Aerosol product for exterminating creeping insect pest

Abstract

To provide an aerosol product for exterminating a creeping insect pest capable of being used safely to any place in a room, high in versatility, and facilitating extermination treatment dispensing with a big apparatus.SOLUTION: An aerosol product for exterminating a creep insect pest includes: an insecticidal active constituent for exterminating a creeping insect pest; a solvent for dissolving the insecticidal active constituent; a jetting agent for jetting the insecticidal active constituent and the solvent; and an aerosol container for housing the insecticidal active constituent, the solvent, and the jetting agent, where the weight ratio (liquid:jetting agent) of the jetting agent housed in the aerosol container and liquids other than the jetting agent is set so as to be within the range of 8:92-30:70, the aerosol container is quantitative injection type, and provided with a push-down type operational button fitting to a jetting pipe that the aerosol container has, and the operational button has a nozzle part communicating with the jetting pipe.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for exterminating crawling pests, and in particular to a technical field related to an aerosol that is effective against cockroaches hiding deep in gaps indoors. [Background technology]

[0002] For example, cockroaches may hide in narrow gaps in a room and build nests or breed on the back or underside of furniture, electrical appliances, etc. As a device for exterminating cockroaches hiding in such narrow places, for example, a sanitary pest repellent device disclosed in Patent Document 1 is known. In Patent Document 1, a drug diffusion table ring is provided on the bottom of furniture, electrical appliances, etc., a space for diffusing a repellent drug is partitioned and formed inside the drug diffusion table ring, and the repellent drug is sprayed into the space inside the drug diffusion table ring by a spray nozzle. An aerosol container containing the repellent drug is connected to the spray nozzle by a connecting tube, and the repellent drug in the aerosol container is sprayed from the spray nozzle through the connecting tube into the space inside the drug diffusion table ring. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-164248 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, since the drug diffusion ring of the device in Patent Document 1 is attached to the bottom of furniture, electrical appliances, etc., the repellent drug does not reach the back of the furniture, for example. Therefore, it is considered that the device in Patent Document 1 is hardly effective against cockroaches hiding behind the furniture.

[0005] In addition, since the drug diffusion table ring can be installed only when furniture, etc. is actually installed, it is difficult to install the device of Patent Document 1 after the furniture, etc. is installed. In addition, the drug diffusion table ring must be prepared according to the shape and size of the furniture, which is a problem of low versatility.

[0006] Furthermore, the device of Patent Document 1 is a large-scale device because, in addition to the drug diffusion table ring, it requires a spray nozzle corresponding to the size of the drug diffusion table ring, a connecting tube for connecting the aerosol container and the spray nozzle, etc.

[0007] Furthermore, when spraying the repellent in a closed space such as a room, it is preferable from the standpoint of safety to spray the amount of repellent at one time equal to or less than a specified amount.

[0008] The present invention has been made in consideration of the above points, and its object is to provide a highly versatile extermination device that can be used safely anywhere in a room, and that does not require large-scale equipment, making extermination easier. [Means for solving the problem]

[0009] In order to achieve the above object, in the present invention, the ratio of propellant contained in the aerosol container is increased, the vapor pressure of the solvent that dissolves the insecticidal active ingredient is lowered, and the evaporation rate of the solvent that forms the particles sprayed from the aerosol container is slowed down, thereby allowing the particles to fly over a wide area.

[0010] The first invention is With an insecticidal active ingredient that exterminates cockroaches, A solvent in which the insecticidal active ingredient is soluble; a propellant for spraying the insecticidal active ingredient and the solvent; An aerosol product for exterminating cockroaches, comprising an aerosol container containing the insecticidal active ingredient, the solvent, and the propellant, The vapor pressure of the above solvent at 25°C is 7.0 kPa or less, a weight ratio of the propellant contained in the aerosol container to a liquid other than the propellant is set within a range of 8:92 to 30:70 in terms of the liquid:propellant; The aerosol container has a nozzle portion and is a fixed-quantity spray type that sprays a predetermined amount of the insecticidal active ingredient and the solvent from the nozzle portion into the gap between a wall and furniture in a room or into the gap between a wall and an electrical appliance in a room with a single operation of a spray button.

[0011] According to this configuration, the weight ratio of the liquid to the propellant is within the range of 8:92 to 30:70, resulting in a formulation rich in propellant. As a result, when the liquid containing the insecticidal active ingredient and the solvent is sprayed from the aerosol container, it is easy to form small particles, and the momentum of the particles is strong, and the sprayed particles fly over a wide area and tend to drift in the air. Furthermore, since the vapor pressure of the solvent at 25°C is 7.0 kPa or less, which is sufficiently low, the evaporation rate of the solvent forming the sprayed particles is slow, which causes the particles to fly farther and to remain floating in the air for a longer period of time. Therefore, for example, assuming a case where the spray is sprayed between a wall and furniture, the particles containing the insecticidal active ingredient fly along the side of the furniture to the back, then fly around to the back of the furniture, drift in the air, and then fall to the vicinity of the bottom of the furniture due to their own weight. In this way, the particles fly over a wide area even in a narrow gap, so the effectiveness of the insecticidal active ingredient is exerted over a wide area without the need for a large-scale device.

[0012] In addition, because the aerosol container is of the fixed-volume type, even if the particles fly over a wide area as described above, the amount of the insecticidal active ingredient will not be more than the specified amount, which increases safety and makes handling easier. Furthermore, since the place of use is not limited to under furniture, as in the past, versatility is increased.

[0013] The second invention is the first invention, The insecticidal active ingredient is characterized in that it is at least one of cyphenothrin, cyfluthrin, and tralomethrin.

[0014] According to this constitution, even if the amount of the insecticidal active ingredient is small, high efficacy against crawling pests can be obtained.

[0015] The third invention is the first or second invention, The amount of the insecticidal active ingredient sprayed by one operation of the spray button is set to 3 mg or more and 20 mg or less.

[0016] According to this configuration, since 3 mg or more of the insecticidal active ingredient is sprayed in one spray operation, even if the particles fly over a wide area, the insecticidal active ingredient contained in each particle is sufficiently secured and high efficacy is obtained. On the other hand, since the insecticidal active ingredient sprayed in one spray operation is 20 mg or less, high safety is secured when used, for example, in a closed room.

[0017] The fourth invention is any one of the first to third inventions, The solvent is characterized in that it is at least one of isopropyl myristate and a saturated hydrocarbon solvent.

[0018] That is, while ethanol (vapor pressure 7.91 kPa at 25°C) is a commonly used solvent, the use of isopropyl myristate and a saturated hydrocarbon solvent makes the vapor pressure of the solvent lower than that of ethanol. This makes the evaporation rate of the solvent that forms the sprayed particles slower, and the time that the particles remain suspended in the air longer.

[0019] The fifth invention is any one of the first to fourth inventions, The amount of the liquid other than the propellant sprayed by one operation of the spray button is set to be 0.1 ml or more and 0.4 ml or less.

[0020] The sixth invention is a composition comprising an insecticidal active ingredient for exterminating cockroaches, A solvent in which the insecticidal active ingredient dissolves and has a vapor pressure of 7.0 kPa or less at 25°C that is lower than that of ethanol; The insecticidal active ingredient and a propellant for spraying the solvent are contained in a constant-amount spray type aerosol container which sprays a predetermined amount of the insecticidal active ingredient and the solvent with a single operation of a spray button, and the weight ratio of the propellant to a liquid other than the propellant is set to be within a range of 8:92 to 30:70 when the liquid:propellant is taken as the weight ratio; This is a method for exterminating creeping pests, in which a predetermined amount of the insecticidal active ingredient and the solvent are sprayed upward from the nozzle of the aerosol container into the gap between a room wall and furniture or into the gap between a room wall and an electrical appliance. Effect of the Invention

[0021] According to the first and sixth inventions, the ratio of propellant in the aerosol is increased, and the vapor pressure of the solvent that dissolves the insecticidal active ingredient is lowered to slow the evaporation rate of the solvent that forms the sprayed particles, so that the particles can be sprayed over a wide area, and the effectiveness of the insecticidal active ingredient can be exerted over a wide area without the need for a large-scale device. Also, since the aerosol container is a fixed-amount spray type, the amount of the insecticidal active ingredient is never sprayed more than the specified amount. Therefore, it can be used safely anywhere in the room, making it highly versatile, and it does not require a large-scale device, making the extermination process easier.

[0022] According to the second invention, the insecticidal active ingredient is at least one of cyphenothrin, cyfluthrin and tralomethrin, so that even if the amount of the insecticidal active ingredient is small, it is highly effective against crawling pests, and the amount sprayed per operation of the spray button can be reduced.

[0023] According to the third aspect of the invention, the amount of insecticidal active ingredient sprayed per operation of the spray button is 3 mg or more and 20 mg or less, so that high safety can be ensured while obtaining high efficacy of the insecticidal active ingredient.

[0024] According to the fourth invention, the solvent is at least one of isopropyl myristate and a saturated hydrocarbon solvent, so that the time that the particles sprayed from the aerosol container remain suspended in the air can be further extended, further enhancing the efficacy of the insecticidal active ingredient.

[0025] According to the fifth aspect of the present invention, the method can be used safely anywhere in a room, has high versatility, and can facilitate extermination treatment by eliminating the need for a large-scale device. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a perspective view of an aerosol product for controlling creeping pests. [Diagram 2] FIG. 1 is a schematic diagram illustrating a test environment in a test room. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. Note that the following description of the preferred embodiments is merely illustrative in nature and is not intended to limit the present invention, its applications, or its uses.

[0028] 1 is a perspective view of an aerosol product 1 for exterminating crawling pests according to an embodiment of the present invention. The aerosol product 1 for exterminating crawling pests includes an aerosol container 10, a push-down operation button (spray button) 20, a cylindrical base 30 attached to the aerosol container 10, and a cylindrical cover 40 attached to the cylindrical base 30. The aerosol product 1 is configured such that, by rotating the operation button 20 and the cylindrical cover 40, the operation button 20 can be switched between a push-down state in which it is possible to push it down and a non-pull-down state in which it is not possible to push it down.

[0029] In addition, in the description of this embodiment, the left and right sides as seen by the user when holding the device in their hands will be referred to simply as "left" and "right", respectively, the side that is closer to the user as seen by the user will be referred to simply as "rear", and the side that is further away from the user as seen by the user will be referred to simply as "front".

[0030] The peripheral wall of the aerosol container 10 is translucent, so that the remaining amount of the contents can be grasped from the outside. A constant-amount injection valve mechanism (not shown) is provided at the top of the aerosol container 10. This valve mechanism has a discharge pipe (not shown) that moves in the vertical direction and discharges the contents contained in the aerosol container 10, a biasing member (not shown) made of a spring or the like that biases the discharge pipe upward, and a valve body (not shown). The discharge pipe is in a position that extends in the vertical direction, and when it is at the upper end position, the lower end (upstream end) of the discharge pipe is closed by the valve body so that the inside of the aerosol container 10 and the discharge pipe are not in communication, while when the discharge pipe is pushed downward from the upper end position, the lower end of the discharge pipe is opened, the inside of the aerosol container 10 and the discharge pipe are in communication, and the contents are discharged from the upper end of the discharge pipe. In addition, when the discharge pipe is pushed once, the lower end of the discharge pipe is opened instantaneously and then closed, and only a small amount (predetermined amount) of the contents is sprayed. That is, this aerosol container 10 is a fixed-dose spray type. Note that as the fixed-dose spray type aerosol container 10, for example, the container described in JP 2014-28631 A can be used.

[0031] The operation button 20 can be obtained, for example, by injection molding a resin material, and is molded as a single unit. The operation button 20 fits onto the upper side of the discharge tube of the aerosol container 10 to push and operate the discharge tube, and has a button body 21 and a nozzle part 23. The nozzle part 23 protrudes from the front part of the button body 21.

[0032] The nozzle portion 23 protrudes forward in a direction intersecting with the center line of the discharge pipe, and is inclined so that it is positioned higher as it approaches the front. The base end side of the nozzle portion 23 communicates with the discharge pipe 13 of the aerosol container 10. The inclination angle of the nozzle portion 23 can be set, for example, in the range of 5 degrees to 45 degrees between the center line of the discharge pipe and a plane perpendicular thereto. By inclining the nozzle portion 23, it becomes possible to effectively discharge the contents obliquely upward.

[0033] The cylindrical base 30 extends in the vertical direction and is formed into a cylindrical shape having an outer diameter approximately equal to the outer diameter of the vertical middle part of the aerosol container 10. The lower end of the cylindrical base 30 is entirely open, and the upper part of the aerosol container 10 is inserted from the lower end of the cylindrical base 30 and fixed.

[0034] The cylindrical cover 40 is formed so as to surround the periphery of the operation button 20, and is attached to the cylindrical base 30. That is, the lower side of the cylindrical cover 40 fits into the upper side of the cylindrical base 30. In this state, the outer peripheral surface of the button body 21 of the operation button 20 is covered by the cylindrical cover 40. In addition, the nozzle portion 23 of the operation button 20 protrudes forward from a notch portion 41 provided in the front part of the cylindrical cover 40.

[0035] The contents contained in the aerosol container 10 are an insecticidal active ingredient for exterminating crawling pests, a solvent in which the insecticidal active ingredient dissolves, and a propellant for spraying the insecticidal active ingredient and the solvent. The contents may contain drugs other than the insecticidal active ingredient, the solvent, and the propellant. For example, a repellent for crawling pests, a fragrance, a bactericide, a disinfectant, etc. may be mixed into the contents. The type of repellent for crawling pests is not particularly limited, but it may be any one that has the effect of repelling crawling pests.

[0036] The insecticidal active ingredient is an ingredient that exerts an insecticidal effect against crawling pests, and various chemicals used as insecticides can be used. In this embodiment, a synthetic pyrethroid can be used, specifically, at least one of cyphenothrin, cyfluthrin, and tralomethrin can be used, and these may be used in combination. By using at least one of cyphenothrin, cyfluthrin, and tralomethrin, sufficient efficacy can be obtained even if the amount of the insecticidal active ingredient sprayed is small compared to the case of using, for example, imiprothrin, phthalthrin, and resmethrin.

[0037] The solvent is preferably one in which the insecticidal active ingredient dissolves and has a vapor pressure lower than that of ethanol. The vapor pressure of the solvent is preferably 7.0 kPa or less at 25°C, more preferably 4.5 kPa or less at 25°C, and even more preferably 1.9 kPa or less at 25°C. Moreover, a solvent having a vapor pressure of 0.7 kPa or less at 25°C is most preferable. As such a solvent, for example, at least one of isopropyl myristate and a saturated hydrocarbon solvent can be used, and these may be used in combination.

[0038] Examples of the solvent include propanol (vapor pressure at 25° C.: 4.41 kPa), water (3.2630 kPa), octane (1.8874 kPa), and nonane (6.177×10 2 Pa), dodecane (1.80×10 Pa), tridecane (7.5 Pa), isopropyl myristate (1.247×10 -2 Examples of the solvent include, but are not limited to, various solvents having a vapor pressure in the above range can be used. The solvent may be used alone or in combination of two or more types.

[0039] When the vapor pressure of the solvent at 25°C exceeds 7.0 kPa, the evaporation rate of the solvent forming the sprayed particles becomes faster, and the mass of each particle decreases early, so that the flying distance of the particles is shortened and the time spent floating in the air is shortened. This means that the efficacy is reduced. On the other hand, when the vapor pressure of the solvent at 25°C is 7.0 kPa or less, the vapor pressure is sufficiently low, so that the evaporation rate of the solvent forming the sprayed particles is slow, and the particles fly farther and the time spent floating in the air is longer. In particular, when the vapor pressure at 25°C is 1.9 kPa or less, the flying distance of the particles is significantly longer and the time spent floating in the air is also significantly longer, which is preferable.

[0040] The propellant may be liquefied petroleum gas (LPG), dimethyl ether (DME), or the like, or a mixture of these may be used.

[0041] As described above, the aerosol container 10 contains a propellant and a liquid other than the propellant. The weight ratio of the propellant to the liquid other than the propellant is set to be within a range of 8:92 to 30:70 when the liquid:propellant is used, and the aerosol product 1 for controlling crawling pests is formulated with a rich propellant. As a result, when the liquid containing the insecticidal active ingredient and the solvent is sprayed from the aerosol container 10, it is likely to become small particles, the momentum of the particles is strong, and the sprayed particles fly over a wide area and tend to float in the air.

[0042] That is, when the amount of propellant is less than the ratio where the weight ratio of the liquid:propellant is 30:70, the particles become larger when the liquid containing the insecticidal active ingredient and the solvent is sprayed from the aerosol container 10, and as a result, the weight of each particle becomes heavier, making it difficult for the particles to float in the air and causing them to fall before flying over a wide area. In addition, when the amount of propellant is less than the ratio where the weight ratio of the liquid:propellant is 30:70, in other words, the amount of the liquid becomes greater, but when the amount of the liquid becomes greater than the weight ratio, the amount of the liquid sprayed at one time becomes too large, which also makes the weight of each particle heavy and makes it difficult for the particles to float in the air. On the other hand, when the amount of propellant is more than the ratio where the weight ratio of the liquid:propellant is 8:92, the amount of the liquid sprayed at one time becomes too small, so the particles do not fly over a wide area and densely, and the effect of the insecticidal active ingredient is reduced. Therefore, assuming a propellant-rich formulation, the weight ratio of the liquid to the propellant is preferably set within the range of 8:92 to 30:70, more preferably within the range of 10:90 to 20:80, and even more preferably within the range of 15:85 to 17:83.

[0043] The amount of insecticidal active ingredient sprayed per one operation of the operation button 20 (hereinafter also referred to as Ai amount) is set to 3 mg or more and 20 mg or less. The Ai amount can be set within the above range by changing the content of the insecticidal active ingredient and the amount of the liquid sprayed per one operation of the operation button 20. If the Ai amount is less than 3 mg, the amount of insecticidal active ingredient sprayed into the space will be too small, reducing the effect of the insecticidal active ingredient. On the other hand, if the Ai amount is more than 20 mg, too much insecticidal active ingredient will be sprayed into the space, which may be undesirable from the standpoint of safety, especially in a narrow space.

[0044] In addition, the amount of the liquid (insecticidal active ingredient and solvent) sprayed by one operation of the operation button 20 is set to 0.1 ml or more and 0.4 ml or less. The amount of the liquid sprayed by one operation of the operation button 20 can be set within the above range by, for example, changing the structure of the valve mechanism. If the amount of the liquid sprayed by one operation of the operation button 20 is less than 0.1 ml, the amount of the insecticidal active ingredient sprayed into the space will be too small, reducing the effect of the insecticidal active ingredient. On the other hand, if the amount of the liquid sprayed by one operation of the operation button 20 is more than 0.4 ml, the amount of the insecticidal active ingredient sprayed into the space will be too large, which may be undesirable from the standpoint of safety, especially in a narrow space.

[0045] Next, a case where the aerosol product 1 for exterminating creeping pests configured as described above is used will be described. The aerosol product 1 for exterminating creeping pests may be sprayed all over the room, but it is preferable to spray it into gaps in the room where creeping pests are likely to be hiding. That is, the nozzle portion 23 of the aerosol product 1 for exterminating creeping pests is aimed at a narrow gap between a wall and furniture in the room, or a narrow gap between a wall and an electrical appliance, and then the operation button 20 is operated. It is preferable to operate the operation button 20 only once, but if the room is large, it may be operated multiple times.

[0046] As a result, the pressure of the propellant contained in the aerosol container 10 causes the insecticidal active ingredient and the solvent to be sprayed together with the propellant from the nozzle portion 23. At this time, since the weight ratio is set as described above and the propellant is rich in the formulation, when the liquid containing the insecticidal active ingredient and the solvent is sprayed from the aerosol container 10, it is easy to become small particles, the momentum of the particles is strong, and the sprayed particles fly over a wide area and tend to drift in the air. Furthermore, since the vapor pressure of the solvent is low, the evaporation rate of the solvent forming the sprayed particles is slow, which causes the particles to fly farther and to remain floating in the air for a longer period of time. Therefore, after the particles containing the insecticidal active ingredient fly deep along the side of the furniture or electrical appliance, they go around to the back side of the furniture or electrical appliance, fly along the back side, drift in the air, and then fall to the vicinity of the bottom due to their own weight. In this way, the particles fly over a wide area even in a narrow gap, so the effectiveness of the insecticidal active ingredient is exerted over a wide area without the need for a large-scale device.

[0047] The height of the nozzle part 23 during spraying is preferably about 100 cm from the floor surface. If the nozzle part 23 is too low, the amount of particles diffusing upward decreases, making it difficult for the particles to wrap around to the back side.

[0048] In addition, since the aerosol container 10 is a fixed-volume spray type, even if the particles fly over a wide area as described above, the amount of the insecticidal active ingredient will not be more than the specified amount, which increases safety and makes handling easier. Furthermore, since the place of use is not limited to under furniture, as in the past, versatility is increased.

[0049] Next, the results of the efficacy test of the aerosol product 1 for controlling crawling pests will be described. The efficacy test was carried out in a peat chamber 100 as shown in Fig. 2. The peat chamber 100 has a cubic shape with each side measuring 180 cm and a volume of 5.82 m. 3In the peat chamber 100, three pieces of furniture 102, 102, 102 are reproduced using multiple cardboard boxes 101. The dimensions of each piece of furniture 102 are 52 cm deep, 160 cm high, and 52 cm wide. The gap between adjacent pieces of furniture 102, 102 is set to 5 cm. The gap between the side of the furniture 102 located on the left in FIG. 2 and the wall of the peat chamber 100 is set to 5 cm, and the gap between the back of the furniture 102 and the wall of the peat chamber 100 is also set to 5 cm. Although furniture is assumed in FIG. 2, the present invention is not limited to this, and may be an electrical appliance (for example, a refrigerator or a washing machine).

[0050] The nozzle portion 23 of the aerosol product 1 for exterminating creeping pests is directed toward the gap between the side of the furniture 102 located on the left side of Fig. 2 and the wall of the peat chamber 100. The height of the nozzle portion 23 from the floor surface is set to 100 cm.

[0051] The first mesh bag 104 is placed 50 cm away from the tip of the nozzle part 23 toward the back of the gap, and the first mesh bag 104 is attached to the wall of the peat chamber 100. Similarly, the second mesh bag 105 is placed 100 cm away from the tip of the nozzle part 23 toward the back of the gap (the back side of the furniture 102), the third mesh bag 106 is placed 150 cm away from the tip of the nozzle part 23 toward the back of the gap, the fourth mesh bag 107 is placed 200 cm away from the tip of the nozzle part 23 toward the back of the gap, and the fifth mesh bag 108 is placed 250 cm away from the tip of the nozzle part 23 toward the back of the gap. The heights of the first to fifth mesh bags 104 to 108 are lowered with increasing distance from the tip of the nozzle part 23, and the fifth mesh bag 108 is placed near the floor surface of the peat chamber 100.

[0052] Ten adult female Smoky Brown cockroaches are placed as test insects in each of the first to fifth mesh bags 104 to 108. The first to fifth mesh bags 104 to 108 are designed to allow easy circulation of air.

[0053] Thereafter, the operator operates the operation button 23. The amount of the liquid other than the propellant that is sprayed by one operation of the operation button 20 is set to 0.2 ml.

[0054] After spraying, the mixture was left for 5 minutes, and after 5 minutes had passed, the first to fifth mesh bags 104 to 108 were collected and the test insects were taken out. The test insects were transferred to a clean container and given sugar water. The mortality rate was calculated 48 hours after they were transferred to the container.

[0055] [Table 1]

[0056] In Examples 1 to 10 of the present invention and Comparative Examples 1 to 10, the Ai amount, type of solvent, type of propellant, and liquid-gas ratio are set as shown in Table 1. The solvent "IPM" is isopropyl myristate, and "Neothio" is Neothiosol (manufactured by Chuo Kasei Co., Ltd.) as a saturated hydrocarbon solvent. The "liquid-gas ratio" is the weight ratio of the liquid to the propellant. The 48-hour mortality rate (%) was calculated by (dead test insects / total test insects)×100. "50 cm", "100 cm", "150 cm", "200 cm", and "250 cm" are the distances from the tip of the nozzle portion 23, and indicate the locations where the first to fifth mesh bags 104 to 108 are arranged. In other words, the mortality rate at "50 cm" is the mortality rate of the test insects in the first mesh bag 104, the mortality rate at "100 cm" is the mortality rate of the test insects in the second mesh bag 105, the mortality rate at "150 cm" is the mortality rate of the test insects in the third mesh bag 106, the mortality rate at "200 cm" is the mortality rate of the test insects in the fourth mesh bag 107, and the mortality rate at "250 cm" is the mortality rate of the test insects in the fifth mesh bag 108. Note that "-" indicates that the mortality rate was not obtained.

[0057] In Examples 1 to 10, the weight ratio of the liquid to propellant was within the range of 8:92 to 30:70, and the vapor pressure of the solvent at 25°C was 7.0 kPa or less, lower than that of ethanol, so that a fatality rate of 80% or more was achieved even at a distance of 250 cm from the tip of the nozzle portion 23.

[0058] On the other hand, the only difference between Comparative Example 1 and Example 1 is the weight ratio of the liquid to the propellant, which is set to 6:94. In Comparative Example 1, the mortality rate at a distance of 250 cm from the tip of the nozzle part 23 is only 30%. This is because there was too much propellant, and the amount of the liquid sprayed at one time was too small, so the particles could not be dispersed densely over a wide area, significantly reducing the effect of the insecticidal active ingredient.

[0059] In Comparative Examples 2 and 3, the solvent was ethanol, but in Comparative Example 2, the fatality rate was only 60% at a distance of 250 cm from the tip of the nozzle part 23, and in Comparative Example 3, the fatality rate was only 50% at a distance of 250 cm from the tip of the nozzle part 23. This is because the vapor pressure of ethanol is high, so the sprayed particles evaporated before they could fly far, shortening the distance the particles could fly.

[0060] In Comparative Example 4, the solvent is ethanol, and the weight ratio of the liquid to the propellant is set to 50:50. In Comparative Example 4, the fatality rate at a distance of 250 cm from the tip of the nozzle portion 23 is only 20%. This is because, due to the vapor pressure of ethanol described above and because the propellant is not rich, the liquid is less likely to become small particles when sprayed from the aerosol container 10, and the sprayed particles are less likely to fly over a wide area.

[0061] In Comparative Example 5, the weight ratio of the liquid to the propellant is set to 50:50. In Comparative Example 5, the fatality rate at a distance of 250 cm from the tip of the nozzle portion 23 is only 20%. This is because the propellant is not rich, so the liquid is less likely to break into small particles when sprayed from the aerosol container 10, and the sprayed particles are less likely to fly over a wide area. Similarly, the fatality rate is worse in Comparative Example 6.

[0062] In Comparative Examples 7 to 9, since the solvent is ethanol, the lethality rate worsens even if the weight ratio of the liquid:propellant is changed.

[0063] In Comparative Example 10, the weight ratio of the liquid to the propellant is set to 40:60, but because the amount of propellant is small, the particles are less likely to fly, resulting in a poor lethality rate.

[0064] As described above, the solvent vapor is low and the weight ratio of liquid to propellant is set within the range of 8:92 to 30:70, so that sufficient extermination effect can be obtained against crawling pests hiding deep in gaps. The above efficacy test is performed only on Smoky Brown cockroaches, but as is clear from Examples 1 to 10, the insecticidal active ingredient is attached not only to the Smoky Brown cockroach in front of the gap but also to the Smoky Brown cockroach in the back, so that sufficient extermination effect can be obtained against crawling pests other than Smoky Brown cockroaches, such as American cockroaches, German cockroaches, centipedes, etc.

[0065] The above-described embodiment is merely illustrative in all respects and should not be construed as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention. [Industrial Applicability]

[0066] INDUSTRIAL APPLICABILITY As described above, the aerosol product for exterminating crawling pests and the method for exterminating crawling pests according to the present invention can be used, for example, to exterminate crawling pests such as cockroaches indoors. [Explanation of symbols]

[0067] 1. Aerosol products for controlling creeping pests 10 Aerosol containers 20 Operation button (jet button)

Claims

[Claim 1] Insecticidal active ingredients that eliminate creeping insects, A solvent in which the above insecticidal active ingredient dissolves, The above-mentioned insecticidal active ingredient and the above-mentioned solvent are provided as propellants for spraying, In an aerosol product for controlling crawling insects, comprising the above-mentioned insecticidal active ingredient, the above-mentioned solvent, and an aerosol container containing the above-mentioned propellant, The above aerosol container is a metered-discharge type, An aerosol product for controlling crawling insects, wherein the amount of the above-mentioned insecticidal active ingredient sprayed with a single operation of the spray button is 3 mg to 20 mg.

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