JP2018012676A - Creeping insect pest-controlling aerosol product and creeping insect pest-controlling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform a controlling treatment which can be used safely everywhere in a room and has high general purpose property without need for large sized devices.SOLUTION: Weight ratio of an insecticidal active ingredient and a solvent, and a propellant accommodated in an aerosol container 10 is set in a range of 8:92 to 30:70. The aerosol container 10 is a quantitative injection type which injects the insecticidal active ingredient and the solvent at a specified quantity by one operation of an operation button 20. Steam pressure of the solvent is set at lower than ethanol.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a pest control aerosol product and a pest control method for controlling a pest such as a cockroach, and particularly relates to an aerosol that is effective against a pest that lurks in the interior of a space in a room. It belongs to the technical field.

  For example, cockroaches lurk in narrow gaps in the room and sometimes nest and breed on the back and bottom of furniture and electrical appliances. As a device for exterminating cockroaches lurking in such a narrow place, for example, a sanitary insect repellent device disclosed in Patent Document 1 is known. In Patent Document 1, a drug diffusion pedestal ring part is provided in the lower part of furniture, electrical appliances, etc., a space for diffusing repellent drugs is defined inside the drug diffusion pedestal ring part, and an injection nozzle is formed in the space within the drug diffusion pedestal ring By spraying repellent drugs. An aerosol container containing a repellent drug is connected to the spray nozzle by a connecting tube so that the repellent drug in the aerosol container is sprayed from the spray nozzle to the space in the drug diffusion bed through the connecting tube. It has become.

JP 2003-164248 A

  However, since the medicine diffusion pedestal portion of the apparatus of Patent Document 1 is provided in the lower part of furniture, electrical appliances, etc., for example, the repellent medicine does not reach the back of the furniture. Therefore, in the case of the device of Patent Document 1, it is considered that the cockroach lurking behind the furniture hardly has any effect.

  Moreover, since it is only when installing furniture etc. that a chemical | medical agent diffusion pedestal part can be provided actually, it is difficult to provide the apparatus of patent document 1 after installation of furniture etc. Moreover, there exists a problem that a chemical | drug | medicine diffusion stand ring part must be produced according to the shape and size of furniture, and versatility is low.

  Furthermore, the device of Patent Document 1 requires an injection nozzle corresponding to the size of the drug diffusion pedestal, a connecting tube for connecting the aerosol container and the injection nozzle, in addition to the drug diffusion pedestal. Therefore, it becomes a large-scale device.

  Moreover, when injecting a repellent medicine into the closed space like a room | chamber interior, it is preferable from a viewpoint of safety to make the quantity of the repellent medicine injected at a time into below specified amount.

  The present invention has been made in view of such a point, and the object of the present invention is to be used safely anywhere in the room, to be highly versatile, and to eliminate the need for a large-scale device. It is to facilitate the removal process.

  In order to achieve the above object, in the present invention, the ratio of the propellant contained in the aerosol container is increased and the vapor pressure of the solvent that dissolves the insecticidal active ingredient is lowered to form particles ejected from the aerosol container. By slowing down the evaporation rate of the solvent, the particles flew over a wide area.

The first invention is
An insecticidal active ingredient to control moth pests;
A solvent in which the insecticidal active ingredient is dissolved;
A propellant for injecting the insecticidal active ingredient and the solvent;
In an aerosol product for controlling insect pests, comprising an aerosol container containing the insecticidal active ingredient, the solvent and the propellant,
The vapor pressure of the solvent at 25 ° C. is 7.0 kPa or less,
The weight ratio of the propellant contained in the aerosol container and the liquid other than the propellant is set to be in the range of 8:92 to 30:70 when liquid: propellant,
The aerosol container is characterized in that it is a quantitative injection type in which a predetermined amount of the insecticidal active ingredient and the solvent is injected by a single operation of an injection button.

  According to this structure, since the weight ratio of a liquid and a propellant exists in the range of 8: 92-30: 70, it becomes a prescription with a rich propellant. As a result, when a liquid containing an insecticidal active ingredient and a solvent is ejected from an aerosol container, it tends to be small particles, and the momentum of the particles becomes strong, and the ejected particles fly over a wide range, It becomes easy to drift. Furthermore, since the vapor pressure at 25 ° C. of the solvent is 7.0 kPa or less and is sufficiently low, the evaporation rate of the solvent forming the ejected particles becomes slow, and this causes the particles to fly far away. At the same time, the time drifting in the air becomes longer. Therefore, for example, assuming a case where it is sprayed between a wall and furniture, particles containing an insecticidal active ingredient fly to the back along the side of the furniture, then wrap around the back of the furniture and follow the back It flies and drifts in the air, and then falls near the bottom of the furniture due to its own weight. Thus, since the particles fly over a wide range even in a narrow gap, the effectiveness of the insecticidal active ingredient is exhibited over a wide range without providing a large-scale device.

  In addition, since the aerosol container is a fixed-injection type, the amount of the insecticidal active ingredient is not sprayed over the specified amount even when particles are scattered over a wide range as described above, and the safety is increased and handling is improved. It becomes easy. Furthermore, since a use location is not limited under furniture etc. like the past, versatility increases.

According to a second invention, in the first invention,
The insecticidal active ingredient is at least one of ciphenothrin, cyfluthrin and tralomethrin.

  According to this structure, even if there is little quantity of an insecticidal active ingredient, the high effect with respect to a moth pest is acquired.

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

  According to this configuration, since 3 mg or more of the insecticidal active ingredient is ejected by one injection operation, the insecticidal active ingredient contained per particle is sufficiently ensured even when the particles fly over a wide range. High efficacy is obtained. On the other hand, since the insecticidal active ingredient injected by one injection operation is 20 mg or less, high safety is ensured when used in a closed room, for example.

According to a fourth invention, in any one of the first to third inventions,
The solvent is at least one of isopropyl myristate and a saturated hydrocarbon solvent.

  In other words, ethanol (vapor pressure at 25 ° C .: 7.91 kPa) is generally used as a solvent. By using isopropyl myristate and a saturated hydrocarbon solvent, the vapor pressure of the solvent is lower than that of ethanol. Become. Thereby, the evaporation rate of the solvent forming the ejected particles is further reduced, and the time that the particles are floating in the air is further increased.

According to a fifth invention, in any one of the first to fourth inventions,
The ejection amount of liquid other than the propellant by one operation of the ejection button is set to 0.1 ml or more and 0.4 ml or less.

6th invention sprays the insecticidal active ingredient which exterminates a pest insect, the said insecticidal active ingredient melt | dissolves, the vapor pressure in 25 degreeC is 7.0 kPa or less, the said insecticidal active ingredient, and the said solvent And a propellant for injection in a fixed-quantity injection type aerosol container that injects a predetermined amount of the insecticidal active ingredient and the solvent by a single operation of the injection button, and the propellant and a liquid other than the propellant When the weight ratio of liquid: propellant is set to be within the range of 8:92 to 30:70,
A pest control method that sprays the predetermined amount of the insecticidal active ingredient and the solvent from the aerosol container into a gap in the room.

  According to the first and sixth inventions, the ratio of the aerosol propellant is increased and the vapor pressure of the solvent dissolving the insecticidal active ingredient is lowered to slow the evaporation rate of the solvent forming the injected particles. Therefore, the particles can be blown over a wide range, and the efficacy of the insecticidal active ingredient can be exerted over a wide range without providing a large-scale device. In addition, since the aerosol container is a fixed injection type, the amount of the insecticidal active ingredient is not injected more than the specified amount. Therefore, it can be used safely anywhere in the room, is highly versatile, and does not require a large-scale device, facilitating the removal process.

  According to the second invention, since the insecticidal active ingredient is at least one of cifenotrin, cyfluthrin, and tralomethrin, it is possible to obtain high efficacy against pests even if the amount of the insecticidal active ingredient is small. The amount of injection by the operation can be reduced.

  According to the third invention, since the injection amount of the insecticidal active ingredient by one operation of the injection button is 3 mg or more and 20 mg or less, high safety can be secured while obtaining high efficacy by the insecticidal active ingredient.

  According to the fourth invention, since the solvent is at least one of isopropyl myristate and saturated hydrocarbon solvent, it is possible to further increase the time during which particles ejected from the aerosol container are floating in the air, The efficacy by the active ingredient is further increased.

  According to the fifth aspect of the present invention, it can be used safely anywhere in the room, has high versatility, and can eliminate the need for a large-scale device and facilitate the removal process.

It is a perspective view of the aerosol product for pest control. It is the schematic explaining the test environment in a test room.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 is a perspective view of an aerosol product 1 for controlling pests according to an embodiment of the present invention. The pest control aerosol product 1 includes an aerosol container 10, a push-down operation button (injection button) 20, a cylindrical base 30 attached to the aerosol container 10, and a cylindrical cover 40 attached to the cylindrical base 30. It has. Then, by rotating the operation button 20 and the cylindrical cover 40, the operation button 20 can be switched between a pressable state where the operation button 20 can be pressed down and a non-pressable state where the operation button 20 cannot be pressed down. It is configured.

  In the description of this embodiment, the left side and the right side as viewed from the user when the user uses the hand by hand are simply referred to as “left” and “right”, respectively, and are the front side as viewed from the user. The side is simply referred to as “rear”, and the back side as viewed from the user is simply referred to as “front”.

  The peripheral wall portion of the aerosol container 10 has translucency so that the remaining amount of contents can be grasped from the outside. A fixed injection valve mechanism (not shown) is provided at the upper part of the aerosol container 10. This valve mechanism moves in the vertical direction and is composed of a discharge pipe (not shown) for discharging the contents contained in the aerosol container 10 and a biasing member that biases the discharge pipe upward. (Not shown) and a valve body (not shown). The discharge pipe is configured to extend in the vertical direction, and when it is at the rising end position, the valve body closes the lower end (upstream end) of the discharge pipe so that the inside of the aerosol container 10 and the discharge pipe do not communicate with each other. On the other hand, when the discharge pipe is pushed downward from the rising end position, the lower end of the discharge pipe is opened, the inside of the aerosol container 10 communicates with the discharge pipe, and the contents are discharged from the upper end of the discharge pipe. As described above, the valve mechanism is configured. When the discharge pipe is pushed once, the lower end portion of the discharge pipe is momentarily opened and then closed, and the contents are injected by a small amount (predetermined amount). That is, this aerosol container 10 is a fixed quantity injection type. For example, a container described in Japanese Patent Application Laid-Open No. 2014-28631 can be used as the aerosol container 10 of the fixed quantity injection type.

  The operation button 20 can be obtained, for example, by injection molding a resin material, and is entirely formed integrally. The operation button 20 is fitted on the upper side of the discharge pipe of the aerosol container 10 to push the discharge pipe, and has a button body 21 and a nozzle portion 23. The nozzle part 23 protrudes from the front part of the button body 21.

  The nozzle part 23 protrudes to the front side, which is a direction intersecting the center line of the discharge pipe, and is inclined so as to be positioned upward as it goes to the front side. The proximal 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 a range where the angle formed by the plane perpendicular to the center line of the discharge pipe is 5 degrees or more and 45 degrees or less. By tilting the nozzle portion 23, the contents can be effectively discharged obliquely upward.

  The cylindrical base 30 extends in the vertical direction, and is formed in a cylindrical shape having an outer diameter that is substantially the same as the outer diameter of the intermediate portion in the vertical direction of the aerosol container 10. The entire lower end of the cylindrical base 30 is opened, and the upper portion of the aerosol container 10 is inserted and fixed from the lower end of the cylindrical base 30.

  The cylindrical cover 40 is formed so as to surround the operation button 20 and is attached to the cylindrical base 30. That is, the lower side of the cylindrical cover 40 is fitted to 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 with the cylindrical cover 40. Further, the nozzle portion 23 of the operation button 20 protrudes forward from a notch portion 41 provided at the front portion of the cylindrical cover 40.

  The contents contained in the aerosol container 10 are an insecticidal active ingredient that exterminates insect pests, a solvent in which the insecticidal active ingredient is dissolved, and an insecticidal active ingredient and a propellant for injecting the solvent. The contents may contain a pesticide active ingredient, a solvent and a drug other than the propellant. For example, a pest repellent, a fragrance, a disinfectant, a disinfectant, and the like can be mixed with the contents. The type of repellent for moth pests is not particularly limited as long as it has an effect to repel moth pests.

  The insecticidal active ingredient is an ingredient that exerts an insecticidal effect against moth pests, and various drugs used as insecticides can be used. In this embodiment, a synthetic pyrethroid can be used. Specifically, at least one of ciphenothrin, 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 when the spray amount of the insecticidal active ingredient is small as compared with the case of using imiprothrin, phthalthrin, or resmethrin.

  The solvent is preferably one that dissolves the insecticidal active ingredient 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 the vapor pressure at 25 ° C. is 4.5 kPa or less, and still more preferably 1.9 kPa or less. Moreover, the solvent whose vapor pressure in 25 degreeC is 0.7 kPa or less is the most preferable. As such a solvent, for example, at least one of isopropyl myristate and a saturated hydrocarbon solvent can be used, and a mixture thereof may be used.

Examples of the solvent include propanol (vapor pressure 4.41 kPa at 25 ° C.), water (3.2630 kPa), octane (1.8874 kPa), nonane (6.177 × 10 ² Pa), dodecane (same as above). 1.80 × 10 Pa), tridecane (7.5 Pa), isopropyl myristate (1.247 × 10 ⁻² Pa), and the like, but are not limited to these and are included in the above vapor pressure range. Various solvents can be used. A solvent may be used individually by 1 type and may be used in mixture of multiple types.

  When the vapor pressure of the solvent at 25 ° C. exceeds 7.0 kPa, the evaporation rate of the solvent forming the ejected particles increases and the mass of each particle decreases early, causing the particles to fly. As the distance becomes shorter, the time spent in the air will become shorter. This means a decrease in efficacy. On the other hand, when the vapor pressure at 25 ° C. of the solvent is 7.0 kPa or less, the vapor pressure is sufficiently low, so that the evaporation rate of the solvent forming the injected particles becomes slow, and this causes the particles to As it flies far away, the time spent in the air increases. In particular, it is preferable that the vapor pressure at 25 ° C. is 1.9 kPa or less, because the flight distance of the particles is remarkably increased and the time of floating in the air is remarkably increased.

  As the propellant, liquefied petroleum gas (LPG), dimethyl ether (DME) or the like can be used, and these may be mixed and used.

  As described above, the aerosol container 10 contains a propellant and a liquid other than the propellant. The weight ratio between the propellant and the liquid other than the propellant is set to be in the range of 8:92 to 30:70 when the liquid: the propellant is used. Product 1 has a prescription rich in propellants. Thereby, when the liquid containing the insecticidal active ingredient and the solvent is ejected from the aerosol container 10, it tends to be small particles, and the momentum of the particles becomes strong, and the ejected particles fly over a wide range, It becomes easy to drift in the air.

  That is, when the propellant is less than the liquid: propellant weight ratio of 30:70, when the liquid containing the insecticidal active ingredient and the solvent is ejected from the aerosol container 10, the particles become larger. As a result, the weight per particle becomes heavy, and it becomes difficult to float in the air and falls before flying over a wide area. Further, the fact that the propellant is smaller than the ratio of the liquid: propellant weight ratio of 30:70 means that the amount of the liquid is increased, but the amount of the liquid is the weight. If the ratio exceeds the ratio, the amount of the liquid ejected at one time is too large, which also increases the weight per particle and makes it difficult to float in the air. On the other hand, if the propellant is larger than the ratio of the liquid: propellant weight ratio of 8:92, the amount of the liquid injected at one time is too small and the particles do not fly densely over a wide area, which is effective for insecticide. The effect by a component will reduce. Therefore, it is preferable to set the liquid: propellant weight ratio within a range of 8:92 to 30:70 on the premise of a prescription rich in the propellant. More preferably, the weight ratio of the liquid: propellant is in the range of 10:90 to 20:80, and even more preferably in the range of 15:85 to 17:83.

  The spray amount (hereinafter also referred to as Ai amount) of the insecticidal active ingredient by one operation of the operation button 20 is set to 3 mg or more and 20 mg or less. The amount of Ai can be set to the above range by changing the content of the insecticidal active ingredient and the amount of the liquid sprayed by one operation of the operation button 20. When the amount of Ai is less than 3 mg, the effect of the insecticidal active ingredient is reduced because the insecticidal active ingredient sprayed into the space is too small. On the other hand, if the amount of Ai is more than 20 mg, the amount of insecticidal active ingredient injected into the space increases, and a case where it is not preferable in terms of safety, particularly in a narrow space, is assumed.

  Moreover, the injection amount of the liquid (insecticidal active ingredient and solvent) 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 ejected by one operation of the operation button 20 can be within the above range by changing the structure of the valve mechanism. If the amount of the liquid ejected by one operation of the operation button 20 is less than 0.1 ml, the insecticidal active ingredient ejected into the space is too small and the effect of the insecticidal active ingredient is reduced. On the other hand, when the amount of the liquid ejected by one operation of the operation button 20 is larger than 0.4 ml, the insecticidal active ingredient to be ejected into the space is increased, which is not preferable in terms of safety particularly in a narrow space. A case is assumed.

  Next, the case where the aerosol product 1 for controlling insect pests configured as described above is used will be described. The aerosol product 1 for controlling insect pests may be entirely injected into the room, but it is preferably injected into a gap in the room where the insect pest is likely to lurk. That is, for example, the operation button 20 is operated after the nozzle portion 23 of the pest control aerosol product 1 is directed to a narrow gap between the indoor wall and the furniture or a narrow gap between the wall and the appliance. . The operation button 20 is preferably operated only once, but may be operated multiple times when the room is large.

  Thereby, an insecticidal active ingredient and a solvent are injected with a propellant from the nozzle part 23 with the pressure of the propellant accommodated in the aerosol container 10. FIG. At this time, since the weight ratio is set as described above and the propellant is rich in prescription, when the liquid containing the insecticidal active ingredient and the solvent is ejected from the aerosol container 10, small particles are formed. The momentum of the particles increases, and the injected particles fly over a wide area and easily float in the air. Furthermore, since the vapor pressure of the solvent is low, the evaporation rate of the solvent forming the ejected particles is slow, which causes the particles to fly far and the time that they are floating in the air is increased. . Therefore, after particles containing insecticidal active ingredients fly to the back along the sides of furniture and electrical appliances, they wrap around the back side of them and fly along the back and drift in the air, and then by their own weight It falls to near the bottom. Thus, since the particles fly over a wide range even in a narrow gap, the effectiveness of the insecticidal active ingredient is exhibited over a wide range without providing a large-scale device.

  The height of the nozzle part 23 at the time of jetting is preferably about 100 cm from the floor surface. This is because if the nozzle portion 23 is too low, the amount of diffusion of particles upward will be reduced, and it will be difficult for the particles to enter the back side.

  In addition, since the aerosol container 10 is a quantitative injection type, even if particles are scattered over a wide range as described above, the amount of the insecticidal active ingredient is not injected more than the specified amount, and the safety is improved and the handling is improved. Becomes easier. Furthermore, since a use location is not limited under furniture etc. like the past, versatility increases.

Next, the efficacy test result of the aerosol product 1 for controlling insect pests will be described. The efficacy test was performed in a peat chamber 100 as shown in FIG. The peat chamber 100 has a cubic shape with a side of 180 cm and a volume of 5.82 m ³ . In the peat chamber 100, three pieces of furniture 102, 102, 102 are reproduced by a plurality of cardboard boxes 101. The size of each furniture 102 is 52 cm in depth, 160 cm in height, and 52 cm in width. Further, the gap between adjacent furniture 102 and 102 is set to 5 cm. The gap between the side surface of the furniture 102 arranged 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 surface of the furniture 102 and the wall of the peat chamber 100 is also set to 5 cm. Note that although furniture is assumed in FIG. 2, the present invention is not limited to this, and an electrical appliance (for example, a refrigerator or a washing machine) may be used.

  The nozzle part 23 of the pest control aerosol product 1 is directed to the gap between the side surface of the furniture 102 arranged on the left side of FIG. The height of the nozzle part 23 from the floor is set to 100 cm.

  A first mesh bag 104 is disposed at a distance of 50 cm from the tip of the nozzle portion 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 disposed 100 cm away from the tip of the nozzle part 23 toward the back of the gap (behind the furniture 102), and 150 cm away from the tip of the nozzle part 23 toward the back of the gap. The third mesh bag 106 is disposed at a place where the fourth mesh bag 107 is disposed 200 cm away from the tip of the nozzle portion 23 toward the back of the gap, and 250 cm away from the tip of the nozzle portion 23 toward the back of the gap. The fifth mesh bag 108 is placed at the place. The heights of the first to fifth mesh bags 104 to 108 are lowered as the distance from the tip of the nozzle portion 23 increases, and the fifth mesh bag 108 is disposed near the floor surface of the peat chamber 100.

  Each of the first to fifth mesh bags 104 to 108 contains 10 adult females of black cockroaches as test insects. The first to fifth mesh bags 104 to 108 can easily circulate air.

  Thereafter, the operation button 23 is operated. The injection amount of the liquid other than the propellant by one operation of the operation button 20 is set to 0.2 ml.

  After spraying, leave for 5 minutes, and after 5 minutes, collect the first to fifth mesh bags 104 to 108 and take out the test insect. The removed test insects were transferred to a clean container and given sugar water. The lethality after 48 hours from the transfer to the container was calculated.

  In Examples 1 to 10 and Comparative Examples 1 to 10 of the present invention, as shown in Table 1, Ai amount, solvent type, propellant type, and liquid gas ratio are set. The solvent “IPM” is isopropyl myristate, and “Neothio” is neothiozole (manufactured by Chuo Kasei Co., Ltd.) as a saturated hydrocarbon solvent. “Liquid gas ratio” is the weight ratio of the liquid: propellant. The lethality (%) after 48 hours was determined by (test insects that died / total test insects) × 100. “50 cm”, “100 cm”, “150 cm”, “200 cm”, and “250 cm” are distances from the tip of the nozzle portion 23 and indicate the locations where the first to fifth mesh bags 104 to 108 are disposed. Yes. That is, the lethality at “50 cm” is the lethality of the test insects contained in the first mesh bag 104, and the lethality at “100 cm” is the lethality of the test insects contained in the second mesh bag 105. The lethality at “150 cm” is the lethality of the test insects contained in the third mesh bag 106, and the lethality at “200 cm” is the test insects contained in the fourth mesh bag 107. The lethality at “250 cm” is the lethality of the test insects contained in the fifth mesh bag 108. In addition, "-" is a place where the fatality rate has not been obtained.

  In Examples 1 to 10, the weight ratio of the liquid: propellant is in the range of 8:92 to 30:70, and the vapor pressure of the solvent at 25 ° C. is 7.0 kPa or less, which is lower than ethanol. Even when it is 250 cm away from the tip of the part 23, a lethality of 80% or more is obtained.

  On the other hand, Comparative Example 1 is different from Example 1 only in the liquid: propellant weight ratio, and the liquid: propellant weight ratio of Comparative Example 1 is set to 6:94. In Comparative Example 1, the lethality at a distance of 250 cm from the tip of the nozzle portion 23 is only 30%. This is because the amount of the liquid sprayed at one time is too small due to too much propellant, so that the particles do not fly densely over a wide range, and the effect of the insecticidal active ingredient is remarkably reduced.

  In Comparative Examples 2 and 3, the solvent is ethanol, but in Comparative Example 2, the lethality at a distance of 250 cm from the tip of the nozzle portion 23 is only 60%, and in Comparative Example 3, it is 250 cm away from the tip of the nozzle portion 23. The actual fatality rate is only 50%. This is because, since the vapor pressure of ethanol is high, the ejected particles are evaporated before they travel far away, and the flying distance of the particles is shortened.

  In Comparative Example 4, the solvent is ethanol and the liquid: propellant weight ratio is set to 50:50. In Comparative Example 4, the lethality at a distance of 250 cm from the tip of the nozzle portion 23 is only 20%. This is because the above-mentioned relationship between the vapor pressure of ethanol and the propellant is not rich, so when the liquid is ejected from the aerosol container 10, it is difficult to form small particles and the ejected particles are difficult to fly over a wide range. is there.

  In Comparative Example 5, the liquid: propellant weight ratio is set to 50:50. In Comparative Example 5, the lethality at a distance of 250 cm from the tip of the nozzle portion 23 is only 20%. This is because, since the propellant is not rich, when the liquid is ejected from the aerosol container 10, it is difficult to become small particles, and the ejected particles are difficult to fly over a wide range. Similarly, the fatality rate in Comparative Example 6 also deteriorates.

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

  In Comparative Example 10, the weight ratio of the liquid: the propellant is set to 40:60. However, since the amount of the propellant is small, the particles are difficult to fly and the lethality rate is deteriorated.

  As described above, the vapor of the solvent is lowered and the weight ratio of liquid: propellant is set to be in the range of 8:92 to 30:70. Exterminating effect can be obtained. Although the above efficacy test is performed only on black cockroaches, as is clear from Examples 1-10, since the insecticidal active ingredient is attached not only to the front of the gap but also to the black cockroach in the back, other than black cockroaches It is possible to obtain a sufficient extermination effect against other insect pests such as cockroaches, German cockroaches and centipedes.

  The above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As explained above, according to the aerosol product for pest control and the pest control method according to the present invention, it can be used, for example, to control a pest such as an indoor cockroach.

1 Aerosol product for pest control 10 Aerosol container 20 Operation button (Jet button)

Claims (6)

An insecticidal active ingredient to control moth pests;
A solvent in which the insecticidal active ingredient is dissolved;
A propellant for injecting the insecticidal active ingredient and the solvent;
In an aerosol product for controlling insect pests, comprising an aerosol container containing the insecticidal active ingredient, the solvent and the propellant,
The vapor pressure of the solvent at 25 ° C. is 7.0 kPa or less,
The weight ratio between the propellant contained in the aerosol container and the liquid other than the propellant is set to be in the range of 8:92 to 30:70 when the liquid: propellant is used. ,
An aerosol product for controlling insect pests, wherein the aerosol container is a fixed injection type that injects a predetermined amount of the insecticidal active ingredient and the solvent by a single operation of an injection button. In the aerosol product for controlling pests according to claim 1,
An aerosol product for controlling insect pests, wherein the insecticidal active ingredient is at least one of ciphenothrin, cyfluthrin and tralomethrin. In the aerosol product for controlling insect pests according to claim 1 or 2,
An aerosol product for controlling insect pests, wherein the spray amount of the insecticidal active ingredient by one operation of the spray button is set to 3 mg to 20 mg. In the aerosol product for controlling insect pests according to any one of claims 1 to 3,
An aerosol product for controlling pests, wherein the solvent is at least one of isopropyl myristate and a saturated hydrocarbon solvent. In the aerosol product for controlling insect pests according to any one of claims 1 to 4,
An aerosol product for controlling insect pests, wherein the spray amount of the liquid other than the propellant by one operation of the spray button is set to 0.1 ml or more and 0.4 ml or less. An insecticidal active ingredient to control moth pests;
A solvent having a vapor pressure at 25 ° C. of 7.0 kPa or less, as well as dissolving the insecticidal active ingredient
The pesticide active ingredient and the propellant for injecting the solvent are contained in a quantitative injection type aerosol container that injects the insecticide active ingredient and the solvent by a predetermined amount by a single operation of the injection button When the weight ratio of the agent and the liquid other than the propellant is the above liquid: propellant, it is set to be in the range of 8:92 to 30:70,
A method for controlling insect pests, wherein the predetermined amount of the insecticidal active ingredient and the solvent is sprayed from the aerosol container into a gap in the room.

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