TWI744793B - Mosquito control aerosol and mosquito control method - Google Patents

Abstract

The present invention provides an aerosol for mosquito control that improves the operation stability of a quantitative injection valve after repeated use, and can exert an excellent control effect on mosquitoes over a long period of time, and reduce the impact on humans or pets.

The present invention is an aerosol for controlling mosquitoes, which is an aerosol for controlling mosquitoes with a pressure-resistant container, a quantitative injection valve (100), and an injection button. The aerosol stock solution and propellant of Transfluthrin and/or Metofluthrin and organic solvents of lower alcohols and/or hydrocarbon solvents, the quantitative injection valve (100) has a valve stem (11) and a valve The valve mechanism (10) and housing (20) of rod rubber (12) and spring (13), the injection button is provided with an injection port, which is characterized in that the volume ratio of aerosol stock solution and propellant is 6/94~50/50 , The stem rubber (12) is made of acrylonitrile butadiene rubber, and the spring (13) is a reinforced spring.

Description

Aerosol for mosquito control and mosquito control method

The present invention relates to a mosquito control aerosol provided with a pressure-resistant container, a quantitative injection valve, and a spray button, and a mosquito control method using the aerosol, wherein the pressure-resistant container is enclosed with pest control components and an organic solvent The aerosol stock solution and propellant, the quantitative injection valve is assembled at the mouth of the pressure-resistant container, and the injection button is provided with an injection port connected to the quantitative injection valve.

As a method of repelling flying insects, there are, for example, a method of evaporating the agent from a carrier containing insecticidal ingredients and evaporating the agent in the treatment space, a method of directly spraying the agent on flying insects, and spraying the agent in a place prone to flying insects in advance. The method and so on. Regarding these methods, as a product for repelling flying insects that invade the house, aerosol insecticides containing insecticidal ingredients are being developed. Aerosol insecticides are widely used as easy-to-use products because they can simply spray insecticidal ingredients into the treatment space.

Conventionally, an aerosol insecticide is one that suppresses the decrease in the residual rate of the agent in the indoor air (for example, refer to Patent Document 1). According to Patent Document 1, after the drug is released, the concentration of the drug in the air is suppressed by leaving the drug in the air, and a sustained and sufficient repellent effect on mosquitoes lurking in the dark can be achieved.

In addition, the particle size of the agent when sprayed indoors is set to be an aerosol insecticide larger than that of Patent Document 1 (for example, refer to Patent Document 2). Patent Document 2 is an aerosol insecticide based on the same technical idea as Patent Document 1. It attempts to increase the insecticidal effect on mosquitoes by increasing the amount of the agent as much as possible and remaining in the indoor air.

On the other hand, regarding an aerosol insecticide, it is a method of repelling flying pests in a house, and it is characterized by being attached to the surface of indoor structures or equipment (for example, refer to Patent Document 3). According to Patent Document 3, in order to evaporate specific compounds attached to indoor structures and the like, repeated spraying or continuous operation of electrical appliances are not required, and flying insects in houses can be effectively repelled by simple means.

In addition, in view of the widespread use of aerosol pesticides of the quantitative spray type, the present inventors have developed pest control using at least one selected from the group consisting of Metherine, Profluthrin, and Biofulin Ingredients, and use lower alcohols with carbon number 2~3 as solvents, and specify the spray force, the particle size distribution of spray particles, and the adhesion efficiency of the spray particles to the floor surface or wall surface in the room, and the processing space is passed 5~12 It is a pest control method by aerosol of the metered spray type that can control both flying pests and creeping pests (refer to Patent Document 4).

[Prior Technical Literature] [Patent Literature]

[Patent Document 1] JP 2001-17055 A

[Patent Document 2] JP 2013-99336 A

[Patent Document 3] JP 2001-328913 A

[Patent Document 4] Japanese Patent No. 5517496

The aerosol insecticide of Patent Document 1 attempts to increase the time that the agent remains in the air by adjusting the particle size of the agent that diffuses into the room, so that the duration of the agent becomes a long time. However, the air-survival rate of the drug particles for more than 12 hours from the start of the treatment is 0.5% or more, and the aerosol insecticide of Patent Document 1, which aims to maintain the air-survival rate, has a limited duration. Even in Patent Document 2, the residual rate of drug particles in the air is the same as that in Patent Document 1, and it is not an aerosol pesticide that can expect a long-term duration.

Here, among the mosquitoes targeted for control (including not only common mosquitoes, such as Culex pipiens pallens, Aedes albopictus, but also chironomids belonging to the suborder Longhorn, or butterflies and flies, etc.), especially Culex pallens Or Aedes albopictus, because it is a mosquito that not only sucks blood but is also a vector-infected mosquito, it is necessary to protect itself from such mosquitoes, and it is seeking to establish a more effective repellent method than before. Since mosquitoes are flying pests that invade the house day and night, Ideally, it is an insecticide that lasts as long as 24 hours in a day.

However, as described above, the aerosol insecticides disclosed in Patent Document 1 and Patent Document 2 only last for about 12 hours. In addition, although Patent Document 1 and Patent Document 2 actively retain the drug in the air by adjusting the particle size of the drug, the drug particles remain in the air, and people or pets in the treatment space are left inhaled for a long time. The environment of the drug. Therefore, even at the point of impact on the human body or pets, it is difficult to say that it is a better aerosol insecticide.

Even in the repellent method of Patent Document 3, it is not clear whether the stable effect can be maintained over a long period of time. It is believed that the drug particles sprayed in the air follow (A) floating in the air and remaining, (B) attached to the floor or wall, (C) volatilized again after (B), or (D) by light, etc. Any act of decomposition and disappearance. In view of these circumstances, the repellent method of Patent Document 3 is equivalent to the type (C). However, when the chemicals attached to indoor structures etc. volatilize into the air again, they are easily affected by temperature, air volume, etc. The repellent method in Patent Document 3 does not always provide a stable effect on the repelling of flying insects.

In the pest control method of Patent Document 4, a lower alcohol with a carbon number of 2 to 3 is used as a solvent. Compared with other solvents such as higher fatty acid esters, it has high quick-drying property and evaporates quickly after spraying. The concentration of pest control components in the particles and enhance the control effect. In the quantitative spray type aerosol, it is a highly useful solvent. However, for the aerosol insecticide used in the pest control method of Patent Document 4, the pest control effect The effect lasts only about 12 hours. In addition, the inventors of the present inventors conducted various studies with regard to quantitative injection type aerosols using 2 to 3 lower alcohols as solvents, and determined that the quantitative injection type aerosol was repeatedly used, and the quantitative injection valve Even with the aerosol insecticide of Patent Document 4, there is still room for improvement in the possibility of affecting the operational stability.

The present invention was completed in view of the above-mentioned problems to provide an improved operation stability of a quantitative injection valve after repeated use, and even among flying pests, especially for mosquitoes, it can exert an excellent control effect over a long period of time. In addition, an aerosol for mosquito control that reduces the impact on the human body or pets and a mosquito control method using the aerosol for mosquito control are intended.

With regard to the characteristic structure of the mosquito control aerosol of the present invention to solve the above-mentioned problems, it is an aerosol for mosquito control provided with a pressure-resistant container, a quantitative injection valve, and a spray button, and the pressure-resistant container is enclosed and contains pests. The aerosol stock solution and propellant of Byfulin and/or Meteline and organic solvents of lower alcohols and/or hydrocarbon solvents with control components. The quantitative injection valve has a valve mechanism including a valve stem and a valve stem rubber and a spring. And a housing containing the valve mechanism, and assembled in the mouth of the pressure-resistant container, the injection button is provided with an injection port connected to the quantitative injection valve, and is characterized by the aerosol stock solution (a) and the propellant (b) ) Capacity The ratio (a/b) is 6/94~50/50, the material of the valve stem rubber is acrylonitrile butadiene rubber, the spring is a reinforced spring, and the injection volume when the injection button is pressed once is 0.1~1.0 mL, the particle size of the sprayed particles sprayed from the aforementioned spray port, the 90% particle size of the cumulative volume distribution at 25°C and the spraying distance of 15cm is 10~80μm.

As mentioned in the "problem to be solved by the invention", the conventional aerosol pesticides have been developed in the direction of actively dispersing the drug particles in the treatment space and keeping them in the air for as long as possible. However, when the residence time of the drug particles floating in the processing space becomes a long time, there is a possibility of inhaling the drug particles when there are people or pets in the processing space, so there is a concern about the health effects.

However, according to the research of the present inventors, it was determined that mosquitoes representing mosquitoes (hereinafter, simply referred to as "mosquitoes" in the present invention) stay longer on walls and the like than the time they fly. In other words, the mosquitoes that have invaded the house stay on the wall for most of the time and become an opportunity to find blood-sucking humans. Therefore, as in the past, the long-term method of long-term treatment of pharmaceutical particles in the floating space can have a certain effect on the control of flying mosquitoes, but it cannot give full play to the insecticides for mosquitoes staying on walls, etc. As a result, the control of mosquitoes may be incomplete. Based on the above-mentioned research results, the inventors of the present invention believe that improving the effect of preventing mosquitoes staying on walls and the like, while suppressing the inhalation of drugs by humans or pets, leads to an improvement in the overall control of mosquitoes that invade the house.

Therefore, in the mosquito control aerosol of the present invention, the aerosol is When the collagen solution is sprayed in the treatment space, the sprayed particles move to the exposed part of the treatment space (for example, the surface of the floor, wall, furniture, etc.) in the treatment space, and adhere to the exposed part conduct. Thereby, the mosquitoes staying in the exposed part and the mosquitoes flying in the treatment space can be effectively knocked down or killed, and the overall control effect of the mosquitoes can be improved. Regarding the spray particles of aerosol, the inventors have studied diligently and found that if an aerosol stock solution is used, the aerosol stock solution uses Bayefulin and/or Methelin as pest control components, and uses lower alcohols and/or hydrocarbons. As an organic solvent, the solvent becomes favorable for the formation of particles suitable for mosquito control. In this case, the effect of the pest control component contained in the spray particles can be exerted reliably and efficiently. In addition, the preparation of the aerosol stock solution can be carried out easily.

Next, adjust so that the volume ratio (a/b) of the aerosol stock solution (a) to the propellant (b) becomes 6/94-50/50, and the ejection volume when the ejection button is pressed once becomes 0.1-1.0 mL In this case, the sprayed particles quickly move to the exposed part of the processing space and adhere. As a result, the mosquitoes staying in the exposed part can be surely knocked down or killed by the pest control component.

Furthermore, the particle size of the sprayed particles is formed so that the 90% particle size of the cumulative volume distribution at 25° C. and the spraying distance of 15 cm is in the range of 10 to 80 μm. If it is in such a range, mosquitoes staying in the exposed part can be surely knocked down or killed with pest control ingredients.

In addition, the aerosol quantitative injection valve for mosquito control of the present invention has a valve mechanism including a valve stem, valve stem rubber and a spring, and a housing for accommodating the valve mechanism. However, the material of the valve stem rubber is set to acrylonitrile. Ding Diene rubber uses a reinforced spring as the spring to improve the operating stability of the quantitative injection valve, and after repeated use of the mosquito control aerosol, the recovery state of the pressed injection button also becomes good.

In the aerosol for mosquito control of the present invention, the aforementioned reinforced spring is preferably a spring having an elastic constant of 3.3 N/mm or more.

According to the mosquito control aerosol of this constitution, by using a spring with an elastic constant of 3.3N/mm or more as the spring, the operation stability of the quantitative injection valve is further improved. The spray button has indeed returned to its original point, so the quality and performance of the aerosol can be maintained for a long time.

In the aerosol for controlling mosquitoes according to the present invention, the aforementioned pest controlling component is preferably Byfulin.

According to the mosquito control aerosol of this composition, when the pest control component is Byfulin, it can control mosquitoes more effectively.

Regarding the mosquito control aerosol of the present invention, when the aerosol stock solution is sprayed once in the treatment space, it is preferable that the pest control component has a residual rate of 0.05 to 5% in the air after 2 hours. The duration of the effect of the control component is 18 hours or more for a space of ^{33.3 m 3 or less.}

According to the mosquito control aerosol of this constitution, when the aerosol stock solution is sprayed into the treatment space once, the residual rate in the air (in the treatment space) after 2 hours with the pest control ingredient is 0.05 to 5%, and The effect duration of the pest control ingredients ^{is adjusted for 18 hours or more in a space below 33.3m 3} , and the sprayed particles sprayed in the treatment space quickly move to the exposed part of the treatment space and adhere. On the other hand, the sprayed particles floating in the processing space reduce the amount of sprayed particles adhering to the exposed part. In other words, the aerosol for mosquito control of the present invention does not diffuse the aerosol stock solution in the entire treatment space like conventional products, and it greatly reduces the concern of affecting humans or pets compared with conventional products. Moreover, the insect pest control component of the sprayed particles floating in the processing space can also exert the effect of knocking down or killing mosquitoes flying in the processing space. Moreover, in the case of the aerosol for mosquito control of the present invention, since the aerosol stock solution is sprayed in the treatment space once, it can pass the pest control effect for more than 18 hours in a space of ^{33.3m 3 or less, so it can pass} For most of the day, maintain a comfortable space that prevents pests from entering.

In the mosquito control aerosol according to the present invention, the particle size of the sprayed particles sprayed from the spraying port is preferably 25 to 70 μm in the 90% particle size of the cumulative volume distribution at 25° C. and a spraying distance of 15 cm.

According to the mosquito control aerosol of the present configuration, the sprayed particles are adjusted to the above-mentioned most suitable range, and the sprayed particles move quickly and adhere to the exposed part in the processing space. Therefore, it is possible to more reliably knock down or kill the mosquitoes staying in the exposed part.

In the aerosol for mosquito control of the present invention, it is preferable that the spray volume when the spray button is pressed once is 0.1 to 0.2 mL.

According to the mosquito control aerosol of this structure, the spray volume is adjusted to the most suitable range as described above, so that the sprayed particles It exists in a more suitable state and can maximize the effect of pest control ingredients.

In the aerosol for mosquito control of the present invention, it is preferable that the spray amount of the pest control component when the spray button is pressed once is 5.0 to 30 mg ^{per 18.8 to 33.3 m 3 of treatment space.}

According to the mosquito control aerosol of this structure, the spray amount of the pest control component when the spray button is pressed once is adjusted so as to become the most suitable range mentioned above, so the sprayed particles move quickly into the processing space. Expose the part and attach. As a result, the mosquitoes staying in the exposed part can be surely knocked down or killed by the pest control component.

In the aerosol for mosquito control of the present invention, the aforementioned organic solvent is preferably a lower alcohol having a carbon number of 2 to 3.

According to the mosquito control aerosol of this constitution, when the organic solvent is a lower alcohol with a carbon number of 2 to 3, the effect of the pest control component can be more efficiently exhibited.

Regarding the aerosol for mosquito control of the present invention, the aerosol stock solution is preferably used as a sensitivity reduction processing aid of Byfulin, and contains higher fatty acid esters and/or carbon numbers with a total of 13-20 carbons. It is 3~6 diols.

According to the aerosol for mosquito control of this composition, higher fatty acid esters with a total number of carbons of 13-20 and/or glycols with a carbon number of 3-6. When used in combination with Bayefulin, it is due to its sensitivity Reduce the effect of processing aids, even for mosquitoes that are less sensitive to Byfulin, it can also exert a high control effect.

With regard to the characteristic structure of the mosquito control method of the present invention to solve the above-mentioned problems, it uses any one of the aerosols for mosquito control described above, and sprays the aerosol stock solution in the treatment space, which can be knocked down or killed. Anti-mosquito class.

Since the mosquito control method of this constitution is implemented using the aerosol for mosquito control of the present invention, it can exhibit an excellent mosquito control effect as described above.

10: Valve mechanism

11: Stem

12: Valve stem rubber

13: Spring (strengthening spring)

20: shell

21: Quantitative Room

100: quantitative injection valve

R: spray particles

X: Spray particles attached to the exposed part

Y: Jet particles floating in the processing space

[Fig. 1] Fig. 1 is a cross-sectional view of a quantitative injection valve equipped with an aerosol for mosquito control according to the present invention.

[Fig. 2] Fig. 2 is a model diagram showing the behavior of sprayed particles when an aerosol stock solution is sprayed into a processing space.

The aerosol for mosquito control of the present invention is provided with a pressure-resistant container, a quantitative injection valve, and a spray button. The pressure-resistant container is enclosed with Byefulin and/or Methelin containing pest control components and used as an organic solvent The aerosol stock solution and propellant of lower alcohol and/or hydrocarbon-based solvent, the quantitative injection valve is assembled at the mouth of the pressure container, and the injection button is provided with an injection port connected to the quantitative injection valve. Hereinafter, the aerosol for controlling mosquitoes of the present invention will be described. However, the present invention is not intended to be limited to the embodiments described below or the configuration described in the drawings.

<Aerosol stock solution> [Pest Control Ingredients]

The pest control component, which is one of the main components of the aerosol stock solution, uses Beefulin and/or Methelin which are equivalent to pyrethroid compounds. In addition, in Bioflin and Methelin, although optical isomers or geometric isomers exist based on asymmetric carbon, these are also included in the present invention. The preferred pest control ingredient is Byfulin. Compared with Metherin or Profluthrin, Bioflumide can be favorably treated even for flying insects that reduce the sensitivity to pyrethroid compounds. Therefore, when Biefling is used as a pest control component, the mosquito control aerosol of the present invention has a relatively small reduction in the control effect even for flying pests of the pyrethroid resistant system.

The content of the pest control component in the aerosol stock solution is to be sprayed into the treatment space after considering the dissolution in the lower alcohol and/or hydrocarbon solvent used as the organic solvent, and it is preferably set at 1.0 to 60% by weight. If it is in this range, the pest control components are easily soluble in lower alcohols and/or hydrocarbon solvents (organic solvents), and when spraying the aerosol stock solution, the spray particles are formed in the most suitable state, and the pest control components can be used. Effect. When the content of the pest control component in the aerosol stock solution is less than 1.0% by weight, the pest control component cannot be effectively exerted, and the mosquito control effect becomes insufficient. On the other hand, when the content of the pest control component in the aerosol stock solution exceeds 60% by weight, it becomes difficult to properly prepare the aerosol stock solution due to the increase in the concentration of the pest control component.

As mentioned above, although the pest control components contained in the aerosol for mosquito control of the present invention include Byfulin and/or Methelin, in addition, It may also contain profluthrin, Mepafurutorin, empenthrin, dimefluthrin, momfluorothrin, heptafluthrin, phthalthrin, and tetramethrin Resmethrin, cyfluthrin, phenothrin, permethrin, cyphenothrin, cypermethrin, allethrin, Puya Other pyrethroid compounds such as prallethrin, furamethrin, imiprothrin, and Etofenprox, silicon compounds such as silafluofen, dichloro Organophosphorus compounds such as dichlorvos and fenitrothion, and carbamate compounds such as propoxur.

When the pest control component sprays the aerosol stock solution once in the treatment space, it is preferably adjusted so that the residual rate in the air (in the treatment space) after 2 hours has elapsed becomes 0.05 to 5%. The residual rate in the air is the ratio of the number of particles (P) in the processing space immediately after injection to the number of particles (Q) in the processing space after a specified time has elapsed, that is, although Q/P× 100 (%) means that, simply by the method described in the following examples, the theoretical air concentration of the pest control component (weight basis) and the air concentration of the pest control component after a specified time (weight basis) ) Find out. The spray volume of the aerosol stock solution is preferably the spray volume of Byfulin, which is per 18.8~33.3m ³ processing space (equivalent to 4.5~8 tatami mats with an area of 7.5~13.3m ^{2 and a height of 2.2~3.0m} Room), adjusted to 5.0~30mg. If it is in such a range, the spray particles are most appropriately formed from the aerosol stock solution, and the pest control effect can be exerted. In addition, as mentioned above, even with a relatively low survival rate in the air, it can effectively knock down or kill mosquitoes. Furthermore, even if people or pets inhale in the treatment space, it will not affect the human body or pets and can be used safely.

[Organic solvents]

Among the main components of the aerosol stock solution, in addition to the above-mentioned pest control components, organic solvents are also included. The organic solvent can dissolve the aforementioned pest control components to prepare an aerosol stock solution. In addition, when spraying the prepared aerosol stock solution into the treatment space, use the one that forms the most suitable spray particles. In the aerosol for mosquito control of the present invention, a lower alcohol and/or hydrocarbon solvent is used as an organic solvent. Lower alcohols are preferably those with 2 to 3 carbon atoms. Examples of lower alcohols with 2 to 3 carbon atoms include ethanol, n-propanol, or isopropanol (IPA). As the hydrocarbon-based solvent, normal paraffin or isoparaffin can be cited. Among these, lower alcohols with carbon numbers of 2 to 3 are suitable, and ethanol is particularly suitable. Low-grade alcohols with carbon numbers of 2 to 3 have high quick-drying properties and rapid volatilization after spraying. Therefore, the concentration of pest control components in the sprayed particles is high, forming particles suitable for mosquito control, which can reliably and efficiently perform the sprayed particles. Contains the effect of pest control ingredients. In addition, the preparation of the aerosol stock solution can be carried out easily. In addition, as an organic solvent, glycol ethers and the like may be further mixed.

[Sensitivity reduction processing aid]

In the aerosol stock solution, as a treatment aid for reducing the sensitivity of pyrethroid compounds, it is preferable to blend high-grade fats with a total carbon number of 13-20 Ester and/or diols with 3-6 carbons. Examples of higher fatty acid esters with a total carbon number of 13-20 include isopropyl myristate (IPM), methyl myristate, hexyl laurate, isopropyl laurate, and the like. Examples of diols having 3 to 6 carbon atoms include 1,3-butanediol, 1,4-butanediol, dipropylene glycol, 1,2-hexanediol, 1,6-hexanediol, and the like. The inventors found that the above-mentioned higher fatty acid esters with a total carbon number of 13 to 20 or glycols with a carbon number of 3 to 6 reduce the susceptibility of pests to pyrethroid compounds, especially It is particularly effective for mosquitoes, and its effect can be used as a sensitivity reduction processing aid. Blending 2.0-20% by weight of these in the aerosol stock solution can particularly improve the usefulness. In the past, for pests that are sensitive to pyrethroids, although most compounds that enhance their original insecticidal effects are referred to as "effectiveness enhancers", in this specification, when pests with reduced sensitivity are targeted, they are For example, the compound that reduces the degree of reduction in the control effect is different from the previous "efficacy enhancer" and is defined as "sensitivity reduction processing aid". Although the mechanism of action of the two has not been clearly clarified, "effectiveness enhancer" is not always equivalent to "sensitivity reduction processing aid". When the blending amount of the sensitivity reduction processing aid is less than 2.0% by weight, the effect of reducing the degree of reduction of the pest control effect becomes insufficient. On the other hand, if the blending exceeds 20% by weight, not only the pest control effect tends to be stable, but there is also a concern that it may affect the properties of the aerosol stock solution.

[Other ingredients]

In addition to the above-mentioned components, the aerosol for mosquito control of the present invention can add a nonionic surfactant to the aerosol stock solution as a solubilizing aid. As a non Ionic surfactants, for example, ethers such as polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene alkyl amino ethers, etc. Fatty acid esters, polyethylene glycol fatty acid esters, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene glycerol fatty acid esters and other fatty acid esters, polyoxyethylene styrenated phenols, fatty acid polyalkanol amides, etc., Among these, ethers can be suitably used.

In addition, anti-fungal agents, antibacterial agents, bactericides, fragrances, deodorants, stabilizers, antistatic agents, defoamers, excipients, which target acaricides, molds or fungi, etc., can be appropriately blended Agents, synergists, etc. As acaricides, methyl 5-chloro-2-trifluoromethanesulfonamide benzoate, phenyl salicylate, 3-iodo-2-propynyl butyl carbamate (Carbamate )Wait. As antifungal agents, antibacterial agents and fungicides, hinokitiol, 2-mercaptobenzothiazole, 2-(4-thiazolyl)benzimidazole, 5-chloro-2-methyl-4-isothiazoline- 3-ketone, Triforine, 3-methyl-4-isopropylphenol, o-phenylphenol, etc. As the fragrances, orange oil, lemon oil, lavender oil, peppermint oil, eucalyptus oil, citronella oil, lime oil, grapefruit oil, jasmine oil, cypress oil, green tea essential oil, limonene, α-pinene, Shen Aromatic ingredients such as aroma alcohol, geraniol, phenyl ethyl alcohol, amyl cinnamic aldehyde, cuminaldehyde, benzyl acetate, etc., blended with green leaf alcohol or green leaf aldehyde called ``green fragrance'' Spice ingredients, etc. As a synergist, piperonyl butoxide (Piperonyl butoxide), octylbicycloheptene dicarbodiimide (Dicarboximide), etc. are mentioned.

<Propellant>

As the propellant used in the mosquito control aerosol of the present invention, liquefied petroleum gas (LPG), dimethyl ether (DME), hydrofluoroolefin, and other liquefied gas, nitrogen gas, carbon dioxide gas, and dioxygen gas Compressed gases such as nitrogen and compressed air. The above-mentioned propellant can be used alone or in a mixed state, but it is easy to use one having LPG as the main component.

The aerosol for mosquito control of the present invention is adjusted so that the volume ratio (a/b) of the aerosol stock solution (a) and the propellant (b) becomes 6/94-50/50. If it is adjusted within such a range, it is possible to form spray particles optimally from the spray port connected to the quantitative spray valve installed in the pressure vessel. Moreover, once the sprayed particles are sprayed, they can quickly move to the exposed part of the processing space and adhere. On the other hand, among the sprayed particles, the sprayed particles that are not attached to the exposed part become floating in the processing space, but are present in an amount that does not affect the human body or pets. In this way, the sprayed particles are present in the treatment space in the most appropriate state, and the pest control effect can be maximized. Relative to the capacity ratio (a/b) of 6/94, increase the ratio of the propellant (b), that is, when the propellant enclosed in the pressure-resistant container is increased, the amount of propellant is formed from the sprayed aerosol stock. The sprayed particles must be more miniaturized, so the amount of sprayed particles adhering to the exposed part of the processing space is reduced. With this, it may not be possible to reliably prevent mosquitoes staying in the exposed part. On the other hand, relative to the volume ratio (a/b) of 50/50, the ratio of the propellant (b) is reduced, that is, when the propellant enclosed in the pressure container is reduced, the amount of the aerosol It becomes difficult to form the sprayed particles in the above-mentioned most suitable range, so the sprayed sprayed particles are rapidly settled. Therefore, the number of sprayed particles becomes insufficient, and it becomes difficult to knock down or kill mosquitoes early.

<Aerosol for mosquito control>

The aerosol for mosquito control of the present invention is mainly composed of a pressure-resistant container (aerosol container), a quantitative injection valve, and an injection button. As mentioned above, by selecting pest control components, organic solvents, propellants, and other components to be blended if necessary, and sealing these in a pressure container with a quantitative injection valve at the mouth, the injection button with the injection port and The quantitative injection valve is connected to complete the aerosol product. This aerosol product is the aerosol for mosquito control of the present invention, and the aerosol stock solution is sprayed as spray particles in the treatment space. The aerosol stock solution mainly contains pest control components and organic solvents. Strictly speaking, it is different from the propellant. However, since the aerosol stock solution and the propellant are released to the outside of the pressure vessel at the same time, the following description will When the aerosol content containing the aerosol stock solution and propellant is operated as an "aerosol stock solution".

<Quantitative Injection Valve>

Fig. 1 is a cross-sectional view of a quantitative injection valve 100 equipped with an aerosol for controlling mosquitoes according to the present invention. The quantitative injection valve 100 is fastened to the mouth of the pressure-resistant container and connected to the injection button. The spray button is an operating part for spraying the aerosol stock solution. The spray button is provided with a spray port for spraying the aerosol stock solution from the aerosol container to the outside (processing space). The quantitative injection valve 100 has a valve mechanism 10 including a valve stem 11, a valve stem rubber 12 and a spring 13, and a housing 20 that accommodates the valve mechanism 10. The spring 13 adopts a strengthened spring. In addition, as the material of the valve stem rubber 12, acrylonitrile butadiene rubber was used. In this hair Ming’s mosquito control aerosol, a lower alcohol with a carbon number of 2 to 3 used as an organic solvent, is quick-drying compared with other solvents such as higher fatty acid esters, and evaporates quickly after spraying, so the spray particles are improved. Concentration of pest control ingredients in. From this point of view, although the aerosol of the quantitative injection type is a highly useful solvent, after repeated use of the aerosol, there is a possibility that the operation stability of the quantitative injection valve may be affected. As a means to improve the operating stability of the quantitative injection valve after repeated use, although the modification of the valve stem rubber material is considered, there are many factors to test the suitability of the solvent and the valve stem rubber. Considering this point, it was found that in addition to (1) the modification of the stem rubber material, and (2) also focused on the change of structural specifications, as the material of the valve stem rubber, acrylonitrile butadiene rubber was used. In addition, as the spring, a strengthened spring is used to improve the operating stability of the quantitative injection valve, thus completing the present invention. The strengthening spring is preferably a spring having an elastic constant of 3.3 N/mm or more. Here, the elastic constant can be calculated by the following formula (1).

Elastic constant (N/mm)=(transverse elastic modulus×wire diameter to the 4th power)/(8×effective number of turns×central diameter to the 3rd power). . . (1)

As a spring having an elastic constant of 3.3 N/mm or more, for example, a reinforced spring manufactured by MITANI VALVE Co., Ltd. (No.: SP-C321), etc. can be cited. According to the catalog issued by MITANI VALVE Co., Ltd., compared to the previous spring (No. SP-C314), the material is stainless steel (SUS304), the wire diameter is Φ0.55mm, and the number of turns is 9 3/4. The diameter is thickened to Φ0.55mm to Φ0.6mm to increase the spring pressure.

In the dosing injection valve 100 and the dosing chamber 21, a specified amount of aerosol stock solution is introduced from a pressure-resistant container, and when the injection button of the aerosol for mosquito control is pressed once, the dosing injection valve 100 is operated by the pressure of the propellant. , The aerosol stock solution in the dosing chamber 21 rises to the ejection port and is ejected into the processing space. At this time, the spray volume of the aerosol stock solution is adjusted to 0.1 to 1.0 mL, preferably 0.1 to 0.2 mL. According to the aerosol for mosquito control of the present invention, the valve stem rubber made of acrylonitrile butadiene rubber and the reinforced spring improve the operation stability of the quantitative injection valve, and the injection capacity of the aerosol stock solution is more stabilized. If the spraying capacity of the aerosol stock solution is in the above-mentioned range, the sprayed particles formed from the sprayed aerosol stock solution will be in the processing space, and the control effect can be optimally exhibited. When the ejection volume is less than 0.1 mL, the ejection volume is too small, and the ejected particles moving to the exposed part of the processing space become small, so the amount of ejected particles adhering to the exposed part becomes insufficient, so that knockdown or death stays in the exposed part. Mosquitoes become difficult. In addition, since the total amount of sprayed particles becomes smaller, the sprayed particles floating in the processing space also become smaller, and it becomes difficult for the mosquitoes flying in the processing space to knock down or die. On the other hand, when the ejection volume exceeds 1.0 mL, the aerosol stock solution in an amount more than necessary for the processing space is released as ejected particles, and there is concern about the impact on people or pets. In addition, since the amount of aerosol stock solution used has become too large, it is also economically disadvantageous.

In addition, the spray amount of the pest control component is adjusted to 5.0 to 30 mg, preferably 6.1 to 25 mg ^{per 18.8 to 33.3 m 3 of the treatment space as described above.} By the way, ^{the space of 18.8~33.3m 3} is equivalent to a room of 4.5~8 tatami mats. If it is in such a range, the pest control effect can be properly exerted, and the mosquitoes in the treatment space can be reliably knocked down or killed. When the spray amount of the pest control component is less than 5.0 mg, the spray particles adhering to the exposed part of the processing space become small, and the effect of the pest control component is deteriorated, and it becomes difficult to knock down or kill mosquitoes staying in the exposed part. On the other hand, when the spray amount of the pest control component exceeds 30 mg, the pest control component is released in an amount more than necessary for the treatment space, and there is concern about the impact on people or pets. In addition, since the amount of pest control ingredients used has also become too large, it is also economically disadvantageous.

The aerosol for mosquito control of the present invention is set at a position with a distance of 20 cm from the ejection port, and the ejection force becomes 0.3 to 20.0 g at 25°C. f, preferably 0.3 to 10.0 g. The way of f is adjusted. If it is in such a range, the spray particles sprayed from the spray port can quickly reach the exposed part in the treatment space by one spray, and the effect of the pest control component can be exerted. Such spray force can be adjusted appropriately by the composition of the aerosol stock solution, the internal pressure of the aerosol container, the shape of the nozzle, and so on. In this embodiment, the spray force of the aerosol for mosquito control is measured with a digital porce gauge (FGC-0.5, manufactured by Nidec Shinbao Co., Ltd.). Furthermore, it is preferable to set the nozzle diameter of the nozzle to 0.2-1.0 mm. If it is within this range, the above-mentioned particle size and spray force can be adjusted appropriately, from the aerosol stock solution sprayed in the treatment space, the spray particles can be formed most appropriately, the pest control effect can be exerted, and the mosquitoes in the treatment space can be knocked down or killed. kind.

Fig. 2 is a model diagram showing the behavior of sprayed particles formed by the aerosol stock solution when the aerosol stock solution is sprayed into the processing space. Figure 2(a) is when the aerosol for mosquito control related to previous products is sprayed in the treatment space The model diagram, Figure 2(b) is the model diagram when the aerosol for mosquito control of the present invention is sprayed in the treatment space. As shown in Figure 2(a), in the conventional aerosol products for mosquito control (referred to simply as "conventional products"), when the aerosol stock solution is sprayed into the treatment space, it becomes particles M with a particle size of less than 10 μm, and diffuses in Processing space. When the spraying has passed for a period of time, the particles M further diffuse in the entire processing space, and the pests are controlled to be dispersed and distributed in the processing space. In this way, mosquitoes flying in the processing space can be knocked down or killed. However, as mentioned above, since the mosquitoes stay in the exposed part of the treatment space for longer than the flight time, conventional products cannot reliably knock down or kill the mosquitoes that stay in the exposed part of the treatment space. In addition, when the window of the treatment space is opened and wind energy is blown in, a part of the particles M floating in the treatment space is blown away by the wind, which greatly reduces the effect of the pest control component. Furthermore, when the time for the particles M to float in the processing space becomes a long period of time, the amount of particles M inhaled by people or pets in the processing space increases, which may also cause adverse effects on the human body or pets. Therefore, the present inventors have developed a novel aerosol product for mosquito control that solves these problems. Hereinafter, the aerosol product for controlling mosquitoes and the characteristic spray particles related to the present invention will be described.

[Spray particles]

As shown in FIG. 2(b), when the aerosol stock solution is sprayed into the processing space once, spray particles R are formed from the aerosol stock solution. The sprayed particles R quickly move to the exposed part in the processing space and adhere. Here, among the ejected particles R, the ejected particles R attached to the exposed part are designated as the particles X (in Figure 2(b), and indicated by white dots. Hereinafter, the particle X means "spraying Among the shot particles R, the shot particles R attached to the exposed part"). On the other hand, the ejected particles R that are not attached to the exposed part and floating in the processing space are designated as particle Y (in Figure 2(b), and are represented by black dots. Hereinafter, particle Y means "injected particle Among R, the sprayed particles that are not attached to the exposed part and float in the processing space R"). The particle size of the sprayed particles R for moving to the exposed part and adhering (that is, existing as particles X), the 90% particle size of the cumulative volume distribution at 25° C. and the spraying distance of 15 cm is 10 to 80 μm. In such a range, the sprayed particles R sprayed into the processing space, as shown in Fig. 2(b), surely move to the exposed part in the processing space and adhere to become particles X. As a result, the mosquitoes staying in the exposed part can be knocked down or killed by the insect pest control component sprayed with particles. In addition, even for mosquitoes that invade the treatment space and stay in the exposed part, the pest control effect is exerted, so it can be expelled to the outside of the treatment space. When the particle size of the ejected particles R is less than 10 μm, the particle size is too small, and the amount of the ejected particles R reaching the exposed portion is reduced. Therefore, it becomes difficult to prevent mosquitoes staying on the exposed part or trying to stay. On the other hand, when the particle size exceeds 80 μm, the particle size is too large, and it is difficult to control the behavior of the ejected particles R, and it becomes difficult to properly adhere to the exposed portion. The better particle size of the sprayed particles R is 25~70μm in the 90% particle size of the cumulative volume distribution at 25°C and the spraying distance of 15cm. In Figure 2(b), for the convenience of explanation, in order to distinguish between particle X and particle Y, although particle X is represented by white dots and particle Y is represented by black dots, all particles are the same particles, which are derived from ejection Particle R is the particle. Still, in this embodiment, the sprayed particles of the mosquito control aerosol are 90% of the particle size of the cumulative distribution of the volume at 25°C and the spraying distance of 15cm, using SPRAY TECH (STP5321, Malvern Corporation) measurement.

In addition, the preferable adhesion amount of the sprayed particles R to the exposed part in the processing space is 0.01 to 0.4 mg ^{per 1 m 2} of the exposed part, preferably 0.05 to 0.2 mg ^{per 1 m 2.} If it is in such a range, it can effectively knock down or kill mosquitoes staying in the exposed part. When the adhesion amount is ^{less than 0.01 mg per 1 m 2} , the mosquitoes staying in the exposed part cannot be fully controlled, and it becomes difficult to knock down or kill the mosquitoes. On the other hand, when the adhesion amount ^{exceeds 0.4 mg per 1 m 2} , the pest control effect cannot be greatly improved, and the use amount of the aerosol stock solution also becomes too large, which is economically disadvantageous.

Furthermore, the particle Y is also the same as the particle X mentioned above, and can exert a pest control effect on mosquitoes. Although the particle Y cannot knock down or kill the mosquitoes staying in the exposed part, it can effectively knock down or kill the mosquitoes flying in the processing space. In addition, since it is effective even for mosquitoes that want to invade the treatment space, it becomes possible to suppress the invasion into the treatment space. In this way, the sprayed particles R sprayed in the processing space exist in the state of particle X or particle Y, and each state can be used to effectively knock down or kill mosquitoes in the processing space.

As mentioned above, just after spraying the aerosol stock solution once into the processing space, the sprayed particles R quickly move to the exposed part in the processing space, and become particles X in an attached state and particles X that are not attached to the exposed part and float in the processing space. State particle Y. Even if a short period of time elapses after one spray, the particles X remain attached to the exposed part, and mosquitoes staying in the exposed part can be knocked down or killed by the pest control component. On the other hand, the particles Y uniformly diffuse in the entire processing space, so that the pest control components are gradually Gradually volatilize, it can knock down or kill the mosquitoes flying in the processing space. In addition, mosquitoes that intend to invade the treatment space can be prevented from intruding. In case, even when the mosquitoes have invaded the treatment space, the mosquito stays in the exposed part of the treatment space, or is close to the exposed part, the pest control component of the particles X attached to the exposed part can be used Indeed knock down or die. In this way, in the aerosol for mosquito control of the present invention, the sprayed particles R sprayed from the spray port are present in the most appropriate state (the state of the particle X and the particle Y), and the pest control effect can be maximized. Therefore, it can be said that it is a useful product that can exert an excellent control effect on any of the mosquitoes existing in the treatment space and the mosquitoes that intend to invade the treatment space.

In addition, when the wind blows into the processing space, even if a part of the particles Y is blown away by the wind, there are particles X attached to the exposed part. As mentioned above, since most of the mosquitoes present in the treatment space stay in the exposed part for a long time, if the particles X can exert the desired effect, even if the amount of the particles Y is reduced, there is no need to worry about the impact on the mosquitoes. Poor control effect. Furthermore, in the mosquito control aerosol of the present invention, such as a conventional product, almost all of the sprayed aerosol stock solution does not diffuse into the treatment space. The concentration of the pest control component (that is, the pest control component by the particle Y) diffused in the treatment space reduces the particle X component. According to this, compared with conventional products, the concentration in the treatment space is lower, and the impact on the human body or pets caused by the inhalation of pest control components can be reduced, and safe products can be provided.

With the mosquito control aerosol of the present invention, the effect duration of the pest control component when the aerosol stock solution is sprayed once in the treatment space is preferably 18 hours or more, more preferably 20 for a space below ^{33.3m 3} More than hours. The space below 33.3m ³ includes the living room with 4.5-8 tatami mats (the ceiling height is 2.5m) as mentioned above. Accordingly, in the case of the mosquito control aerosol according to the present invention, the pest control effect can last for about one day in a normal living space such as a general house. Mosquitoes invade the house day and night, especially it is necessary to prevent being sucked blood during bedtime. In the case of the mosquito control aerosol according to the present invention, the effect of the pest control component lasts for more than 20 hours. For example, if sprayed once before going to bed at night, the effect will continue until the next day in the afternoon, and you can sleep comfortably.

<How to control mosquitoes>

The mosquito control method of the present invention is implemented using the aforementioned aerosol for mosquito control. First, in a pressure vessel equipped with a quantitative injection valve, the quantitative injection valve is enclosed in an aerosol containing Byefulin and/or Methelin, which is a pest control ingredient, and a lower alcohol and/or hydrocarbon solvent used as an organic solvent. When the injection button provided with the injection port connected to the quantitative injection valve is pressed once, the aerosol stock solution is injected into the processing space as injection particles R from the injection port (injection step). At this time, as shown in FIG. 2(b), the sprayed particles R quickly move to the exposed part in the processing space, and become particles X in an adhered state and particles Y in a state where they are not adhered to the exposed portion and float in the processing space. Among the sprayed particles R, the particle X knocks down or kills the mosquitoes that stay on the surface of the wall, floor, structure, etc. in the processing space, or even has an effect on the mosquitoes that want to stay in these places. , Drive out of the processing space. On the other hand, among the sprayed particles R, the particle Y can knock down or kill mosquitoes flying in the treatment space, and also exert an effect even for mosquitoes that intend to invade the treatment space, and inhibit the invasion of the treatment space. As for the pest control effect of the sprayed particles R as described above, for ^{a space of 33.3 m 3} or less, it lasts for a long time for 18 hours or more, preferably 20 hours or more. After a specified time has elapsed, it is sufficient to spray the aerosol stock solution in the treatment space again, thereby sustainably knocking down or killing mosquitoes.

Regarding the mosquito control aerosol of the present invention, as described above, the duration of the effect of the pest control component for ^{a space of 33.3 m 3} or less is 18 hours or more, preferably 20 hours or more, that is, about 1 day. Therefore, if the mosquito control method is carried out using this mosquito control aerosol, the spraying step of spraying at the determined time every day can be completed only once a day. In this way, anyone can simply spray the aerosol stock solution into the processing space, and it is possible to prevent missing the spray timing.

[Example]

Regarding the mosquito control aerosol of the present invention, in order to confirm the operation stability and mosquito control effect of the quantitative injection valve after repeated use, a mosquito control aerosol with the characteristic structure of the present invention was prepared (Examples 1-13 ) To test. In addition, for comparison, an aerosol for mosquito control (Comparative Examples 1 to 6 and Reference Examples 1 to 2) that did not have the characteristic structure of the present invention was prepared, and the same test was performed.

As Examples 1-13, the aerosol for mosquito control was prepared with the composition and conditions shown in Table 1, and the test shown below was performed. Still, in Example 2, as a sensitivity-reducing processing aid, IPM (15% by weight) was blended, and in Example 3, as a sensitivity-reducing processing aid, 1,3-butanediol (15 % By weight). In Example 5, as a sensitivity-reducing processing aid, IPM (10% by weight) was blended. For Comparative Examples 1 to 6 and Reference Examples 1 to 2, an aerosol for mosquito control was prepared under the composition and conditions shown in Table 1, and the same test as in the examples was performed. Moreover, even in any aerosol for mosquito control, the stem rubber of the quantitative injection valve is made of acrylonitrile butadiene rubber. In addition, the springs used in the aerosols for mosquito control in Comparative Examples 1 and 2 are conventional springs ("A" in Table 1, wire diameter 0.55mm, transverse elastic coefficient 6.85×10 ⁴ , center diameter 3.15mm, effective The number of turns is 7.75 and the spring constant is 3.24N/mm). The mosquito control aerosols in Examples 1-13, Comparative Examples 3-6 and Reference Examples 1-2 use reinforced springs ("B" in Table 1) , Wire diameter 0.6mm, transverse elastic coefficient 6.85×10 ⁴ , center diameter 3.2mm, effective number of turns 8, elastic constant 4.23N/mm).

(1) The operational stability of the quantitative injection valve after repeated use

The test mosquito control aerosol was repeatedly used, the recovery state of the injection button was investigated, and the operational stability of the quantitative injection valve after repeated use was evaluated according to the following evaluation criteria.

a: After more than 20 uses, the recovery state of the spray button remains unchanged

b: After 3~7 times of use, the recovery state of the spray button deteriorates

c: After using 1~2 times, the recovery state of the spray button is very deteriorated

(2) The control effect on adult mosquitoes

In the center of the closed ^{room of 25m 3} , spray the mosquito control aerosol upwards diagonally once, and then put in 50 female adults of Culex pipiens pallens. After 2 hours of exposure, all the test mosquitoes were recovered. _{At the same time, calculate the KT 50} value (points) of the female adults of Culex pipiens pallens that fall and turn over with the passage of time. After spraying the mosquito control aerosol once in the same room, perform the same operation after 12 hours and 18 hours. In Examples 1 to 10, Comparative Examples 1 to 6 and Reference Examples 1 to 2, the female adults of Culex pipiens pallens used two types of pyrethroid sensitivity system and pyrethroid resistance system. In Examples 11-13, the female adults of Culex pipiens pallens only used the pyrethroid sensitivity system.

(3) Residual rate of sprayed particles in the air

Towards the center of the closed 25m ³ room, spray the mosquito control aerosol diagonally upward once. Install an air collection tube (fill the glass tube with silica gel and fill both ends with absorbent sponge) 50cm behind the center of the room (130cm from the wall) and 120cm on the floor, and connect it to the vacuum pump After spraying, a specified amount of air is sucked after 2 hours. The air collection tube was washed with acetone, and the amount of the collected pest control components was analyzed by gas chromatography (manufactured by Shimadzu Corporation, model GC1700). Based on the obtained analysis value, the air concentration (weight basis) of the pest control component is calculated, and the ratio to the theoretical air concentration is calculated as the residual rate in the air.

Table 2 shows the test results of (1) to (3) above.

In Examples 1 to 13 where the quantitative injection valve uses a reinforced spring with an elastic constant of 3.3N/mm or more, after using it more than 20 times, the recovery state of the injection button does not change, and the operation of the quantitative injection valve after repeated use is stable. Good sex. On the other hand, in Comparative Examples 1 and 2 of the conventional spring with elastic constant less than 3.3N/mm for the quantitative injection valve, the recovery state of the injection button has deteriorated after 3-7 times of use, and it is impossible to say the quantitative after repeated use. The operation stability of the injection valve is particularly good. Also, as in Comparative Example 3, even if Using a reinforced spring with an elastic constant of 3.3N/mm or more and using methyl ethyl ketone as an organic solvent, the recovery state of the ejection button is very deteriorated after using it for 1 or 2 times, which may cause poor ejection. status. This is believed to be because methyl ethyl ketone deteriorates the acrylonitrile butadiene rubber and reduces the elasticity of the valve stem rubber. In this way, it is a very important research project to understand that the material of the valve stem rubber and the suitability of the organic solvent are extremely important. Even if a reinforced spring with an elastic constant of 3.3N/mm or more is used, the organic solvent will have an adverse effect on the acrylonitrile butadiene rubber. Otherwise, the operating stability of the quantitative injection valve after repeated use cannot be improved.

Regarding the control effect on adult mosquitoes, the examples 1 to 13 were confirmed. After spraying once aerosol for mosquito control containing Byefulin and/or Metternin as pest control components, the KT ₅₀ value was also maintained after 18 hours. Significant value, showing excellent mosquito control effect. In addition, I learned that Example 1, using ethanol as the organic solvent, Example 4 using isopropanol as the organic solvent, and Example 10 using Neothiozole as the organic solvent, are based on the blending amount of Fulin The same, but because the mosquito control effect of Examples 1 and 4 is excellent, especially the mosquito control effect of Example 1 is even more excellent, so the organic solvent, lower alcohol and/or hydrocarbon combined with Byfulin as a pest control component Among the solvents, lower alcohols (ethanol or isopropanol) with carbon numbers of 2 to 3 are effective. Among them, ethanol is more effective.

Furthermore, in Example 1 without blending the sensitivity-reducing processing aid, and Examples 2 to 3 in which the sensitivity-reducing processing aid was blended, although the blending amount of Befulin was the same, in Examples 2 to 3, Even compared to the pale color of the pyrethroid resistance system which reduces the sensitivity to pyrethroid compounds For Culex mosquitoes, compared with the case where the pyrethroid sensitivity system was used as the target, the degree of reduction in the control efficacy was smaller than that of Example 1. From this, it can be confirmed that higher fatty acid esters such as isopropyl myristate or glycols with carbon numbers of 3-6 such as 1,3-butanediol are blended as sensitivity-reducing processing aids for control The pyrethroid resistance system is extremely effective in mosquitoes. Still, in Reference Examples 1~2 using perfluthrin as a pest control ingredient, the control effect of Culex pipiens pallens in the pyrethroid resistance system and the case where the pyrethroid sensitivity system is the target In comparison, it is significantly inferior, and this degree of reduction cannot be improved even if it is blended with isopropyl myristate. According to this, for the mosquitoes of the pyrethroid resistance system, Byfulin is still effective, and it also judges the higher fatty acid esters such as isopropyl myristate or the carbon number of 1,3-butanediol. It is a diol of 3-6, and it is particularly useful as a sensitivity reduction processing aid when combined with Bayfulin as a pest control component.

On the other hand, in Comparative Example 3 using methyl ethyl ketone as the organic solvent, after spraying the mosquito control aerosol once, after 18 hours, the KT ₅₀ value became 120 minutes or more. Those who have the effect of preventing and controlling mosquitoes. The volume ratio (a/b) of the aerosol stock solution (a) to the propellant (b) is out of the range of 6/94-50/50 in Comparative Examples 4~5, or the ejection volume when the injection button is pressed once is out of 0.1 In Comparative Example 6 in the range of ~1.0mL, after spraying the aerosol for mosquito control once, the KT ₅₀ value became 120 minutes or more after 12 hours, which did not exhibit the mosquito control effect over a long period of time.

[Industrial availability]

According to the present invention, it is possible to provide an aerosol for mosquito control that has a high control effect on mosquitoes and a mosquito control method using the aerosol.

10: Valve mechanism

11: Stem

12: Valve stem rubber

13: Spring (strengthening spring)

20: shell

21: Quantitative Room

100: quantitative injection valve

Claims (8)

An aerosol for mosquito control, which is an aerosol for mosquito control with a pressure-resistant container, a quantitative injection valve, and a spray button. The pressure-resistant container is enclosed with a pest control component containing Transfluthrin and/ Or Metofluthrin and organic solvent with carbon number 2~3 lower alcohol and/or aerosol stock solution and propellant of hydrocarbon solvent. The quantitative injection valve has a valve with stem and stem rubber and spring. Mechanism and a housing accommodating the valve mechanism, and assembled in the mouth of the pressure-resistant container, the injection button is provided with an injection port connected to the quantitative injection valve, and is characterized by the aerosol stock solution (a) and the propellant ( b) The capacity ratio (a/b) is 6/94~50/50, the material of the valve stem rubber is acrylonitrile butadiene rubber, the elastic constant of the spring is 3.3N/mm or more, press the aforementioned button once The ejection volume at the time of the ejection button is 0.1~1.0mL, and the particle size of the ejected particles ejected from the foregoing ejection port is 10~80μm at 25°C and the 90% particle size of the cumulative volume distribution of the ejection distance of 15cm. The aerosol for mosquito control described in claim 1, wherein the pest control component is Transfluthrin. The mosquito control aerosol described in claim 1 or 2, wherein when the aerosol stock solution is sprayed once in the treatment space, the residual rate of the pest control component in the air after 2 hours is 0.05 to 5%, In addition, the duration of the effect of the aforementioned pest control component is 18 hours or more for a space of ^{33.3 m 3 or less.} The mosquito control aerosol according to claim 1 or 2, wherein the particle size of the sprayed particles sprayed from the spraying port is 90% of the particle size of the cumulative volume distribution at 25°C and the spraying distance of 15 cm. 70μm. The mosquito control aerosol described in claim 1 or 2, wherein the spray volume when the spray button is pressed once is 0.1 to 0.2 mL. The mosquito control aerosol described in claim 1 or 2, wherein the spray amount of the pest control component when the spray button is pressed once is 5.0 to 30 mg ^{per 18.8 to 33.3 m 3 of processing space.} The aerosol for mosquito control as described in claim 2, wherein the aerosol stock solution is used as the sensitivity reduction processing aid of Transfluthrin and contains higher fatty acid esters with a total number of carbons of 13-20 And/or diols with 3-6 carbon atoms. A method for controlling mosquitoes, which uses an aerosol for controlling mosquitoes as described in any one of Claims 1 to 7, and spraying the aerosol stock solution in a treatment space to knock down or kill the mosquitoes.

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