JP2019104708A - Method for repelling creeping pests - Google Patents

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

  The present invention relates to a method for repellent insect pests. More specifically, the present invention relates to a method for repellent insect pests to reduce the number of insect bodies remaining at application sites by repellent insect pests such as mites.

  Heretofore, methods for controlling pests and acarids which apply an insecticidal and acaricidal composition directly to pests and acarids or to these habitats are known (for example, Patent Document 1).

JP, 2001-10907, A

  The method described in Patent Document 1 intends to control pests and mites by using an insecticidal and acaricidal composition. Therefore, according to the pest and mite control method described in Patent Document 1, carcasses (insects) such as ticks easily remain at the application site, and it is difficult to reduce mite allergens.

  The present invention has been made in view of such conventional problems, and it is difficult to kill spider pests such as mites, and by repelling, to reduce the number of insect bodies remaining at the application site. The purpose is to provide a repelling method.

  As a result of intensive investigations, the present inventors inject a fixed amount of an aerosol composition containing a repellent component downward using an aerosol product so that a similar throughput can be achieved using a pump product etc. As compared with the case where it did, it found that it was hard to kill and repels moth pests, such as ticks, and completed the present invention. That is, the following configuration is mainly included in the method for repellent insect pests of the present invention for solving the above-mentioned problems.

  (1) A method for repellent insect pests, wherein the aerosol composition is jetted downward from a metered-dose aerosol product filled with an aerosol composition containing an undiluted solution containing repellent components of moth pests and a propellant.

  (2) A repellant of the pest according to (1), wherein the injection amount per injection is 0.2 to 1.0 mL and the treatment volume is injected to be 0.2 to 1.0 mL per tatami Method.

  (3) The method for repellent insect pests according to (1) or (2), wherein the average particle diameter (D50) of the injected aerosol composition is 15 to 95 μm.

  (4) The repellent component according to any one of (1) to (3), wherein the repellent component is a pyrethroid compound, and the pest is a mite.

  According to the present invention, it is possible to provide a method for repellent insect pests for reducing the number of insect bodies remaining at the application site by making it difficult to kill insect pests such as mites and repelling them.

FIG. 1 is a schematic view of an experimental apparatus for explaining a method of confirming the repelling effect.

[How to avoid insect pests]
The method for repelling moth insect pests according to an embodiment of the present invention (hereinafter, also simply referred to as repellent method) comprises a metered-dose aerosol product filled with an aerosol composition containing a stock solution containing repellent components of moth insect pests and a propellant. , Spraying the aerosol composition downward. Each of these will be described below. In the following description, the configuration (aerosol container, aerosol valve, injection member, etc.) of the quantitative injection type aerosol product is not particularly limited.

<Quantitative injection type aerosol product>
The metered-dose aerosol product (hereinafter also referred to simply as aerosol product) of the present embodiment comprises an aerosol container filled with an aerosol composition containing a stock solution and a propellant, and an aerosol valve for metered-quantity jet attached to the aerosol container , Simply referred to as an aerosol valve), and an injection member attached to the aerosol container via the aerosol valve.

(Aerosol container)
The aerosol container is a pressure-resistant container for pressure-filling the aerosol composition. An aerosol container is a substantially cylindrical container in which the space where an aerosol composition is filled is formed. An opening is provided at the top of the aerosol container. The opening is sealed by an aerosol valve described later.

  The material of the aerosol container is not particularly limited. As an example, the aerosol container may be made of various metals, resin, glass, etc. having pressure resistance.

Undiluted solution Undiluted solution is a component which can constitute an aerosol composition with a propellant. The stock solution is loaded into the aerosol container when the aerosol composition is prepared. The stock solution contains a repellent component of an insect pest.

  There are no particular limitations on the repellent component of the insect pest. For example, the repellent ingredients are peppermint oil, orange oil, fennel oil, clove oil, clove oil, turpentine oil, eucalyptus oil, hiba oil, jasmine oil, neroli oil, peppermint oil, bergamot oil, buchigren oil, lemon oil , Lemon grass 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- Various essential oil components such as pinene, p-menthan-3,8-diol, eugenol, menthyl acetate, thymol, benzyl benzoate, benzyl salicylate, propylene glycol monopropyl ether, propylene glycol Glycol ethers such as dibutyl monobutyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, dipropylene glycol dimethyl ether, ethylene glycol monoisobutyl ether, diethylene glycol monoisobutyl ether, diethylene glycol diisobutyl ether, diethylene glycol dibutyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, Dibasic acid esters such as dibutyl adipate, pyrethrin, allethrin, phthalthrin, resmethrin, flamethrin, phenothrin, permethrin, empentrin, praguethrin, cypenothrin, imiprothrin, transfluthrin, methoflthrin, mefafluthrin, dimefluthrin, etc. Lloyd compounds, organophosphorus compounds such as fenitrothion, dichlorvos, chlorpyrifos methyl, diazinone and fenthion, carbamate compounds such as carbaryl and propoxle, methoprene, pyriproxyfen, methoxadiazon, fipronil, amidoflumetho and the like.

  Among these, the repellent component is preferably a pyrethroid compound or an essential oil component from the viewpoint of being hard to kill and repel moth insect pests, and it is more preferable to include phenothrin, transfluthrin, and menthyl acetate.

  The content of the repellent component is not particularly limited as long as the repellent effect is sufficiently expressed and the lethal effect is hardly expressed. If an example is given, it is preferable that it is 1 mass / volume% or more in aerosol undiluted | stock solution, and, as for content of a repellent component, it is more preferable that it is 5 mass / volume% or more. Further, the content of the repellent component may be 100% by mass / volume in the aerosol composition. When the content of the repellent component is in the above-described range, the repellent method of the present embodiment is hard to kill the insect pest and easily repellent.

  In particular, when the repellent component is a pyrethroid compound or an essential oil component, the content thereof in the aerosol composition is preferably 1% by mass or more, and more preferably 5% by mass or more. . In addition, the content of the pyrethroid compound and the essential oil component may be 100% by mass / volume in the aerosol composition. When the content of the pyrethroid compound and the essential oil component is in the above range, the repelling method of the present embodiment is less likely to kill the leprosy pest and easily repelled.

  The stock solution may contain a solvent. A solvent is suitably contained, for example, in order to mix | blend a repellent component and arbitrary components uniformly. For example, the solvent may be lower alcohol such as ethanol or propanol, polyhydric alcohol such as glycerin or ethylene glycol, linear, branched or cyclic paraffins, petroleum such as kerosene, water, isopropyl myristate, laurin Esters such as hexyl acid;

  In the case where a solvent is contained, the content of the solvent in the stock solution is preferably 1% by mass / volume or more, and more preferably 10% by mass or more. Further, the content of the solvent in the stock solution is preferably 99% by mass or less, and more preferably 90% by mass or less. When the content of the solvent is in the above range, the stock solution is likely to be uniformly blended with the repellent component and the optional component.

  The stock solution may contain appropriate optional components in addition to the repellent component and the solvent. Optional components include, for example, 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, germicidal components, It is an antifungal ingredient, a deodorant ingredient, an aroma ingredient, a fragrance, a pigment and the like.

Propellant The propellant is a medium for injecting the stock solution, and is pressure-filled into the aerosol container together with the stock solution. The propellant is not particularly limited. As an example, the propellant is hydrofluoroolefin, dimethyl ether (DME), liquefied petroleum gas (LPG) and the like. Propellants may be used in combination.

  In the aerosol composition of the present embodiment, in addition to the above-mentioned propellant, compressed gas such as carbon dioxide gas, nitrogen gas, compressed air, oxygen gas, etc. may be used in combination to adjust the pressure of the aerosol composition. .

  The mixing ratio (volume ratio) of the undiluted solution of the aerosol composition to the propellant is preferably 1:99 to 70:30, more preferably 5:95 to 50:50, and 10:90 to 30:70. It is further preferred that By setting it as such a volume ratio, as for the aerosol product, it is easy to be adjusted by the range which the range of the average particle diameter of the injected aerosol composition mentions later. As a result, according to the repelling method of the present embodiment, it is difficult to kill and easily repel moth pests.

(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. Moreover, the aerosol valve of this embodiment is provided with a metering chamber for temporarily storing the aerosol composition taken out of the aerosol container. The volume of the metering chamber corresponds to the volume of the aerosol composition sprayed by one injection.

  The volume of the metering chamber is not particularly limited. As an example, the volume of the metering chamber is preferably 0.2 mL or more. In addition, the volume of the metering chamber is preferably 1.0 mL or less. When the volume of the metering chamber is in the above range, the aerosol product is likely to be adjusted to the range described later of the average particle size of the jetted aerosol composition. As a result, according to the repelling method of the present embodiment, it is difficult to kill and easily repel moth pests.

  The aerosol valve includes an opening and closing member for switching communication between the metering chamber and the outside of the aerosol valve by the operation of the injection member by the user, and a housing to which the opening and closing member is attached. A mounting member is provided for holding in position. In addition, the opening and closing member includes a stem that slides up and down in conjunction with the injection member. The sliding of the stem switches the communication (injection state) and shutoff (non-injection state) of the aerosol composition. The aerosol valve is formed with a housing bore for taking in the aerosol composition from the aerosol container and a stem bore for delivering the taken-in aerosol composition to the spray member. The housing hole is formed in the housing. The stem hole is formed in the stem. The path from the housing bore to the stem bore constitutes an internal passage through which the aerosol composition passes.

  The stem is a site attached to the aerosol valve, and an internal passage is formed for delivering the aerosol composition taken into the aerosol valve to the injection button. The internal passage is suitably opened and closed by a stem rubber.

  The internal pressure of the aerosol valve at 25 ° C. is preferably 0.2 MPa or more, and more preferably 0.25 MPa or more in the state in which the stock solution and the propellant are filled. Further, the internal pressure of the aerosol valve at 25 ° C. is preferably 0.8 MPa or less, and 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 injection port after injection. On the other hand, if the internal pressure of the aerosol valve exceeds 0.8 MPa, the aerosol composition may leak from the aerosol container. The internal pressure of the aerosol valve is, for example, a PGM-E compact pressure sensor (manufactured by Kyowaden Co., Ltd.) attached to a WGA-710C instrumentation conditioner (manufactured by Kyowaden Co., Ltd.) at 25 ° C as the aerosol valve. It can measure by connecting.

(Jecting member)
The injection member is a member for injecting the stock solution taken from the aerosol container together with the propellant. The injection member is provided with an injection hole for injecting the aerosol composition.

  The number, size and shape of the injection ports are not particularly limited. The number, size and shape of the injection holes may be appropriately adjusted, for example, such that the average particle size of the injected aerosol composition can be adjusted to the range described later. As an example, the number of injection holes may be one, or two or more. The size of the injection port (injection port diameter) is preferably 0.2 mm or more, and more preferably 0.3 mm or more. The diameter of the injection port is preferably 4.5 mm or less, more preferably 3.0 mm or less. The shape (cross-sectional shape) of the injection port may be circular, oval, square, or various irregular shapes.

Further, the total cross-sectional area (total opening area) of the injection port is not particularly limited. The total cross-sectional area is appropriately adjusted, for example, such that the average particle size of the jetted aerosol composition can be adjusted to the range described later. As an example, the total cross-sectional area, is preferably 0.03 mm ² or more, and more preferably 0.07 mm ² or more. The total cross-sectional area is preferably 16.0 mm ² or less, more preferably 7.5 mm ² or less. In the present embodiment, the “total cross-sectional area” is the total area of the cross-sectional area (opening area) of the injection port. That is, when there is one injection port, the total cross-sectional area is the cross-sectional area of the injection port itself, and when there are two or more injection ports, the total cross-sectional area is the sum of the cross-sectional areas of all the injection ports.

  In the aerosol product of the present embodiment, when the injection button is operated by the user, the stem mechanism and the aerosol valve are operated, and the metering chamber of the aerosol valve communicates with the outside. As a result, a predetermined amount of the aerosol composition in the metering chamber of the aerosol valve is taken out according to the pressure difference between the metering chamber of the aerosol valve and the outside, and is jetted from the injection port of the injection member.

  The aerosol product of the present embodiment is preferably adjusted so that the injection amount per injection is 0.2 mL or more. Moreover, it is preferable that the aerosol product is adjusted so that the injection amount per time will be 1.0 mL or less. By adjusting the injection amount per time to be within the above range, the repelling method of the present embodiment is less likely to kill the moth pest at the application site, and easily repelled.

  The repelling method of the present embodiment is characterized in that the aerosol composition is jetted 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. Moreover, it is preferable that it is 20-80 degrees, and, as for the angle at the time of injection, it is more preferable that it is 30-70 degrees. In the past, aerosol compositions were sometimes sprayed upwards, causing the sprayed aerosol composition to settle and be applied to the point of application. However, such a method has a problem that it is difficult to adjust the amount of processing to the application site. So, the repelling method of this embodiment has the advantage that adjustment of the amount of processing to an application location is easy by spraying an aerosol composition towards the lower part. As a result, according to the repelling method of the present embodiment, it is difficult to kill and easily repel moth pests.

  In the injection method of the present embodiment, it is preferable that the processing volume at the application point be adjusted by injecting downward. The treatment volume is the injection amount to be treated per tatami, and specifically, the treatment volume is preferably jetted so as to be 0.2 mL or more per tatami. In addition, it is preferable that the treatment volume be injected so as to be 1.0 mL or less per tatami. When the treatment capacity is adjusted within the above range, the repelling method of the present embodiment is less likely to kill and easily repel moth pests. For example, when the processing volume per tatami is 0.2 mL, it can process to 5 tatami by the 1 mL jet, and when the processing volume per tatami is 0.5 mL, it can process to the 2 tatami by the 1 mL jet.

  The average particle size (D50) of the jetted aerosol composition is not particularly limited. As an example, the average particle diameter (D50) is preferably jetted to be 15 μm or more, more preferably 20 μm or more. The average particle diameter (D50) is preferably jetted so as to be 95 μm or less, more preferably jetted so as to be 90 μm or less, and still more preferably jetted so as to be 70 μm or less. By adjusting the average particle diameter (D50) within the above-described range, the repelling method of the present embodiment is less likely to kill the insect pest and easily repelled. In the present embodiment, the average particle size (D50) means D50 (a cumulative 50%) measured by the particle size distribution measuring apparatus and analyzed by the automatic calculation processing apparatus. Specifically, the average particle size (D50) is an automatic start average (averaged number of times: 3 times) at 25 ° C. using a laser particle size distribution measuring apparatus (LDSA-1400A, manufactured by Tonichi Computer Applications Inc.) Interval of 0.60 ms), and indicate the average particle size at a position of 30 cm.

  The repelling method of the present embodiment sprays (aerosol spray) the contents (aerosol composition) containing the undiluted solution and the propellant using the above-mentioned aerosol product. In this case, for example, compared with the case where the same stock solution is pump-injected so that the amount of the active ingredient treated per unit area is the same, it is difficult to kill moths and other pests such as ticks and repel.

  In addition, the repelling method of the present embodiment is characterized in that the aerosol product is used to spray downward. Thus, the repelling method of the present embodiment is less likely to kill and easily repel moth pests at the application site. In addition, the amount of injection per time, the treatment volume, the average particle diameter (D50) of the injected aerosol composition, the kind of the repellent component, etc. are appropriately adjusted so that the repellent effect against moth pests is more easily obtained. It can be done.

  The method for producing the aerosol product used in the repelling method of the present embodiment is not particularly limited. By way of example, an aerosol product may be produced by filling the aerosol container with the undiluted solution, closing the opening of the aerosol container by means of the aerosol valve, and pressure filling the propellant through the orifice or stem of the injection member. it can.

  In addition, the kind of moth pest which the repelling method of this embodiment makes a repelling object in particular is not limited. For example, insect pests are the house dust mites, house dust mites, mites such as pokeweed ticks, etc., and others such as spiders, centipedes, ants, gegets, dumplings, dumplings, lice beetles, termites, bugs, ticks, ticks, lice, ticks, etc. . Among these, the repelling method of the present embodiment is preferably performed on a mite, lice or bed lice, and more preferably performed on a mite or lice. The repelling method of the present embodiment can be applied to these insect pests so that these insect pests are hardly killed and repelled. As a result, these insect pests can be repelled from the application site, and insect bodies hardly survive. Therefore, the repelling method of this embodiment can suppress the problem (for example, mite allergy) due to the remaining insects of these insect pests.

  Hereinafter, the present invention will be more specifically described by way of examples. The present invention is not limited to these examples. In addition, unless there is a restriction in particular, "%" means "mass%" and "part" means "mass part."

Details of the used aerosol products and pump products are shown below.
Aerosol product 1 of Example 1: Injection member (aperture diameter: 1.0 mm, cross-sectional shape of injection port is one injection port having a circular shape), aerosol valve (volume: 0.2 mL of measuring chamber)
Aerosol product 2 of Example 2: injection member (aperture diameter: 0.6 mm, cross-sectional shape of injection port is circular injection nozzle 1), aerosol valve (volume of measuring chamber: 1.0 mL)
Aerosol product 3 of Example 3: injection member (injection diameter φ 1.0 mm, cross-sectional shape of injection port is one injection port having a circular shape), aerosol valve (volume 0.2 mL of measuring chamber)
Aerosol product 4 of the fourth embodiment: injection member (injection diameter φ 0.3 mm, injection port with one circular injection nozzle cross-sectional shape), aerosol valve (volume 0.2 mL of measuring chamber)
Pump product 1 of Comparative Example 1: Injection member for pump (injection diameter φ 0.6 mm, cross-sectional shape of injection port is one injection port with circular shape), valve for pump (discharge volume 1 mL)

<About differences in formulation types>
The lethal effects of the aerosol product and the pump product on the house dust mites were compared at the same drug throughput per unit area.

Example 1
Phenothrin was dissolved in 99.5% ethanol to 35.0 w / v% to prepare a stock solution. The resulting undiluted solution is filled in an aerosol container with a volume of 59 mL and attached with an aerosol valve, and then the propellant (liquefied petroleum) is made to have a blending ratio (volume ratio) of undiluted solution and propellant of 6.9 mL / 16.1 mL Gas-saturated vapor pressure: 0.49 MPa (25 ° C.) was pressure-filled, a spray member was attached, and 23 mL of an aerosol product was produced as a composition (aerosol valve, spray member used aerosol product 1).

(Comparative example 1)
Phenothrin was dissolved in 99.5% ethanol so as to be 0.315 w / v% to prepare a stock solution. The resulting undiluted solution was filled into a pump container of 300 mL in volume and filled with 250 mL of the pump container, the pump valve was attached, the pump injection member was attached, and the pump product was manufactured (the pump valve and the pump injection member used the pump product 1) ).

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

(How to confirm the lethal effect)
Yellow leopard mites (about 100 to 300) were placed in a waist high petri dish (φ 9 cm, height 6 cm) and placed near the center of the following space. Thereafter, the aerosol product of Example 1 and the pump product of Comparative Example 1 were treated according to the following method and allowed to stand for about 15 hours. The injection angles were all 30 ° downward with respect to the horizontal direction. Thereafter, the lethal number of the test insects was counted. The test was performed twice. The results of mean mortality (%) are shown in Table 1.

Method of Treating Aerosol Product The aerosol product manufactured in Example 1 is 1 meter away from the waist height petri dish placed in one tatami mat space (dimension: 0.91 m × 1.82 m, 1.66 m ² ) One injection (0.2 mL) was injected from the shortest linear distance to the treated surface on the waist high petri dish, and so forth. In addition, the average particle diameter of the aerosol composition injected in this condition (the measurement method is referred to the following) was 42.8 micrometers.
Method of Treating Pump Product The pump product produced in Comparative Example 1 was sprayed once (1.0 mL) vertically from a distance of 30 cm onto the waist height petri dish placed in a space of 50 cm square. In addition, the average particle diameter (The measuring method is referring to the following.) Of the content injected on this condition was 162.0 micrometers.
According to these treatment methods, phenothrin is treated so as to be about 12 mg / m ² per unit area in each of Example 1 and Comparative Example 1.

(Method of measuring particle size)
At 25 ° C, using a laser particle size distribution analyzer (LDSA-1400A, manufactured by Tonichi Computer Applications Inc.), a distance of 30 cm from the nozzle as an automatic start average (average number of times 3 times, interval 0.60 ms) The average particle size (D50) was measured.

  As shown in Table 1, the aerosol product of Example 1 was able to reduce lethality as compared to the pump product of Comparative Example 1. This shows that even if the treatment concentration is the same, mortality can be reduced by employing aerosol injection as compared to pump injection.

<About the difference in particle size>
Under the condition that the drug treatment amount is the same per unit area, the lethal effects on the house dust mites were compared between aerosol products with different particle sizes.

(Example 2)
Phenothrin was dissolved in 99.5% ethanol to 19.8 w / v% to prepare a stock solution. The resulting undiluted solution is filled in an aerosol container with a volume of 59 mL and attached with an aerosol valve, and then the propellant (liquefied petroleum) is brought to a blending ratio (volume ratio) of undiluted solution and propellant of 4.6 mL / 18.4 mL Gas-saturated vapor pressure: 0.49 MPa (25 ° C.) was pressure-filled, a spray member was attached, and 23 mL of an aerosol product was produced as a composition (aerosol valve, spray member used aerosol product 2).

(Example 3)
Phenothrin was dissolved in 99.5% ethanol to 21.0 w / v% to prepare a stock solution. The resulting undiluted solution is filled in an aerosol container with a volume of 59 mL, and after an aerosol valve is attached, the propellant (liquefied petroleum) is adjusted so that the blending ratio (volume ratio) of undiluted solution and propellant becomes 11.5 mL / 11.5 mL Gas-saturated vapor pressure: 0.49 MPa (25 ° C.) was pressure-filled, a spray member was attached, and 23 mL of an aerosol product was produced as a composition (aerosol valve, spray member used aerosol product 3).

(Example 4)
Phenothrin was dissolved in 99.5% ethanol to 15.0 w / v% to prepare a stock solution. The resulting undiluted solution is filled in an aerosol container with a volume of 59 mL, and after attaching an aerosol valve, the propellant (liquefied petroleum) is adjusted so that the blending ratio (volume ratio) of undiluted solution and propellant becomes 16.1 mL / 6.9 mL Gas-saturated vapor pressure: 0.49 MPa (25 ° C.) was pressure-filled, a spray member was attached, and 23 mL of an aerosol product was produced as a composition (aerosol valve, spray member used aerosol product 4).

  The lethal effects of the aerosol products obtained in Examples 2 to 4 were confirmed by the following evaluation methods. The results are shown in Table 2.

(How to confirm the lethal effect)
Yellow leopard mites (about 100 to 300) were placed in a waist high petri dish (φ 9 cm, height 6 cm) and placed near the center of the following space. Thereafter, the aerosol products of Examples 2 to 4 were treated by the following methods and allowed to stand for about 15 hours. The injection angles were all 30 ° downward with respect to the horizontal direction. Thereafter, the lethal number of the test insects was counted. The test was performed twice. The results of average mortality (%) are shown in Table 2.

Method of Treating Aerosol Product The aerosol product prepared in Example 2 is placed on a 2 tatami mat space (size: 1.82 m × 1.82 m, 3.31 m ² ) from the distance of 1 m relative to the above waist height petri dish One injection (1 mL) was injected. In addition, the aerosol products prepared in Example 3 and Example 4 are placed on a 1 tatami space (dimensions: 0.91 m × 1.82 m, 1.66 m ² ) from the distance of 1 m relative to the above waist height petri dish One injection (0.2 mL) was injected. The average particle size of the aerosol composition sprayed under this condition (see the method of measurement below) is 20.9 μm in Example 2, 69.7 μm in Example 3, and 93.1 μm in Example 4. The
According to these treatment methods, phenothrin is treated to be about 12 mg / m ² per unit area in any of Examples 2 to 4.

(Method of measuring particle size)
At 25 ° C, using a laser particle size distribution analyzer (LDSA-1400A, manufactured by Tonichi Computer Applications Inc.), a distance of 30 cm from the nozzle as an automatic start average (average number of times 3 times, interval 0.60 ms) The average particle size (D50) was measured.

  As shown in Table 2, it was found that when the average particle size (D50) was 20.9 to 69.7 μm, the mortality could be further reduced. Moreover, it turned out that average mortality can be reduced rather than the pump product of Comparative Example 1.

<About the repelling effect>
The repellant effect was compared against the house dust mites with different particle sizes of aerosol and pump products under the same drug throughput per unit area.
FIG. 1 is a schematic view of an experimental apparatus for explaining a method of confirming the repelling effect. As shown in FIG. 1, in a petri dish 1 having a diameter of 15 cm, black paper 2 of 9 cm square and four cotton cloths of 3.5 cm square are arranged in order from the bottom of petri dish 1 Then, 2 cm square black paper 4 was placed at the center of each cotton cloth 3 and food (fresh medium 5) was placed on each black paper 4. Among the cotton cloths 3a to 3d, the contents were jetted to the cotton cloth 3a and the cotton cloth 3c using the aerosol products of Examples 1 to 4 or the pump products of Comparative Example 1 according to the following method. As a result, the four cotton cloths 3a to 3d are alternately arranged with those which were not subjected to the repelling treatment. In addition, about 500 to 1000 test insects (prickly spotted mites) were placed almost equally in the four places on the outer side of the black paper 2. Let stand at 25 ° C, 75% RH overnight and count the test insects crawling up in the treated area (cotton cloth 3a and cotton cloth 3c) and the non-treated area (cotton cloth 3b and cotton cloth 3d). The repelling rate (%) was calculated by the formula. The test was performed twice. The results of the average repelling rate (%) are shown in Table 3.
Tick repellant rate (%)
= 100 x (number of crawling ticks in the untreated area-number of crawling ticks in the treated area) / (number of crawling ticks in the untreated zone)

(Method of processing contents into cotton cloth)
The aerosol products produced in Examples 1 to 4 or the pump product produced in Comparative Example 1 were jetted once. The aerosol products prepared in Example 1, Example 3 and Example 4 were the above-mentioned cotton cloth 3a and cotton cloth placed in one tatami space (dimensions: 0.91 m × 1.82 m, 1.66 m ² ) One shot (0.2 mL) was injected from a distance of 1 m for 3c. The aerosol product produced in Example 2 is 1 time from a distance of 1 m with respect to the above-mentioned cotton cloth 3a and cotton cloth 3c placed in a 2 tatami mat space (dimension: 1.82 m × 1.82 m, 3.31 m ² ) 1.0 mL was injected. The injection angles were all 30 ° downward with respect to the horizontal direction. In addition, the pump product prepared in Comparative Example 1 was jetted once (1.0 mL) vertically from the height of 30 cm to the cotton cloth 3a and the cotton cloth 3c placed in the space of 50 cm square.
According to these treatment methods, phenothrin is treated to be about 12 mg / m ² per unit area in each of Examples 1 to 4 and Comparative Example 1.

  As shown in Table 3, all of the aerosol products of Examples 1 to 4 and the pump product of Comparative Example 1 exhibited a repellant effect on the test insect. In addition, as a result, as a result of spraying the aerosol product of Example 1 once upward (the angle with respect to the horizontal direction is 30 °), no repelling effect against the test insect was observed. Here, referring to Table 1 and Table 2 together, when the aerosol products of Examples 1 to 4 are sprayed downward toward the application site, the lethal effect is reduced and the repelling effect is sufficient. It turned out that it was. Therefore, according to the aerosol product of Examples 1-4, it turned out that it is hard to kill the target pest of an application location, can be repelled, and it is hard to make an insect body remain in an application location. On the other hand, it has been found that the pump product of Comparative Example 1 tends to kill the target pest, and there is a risk of leaving the worm at the application site.

1 petri dish 2 black paper 3a to 3d cotton cloth 4 black paper 5 fresh medium P1 to P4

Claims (4)

  A method for repelling moths and pests, wherein the aerosol composition is jetted downward from a metered-dose aerosol product filled with an aerosol composition containing an undiluted solution containing repellent components for moths and a propellant. The injection volume per injection is 0.2 to 1.0 mL,
The method according to claim 1, wherein the treatment volume is injected to 0.2 to 1.0 mL per tatami.   The method according to claim 1 or 2, wherein the average particle diameter (D50) of the injected aerosol composition is 15 to 95 μm. The repellent component is a pyrethroid compound,
The method for repelling moth and pest according to any one of claims 1 to 3, wherein the moth and pest are mites.

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