How to repel creeping pests

Abstract

To provide a method for repelling creeping pests that repels creeping pests such as mite, avoiding killing of them as much as possible; and reduces, therefore, the number of remaining insects at its application site.SOLUTION: The present invention provides a method for repelling creeping pests. From a quantitative injection aerosol product filled with an aerosol composition containing a stock solution containing a repellent component of creeping pests and a propellant, the aerosol product is injected downwards.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a method for repelling crawling pests, and more particularly to a method for repelling crawling pests such as mites, thereby reducing the number of insect bodies remaining at an application site. [Background technology]

[0002] 2. Description of the Related Art Conventionally, methods for controlling insects and mites have been known in which an insecticidal or acaricidal composition is applied directly to the insects or mites or to their habitats (eg, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-10907 A Summary of the Invention [Problem to be solved by the invention]

[0004] The method described in Patent Document 1 is intended to control pests and mites by using an insecticidal / mite-killing composition. Therefore, the method for controlling pests and mites described in Patent Document 1 tends to leave dead bodies (insect bodies) of mites and the like at the application site, making it difficult to reduce mite allergens.

[0005] The present invention has been made in consideration of such conventional problems, and aims to provide a method for repelling crawling pests such as mites, which is less likely to be killed and thus repels them, thereby reducing the number of insect bodies remaining in the application area. [Means for solving the problem]

[0006] As a result of intensive research, the present inventors have found that spraying a fixed amount of an aerosol composition containing a repellent component downward using an aerosol product makes it difficult to kill crawling pests such as mites and can repel them, compared to spraying a similar amount using a pump product, etc., and have completed the present invention. That is, the method for repelling crawling pests of the present invention, which solves the above problems, mainly includes the following configurations.

[0007] (1) A method for repelling crawling pests, comprising spraying the aerosol composition downward from a metered dose aerosol product filled with the aerosol composition, the aerosol composition comprising a concentrate containing a repellent component for crawling pests and a propellant.

[0008] (2) The method for repelling crawling pests according to (1), wherein the amount of spray per time is 0.2 to 1.0 mL, and the treatment volume is 0.2 to 1.0 mL per tatami mat.

[0009] (3) The method for repelling crawling pests according to (1) or (2), wherein the aerosol composition is sprayed so that the average particle size (D50) of the sprayed aerosol composition is 15 to 95 μm.

[0010] (4) The method for repelling crawling pests according to any one of (1) to (3), wherein the repellent component is a pyrethroid compound, and the crawling pests are mites. Effect of the Invention

[0011] According to the present invention, a method for repelling crawling pests such as mites can be provided that is less likely to be killed and repels crawling pests, thereby reducing the number of insect bodies remaining in the application area. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic diagram of an experimental device for explaining a method for confirming the repellent effect. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] [How to repel creeping pests] The method for repelling crawling pests according to one embodiment of the present invention (hereinafter, simply referred to as the repelling method) is characterized in that the aerosol composition containing a concentrate containing a repellent component for crawling pests and a propellant is sprayed downward from a constant-dose aerosol product filled with the aerosol composition. Each of these will be described below. In the following description, the configuration of the constant-dose aerosol product (aerosol container, aerosol valve, spray member, etc.) is not particularly limited.

[0014] <Fixed-volume aerosol product> The fixed-dose aerosol product of this embodiment (hereinafter simply referred to as the aerosol product) comprises an aerosol container filled with an aerosol composition containing a concentrate and a propellant, an aerosol valve for fixed-dose spray (hereinafter simply referred to as the aerosol valve) attached to the aerosol container, and an ejection member attached to the aerosol container via the aerosol valve.

[0015] (aerosol container) The aerosol container is a pressure-resistant container for pressurizing and filling the aerosol composition. The aerosol container is a roughly cylindrical container having a space formed therein in which the aerosol composition is filled. An opening is provided at the top of the aerosol container. The opening is sealed by an aerosol valve described later.

[0016] The material of the aerosol container is not particularly limited. For example, the aerosol container may be made of various pressure-resistant metals, resins, glass, etc.

[0017] Stock solution The concentrate is a component that can constitute an aerosol composition together with a propellant. The concentrate is filled into an aerosol container when the aerosol composition is prepared. The concentrate contains a repellent component for crawling pests.

[0018] The repellent component for crawling pests is not particularly limited. Examples of repellent ingredients include various essential oil components such as peppermint oil, orange oil, fennel oil, cinnamon oil, clove oil, turpentine oil, eucalyptus oil, Japanese cypress oil, jasmine oil, neroli oil, peppermint oil, bergamot oil, butiglen oil, lemon oil, lemongrass oil, cinnamon oil, citronella oil, geranium oil, citral, l-menthol, citronellyl acetate, cinnamic aldehyde, terpineol, nonyl alcohol, cis-jasmone, limonene, linalool, 1,8-cineole, geraniol, α-pinene, p-menthane-3,8-diol, eugenol, menthyl acetate, thymol, benzyl benzoate, and benzyl salicylate; propylene glycol monopropyl ether, propylene glycol monobutyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, dipropylene glycol monobutyl ether, and dipropylene glycol monopropyl ether. glycol ethers such as ethanol dimethyl ether, ethylene glycol monoisobutyl ether, diethylene glycol monoisobutyl ether, diethylene glycol dibutyl ether, diethylene glycol dimethyl ether, and triethylene glycol dimethyl ether; dibasic acid esters such as dibutyl adipate; pyrethrins, allethrin, phthalthrin, resmethrin, furamethrin, fenothrin, permethrin, empenthrin, prallethrin, cyphenothrin, imiprothrin, transfluthrin, metofluthrin, profluthrin, mepafluthrin, and dimefluthrin; organophosphorus compounds such as fenitrothion, dichlorvos, chlorpyrifos-methyl, diazinon, and fenthion; carbamate compounds such as carbaryl and propoxur; methoprene, pyriproxyfen, methoxadiazone, fipronil, and amidoflumet.

[0019] Among these, the repellent component is preferably a pyrethroid compound or an essential oil component, from the viewpoint of being less likely to kill creeping pests and being easier to repel them, and more preferably contains fenothrin, transfluthrin, or menthyl acetate.

[0020] The content of the repellent component is not particularly limited as long as the repellent effect is sufficiently exhibited and the lethal effect is not easily exhibited. As an example, the content of the repellent component in the aerosol concentrate is preferably 1 mass / volume % or more, more preferably 5 mass / volume % or more. The content of the repellent component in the aerosol composition may be 100 mass / volume %. By the content of the repellent component being within the above range, the repellent method of the present embodiment is less likely to kill crawling pests and is easy to repel them.

[0021] In particular, when the repellent component is a pyrethroid compound or an essential oil component, the content of these in the aerosol composition is preferably 1 mass / volume % or more, more preferably 5 mass / volume % or more. The content of the pyrethroid compound or essential oil component in the aerosol composition may be 100 mass / volume %. By having the content of the pyrethroid compound or essential oil component in the above range, the repellent method of the present embodiment is less likely to kill crawling pests and is easier to repel them.

[0022] The stock solution may contain a solvent. The solvent is preferably contained in order to uniformly mix the repellent component and optional components. For example, the solvent may be a lower alcohol such as ethanol or propanol, a polyhydric alcohol such as glycerin or ethylene glycol, a linear, branched or cyclic paraffin, a petroleum such as kerosene, water, or an ester such as isopropyl myristate or hexyl laurate.

[0023] When a solvent is included, the content of the solvent in the concentrate is preferably 1% by mass / volume or more, more preferably 10% by mass / volume or more. The content of the solvent in the concentrate is preferably 99% by mass / volume or less, more preferably 90% by mass / volume or less. By having the content of the solvent within the above range, the concentrate is likely to be uniformly blended with the repellent component and optional components.

[0024] In addition to the repellent component and solvent, the concentrate may contain other optional components, such as nonionic, anionic or cationic surfactants, antioxidants such as butylhydroxytoluene, stabilizers such as citric acid and ascorbic acid, inorganic powders such as talc and silicic acid, bactericidal components, antifungal components, deodorizing components, aromatic components, fragrances, and colorants.

[0025] Propellant The propellant is a medium for spraying the concentrate, and is pressurized and filled into an aerosol container together with the concentrate. The propellant is not particularly limited. Examples of the propellant include hydrofluoroolefin, dimethyl ether (DME), liquefied petroleum gas (LPG), etc. The propellants may be used in combination.

[0026] In addition to the propellant, the aerosol composition of the present embodiment may contain a compressed gas such as carbon dioxide gas, nitrogen gas, compressed air, or oxygen gas in order to adjust the pressure of the aerosol composition.

[0027] The mixing ratio (volume ratio) of the concentrate of the aerosol composition to the propellant is preferably 1:99 to 70:30, more preferably 5:95 to 50:50, and even more preferably 10:90 to 30:70. By setting such a volume ratio, the aerosol product is likely to adjust the range of the average particle size of the sprayed aerosol composition to the range described below. As a result, the repellent method of the present embodiment is unlikely to kill crawling pests and is likely to repel them.

[0028] (Aerosol valve) The aerosol valve is a mechanism for taking out the aerosol composition filled in the aerosol container, and closes the opening of the aerosol container. The aerosol valve of this embodiment is also formed with a metered chamber for temporarily storing the aerosol composition taken out from the aerosol container. The volume of the metered chamber corresponds to the volume of the aerosol composition sprayed by one spray.

[0029] The volume of the metering chamber is not particularly limited. For example, the volume of the metering chamber is preferably 0.2 mL or more. Also, the volume of the metering chamber is preferably 1.0 mL or less. By having the volume of the metering chamber within the above range, the aerosol product is easily adjusted to have an average particle size range of the sprayed aerosol composition within the range described below. As a result, the repellent method of the present embodiment is less likely to kill crawling pests and is easy to repel them.

[0030] The aerosol valve comprises an opening / closing member for switching between communication and blocking between the metering chamber of the aerosol valve and the outside by the user operating the ejection member, a housing to which the opening / closing member is attached, and a mounting member for holding the housing at a predetermined position on the aerosol container. The opening / closing member also includes a stem that slides up and down in conjunction with the ejection member. The sliding of the stem switches between communication (ejection state) and blocking (non-ejection state) of the aerosol composition. The aerosol valve is formed with a housing hole for taking in the aerosol composition from the aerosol container, and a stem hole for sending the taken-in aerosol composition to the ejection member. The housing hole is formed in the housing. The stem hole is formed in the stem. The path from the housing hole to the stem hole constitutes an internal passage through which the aerosol composition passes.

[0031] The stem is a part attached to the aerosol valve and has an internal passage for delivering the aerosol composition taken up in the aerosol valve to the spray button. The internal passage is appropriately opened and closed by the stem rubber.

[0032] In a state where the concentrate and the propellant are filled, the internal pressure of the aerosol valve at 25°C is preferably 0.2 MPa or more, more preferably 0.25 MPa or more. The internal pressure of the aerosol valve at 25°C is preferably 0.8 MPa or less, more preferably 0.7 MPa or less. If the internal pressure of the aerosol valve is less than 0.2 MPa, the aerosol composition may drip from the nozzle after spraying. On the other hand, if the internal pressure of the aerosol valve is more than 0.8 MPa, the aerosol composition may leak from the aerosol container. The internal pressure of the aerosol valve can be measured, for example, at 25°C by connecting a PGM-E small pressure sensor (manufactured by Kyowa Electric Industry Co., Ltd.) attached to a WGA-710C instrument conditioner (manufactured by Kyowa Electric Industry Co., Ltd.) to the aerosol valve.

[0033] (Injection member) The ejection member is a member for ejecting the concentrate taken in from the aerosol container together with a propellant, and is formed with an ejection port for ejecting the aerosol composition.

[0034] The number, size and shape of the nozzles are not particularly limited. The number, size and shape of the nozzles can be appropriately adjusted, for example, so that the average particle size of the sprayed aerosol composition can be adjusted to the range described below. For example, the number of nozzles may be one or more than two. The size of the nozzle (the nozzle diameter) is preferably 0.2 mm or more, and more preferably 0.3 mm or more. The nozzle diameter is preferably 4.5 mm or less, and more preferably 3.0 mm or less. The shape (cross-sectional shape) of the nozzle may be a circle, an ellipse, a square, or various indefinite shapes.

[0035] The total cross-sectional area (total opening area) of the nozzle is not particularly limited. The total cross-sectional area is appropriately adjusted, for example, so that the average particle size of the sprayed aerosol composition can be adjusted to the range described below. For example, the total cross-sectional area is 0.03 mm 2 It is preferable that the thickness is 0.07 mm or more. 2More preferably, the total cross-sectional area is 16.0 mm 2 Preferably less than 7.5 mm 2 It is more preferable that the cross-sectional area is equal to or less than 100 mm. In this embodiment, the "total cross-sectional area" refers to the total cross-sectional area (opening area) of the nozzle holes. In other words, when there is one nozzle hole, the total cross-sectional area is the cross-sectional area of ​​the nozzle hole itself, and when there are two or more nozzle holes, the total cross-sectional area is the sum of the cross-sectional areas of all the nozzle holes.

[0036] In the aerosol product of this embodiment, when the user operates the spray button, the stem mechanism and the aerosol valve are actuated, and the metered chamber of the aerosol valve is connected to the outside, whereby a fixed amount of the aerosol composition in the metered chamber of the aerosol valve is taken out according to the pressure difference between the metered chamber of the aerosol valve and the outside, and is sprayed from the nozzle of the spray member.

[0037] The aerosol product of this embodiment is preferably adjusted so that the amount of spray per time is 0.2 mL or more. The aerosol product is preferably adjusted so that the amount of spray per time is 1.0 mL or less. By adjusting the amount of spray per time to be within the above range, the repellent method of this embodiment is less likely to kill crawling pests at the application site and is easier to repel them.

[0038] The repellent method of the present embodiment is characterized in that the aerosol composition is sprayed downward. In the present embodiment, "downward" is defined as a downward direction at an angle of 10 to 90° with respect to the floor surface and the horizontal direction. The angle at which the composition is sprayed is preferably 20 to 80°, and more preferably 30 to 70°. Conventionally, the aerosol composition has been sprayed upward, and the sprayed aerosol composition has been allowed to settle and applied to the application site. However, such a method has a problem in that it is difficult to adjust the amount of the composition to be applied to the application site. Therefore, the repellent method of the present embodiment has the advantage that the amount of the composition to be applied to the application site is easily adjusted by spraying the aerosol composition downward. As a result, the repellent method of the present embodiment is less likely to kill crawling pests and is easier to repel them.

[0039] In the spraying method of this embodiment, it is preferable to adjust the treatment volume at the application site by spraying downward. The treatment volume refers to the amount of spraying per tatami mat, and specifically, the treatment volume is preferably sprayed to be 0.2 mL or more per tatami mat. In addition, the treatment volume is preferably sprayed to be 1.0 mL or less per tatami mat. By adjusting the treatment volume within the above range, the repellent method of this embodiment is less likely to kill crawling pests and is easier to repel them. For example, when the treatment volume per tatami mat is 0.2 mL, an area of ​​up to 5 tatami mats can be treated with a 1 mL spray, and when the treatment volume per tatami mat is 0.5 mL, an area of ​​up to 2 tatami mats can be treated with a 1 mL spray.

[0040] The average particle diameter (D50) of the sprayed aerosol composition is not particularly limited. For example, the average particle diameter (D50) is preferably 15 μm or more, more preferably 20 μm or more. The average particle diameter (D50) is preferably 95 μm or less, more preferably 90 μm or less, and even more preferably 70 μm or less. By adjusting the average particle diameter (D50) within the above range, the repellent method of this embodiment is less likely to kill crawling pests and easier to repel them. In this embodiment, the average particle diameter (D50) means D50 (cumulative 50%) measured by a particle size distribution measuring device and analyzed by an automatic calculation processing device. Specifically, the average particle diameter (D50) refers to the average particle diameter at a position of 30 cm measured at 25°C using a laser particle size distribution analyzer (LDSA-1400A, manufactured by Tohnichi Computer Applications Co., Ltd.) with auto-start averaging (averaging count: 3, interval: 0.60 ms).

[0041] In the repelling method of the present embodiment, the above-mentioned aerosol product is used to spray (aerosol spray) the contents (aerosol composition) containing the concentrate and the propellant. In this case, compared to the case where the same concentrate is sprayed by a pump so that the amount of active ingredient per unit area is the same, crawling pests such as mites are less likely to be killed and repelled.

[0042] The repellent method of the present embodiment is characterized by using such an aerosol product and spraying it downward. This makes it difficult for the repellent method of the present embodiment to kill the crawling pests at the application site, and makes it easy to repel them. In addition, the amount of spray per time, the treatment volume, the average particle size (D50) of the sprayed aerosol composition, and the type of repellent component can be appropriately adjusted so that the repellent effect against crawling pests can be more easily obtained.

[0043] There is no particular limitation on the method for producing the aerosol product used in the repellent method of the present embodiment. As an example, the aerosol product can be produced by filling an aerosol container with a concentrate, closing the opening of the aerosol container with an aerosol valve, and pressurizing and filling a propellant through the nozzle or stem of the spray member.

[0044] The type of crawling pests to be repelled by the repelling method of this embodiment is not particularly limited. For example, crawling pests include mites such as Dermatophagoides pteronyssinus, Dermatophagoides farinae, Tyrophagus putrescentiae, and Cheyletiella pedunculata, as well as spiders, centipedes, ants, house mites, millipedes, pillbugs, woodlouse, termites, caterpillars, mites, lice, ticks, and bedbugs. Among these, the repelling method of this embodiment is preferably applied to mites, lice, and bedbugs, and more preferably to mites and lice. By applying the repelling method of this embodiment to these crawling pests, it is possible to repel these crawling pests without making them lethal. As a result, these crawling pests can be repelled from the application site, and the insect bodies are less likely to remain. Therefore, the repellent method of the present embodiment can suppress problems (such as mite allergies) caused by the residual bodies of these crawling pests. EXAMPLES

[0045] The present invention will be described in more detail below with reference to the following examples. The present invention is not limited to these examples. Unless otherwise specified, "%" means "% by mass" and "parts" means "parts by mass".

[0046] Details of the aerosol and pump products used are given below. Aerosol product 1 of Example 1: Spray member (nozzle diameter φ1.0 mm, one nozzle with a circular cross-sectional shape), aerosol valve (volume of metering chamber 0.2 mL) Aerosol product 2 of Example 2: Spray member (nozzle diameter φ0.6 mm, one nozzle with a circular cross-sectional shape), aerosol valve (volume of metering chamber 1.0 mL) Aerosol product 3 of Example 3: Spray member (nozzle diameter φ1.0 mm, one nozzle with a circular cross-sectional shape), aerosol valve (volume of metering chamber 0.2 mL) Aerosol product 4 of Example 4: Spray member (nozzle diameter φ0.3 mm, one nozzle with a circular cross-sectional shape), aerosol valve (volume of metering chamber 0.2 mL) Pump product 1 of Comparative Example 1: Pump injection member (nozzle diameter φ0.6 mm, one nozzle with a circular cross-sectional shape), pump valve (discharge capacity 1 mL)

[0047] <Differences in formulation types> The lethal effects against Dermatophagoides pteronyssinus were compared between an aerosol product and a pump product under conditions where the same amount of chemical treatment was used per unit area.

[0048] Example 1 A stock solution was prepared by dissolving fenothrin in 99.5% ethanol to a concentration of 35.0 w / v%. The obtained stock solution was filled into an aerosol container with a capacity of 59 mL, and an aerosol valve was attached. Then, a propellant (liquefied petroleum gas, saturated vapor pressure: 0.49 MPa (25°C)) was pressurized and filled so that the mixture ratio (volume ratio) of the stock solution to the propellant was 6.9 mL / 16.1 mL. An injection member was attached, and a 23 mL aerosol product was prepared as a composition (aerosol valve and injection member were used for aerosol product 1).

[0049] Comparative Example 1 A stock solution was prepared by dissolving fenothrin in 99.5% ethanol to a concentration of 0.315 w / v%. 250 mL of the obtained stock solution was filled into a 300 mL pump container, and a pump valve and a pump injection member were attached to prepare a pump product (pump product 1 was used as the pump valve and pump injection member).

[0050] The lethal effects of the aerosol products and pump products obtained in Example 1 and Comparative Example 1 were confirmed by the following evaluation method. The results are shown in Table 1.

[0051] (How to confirm lethal effect) Dermatophagoides pteronyssinus (approximately 100 to 300 mites) were placed in a waist-high petri dish (φ9 cm, height 6 cm) and placed near the center of the following space. Then, the aerosol product of Example 1 and the pump product of Comparative Example 1 were used to treat the mites using the following method, and the mites were left to stand for approximately 15 hours. The spray angle was 30° downward from the horizontal in both cases. Then, the number of dead test mites was counted. The test was performed twice. The average mortality rate (%) is shown in Table 1.

[0052] How to dispose of aerosol products The aerosol product prepared in Example 1 was placed in a 1 tatami room (dimensions: 0.91 m × 1.82 m, 1.66 m 2 The aerosol composition was sprayed once (0.2 mL) from a distance of 1 m (the shortest linear distance to the treatment surface on the high-waisted dish, the same applies below) onto the high-waisted dish placed on a table. The average particle size of the aerosol composition sprayed under these conditions (see below for the measurement method) was 42.8 μm. ·How to process pump products The pump product produced in Comparative Example 1 was sprayed once (1.0 mL) vertically from a distance of 30 cm into the above-mentioned high-waisted petri dish placed in a space of 50 cm square. The average particle diameter of the contents sprayed under these conditions (see below for the measurement method) was 162.0 μm. According to these treatment methods, in both Example 1 and Comparative Example 1, the average particle size per unit area was approximately 12 mg / m 2 The sample is treated with fenothrin so that the concentration becomes

[0053] (Method of measuring particle size) At 25°C, the average particle diameter (D50) was measured at a distance of 30 cm from the nozzle using a laser particle size distribution analyzer (LDSA-1400A, manufactured by Tohnichi Computer Applications Co., Ltd.) with auto-start averaging (averaging count 3 times, interval 0.60 ms).

[0054] [Table 1]

[0055] As shown in Table 1, the aerosol product of Example 1 was able to reduce the number of fatalities compared to the pump product of Comparative Example 1. This shows that even when the treatment concentration is the same, the fatality rate can be reduced by adopting aerosol spraying compared to pump spraying.

[0056] <Differences in particle size> The lethal effects against Dermatophagoides pteronyssinus were compared between aerosol products with different particle sizes, under conditions where the same amount of drug was applied per unit area.

[0057] Example 2 A stock solution was prepared by dissolving fenothrin in 99.5% ethanol to a concentration of 19.8 w / v%. The obtained stock solution was filled into an aerosol container with a capacity of 59 mL, and an aerosol valve was attached. Then, a propellant (liquefied petroleum gas, saturated vapor pressure: 0.49 MPa (25°C)) was pressurized and filled so that the mixture ratio (volume ratio) of the stock solution to the propellant was 4.6 mL / 18.4 mL. An injection member was attached, and a 23 mL aerosol product was prepared as a composition (aerosol valve and injection member were used for aerosol product 2).

[0058] Example 3 A stock solution was prepared by dissolving fenothrin in 99.5% ethanol to a concentration of 21.0 w / v%. The obtained stock solution was filled into an aerosol container with a capacity of 59 mL, and an aerosol valve was attached. Then, a propellant (liquefied petroleum gas, saturated vapor pressure: 0.49 MPa (25°C)) was pressurized and filled so that the mixture ratio (volume ratio) of the stock solution to the propellant was 11.5 mL / 11.5 mL. An injection member was attached, and a 23 mL aerosol product was prepared as the composition (aerosol valve and injection member were used for aerosol product 3).

[0059] Example 4 A stock solution was prepared by dissolving fenothrin in 99.5% ethanol to a concentration of 15.0 w / v%. The obtained stock solution was filled into an aerosol container with a capacity of 59 mL, and an aerosol valve was attached. Then, a propellant (liquefied petroleum gas, saturated vapor pressure: 0.49 MPa (25°C)) was pressurized and filled so that the mixture ratio (volume ratio) of the stock solution to the propellant was 16.1 mL / 6.9 mL. An injection member was attached, and a 23 mL aerosol product was prepared as the composition (aerosol valve and injection member were used for Aerosol Product 4).

[0060] The lethal effect of the aerosol products obtained in Examples 2 to 4 was confirmed by the following evaluation method. The results are shown in Table 2.

[0061] (How to confirm lethal effect) Dermatophagoides pteronyssinus (approximately 100 to 300 mites) were placed in a waist-high petri dish (φ9 cm, height 6 cm) and placed near the center of the following space. Then, the aerosol products of Examples 2 to 4 were used to treat the mites using the following methods, and the mites were left to stand for approximately 15 hours. The spray angle was 30° downward from the horizontal in all cases. Then, the number of dead test mites was counted. The test was performed twice. The results of the average mortality rate (%) are shown in Table 2.

[0062] How to dispose of aerosol products The aerosol product prepared in Example 2 was placed in a 2-tatami room (dimensions: 1.82 m × 1.82 m, 3.31 m 2 The aerosol products prepared in Examples 3 and 4 were sprayed once (1 mL) onto the above-mentioned high-waisted petri dish placed on a floor (1 tatami mat space) from a distance of 1 m. 2 The aerosol composition was sprayed once (0.2 mL) from a distance of 1 m onto the above-mentioned high-waisted petri dish placed on a tray. The average particle diameters of the aerosol compositions sprayed under these conditions (see below for the measurement method) were 20.9 μm in Example 2, 69.7 μm in Example 3, and 93.1 μm in Example 4. According to these treatment methods, in all of Examples 2 to 4, the average particle size per unit area was approximately 12 mg / m 2 The sample is treated with fenothrin so that the concentration becomes

[0063] (Method of measuring particle size) At 25°C, the average particle diameter (D50) was measured at a distance of 30 cm from the nozzle using a laser particle size distribution analyzer (LDSA-1400A, manufactured by Tohnichi Computer Applications Co., Ltd.) with auto-start averaging (averaging count 3 times, interval 0.60 ms).

[0064] [Table 2]

[0065] As shown in Table 2, it was found that when the average particle size (D50) was 20.9 to 69.7 μm, the mortality rate could be further reduced. In addition, it was found that the average mortality rate could be reduced more than that of the pump product of Comparative Example 1.

[0066] <About repellent effect> The repellent effects against Dermatophagoides pteronyssinus were compared between aerosol and pump products with different particle sizes, under the condition that the same amount of chemical treatment was achieved per unit area. FIG. 1 is a schematic diagram of an experimental device for explaining a method for confirming the repellent effect. As shown in FIG. 1, in a petri dish 1 with a diameter of 15 cm, a 9 cm square black paper 2, four 3.5 cm square cotton cloths (two pieces arranged lengthwise and widthwise, cotton cloths 3a to 3d) were placed in order from the bottom of the petri dish 1, a 2 cm square black paper 4 was placed in the center of each cotton cloth 3, and food (fresh medium 5) was placed on each black paper 4. Of the cotton cloths 3a to 3d, the contents were sprayed onto the cotton cloths 3a and 3c using the aerosol products of Examples 1 to 4 or the pump product of Comparative Example 1 by the following method. As a result, the four cotton cloths 3a to 3d were arranged alternately between those that had been repellent-treated and those that had not. In addition, about 500 to 1000 test insects (skin mites) were placed almost evenly in the four outer positions of the black paper 2. The specimens were left to stand overnight at 25°C and 75% RH, and the number of test insects that crawled onto the treated areas (cotton cloth 3a and cotton cloth 3c) and the untreated areas (cotton cloth 3b and cotton cloth 3d) were counted, and the repellency rate (%) was calculated using the following formula. The test was carried out twice. The average repellency rate (%) is shown in Table 3. Mite repellency rate (%) = 100 x (number of crawling mites in untreated area - number of crawling mites in treated area) / (number of crawling mites in untreated area)

[0067] (Method of disposing contents onto cotton cloth) The aerosol products prepared in Examples 1 to 4 or the pump product prepared in Comparative Example 1 were sprayed once. The aerosol products prepared in Examples 1, 3, and 4 were sprayed once in a 1 tatami room (dimensions: 0.91 m × 1.82 m, 1.66 m). 2 The aerosol product prepared in Example 2 was sprayed once (0.2 mL) from a distance of 1 m onto the cotton cloth 3a and cotton cloth 3c placed on a table (2 tatami mats in size, dimensions: 1.82 m × 1.82 m, 3.31 m). 2 The cotton cloth 3a and the cotton cloth 3c were placed on a 50 cm square space, and the cotton cloth 3a and the cotton cloth 3c were sprayed once (1.0 mL) from a distance of 1 m. The spray angle was 30° downward from the horizontal. The pump product prepared in Comparative Example 1 was sprayed once (1.0 mL) vertically from a height of 30 cm onto the cotton cloth 3a and the cotton cloth 3c placed on a 50 cm square space. By these treatment methods, in all of Examples 1 to 4 and Comparative Example 1, the amount of fluorine per unit area was about 12 mg / m 2 The sample is treated with fenothrin so that the concentration becomes

[0068] [Table 3]

[0069] As shown in Table 3, the aerosol products of Examples 1 to 4 and the pump product of Comparative Example 1 were both found to have a repellent effect on the test insects. For reference, the aerosol product of Example 1 was sprayed once upward (at an angle of 30° relative to the horizontal direction), and no repellent effect on the test insects was found. Here, referring to Tables 1 and 2 together, it was found that the aerosol products of Examples 1 to 4 had a reduced lethal effect and a sufficient repellent effect when sprayed downward toward the application area. Therefore, it was found that the aerosol products of Examples 1 to 4 were unlikely to kill the target pests at the application area, were able to repel them, and were unlikely to leave the insect bodies at the application area. On the other hand, it was found that the pump product of Comparative Example 1 was likely to kill the target pests, and there was a risk of the insect bodies remaining at the application area. [Explanation of symbols]

[0070] 1 Petri dish 2 Black Paper 3a~3d cotton cloth 4 Black Paper 5. Fresh medium P1~P4 Test locations for test insects

Claims

1. The present invention comprises an aerosol container filled with an aerosol composition containing a concentrate containing a repellent component for crawling pests and a propellant, an aerosol valve for spraying a fixed amount attached to the aerosol container, and a spray member attached to the aerosol container via the aerosol valve, The spray member is provided with a spray nozzle for spraying the aerosol composition, A constant-dose aerosol product having a nozzle diameter of 0.2 to 4.5 mm, The aerosol composition is sprayed downward at an angle of 20 to 80 degrees relative to the horizontal direction of the floor surface, thereby reducing the number of insect bodies remaining at the application site.

2. The amount of each injection is 0.2 to 1.0 mL. The method for repelling crawling pests according to claim 1, wherein the treatment volume is sprayed so as to be 0.2 to 1.0 mL per tatami mat.

3. 3. The method for repelling crawling pests according to claim 1 or 2, wherein the aerosol composition is sprayed so that the average particle size (D50) of the sprayed aerosol composition is 15 to 95 μm.

4. The repellent component is a pyrethroid compound, The method for repelling crawling pests according to any one of claims 1 to 3, wherein the crawling pests are mites.

Images