Chemical volatilization device

Abstract

Provided is a chemical volatilization device that has an excellent insect pest control effect.　This chemical volatilization device 1 comprises: a container 3 for accommodating a chemical volatilization body 2 that retains a volatile chemical; and an opening / closing mechanism 10 for switching the container 3 between a sealed state and an open state, said volatile chemical being made to volatilize from the container 3 to control insect pests by said opening / closing mechanism 10 switching the container 3 from the sealed state to the open state. When S is the level of sealing of the container 3 as calculated from the weight reduction of a volatile solvent, and T is the time period during which the sealed state is maintained until the container 3 in the sealed state is switched to the open state, the relationship of the following expression (1) is satisfied. (1): 1≤(S–0.3)×T.

Description

Chemical volatilization device

[0001] The present invention relates to a drug volatilization device comprising a container for housing a drug volatilizer that holds a volatile drug, and an opening / closing mechanism for switching the container between a sealed state and an open state.

[0002] Conventionally, a drug volatilization device has been proposed that comprises a drug volatilizer holding a drug that volatilizes at room temperature, and a container having an inner container for containing the drug volatilizer and an outer container for containing the inner container, and is configured to be switchable between an open state in which the drug can be volatilized and a closed state in which the volatilization of the drug can be suppressed by the relative movement of the inner and outer containers (see Patent Document 1).

[0003] Japanese Patent Publication No. 2022-72893

[0004] In the above-mentioned switchable pesticide dispersal device, there is a risk that sufficient pest control effect may not be obtained.

[0005] This invention has been made in view of the above circumstances, and aims to provide a pesticide volatilization device with excellent pest control effects.

[0006] The inventors of this invention conducted diligent research to solve the above problems and discovered that by setting the relationship between the degree of airtightness S and the time T, which is maintained in an airtight state until the container is switched from an airtight state to an open state, to a specific equation, the amount of volatile chemical bleed onto the surface of the chemical volatilizer (amount of bleed material) can be increased. Furthermore, by increasing the amount of bleed material in this way, the amount of volatile chemical volatilized from the bleed material can be increased, thus enabling effective use of the volatile chemical for pest control and enhancing the pest control effect. This led to the completion of the present invention.

[0007] In other words, the characteristic configuration of the pesticide volatilization device according to the present invention for solving the above problem is a pesticide volatilization device comprising a container for containing a pesticide volatilizer that holds a volatile pesticide, and an opening / closing mechanism for switching the container between a sealed state and an open state, wherein the opening / closing mechanism switches the container from a sealed state to an open state, thereby volatilizing the volatile pesticide from the container to control pests, wherein when the degree of airtightness of the container, which can be determined from the weight reduction of the volatile solvent, is S, and the time during which the sealed state is maintained until the container is switched from a sealed state to an open state is T, the device is configured to satisfy the following relationship: (1): 1 ≤ (S - 0.3) × T ... (1).

[0008] With this configuration of pesticide volatilization device, by setting the degree of airtightness S and time T to satisfy the above equation (1), the amount of volatile pesticide bleed onto the surface of the pesticide volatilizer can be increased during the period from switching from a sealed state to an open state (i.e., from the start of the sealed state until just before it ends). Then, by switching to an open state, a relatively large amount of volatile pesticide can be released (volatilized) from the bleed material, so the volatile pesticide can be effectively utilized for pest control, resulting in superior pest control effectiveness.

[0009] In the drug volatilization apparatus according to the present invention, in formula (1), the degree of airtightness S is preferably determined from the following formula (2): S = 1 - Y / X ... (2), where X is the weight loss of 1-hexanol measured after fixing a paper cloth inside the open container, dropping 100 μL of 1-hexanol as the volatile solvent onto the paper cloth, and letting it stand for 30 minutes at 20 to 25°C and 26 to 38% RH while maintaining the open state, and Y is the weight loss of 1-hexanol measured under the same conditions except that the paper cloth is fixed inside the open container, dropping 100 μL of 1-hexanol onto the paper cloth, and immediately sealing the container.

[0010] Here, the degree to which 1-hexanol, as a volatile solvent, evaporates from a paper cloth fixed inside the container (i.e., the degree of weight loss of 1-hexanol) decreases as the degree of container sealing increases and decreases as the degree of container sealing decreases, and can therefore serve as an indicator of the container's sealing state. Furthermore, by measuring the weight loss of 1-hexanol in the container in both open and sealed states, and using the weight loss X in the open state as a reference, the ratio (Y / X) of the weight loss Y in the sealed state to the weight loss X is calculated, and this ratio (Y / X) represents the degree of volatilization of 1-hexanol (i.e., the degree of openness) caused solely by the change in state between open and sealed states, excluding other factors in the container. The value obtained by subtracting the ratio (Y / X) from 1 (1 - (Y / X)) represents the degree to which 1-hexanol remains in the container without volatilizing, i.e., the degree of airtightness. Furthermore, the closer the degree of airtightness S is to 1, the greater the degree of airtightness, and the closer it is to 0, the less airtight the degree of airtightness. By evaluating the degree of airtightness S using the value calculated in this way (i.e., the value calculated by formula (2) above), the degree of airtightness resulting solely from the change in state between an open state and a sealed state is more appropriately represented.

[0011] Therefore, with the chemical volatilization device of this configuration, the degree of airtightness S is determined from the above formula (2), which more accurately represents the degree of airtightness inside the container. As a result, the above formula (1) more accurately represents the relationship between the degree of airtightness S and time T, and consequently, the pest control effect can be more effectively enhanced.

[0012] In the drug volatilization device according to the present invention, it is preferable that the time T in formula (1) is set to 1 to 24 hours.

[0013] With this configuration of pesticide volatilization device, the pest control effect can be further enhanced by setting the time T to 1 to 24 hours.

[0014] In the drug volatilization device according to the present invention, it is preferable that the volatilizable drug is at least one selected from the group consisting of metofluthrin, profluthrin, empenthrin, and transfluthrin.

[0015] With this configuration of pesticide volatilization device, by selecting the above compound as the volatile pesticide, the volatilization performance and the control effect against flying insects can be enhanced.

[0016] Furthermore, the inventors have found that the volume is 18 to 33 m³. ３ A sealed container is placed in an indoor space, and after releasing pests into the indoor space, the sealed state is switched to an open state, and the KT of the pests to be determined from the point of switching to the open state is measured. ５０ We discovered that the pest control effect can be enhanced by setting value A to a specific appropriate range, and thus completed another invention.

[0017] In other words, another characteristic configuration of the pesticide volatilization device according to the present invention comprises a container for housing a pesticide volatilizer that holds a volatile pesticide, and an opening / closing mechanism for switching the container between a sealed state and an open state, wherein the opening / closing mechanism switches the container from a sealed state to an open state, thereby volatilizing the volatile pesticide from the container to control pests, and has a volume of 18 to 33 m³. ３ After releasing the pests into the indoor space, the container, which had been sealed for a predetermined time, was switched from a sealed state to an open state, and immediately after the switch, the container was placed in the indoor space, and the KT of the pests was determined from the time the container was switched to the open state. ５０ Value A, and the KT of the pests, which is determined from the time the container, which has been kept open beforehand, is placed in the indoor space after releasing the pests into the indoor space. ５０ The objective is to construct the ratio (A / B) to value B such that it satisfies the following relationship: (3) 0.1 ≤ A / B ≤ 0.8 ... (3).

[0018] According to this configuration of the pesticide volatilization device, the KT of the pests to be detected is obtained by switching the container from a sealed state to an open state in the above indoor space. ５０ Value A and the KT of pests determined while the container is kept open.５０ By setting the ratio (A / B) to the relationship of the above formula (3), the pest control effect can be enhanced.

[0019] In another drug volatilization device according to the present invention, the KT ５０ The value A is preferably 5 to 120 minutes.

[0020] According to the drug volatilization device of this configuration, the KT of pests obtained from the time point when switching from the sealed state to the open state in the indoor space ５０ By setting the value A to 5 to 120 minutes, the pest control effect can be rapidly enhanced.

[0021] In another drug volatilization device according to the present invention, it is preferable that the predetermined time for maintaining the sealed state is set to 1 to 24 hours.

[0022] According to the drug volatilization device of this configuration, by setting the predetermined time to 1 to 24 hours, the pest control effect can be further enhanced.

[0023] In another drug volatilization device according to the present invention, it is preferable that the volatile drug is at least one selected from the group consisting of metofluthrin, profluthrin, empenthrin, and transfluthrin.

[0024] According to the drug volatilization device of this configuration, by selecting the above compound as the volatile drug, the volatilization performance and the control effect on flying pests can be enhanced.

[0025] FIG. 1 is a schematic perspective view showing a drug volatilization device according to a first embodiment of the present invention. FIG. 2 is a schematic perspective view showing an outer container and an inner container in the drug volatilization device of FIG. 1.

[0026] Hereinafter, the present invention will be described with reference to the drawings. However, the present invention is not intended to be limited to the configurations described in the embodiments and drawings below. Also, the size relationships (the size relationships between parts) of the parts shown in each figure do not necessarily accurately reflect the actual size relationships.

[0027] [First Embodiment] Figure 1 is a schematic perspective view showing a drug volatilization device according to the first embodiment of the present invention, where (a) shows the case when the container is open and (b) shows the case when the container is sealed. Figure 2 is a schematic perspective view showing the outer container and inner container in the drug volatilization device of Figure 1, where (a) shows the outer container and (b) shows the inner container.

[0028] [Pharmaceutical Volatilization Device] The pharmaceutical volatilization device 1 of this embodiment includes a container 3 that houses a pharmaceutical volatilizer 2 that holds a volatile pharmaceutical agent, and an opening / closing mechanism 10 that switches the container 3 between a sealed state (Figure 1(b)) and an open state (Figure 1(a)).

[0029] <Volatile Pesticides> Examples of volatile pesticides include insecticides, repellents, fungicides, antibacterial agents, fragrances, deodorizers, and synergists. These volatile pesticides can be used alone or in combination. For example, when used to control or repel flying insects such as mosquitoes, midges, and drain flies, pyrethroid compounds are preferred as volatile pesticides. In particular, pyrethroid compounds that volatilize at room temperature, such as metofluthrin, profluthrin, empenthrin, and transfluthrin, which have high volatility and control effects against flying insects, are preferred, with metofluthrin and transfluthrin being more preferred. Volatilizable pesticides can also be used in combination with known poorly volatilizable pesticides.

[0030] <Volatile Drug Dispersant> As the volatile drug dispersant 2, for example, a structure can be used in which a volatile drug is held in a carrier by impregnation or kneading. The volatile drug held in the carrier can volatilize from the carrier over time. Examples of materials for the carrier in the volatile drug dispersant 2 include paper, pulp, natural fibers, synthetic fibers, resin bodies, resin sheets, inorganic or organic porous bodies, gel-like bodies, etc. Although a resin sheet impregnated with a drug is simpler for the volatile drug dispersant 2, it is preferable to use a resin body into which the volatile drug has been kneaded in, as this makes it easier to control the sustained release of the volatile drug during the period of use, stabilizes the amount of drug volatilization, and suppresses the washing away of the drug by moisture such as rain. Examples of resins for the resin body and resin sheet used as the carrier include polyethylene, polypropylene, polyvinyl alcohol, polyvinyl acetate, polybutadiene, polyisoprene, ethylene-vinyl acetate copolymer, ethylene-methyl methacrylate copolymer, styrene-butadiene copolymer, etc. The form of the volatile agent 2 can be, for example, a sheet, granules, or a three-dimensional shape. Furthermore, from the viewpoint of improving the volatilization efficiency of the volatile agent, for example, a honeycomb structure, a perforated structure, or a planar or three-dimensional mesh structure can be adopted.

[0031] <Container, Opening / Closing Mechanism> In this embodiment, the container 3 comprises an inner container 4 that houses a volatile agent 2 holding a volatile agent and has an inner opening 4a for releasing the volatile agent to the outside, and an outer container 5 on which the inner container 4 is slidably mounted and which has an outer opening 5a for releasing the volatile agent to the outside. The lower end of the outer container 5 is an open portion 5b that is open to allow the inner container 4 to be inserted and removed. When the inner container 4 is slid relative to the outer container 5 in one direction and the inner opening 4a and the outer opening 5a overlap, the volatile agent 2 is exposed, and the container is in an open state that releases the volatile agent to the outside of the container 3 (Figure 1(a)). When the inner container 4 is slid relative to the outer container 5 in the opposite direction and the inner opening 4a and the outer opening 5a do not overlap, the volatile agent 2 is not exposed, and the container is in a sealed state that restricts the release of the volatile agent to the outside of the container 3 (Figure 1(b)). The inner opening 4a and outer opening 5a are formed in the inner container 4 and outer container 5, respectively, so as to have dimensions and positional relationships that enable the achievement of both an open state and a sealed state. The opening ratio of the drug volatilization device 1, which is the ratio of the total area of ​​the opening formed by the overlapping of the inner opening 4a and the outer opening 5a in the open state to the total surface area of ​​the outer container 5, is preferably 10 to 50%, and more preferably 20 to 40%. Furthermore, when setting the opening ratio of the drug volatilization device 1, the inner opening ratio, which is the ratio of the total area of ​​the inner opening 4a (total opening area) to the total surface area of ​​the inner container 4, is preferably 10 to 50%, and more preferably 20 to 40%. Furthermore, the outer opening ratio, which is the ratio of the total area of ​​the outer opening 5a (total opening area) to the total surface area of ​​the outer container 5, may be set appropriately in combination with the inner opening 4a so that the opening ratio of the drug volatilization device 1 can be set within the above range.

[0032] Then, by inserting the inner container 4 through the opening 5b of the outer container 5 and sliding it relative to the outer container 5, the sealed state and the open state can be switched. In this way, in this embodiment, the inner container 4 and the outer container 5 constitute the opening and closing mechanism 10, and by switching the container 3 from a sealed state to an open state using the opening and closing mechanism 10, volatile chemicals are released from the container 3 to control pests. The number and size of the inner openings 4a and outer openings 5a are not particularly limited and can be set as appropriate. The degree of airtightness S, which will be described later when the container 3 is in a sealed state, can be adjusted as appropriate by the gap between the outer wall of the inner container 4 and the inner wall of the outer container 5.

[0033] The inner container 4 is preferably a molded body made of polyester resin. Since the inner container 4 is in direct contact with the drug volatilizer 2, there is a risk that it may absorb the drug present on the surface of the drug volatilizer 2. However, by making the inner container 4 a molded body made of polyester resin, it is possible to suppress the absorption of the drug present on the surface of the drug volatilizer 2 into the inner container 4, thereby allowing a wide variety of drugs to be volatilized from the inner container 4 to the outside.

[0034] The outer container 5 is preferably a molded body of polyolefin resin. Here, the inner container 4 is replaced together with the drug volatilizer 2 when the drug volatilizer 2 has volatilized and the drug content has decreased, whereas the outer container 5 is reused even after the inner container 4 has been replaced. For this reason, it is preferable that the outer container 5 has impact resistance so that it can withstand repeated use. In this regard, polyolefin resin has higher impact resistance than polyester resin and the like, so it can improve the impact resistance of the outer container 5. Thus, polyolefin resin is suitable as a constituent material for the outer container 5 that is used repeatedly.

[0035] <Relationship between airtightness S and time T during which the airtight state is maintained> In this embodiment, when the airtightness of the container 3, determined from the weight reduction of the volatile solvent, is S, and the time during which the airtight state is maintained until the container 3 is switched from an airtight state to an open state is T, the following relationship is satisfied by equation (1): 1 ≤ (S - 0.3) × T ... (1).

[0036] The technical meaning of equation (1) is as follows: The amount of volatile chemicals contained in container 3 that volatilizes is normally evaluated as the product S・T of the degree of airtightness S and time T. Here, as will be described later, a degree of airtightness S of 1 corresponds to a completely sealed state, and a degree of airtightness of 0 corresponds to a completely open state. Here, since ordinary volatile chemicals have a relatively small volatilization rate, there is a risk that factors other than the sealing operation may come into play when investigating the relationship between the degree of airtightness and the degree of volatilization. Therefore, we decided to use 1-hexanol, which has a much larger volatilization rate than ordinary volatile chemicals, to evaluate the degree of airtightness. However, in order to appropriately evaluate the amount of volatilization of volatile chemicals, it is necessary to correct for the difference in volatilization rates between 1-hexanol and ordinary chemicals by some means. Therefore, we decided to subtract 0.3 from the degree of airtightness S and then multiply by time T. We thought that this would allow us to appropriately evaluate the actual amount of volatile chemicals held in the chemical volatilizer 2 (the amount of volatilization corresponding to the bleed onto the surface of the chemical carrier 2).

[0037] By setting the degree of airtightness S and time T to satisfy the above equation (1), the amount of volatile chemical bleed onto the surface of the chemical volatilizer 2 can be increased during the period from switching from a sealed state to an open state (i.e., from the start of the sealed state until just before it ends). Then, by switching to an open state, a relatively large amount of volatile chemical can be released (volatilized) from the bleeder, so the volatile chemical can be effectively utilized for pest control, resulting in superior pest control effectiveness.

[0038] In equation (1), the degree of airtightness S is calculated from the following equation (2): S = 1 - Y / X ... (2) where X is the weight loss of 1-hexanol measured after fixing a paper cloth inside an open container 3, dropping 100 μL of 1-hexanol as a volatile solvent onto the paper cloth, and letting it stand for 30 minutes at 20-25°C and 26-38% RH while maintaining the open state, and Y is the weight loss of 1-hexanol measured under the same conditions except that a paper cloth is fixed inside an open container 3, dropping 100 μL of 1-hexanol onto the paper cloth, and immediately sealing the container 3.

[0039] Here, the degree to which 1-hexanol, as a volatile solvent, evaporates from a paper cloth (i.e., the degree of weight loss of 1-hexanol) decreases as the degree of sealing of container 3 increases and decreases as the degree of sealing of container 3 decreases, and can therefore serve as an indicator of the sealing state of container 3. Furthermore, by measuring the weight loss of 1-hexanol in container 3 in both an open and a sealed state, and using the weight loss X of 1-hexanol in container 3 in the open state as a reference, the ratio (Y / X) of the weight loss Y of 1-hexanol in container 3 in the sealed state to the weight loss X is calculated, and this ratio (Y / X) represents the degree of volatilization of 1-hexanol (i.e., the degree of openness) caused solely by the change in state between the open and sealed states, excluding other factors in container 3. The value obtained by subtracting the ratio (Y / X) from 1 (1 - (Y / X)) represents the degree to which 1-hexanol remains in container 3 without volatilizing, that is, the degree of airtightness. The closer this degree of airtightness S is to 1, the higher the degree of airtightness, and the closer it is to 0, the lower the degree of airtightness. By evaluating the degree of airtightness S using the value calculated in this way (i.e., the value calculated by formula (2) above), the degree of airtightness resulting solely from the change in state between an open state and a sealed state is more appropriately represented.

[0040] As described above, the paper rags are used to calculate the degree of airtightness S as a characteristic of the container 3, and pulp rags can be used as such paper rags. The pulp rags have a basis weight of 5 to 60 g / m². ２You can use materials that are 10-50 g / m². More specifically, 10-50 g / m². ２ It can be used that is 15-30 g / m ２ It is possible to use such pulp wipes. Commercially available products can be used as such pulp wipes, specifically Kimwipes (registered trademark, basis weight: 22.2 g / m²). ２ (Manufactured by Nippon Paper Crecia Co., Ltd.) Elleair® ProWipe Soft Micro Wiper S200 (Basis weight: 22.2 g / m²) ２ Paper wipes (manufactured by Daio Paper Corporation, etc.) may be used. Paper wipes can be of any shape, but should be approximately 3240 mm in length. ２ Cut the cloth to a size of approximately 60 mm x 54 mm before use. In addition, to prevent ambient wind from affecting the volatilization of the dropped 1-hexanol, the airtightness S should be measured with the container 3 placed on a stand and surrounded by shields (such as partitions) from the horizontal and above, so that wind does not blow on the container 3 from the horizontal or vertical directions. The 1-hexanol should be dropped in small amounts near the center of the paper cloth, changing the location each time, so that it does not drip down. Furthermore, a preliminary test is conducted in which, with container 3 in an open state, 1-hexanol is dropped and it is confirmed whether all of the 1-hexanol volatilizes before 30 minutes have elapsed from the drop. If it does not volatilize completely (the weight loss value (X) of 1-hexanol after 30 minutes is less than 100 μL), the amount of 1-hexanol to be dropped is set to 100 μL. If all of the 1-hexanol volatilizes before 30 minutes have elapsed from the drop (the weight loss value (X) of 1-hexanol becomes 100 μL before 30 minutes have elapsed), the amount to be dropped is set to a range of more than 100 μL and less than or equal to 200 μL so that it does not drip from the paper cloth. When measuring the degree of airtightness S, the measurement is performed with no volatile substance 2 of the drug contained inside container 3 (more specifically, inside the inner container 4).

[0041] Therefore, by determining the degree of airtightness S from the above formula (2), the degree of airtightness S of the container 3 more accurately represents the degree of airtightness inside the container 3. As a result, the above formula (1) more accurately represents the relationship between the degree of airtightness S and time T, and consequently, the pest control effect can be more effectively enhanced.

[0042] In this embodiment, in formula (1) above, it is preferable that time T is set to 1 to 24 hours, more preferably to 3 to 20 hours, even more preferably to 6 to 14 hours, and particularly preferably to 10 to 14 hours. By setting time T to the above appropriate range, the pest control effect can be further enhanced.

[0043] In this embodiment, the opening and closing mechanism 10 is shown to be composed of an inner container 4 and an outer container 5. However, the opening and closing mechanism 10 is not limited to the embodiment shown, and other configurations can be adopted as long as they allow the container 3 to be switched between a sealed state and an open state. For example, in this embodiment, the inner container 4 and the outer container 5 are shown to be slidable by linear motion, but other configurations, such as those in which they are slidable by rotational motion, can also be adopted. Another configuration could be one in which the container is provided with an openable and closable window.

[0044] The pesticide volatilization device 1 of this embodiment can be used in pest control methods.

[0045] [Second Embodiment] A second embodiment of the drug volatilization device according to the present invention will be described. In this embodiment, a drug volatilization device 1 equipped with the components shown in Figures 1 and 2 described above will be used as an example. For this reason, a detailed explanation of the components of the drug volatilization device 1 will be omitted.

[0046] [Pharmaceutical Volatilization Device] As shown in the first embodiment described above, the pharmaceutical volatilization device 1 of this embodiment comprises a container 3 for containing a volatile pharmaceutical agent and an opening / closing mechanism 10 for switching the container 3 between a sealed state (Figure 1(b)) and an open state (Figure 1(a)). The opening / closing mechanism 10 is composed of an inner container 4 and an outer container 5.

[0047] <KT ５０ Value > In this embodiment, the chemical volatilization device 1 has a volume of 18 to 33 m³. ３ After releasing the pests into the indoor space, the container 3, which had been sealed for a predetermined time, was switched from a sealed state to an open state, and immediately after the switch, the container was placed in the indoor space, and the KT of the pests to be determined from the time the container was switched to an open state was measured. ５０Value A and the KT of the pests, which is determined from the moment container 3 is placed in the indoor space after releasing the pests into the indoor space and keeping it open beforehand. ５０ The ratio of value B (A / B) is constructed such that it satisfies the following relationship: (3) 0.1 ≤ A / B ≤ 0.8 ... (3). Here, the volume is 18 to 33 m³. ３ "The indoor space" corresponds to the volume of a 4.5 to 8 tatami mat living room in a typical Japanese house. "Specified time" is the time required to satisfy the above formula (3). "Kept open" specifically means that the open state was maintained for 24 hours or more, more specifically, for 24 to 48 hours. "In advance" indicates that the open state was maintained as described above before releasing the pests into the indoor space.

[0048] As the time that container 3 is sealed decreases, the time that the volatile pesticide is bred into the surface of the volatile pesticide 2 decreases during the period from when the sealed state is switched to an open state (i.e., from when the sealed state is started until just before it is ended). As a result, when the sealed state is switched to an open state, the amount of volatile pesticide released from the breedy body decreases, and the KT of pests decreases. ５０ Value A tends to increase (indicating a decrease in pest control effectiveness). On the other hand, the longer the container 3 is sealed, the greater the amount of volatile pesticide bled onto the surface of the pesticide volatilizer 2 (amount of bled material) during the period from when the sealed state is switched to an open state (i.e., from when the sealed state is started until just before it is ended). As a result, when the state is switched to an open state, a larger amount of volatile pesticide is released, and the KT of the pests increases. ５０ The value A tends to decrease (indicating improved pest control effectiveness). Also, when the degree of airtightness S of container 3 decreases, the amount of bleed decreases during the period from the airtight state to the open state, while when the degree of airtightness S of container 3 increases, the amount of bleed tends to increase during the period from the airtight state to the open state. Furthermore, when the container 3 is switched from the airtight state to the open state as described above, KT ５０ Value A and KT when container 3 is kept open.５０ The ratio of value B (A / B) is determined by the fact that the sealed state itself is the result of KT when all other conditions are kept equal. ５０ It can be said that this is an indicator of the change (increase) in the value. Therefore, when the type of volatile pesticide (ease of breeding), the amount of volatile pesticide in the pesticide volatilizer 2, the surface area of ​​the pesticide volatilizer 2, etc. are set to certain conditions, the above ratio (A / B) will be calculated, and when these are set to different conditions, the above ratio (A / B) will be calculated for each condition. In addition, by adjusting the time the container 3 is sealed and the degree of sealing S, the KT of pests can be controlled. ５０ The value A can be adjusted, thereby allowing the above ratio (A / B) to be set.

[0049] In the above indoor space, the KT of pests obtained by switching container 3 from a sealed state to an open state ５０ Value A and the KT of the pests determined while maintaining the open state. ５０ By setting the ratio (A / B) to value B to satisfy the relationship shown in equation (3) above, the pest control effect can be enhanced.

[0050] In this embodiment, KT ５０ Value A is preferably between 5 and 120 minutes.

[0051] In the above indoor space, the container 3 is switched from a sealed state to an open state, and the KT of the pests to be determined from the time the switch to the open state is made ５０ By setting value A to 5 to 120 minutes, the pest control effect can be rapidly enhanced.

[0052] In this embodiment, the predetermined time for maintaining the sealed state is preferably set to 1 to 24 hours, more preferably to 3 to 20 hours, even more preferably to 6 to 14 hours, and particularly preferably to 10 to 14 hours. By setting the predetermined time within the appropriate range, the pest control effect can be further enhanced.

[0053] The pesticide volatilization device 1 of this embodiment can be used in a pest control method targeting flying insects. Specifically, it comprises a container 3 for containing a volatile pesticide and an opening / closing mechanism 10 for switching the container 3 between a sealed state and an open state. By switching the container from a sealed state to an open state using the opening / closing mechanism 10, the volatile pesticide is volatilized from the container 3 to control the insects, with a volume of 18 to 33 m³. ３ After releasing the pests into the indoor space, the container 3, which had been sealed for a predetermined time, was switched from a sealed state to an open state, and immediately after the switch, the container was placed in the indoor space, and the KT of the pests to be determined from the time the container was switched to an open state was measured. ５０ Value A and the KT of the pests, which is determined from the moment container 3 is placed in the indoor space after releasing the pests into the indoor space and keeping it open beforehand. ５０ It can be used in pest control methods where the ratio of value B (A / B) is set to satisfy the following relationship: (3) 0.1 ≤ A / B ≤ 0.8 ... (3).

[0054] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

[0055] [Examples 1-8, Comparative Examples 1-2] As the volatile agent impregnated with the volatile agent, Examples 1-7 and Comparative Examples 1-2 used a long-term (long-term usable) volatile agent, while Example 8 used a medium-term (medium-term usable) volatile agent having the same shape and dimensions as the long-term volatile agent. Each volatile agent was placed in an inner container with an inner opening as illustrated in Figures 1 and 2 (volume: approximately 220 cm³). ３The inner container was housed in an inner opening ratio of approximately 35%. The inner container was inserted through the opening of an outer container having an outer opening as illustrated in Figures 1 and 2 to create the pesticide volatilization devices (opening ratio: approximately 35%) of Examples 1 to 8 and Comparative Examples 1 to 2. In each pesticide volatilization device, as shown in Tables 1 and 2, transfluthrin was used as the volatilizable agent, and the gap between the outer wall of the inner container and the inner wall of the outer container was appropriately adjusted so that the degree of airtightness S in a state where the inner opening of the inner container and the outer opening of the outer container do not overlap (sealed state) was set to the values ​​shown in Tables 1 and 2. The degree of airtightness S was determined by the measurement method described below. The time T (hours) during which the sealed state is maintained until the container is switched to the open state was set to the values ​​shown in Tables 1 and 2, and the relationship between the degree of airtightness S and time T was calculated as the result of the formula [(S - 0.3) × T]. The pest control effect of the pesticide volatilization devices of Examples 1 to 8 and Comparative Examples 1 to 2 was evaluated using the evaluation method described below.

[0056] <Method for measuring airtightness S> Rectangle (approximately 60 mm x 54 mm, approximately 3240 mm) ２ ) cut paper wipes (product name: Kimwipes® S-200, basis weight: 22.2 g / m²) ２A paper cloth (manufactured by Nippon Paper Crecia Co., Ltd.) was placed inside an open container (inside the inner container that does not contain the volatile substance) and fixed in place. Specifically, one end of the paper cloth was clipped with a paper clip approximately 3 cm long, and the paper clip was secured to the top of the inner container with cellophane tape. 100 μL of 1-hexanol was dropped onto the paper cloth near the center, ensuring that the 1-hexanol did not drip off the cloth. Immediately afterward, the container was sealed, and the total weight of the container was measured. Next, the container was placed on a stand, and to prevent wind from hitting it, the container was surrounded by partition plates from the horizontal and above. In this state, it was left to stand for 30 minutes at 20-25°C and 26-38% RH, after which the total weight of the container was measured, and the weight loss value Y of 1-hexanol was measured. Similarly, after dropping 1-hexanol onto a paper cloth fixed inside an open container, the container was immediately sealed, and the total weight of the container was measured. Next, the container was switched to an open state, and the container was enclosed with a partition plate in the same manner as above. In this state, it was left to stand for 30 minutes at the same temperature and humidity as above, then the container was switched to a sealed state, the total weight of the container was measured, and the weight loss value X of 1-hexanol was measured (control). Using the obtained weight loss values ​​X and Y, the degree of airtightness S was calculated from the following formula (2). The results are shown in Tables 1 and 2. S = 1 - Y / X ... (2)

[0057] <Method for evaluating pest control effectiveness> The container of the pesticide volatilization device was sealed, and the sealed state was maintained for the time T shown in Tables 1 and 2, then 25 m ３ The container was placed indoors (indoor space). After releasing 50 adult female Culex pipiens mosquitoes into the room, the container was switched from a sealed state to an open state, and the number of insects that had turned over over time from the point of switching to the open state was counted. ５０ Value A was determined. Furthermore, the lethality of the test pests was determined 24 hours after the switchover. On the other hand, the container of the pesticide volatilization device was kept open for 24 hours without being sealed, and 50 adult female Culex pipiens mosquitoes were released into the room. Then, the open container was placed in the room, and the number of test pests that had turned over over time from the time the container was placed was counted. ５０ The value B was found. And KT ５０ Value A and KT ５０The ratio (A / B) to value B was calculated. Based on the ratio (A / B), the effect of creating a sealed environment to enhance pest control efficacy was evaluated according to the following criteria. The results are shown in Tables 1 and 2. (Evaluation Criteria) A: Ratio (A / B) less than 0.3 (Excellent) B: Ratio (A / B) 0.3 or more and less than 0.8 (Good) C: Ratio (A / B) 0.8 or more (Poor)

[0058]

[0059]

[0060] As shown in Tables 1 and 2, Examples 1 to 8, in which the value of [(S - 0.3) × T] satisfies the range of 1 or more, showed superior pest control enhancement effects due to the sealed container compared to Comparative Examples 1 to 2, in which the value did not meet the range. As a result, it was shown that the pest control effect was enhanced. Also, KT ５０ Examples 1 to 8, in which value A satisfies 5 to 120 minutes, are KT ５０ Compared to Comparative Examples 1 and 2, in which value A did not meet the required range, the effect of sealing the container to enhance pest efficacy was superior, resulting in an improved pest control effect. While the above shows experimental results using transfluthrin as the volatile pesticide, it has been confirmed that using metofluthrin also demonstrates a similar superior effect of sealing the container to enhance pest efficacy, resulting in an improved pest control effect.

[0061] The chemical volatilization device of the present invention can be used as a volatilization device for insecticides, fragrances, etc., but it is particularly effective for the purpose of controlling or repelling flying insects such as mosquitoes, midges, and drain flies.

[0062] 1. Chemical volatilization device 2. Chemical volatilizer 3. Container 4. Inner container 4a. Inner opening 5. Outer container 5a. Outer opening 5b. Opening section 10. Opening / closing mechanism

Claims

1. A pesticide volatilization device comprising a container for containing a pesticide volatilizer that holds a volatile pesticide, and an opening / closing mechanism for switching the container between a sealed state and an open state, wherein the opening / closing mechanism switches the container from a sealed state to an open state, thereby volatilizing the volatile pesticide from the container to control pests, wherein when S is the degree of airtightness of the container determined from the weight reduction of the volatile solvent, and T is the time during which the sealed state is maintained until the container is switched from a sealed state to an open state, the pesticide volatilization device is configured to satisfy the following equation (1): 1 ≤ (S - 0.3) × T ... (1).

2. In formula (1) above, the degree of airtightness S is determined by the following formula (2): S = 1 - Y / X ... (2), where X is the weight loss of 1-hexanol measured after fixing a paper cloth inside the open container, dropping 100 μL of 1-hexanol as the volatile solvent onto the paper cloth, and maintaining the open state, standing for 30 minutes at 20-25°C and 26-38% RH, and Y is the weight loss of 1-hexanol measured under the same conditions except that the paper cloth is fixed inside the open container, dropping 100 μL of 1-hexanol onto the paper cloth, and immediately sealing the container, and the drug volatilization device according to claim 1.

3. The drug volatilization device according to claim 1 or 2, wherein in formula (1), time T is set to 1 to 24 hours.

4. The drug volatilization device according to claim 1 or 2, wherein the volatile drug is at least one selected from the group consisting of metofluthrin, profluthrin, empenthrin, and transfluthrin.

5. A pesticide volatilization device comprising a container for containing a pesticide volatilizer that holds a volatile pesticide, and an opening / closing mechanism for switching the container between a sealed state and an open state, wherein the opening / closing mechanism switches the container from a sealed state to an open state, thereby volatilizing the volatile pesticide from the container to control pests, with a volume of 18 to 33 m³. ３ After releasing the pests into the indoor space, the container, which had been sealed for a predetermined time, was switched from a sealed state to an open state, and immediately after the switch, the container was placed in the indoor space, and the KT of the pests was determined from the time the container was switched to the open state. ５０ Value A, and the KT of the pests, which is determined from the time the container, which has been kept open beforehand, is placed in the indoor space after releasing the pests into the indoor space. ５０ A chemical volatilization device configured such that the ratio of value B (A / B) satisfies the following relationship: (3) 0.1 ≤ A / B ≤ 0.8 ... (3).

6. The aforementioned KT ５０ The drug volatilization apparatus according to claim 5, wherein value A is 5 to 120 minutes.

7. The drug volatilization device according to claim 5 or 6, wherein the predetermined time for maintaining the sealed state is set to 1 to 24 hours.

8. The drug volatilization device according to claim 5 or 6, wherein the volatile drug is at least one selected from the group consisting of metofluthrin, profluthrin, empenthrin, and transfluthrin.

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