection distance of 5 cm is 10 to 50 gf.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a method for controlling pests and mites, which involves spraying an aerosol for controlling pests and mites, the aerosol comprising an aerosol concentrate containing a control ingredient and an organic solvent, and a propellant, filled in an aerosol container equipped with a metered-dose spray valve with a single spray volume of 1.0 to 5.0 mL, and to the aerosol for controlling pests and mites. [Background technology]

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

[0003] (1) Fumigants and (2) total-discharge aerosols fall into the category of pharmaceuticals because they spray the agent to every corner of a room in one go, sealing the room for a specified period of time to increase the agent concentration, and people cannot enter the room during that time. Although these formulations are effective in exterminating crawling pests and house dust mites for 2 to 4 weeks after a single application, they are not suitable for frequent and easy use because of the time-consuming procedures required before use and the need to pay particular attention to the safety of the agent.

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

[0005] Thus, it has been considered difficult to develop a control agent for crawling pests or house dust mites that can be treated in the air and is classified as a quasi-drug.

[0006] Incidentally, Patent Document 1 discloses a method for exterminating crawling pests by evaporating an insecticide liquid containing an insecticidal component and a solvent into a space such as an indoor space or storage space, in which a compound having a specific structure is used as the solvent, and the insecticide liquid is evaporated little by little over time using a piezoelectric sprayer so that small particles of the insecticide liquid remain suspended in the space. This method of Patent Document 1 proposes exterminating cockroaches by continuously emitting a small amount of chemical into the space over a long period of time, similar to a liquid electric mosquito repellent. However, since the method targets cockroaches, which are several tens of times more resistant to chemicals than mosquitoes, it is necessary to use a powerful insecticidal component, which inevitably raises concerns about safety for the human body.

[0007] The present inventors previously conducted extensive research to develop a spatial treatment agent that is a quasi-drug and can control crawling pests and house dust mites. Instead of formulations that are used once every 2 to 4 weeks, such as (1) fumigants or (2) full-volume aerosol sprays, the inventors aimed to develop a formulation that would provide a single, metered spray treatment that would maintain its control effect for several days under practical conditions, i.e., a formulation that would basically be used once or twice a day, and that would be highly safe and usable even in situations where people are present. As a result, they invented an extremely useful "method for controlling insects and mites" (see Patent Document 2), which is effective not only against crawling pests and house dust mites, but also against flying pests on the day of spraying. In order to achieve a practical extermination effect against flying pests, this invention is designed so that the spray characteristics of the aerosol are such that the spray particles after spraying are formed into floating particles and adhesive particles that adhere to walls and settle on the floor, and preferably 30 to 80% of the total spray particles adhere to walls or settle on the floor within one hour after spraying. Furthermore, at the time of the invention of Patent Document 2, the spray volume of a metered dose spray valve was generally 0.2 to 0.4 mL, and it was generally believed that the formulation would be used several times (by pressing the spray button) per treatment.

[0008] Meanwhile, Patent Document 3 discloses an aerosol product for exterminating crawling pests using a metered dose valve and a method for exterminating crawling pests. This aerosol product is characterized by increasing the blending ratio of propellant contained in the aerosol container and lowering the vapor pressure of the solvent that dissolves the active ingredient, thereby slowing the evaporation rate of the solvent that forms the particles sprayed from the aerosol container, allowing the particles to be dispersed deep into gaps indoors. In other words, even though the method of Patent Document 3 is a metered dose spray treatment, it falls under (3) local treatment using a paint-type aerosol, and not spatial treatment. Therefore, even if a high extermination effect is achieved locally in some gaps, it does not effectively exterminate crawling pests throughout the entire indoor space. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-143868 [Patent Document 2] Patent No. 5517122 [Patent Document 3] Japanese Patent Application Publication No. 2018-12676 Summary of the Invention [Problem to be solved by the invention]

[0010] In light of this situation, the inventors of the present invention, based on the recognition that the spatial metered dose spray treatment based on Patent Document 2 is the most efficient method for controlling pests and mites, conducted research to improve its convenience and further enhance its efficacy, particularly against crawling pests and house dust mites. First, they adopted a recently developed metered dose spray valve with a spray volume of 1.0 to 5.0 mL, allowing the required amount of active ingredient to be sprayed with a single push. Based on this, they concluded that to improve the control effect of spatial treatment against crawling pests, particularly cockroaches, it is not enough to simply form the spray particles after spray into floating particles that float in the treatment space and adhesive particles that adhere to exposed areas within the treatment space. They also concluded that it is essential to make the adhesive particles more dominant than the spray characteristics of Patent Document 2, and further increase the proportion of adhesive particles that settle on floors rather than adhering to walls and other surfaces. The inventors then discovered that the specific gravity of the aerosol concentrate and the aerosol's propelling force are important factors that determine the behavior of adhesive particles related to sedimentation, and after repeated trial and error and testing, they were able to identify the optimal ranges for the specific gravity of the aerosol concentrate and the aerosol's propelling force, thereby completing the present invention.

[0011] An object of the present invention is to provide a method for controlling pests and mites, and an aerosol for controlling pests and mites, which can maintain a control effect against crawling pests and indoor dust mites for several days by simply pushing an aerosol for controlling pests and mites equipped with a metered dose valve with a capacity of 1.0 to 5.0 mL in an indoor space once. [Means for solving the problem]

[0012] The present invention has found that the following configurations are highly effective in achieving the above-mentioned object. [1] A method for controlling pests and mites, which involves spraying an aerosol for controlling pests and mites, the aerosol being prepared by filling an aerosol concentrate containing a control ingredient and an organic solvent, and a propellant, into an aerosol container equipped with a metered injection valve with a spray volume of 1.0 to 5.0 mL per injection, The control ingredient has a vapor pressure of 1×10 at 30°C. -4It is a hardly volatile compound with a vapor density of less than mmHg, The specific gravity of the aerosol concentrate is 0.85 to 1.15, The spray force of the aerosol for controlling pests and mites is 10 to 50 gf at a spray distance of 5 cm, In the spray treatment, the amount of the control component released into the air in the indoor space is 0.1 to 50 mg / m 3 and within one hour after spraying, 60% or more of the control ingredient is dispersed and adhered to the entire floor surface of the indoor space. [2] The pest and mite control aerosol has a filling amount of the aerosol concentrate of a, a filling amount of the propellant of b, a specific gravity of the aerosol concentrate of S, and a spray force of the pest and mite control aerosol of F, which satisfies the following formula (1): δ = [a / (a+b)] × S 2 × F (1) The method for controlling insects and mites according to [1], wherein δ defined as above is in the range of 1.0 to 30. [3] The aerosol for controlling pests and mites is represented by the following formula (2): 0.1 ≦ [a / (a+b)] ≦ 0.5 (2) The method for controlling pests and mites according to [2], which is configured to satisfy the above. [4] The aerosol for controlling pests and mites is represented by the following formula (3): 3.0 ≦ δ ≦ 15 (3) The method for controlling pests and mites according to [2] or [3], which is configured to satisfy the above. [5] The method for controlling insects and mites according to any one of [1] to [4], wherein the hardly volatile compound is at least one compound for controlling crawling insects selected from the group consisting of fenothrin, cyphenothrin, permethrin, cypermethrin, cyfluthrin, bifenthrin, fenpropathrin, tralomethrin, etofenprox, and dinotefuran. [6] The method for controlling insects and mites according to any one of [1] to [4], wherein the hardly volatile compound is at least one mite control compound selected from the group consisting of amidoflumet, benzyl benzoate, phenyl salicylate, benzyl salicylate, dibutyl sebacate, dipropyl sebacate, dibutyl adipate, diethyl phthalate, dibutyl phthalate, and p-menthane-3,8-diol. [7] The method for controlling insects and mites according to any one of [1] to [6], wherein the organic solvent is a lower alcohol having 2 to 3 carbon atoms. [8] The floor area of ​​the indoor space is 7.5 to 26.6 m 2 The method for controlling pests and mites according to any one of [1] to [7], [9] An aerosol for controlling pests and mites, which is obtained by filling an aerosol concentrate containing a control ingredient and an organic solvent, and a propellant, into an aerosol container equipped with a metered injection valve with a single injection volume of 1.0 to 5.0 mL, The control ingredient has a vapor pressure of 1×10 at 30°C. -4 It is a hardly volatile compound with a vapor density of less than mmHg, The specific gravity of the aerosol concentrate is 0.85 to 1.15, The spray force of the aerosol for controlling pests and mites is 10 to 50 gf at a spray distance of 5 cm, A single spray treatment through the metered spray valve releases the pest control component in an amount of 0.1 to 50 mg / m into the air of an indoor space. 3 When the aerosol concentrate is sprayed so as to achieve the above formula, 60% or more of the control ingredients will diffuse and adhere to the entire floor surface of the indoor space within one hour after spraying. [Effects of the Invention]

[0013] According to the method for controlling pests and mites and the aerosol for controlling pests and mites of the present invention, by simply spraying a specific aerosol for controlling pests and mites containing a hardly volatile compound into an indoor space with a single push, the control effect can be maintained for several days in the treated area, particularly against crawling pests and indoor dust mites.Since a convenient and effective method for controlling pests and mites and an aerosol for controlling pests and mites are provided, they are extremely practical. DETAILED DESCRIPTION OF THE INVENTION

[0014] In the present invention, the control component is a compound having a vapor pressure of 1×10 at 30°C. -4 A hardly volatile compound with a vapor density of less than mmHg is used. After one-push spray treatment of the pest and mite control aerosol of the present invention in an indoor space, such a control component settles mainly as adhesive particles on the floor surface and exhibits excellent control effect in the indoor space, particularly against crawling pests and house dust mites. In the present invention, the control effect refers to both the control effect based on the knockdown effect and the lethal effect as well as the repellent effect. Even if the control effect is low, there are many situations in which pest control can be achieved in practice as long as there is sufficient repellent effect.

[0015] That is, based on the recognition that the spatial metered dose spray treatment described in Patent Document 2 is the most efficient method for controlling pests and mites, the present invention aims to improve its convenience and further enhance its efficacy, particularly against crawling pests and house dust mites. First, a recently developed metered dose spray valve with a capacity of 1.0 to 5.0 mL is adopted, allowing the required amount of active ingredient to be sprayed with a single push. Furthermore, to improve the control effect of spatial treatment against crawling pests, particularly cockroaches, it is essential to increase the predominance of adhesive particles among the floating and adhesive particles formed from the spray particles after spraying, and further to increase the proportion of adhesive particles that settle to the floor rather than adhere to walls, etc. Furthermore, because the adhesive particles of the present invention penetrate into gaps and shadows during the process of settling, a flushing effect, causing cockroaches and other insects to flee from gaps and shadows, can be fully expected when a pyrethroid compound is used as the control ingredient.

[0016] The hardly volatile control component used in the present invention may be a compound for controlling crawling pests, mainly cockroaches, and / or a compound for controlling mites, mainly indoor dust mites. Examples of compounds for controlling crawling pests include pyrethroid compounds such as fenothrin, cyphenothrin, permethrin, cypermethrin, cyfluthrin, bifenthrin, fenpropathrin, tralomethrin, etofenprox, and imiprothrin, silicon compounds such as silafluofen, organophosphorus compounds such as dichlorvos and fenitrothion, carbamate compounds such as propoxur, neonicotinoid compounds such as dinotefuran, imidacloprid, and clothianidin, and others such as fipronil and indoxacarb. Among these, fenothrin, cyphenothrin, permethrin, cypermethrin, cyfluthrin, bifenthrin, fenpropathrin, tralomethrin, etofenprox, and dinotefuran are preferred. When optical isomers or geometric isomers based on asymmetric carbons exist in the acid component or alcohol moiety of the pyrethroid compound, it goes without saying that each of these isomers and any mixture thereof is also encompassed in the present invention.

[0017] Examples of compounds for controlling mites include amidoflumet, benzyl benzoate, phenyl salicylate, benzyl salicylate, dibutyl sebacate, dipropyl sebacate, dibutyl adipate, diethyl phthalate, dipropyl phthalate, dibutyl phthalate, p-menthane-3,8-diol, 3-iodo-2-propynyl butylcarbamate, fenothrin, and DEET, with amidoflumet, benzyl benzoate, phenyl salicylate, benzyl salicylate, dibutyl sebacate, dipropyl sebacate, dibutyl adipate, diethyl phthalate, dibutyl phthalate, p-menthane-3,8-diol, fenothrin, and DEET being preferred.

[0018] The method for controlling pests and mites of the present invention involves spraying a small, fixed amount of an aerosol concentrate containing a control ingredient and an organic solvent into space. The content of the control ingredient in the aerosol concentrate is preferably about 1.0 to 70 w / v%. If the content of the control ingredient in the aerosol concentrate is less than 1.0 w / v%, the desired control effect cannot be obtained, and if it exceeds 70 w / v%, it will be difficult to stabilize the liquid properties of the aerosol concentrate.

[0019] In the present invention, in addition to the above-mentioned hardly volatile pest control component, a spray having a vapor pressure of 2×10 at 30° C. is added so that a certain amount of spray particles remain suspended in the air after the space spray treatment and can exert a pest control effect against flying pests. -4 mmHg or more, 1 × 10 -2 A room-temperature volatile control component having a viscosity of less than mmHg may also be added. Examples of such room-temperature volatile control components include metofluthrin, profluthrin, transfluthrin, empenthrin, telallethrin, and furametrin. It has been recognized that when a room-temperature volatile control component is partially attached to a floor or wall surface together with a hardly volatile control component, it can synergistically enhance the control effect against crawling pests and / or house dust mites. Taking into consideration vapor pressure, stability, basic insecticidal efficacy, etc., metofluthrin, profluthrin, and transfluthrin are preferred room-temperature volatile control components. When optical isomers or geometric isomers based on asymmetric carbons exist in the acid component or alcohol moiety of these compounds, the present invention naturally encompasses each of these isomers and any mixture thereof.

[0020] In the present invention, an organic solvent is blended to dissolve the above-mentioned hardly volatile pest control component, thereby forming an aerosol concentrate. Examples of such organic solvents include lower alcohols having 2 to 3 carbon atoms, hydrocarbon solvents such as normal paraffin and isoparaffin, ester solvents such as isopropyl myristate (IPM) and hexyl laurate, glycol ether solvents having 3 to 10 carbon atoms, and ketone solvents. However, lower alcohols having 2 to 3 carbon atoms, such as ethanol and isopropanol (IPA), are preferred.

[0021] The method for controlling pests and mites of the present invention uses a pest and mite control aerosol containing a hardly volatile control component, and sprays the aerosol into an indoor space at a volume of 1.0 to 5.0 mL per spray, thereby maintaining the control effect against crawling pests and / or house dust mites in the treated area for several days. The size of the indoor space is 18.8 to 33.3 m, which is equivalent to a room of 4.5 to 8 tatami mats in size. 3 (Area 7.5~13.3m 2 and a height of 2.2 to 3.0 m).

[0022] After spraying, spray particles are formed as floating particles that float in the treatment space or as adhesive particles that adhere to exposed areas within the treatment space. However, the present inventors conducted research to further emphasize adhesive particles and, among the adhesive particles, to increase the proportion of adhesive particles that settle to floor surfaces rather than adhering to walls and other surfaces. As a result, the present inventors discovered that the specific gravity of the aerosol concentrate and the aerosol spray force are important factors that determine the behavior of adhesive particles related to settling, and identified optimal ranges for these. Specifically, they confirmed that if the specific gravity of the aerosol concentrate is 0.85 to 1.15, preferably 0.89 to 1.10, and the spray force of the spray treatment is 10 to 50 gf, preferably 15 to 35 gf, at a spray distance of 5 cm, 60% or more of the control ingredient settles and adheres to the entire floor surface of the indoor space within one hour after spraying, thereby providing excellent control effects against crawling pests and mites. Regarding the statement that the pest control ingredient "settles and adheres over the entire floor surface," there is no need to check each time whether the ingredient actually settles and adheres over the entire floor surface. As long as the aerosol is sprayed within the treatment space in a manner consistent with the spirit of the present invention, even if there is some unevenness or bias in the state of settling and adhering of the sprayed pest control ingredient to the floor surface, the ingredient can be considered to have settled and adhered over the entire floor surface, and this assumption is practically acceptable. If the specific gravity of the aerosol concentrate is less than 0.85, the amount of sprayed particles adhering to the floor surface tends to be insufficient. Conversely, if the specific gravity of the aerosol concentrate exceeds 1.15, the spray particles will settle too quickly, resulting in insufficient diffusion over the entire floor surface. Furthermore, if the spraying force of the spraying treatment is less than 10 gf, the spraying force will be insufficient and diffusion over the entire floor surface will tend to be insufficient. Even if the spraying force exceeds 50 gf, good diffusion will not be achieved. The propelling force of the aerosol can be adjusted appropriately by changing the formulation of the aerosol concentrate, the internal pressure of the aerosol, the shape of the nozzle, and the like.

[0023] Furthermore, when the filling amount of the aerosol concentrate is a, the filling amount of the propellant is b, the specific gravity of the aerosol concentrate is S, and the spray force of the aerosol for controlling pests and mites is F, the following formula (1) is satisfied: δ = [a / (a+b)] × S2 × F (1) The value of δ defined by the above formula is preferably in the range of 1.0 to 30, and more preferably in the range of 3.0 to 15.

[0024] If δ is within the range of 1.0 to 30, a sufficient amount of the control ingredient will be uniformly dispersed across the entire floor surface when the spray particles settle, resulting in a favorable control effect. The reason the control ingredient is uniformly dispersed across the entire floor surface is thought to be that the initial velocity of the spray particles sprayed from the pest and mite control aerosol is appropriate, allowing the spray particles to quickly reach every corner of the indoor space after spraying. If δ is less than 1.0, the amount of the control ingredient adhering to the floor surface may be insufficient. On the other hand, if δ exceeds 30, the spread across the entire floor surface may be insufficient. Therefore, if δ is outside the range of 1.0 to 30, a satisfactory control effect may not be achieved.

[0025] The pest and mite control aerosol has a volume ratio [a / (a+b)] of the filling amount a of the aerosol concentrate to the total volume (a+b) of the pest and mite control aerosol, which satisfies the following formula (2): 0.1 ≦ [a / (a+b)] ≦ 0.5 (2) It is preferable to satisfy the above. If the volume ratio is within the above range, a sufficient amount of the control ingredient will be dispersed evenly over the entire floor surface. If the volume ratio is less than 0.1 and there is too much propellant, the amount of the control ingredient adhering to the floor surface will be insufficient. On the other hand, if the volume ratio exceeds 0.5, the spray particles will settle too quickly and will not be dispersed sufficiently over the entire floor surface.

[0026] The pest and mite control aerosol used in the present invention is sprayed in small amounts, eliminating the need for special consideration of fire hazards. However, to minimize fire hazards, a water-based formulation can be used. In this case, the amount of water contained in the aerosol concentrate is preferably approximately 20 to 70% (v / v). A small amount of a nonionic surfactant may be added as a solubilizing aid, provided that 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. Ethers are particularly suitable.

[0027] In addition to the above components, the aerosol concentrate may also contain, as appropriate, antifungal agents, antibacterial agents, and disinfectants for fungi and molds, as well as fragrances, deodorizers, stabilizers, antistatic agents, antifoaming agents, excipients, etc. Examples of antifungal agents, antibacterial agents, and disinfectants include hinokitiol, 2-mercaptobenzothiazole, 2-(4-thiazolyl)benzimidazole, 5-chloro-2-methyl-4-isothiazolin-3-one, triforine, 3-methyl-4-isopropylphenol, and ortho-phenylphenol. Examples of fragrances include, but are not limited to, aromatic components such as orange oil, lemon oil, lavender oil, peppermint oil, eucalyptus oil, citronella oil, lime oil, yuzu oil, jasmine oil, cypress oil, green tea essential oil, limonene, α-pinene, linalool, geraniol, phenylethyl alcohol, amyl cinnamic aldehyde, cumin aldehyde, and benzyl acetate, as well as fragrance components containing leaf alcohol or leaf aldehyde, known as the "scent of greenery."

[0028] The propellants used in the present invention include liquefied gases such as liquefied petroleum gas (LPG), dimethyl ether, and hydrofluorocarbons, and compressed gases such as nitrogen gas, carbon dioxide gas, nitrous oxide, and compressed air, and one or more of these can be used as appropriate. The propellant can be selected appropriately taking into consideration the adhesion rate of the spray particles to the floor or wall, but propellants mainly containing LPG are usually easy to use. It is preferable to use the propellant with a gauge pressure (20°C) adjusted to 0.1 to 0.7 MPa.

[0029] The above-mentioned pest and mite control aerosol is equipped with a metered-dose valve with a single spray volume of 1.0 to 5.0 mL, and is used for indoor spray treatment. Conventionally, the spray volume of metered-dose valves was 0.2 to 0.4 mL, but the increased volume of the metered-dose valve used in the present invention allows the required amount of active ingredient to be sprayed with a single push. The shapes of the nozzle, nozzle, container, etc. can be selected appropriately depending on the application and purpose of use. For example, it can be designed as a tabletop type with a button that sprays when pressed from above and a nozzle that faces diagonally upward, or as a small, portable container.

[0030] In the method for controlling pests and mites of the present invention, the thus obtained aerosol for controlling pests and mites is sprayed into the air in an indoor space at a single spray volume of 1.0 to 5.0 mL, preferably 1.0 to 3.0 mL, so that the amount of the control component released into the air is 0.1 to 50 mg / m 3 , preferably 0.5 to 50 mg / m 3 The volume equivalent to a room of 4.5 to 8 tatami mats is 18.8 to 33.3 m 3 (Area 7.5~13.3m 2 When spraying indoors (at a height of 2.2 to 3.0 m), a single spray of the aerosol concentrate usually results in an airborne release of 0.1 to 50 mg / m 3 However, in larger indoor spaces, the amount of pest control component released into the air is 0.1 to 50 mg / m depending on the volume of the indoor space. 3By spraying the aerosol concentrate multiple times so that the volume is equal to the volume of the indoor space, the same pest control effect can be achieved regardless of the size of the indoor space. For example, the volume of a room of 9 to 16 tatami mats is 37.6 to 66.6 m. 3 (Area 15~26.6m 2 When spraying indoors at a height of 2.2 to 3.0 m, spraying the aerosol concentrate twice will release 0.1 to 50 mg / m of the control ingredient into the air. 3 The frequency of use of this pest and mite control aerosol is basically once every 1 to 2 days, and if it is applied so that the amount of control ingredient released is within the above range, the control effect against crawling pests and / or house dust mites can be maintained for several days. In addition, by using it in combination with a control ingredient that is volatile at room temperature, it is also possible to impart control effect against flying pests.

[0031] The method for controlling pests and mites of the present invention is particularly effective for controlling cockroaches such as the German cockroach, the American cockroach, and the Siberian cockroach, ants, bedbugs such as lectiles and nettle bugs, crawling pests such as the red flour beetle, the maize weevil, the serpent beetle, the pill bug, and the woodlouse, and house dust mites such as Tyrophagus putrescentiae, Dermatophagoides farinae, Dermatophagoides pteronyssinus, and Cheyletidae. However, the method is not limited to these crawling pests and mites, and is also fully applicable to controlling various pests that fly indoors and cause harm or discomfort to humans, such as mosquitoes such as Culex pipiens and Aedes albopictus, midges, house flies, moth flies, black flies, horseflies, wasps, and leafhoppers. [Example]

[0032] The method for controlling insect pests and mites and the aerosol for controlling insect pests and mites of the present invention will be described in more detail based on specific examples and test examples, but the present invention is not limited to these.

[0033] Example 1 An aerosol concentrate was prepared by dissolving 53 w / v% fenothrin and 0.7 w / v% metofluthrin in ethanol. 12 mL of this aerosol concentrate (a) and 18 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 1.0 mL, so that the volume ratio of the aerosol concentrate [a / (a+b)] was 0.4, to obtain the aerosol for controlling pests and mites of Example 1. The specific gravity of this aerosol concentrate was 0.93, and the spray force of this aerosol at a spray distance of 5 cm was 26 gf. The δ was also 9.0.

[0034] Nearly sealed volume of 25m 3 Room (equivalent to a 6-tatami room, area 10m 2 ) in the center of the floor, a single shot of the insect and mite control aerosol was sprayed at a slight angle upward. The adhesion rate (%) of the control ingredient to the floor surface was calculated from the results of gas chromatography analysis described below and the amount of control ingredient released from the aerosol. As a result, it was confirmed that 72% of the total spray particles sprayed by this spray treatment (i.e., 72% of the amount of control ingredient released) settled and adhered to the entire floor surface within 1 hour after spray treatment. For several days after spray treatment, it exhibited excellent control effects against crawling pests such as cockroaches, ants, and beetles, and also repelled house dust mites. Furthermore, in a nearly sealed container with a volume of 50m 3 Room (equivalent to a 12-tatami room, area 20m 2 ) and sprayed the insect and mite control aerosol twice at a slight angle upwards. 3 As in the case of the room, it was also confirmed that the product was effective in controlling creeping pests.

[0035] [Examples 2 to 24, Comparative Examples 1 to 4] Various pest and mite control aerosols shown in Table 1 were prepared in accordance with Example 1. For the pest and mite control aerosols of Examples 2 to 21, 23 to 24, and Comparative Examples 1, 3 and 4, an aerosol container with a metered spray valve and a spray volume of 1.0 mL was used, for the pest and mite control aerosol of Example 22, an aerosol container with a metered spray valve and a spray volume of 2.2 mL was used, and for the pest and mite control aerosol of Comparative Example 2, an aerosol container with a metered spray valve and a spray volume of 0.4 mL was used.

[0036] [Table 1]

[0037] The following tests were carried out using the pest and mite control aerosols of Examples 1 to 24 and Comparative Examples 1 to 4. For house dust mites, the control effect was first examined, and if the control effect was poor, the repellent effect was evaluated. The test results are summarized in Table 2.

[0038] (1) Effective against creeping pests A total of 12 20 x 20 cm glass plates (four each for German cockroaches, American cockroaches, and Japanese wood ants) were enclosed to create a chamber with a volume of 25 m. 3 Room (area 10m 2 The glass plates were placed at the four corners of a room, and a plastic ring approximately 20 cm in diameter was placed on each plate. A designated test insect (five female German cockroaches, five American cockroach larvae, and five Japanese wood ants) was released into each ring and allowed to roam freely. A single shot of the test aerosol (volume: 1.0 mL for Examples 1-21, 23-24, Comparative Examples 1, 3-4, 2.2 mL for Example 22, 0.4 mL for Comparative Example 2) was sprayed diagonally upward in the center of the room. After 24 hours of exposure to the insecticide, the glass plates and the rings containing the test insects were moved to another room, where they were fed. The mortality rate of the test insects was determined after another 24 hours.

[0039] (2) Effectiveness against indoor dust mites Eight waist-high petri dishes, each 9 cm in diameter and 6 cm in height (four each for Dermatophagoides farinae and Tyrophagus putrescentiae), are enclosed to form a 25 m 3 Room (area 10m 2 The test aerosol was sprayed in one shot at a slight angle upwards in the centre of the room. After leaving the aerosol to be exposed to the agent for 24 hours, the mortality rate of the test mites was calculated.

[0040] (3) Repellent effect against indoor dust mites In the above-mentioned "(2) Efficacy against House Dust Mites" test, cotton cloths approximately 4 cm in diameter were placed in the four corners of a room in place of test mites, and a single shot of the test aerosol was sprayed. 24 hours after spraying, the cotton cloths were removed and placed in a 4 cm diameter Petri dish, and 50 mg of attractant medium was placed in the center of the dish. Separately, approximately 10,000 test house dust mites or Tyrophagus putrescentiae along with the medium were released into a 9 cm diameter Petri dish, and the previously prepared 4 cm diameter Petri dish was placed in the center of this 9 cm diameter Petri dish. Similarly, an untreated control was prepared using cotton cloth that had not been treated with the test aerosol. After 24 hours, the number of mites that had invaded the cotton cloth was counted, and the mite repellency was calculated according to the following formula. Mite repellency rate (%) = [(Number of mites invaded in the untreated area - Number of mites invaded in the treated area) / Number of mites invaded in the untreated area] × 100

[0041] (4) Adhesion rate of the control ingredient to the floor Closed volume: 25m 3 Room (area 10m 220 x 20 cm glass plates were placed evenly across the floor of the room at 6-8 locations, and the test aerosol was sprayed in one shot from the center of the room at a slight upward angle. One hour after spraying, all glass plates were removed, and the adhering pesticide was washed with acetone and analyzed by gas chromatography. Based on the analytical values ​​obtained, the ratio of the pesticide that had settled and adhered to the floor surface within one hour of spraying to the theoretical total amount of pesticide sprayed (floor adhesion rate) was calculated. In addition, the variation in the amount of pesticide that adhered to the glass plates was analyzed, and the uniformity of the spray droplets was evaluated. The results were ranked on a four-point scale (A, B, C, D) in order of best to worst dispersion uniformity.

[0042] [Table 2]

[0043] As a result of the test, it was confirmed that, according to the pest and mite control method of the present invention using the pest and mite control aerosols of Examples 1 to 24, the spray particles spread almost uniformly over the entire floor surface, and 60% or more of the control ingredient settled and adhered to the floor surface within one hour after spraying. Furthermore, it was confirmed that when the pest and mite control aerosols of Examples 1 to 16 and 20 to 24, which contained a compound for controlling crawling pests as a non-volatile control ingredient, were used, they exhibited excellent control effects against both crawling pests and house dust mites. It was confirmed that when the pest and mite control aerosols of Examples 17 to 19, which contained a compound for controlling mites as a non-volatile control ingredient, were used, they exhibited excellent control effects against house dust mites.

[0044] In contrast, Comparative Examples 1 to 4 failed to provide sufficient control effects against either crawling pests or house dust mites. Comparative Example 1 used an aerosol containing only a room-temperature volatile pyrethroid compound such as empenthrin as the control ingredient, which likely resulted in low floor adhesion and, as a result, low control efficacy. Comparative Example 2 used a metered-dose spray valve with a spray volume of 0.4 mL, which likely resulted in the required amount of control ingredient not being sprayed with a single push, likely resulting in low control efficacy. In Comparative Examples 3 and 4, where the specific gravity of the aerosol concentrate was outside the range of 0.85 to 1.15 specified in the present invention, the poor dispersion uniformity of the spray particles was likely the cause of the reduced control efficacy. [Industrial Applicability]

[0045] The method for controlling pests and mites and the aerosol for controlling pests and mites of the present invention can be used to control a wide range of pests and mites, not just indoors.

Claims

1. An aerosol for controlling pests and mites, comprising an aerosol concentrate containing a 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 1.0 to 5.0 mL, The pest is a creeping pest, The control component comprises fenothrin and / or permethrin, The specific gravity of the aerosol concentrate is 0.85 to 1.15; The aerosol for controlling pests and mites has a spray force of 10 to 35 gf at a spray distance of 5 cm.

2. An aerosol for controlling pests and mites as described in Claim 1, wherein the control component consists solely of fenothrin and / or permethrin.

3. An aerosol for controlling pests and mites, comprising an aerosol concentrate containing a 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 1.0 to 5.0 mL, The pest is a creeping pest, The control component includes at least one selected from the group consisting of phenothrin, permethrin, benzyl benzoate, and dibutyl sebacate, The specific gravity of the aerosol concentrate is 0.85 to 1.15; The spray force of the aerosol for controlling pests and mites is 10 to 35 gf at a spray distance of 5 cm, When the filling amount of the aerosol concentrate is a, the filling amount of the propellant is b, the specific gravity of the aerosol concentrate is S, and the spray force of the pest and mite control aerosol is F, the following formula (1) is obtained: δ = [a / (a+b)] × S ２ × F ・・・ (1) is configured so that δ defined as is in the range of 6.7 to 30, The aerosol for controlling pests and mites is configured so that the volume ratio [a / (a+b)] of the filling amount a of the aerosol concentrate to the total volume (a+b) of the aerosol for controlling pests and mites is in the range of 0.1 to 0.

4.

4. An aerosol for controlling pests and mites as described in Claim 3, wherein the control component contains benzyl benzoate and / or dibutyl sebacate.

5. 5. The aerosol for controlling pests and mites according to claim 1, wherein the organic solvent is a lower alcohol having 2 to 3 carbon atoms.

6. A method for controlling pests and mites, which comprises spraying an aerosol for controlling pests and mites as described in any one of claims 1 to 5.

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