WO2019151072A1

WO2019151072A1 - Insect-catching device and insect-catching method

Info

Publication number: WO2019151072A1
Application number: PCT/JP2019/002034
Authority: WO
Inventors: 一也高山
Original assignee: 日東電工株式会社
Priority date: 2018-02-01
Filing date: 2019-01-23
Publication date: 2019-08-08
Also published as: JP2019129786A

Abstract

An insect-catching device comprises a carbon dioxide concentration unit that concentrates carbon dioxide in the air.

Description

Insect capture device and insect capture method

The present invention relates to an insect capturing apparatus and an insect capturing method.

In order to capture insects, the insect's chemotaxis may be used. For example, a technique is known in which a concentration gradient of carbon dioxide gas is created in the air, and insects are attracted by the concentration gradient to capture the insects. Patent Document 1 discloses an apparatus for capturing flying insects, which is configured to continuously burn a combustible material to generate exhaust gas containing carbon dioxide.

Special table 2007-529230 gazette

However, since the combustible material used in the apparatus disclosed in Patent Document 1 is a consumption material for generating carbon dioxide, replenishment is required to continue using the apparatus. Such replenishment work is complicated.

In view of the above points, an aspect of the present invention is an insect capturing apparatus that attracts insects using carbon dioxide, and provides an apparatus that does not require supplementation of consumption materials for generating carbon dioxide gas. And

One embodiment of the present invention is an insect trapping device including a carbon dioxide concentration unit that concentrates carbon dioxide in the air.

According to one embodiment of the present invention, it is possible to provide an insect trapping device that does not require supplementation of a consumption material for generating carbon dioxide gas.

The conceptual diagram of the insect trapping device by one form of this invention is shown. The perspective view of the insect trapping device by one form of the present invention is shown. The state which removed the upper surface and side surface of the housing | casing of the insect trap shown in FIG. The perspective view of the insect capture unit of the insect capture device shown in FIG. 2 is shown. 4B is an exploded view of the insect capture unit of FIG. 4A. FIG. It is the figure which looked at the room | chamber interior in the insect capture test of an Example from the top.

In a conventional insect trap, a carbon dioxide gas is newly generated by burning a combustible material or sublimating dry ice to create a concentration gradient. Therefore, in the conventional apparatus, in order to maintain the concentration gradient of carbon dioxide gas, it is necessary to replenish the material for generating carbon dioxide gas, which takes time and cost.

On the other hand, the insect trapping apparatus according to one embodiment of the present invention includes a carbon dioxide concentration unit that concentrates carbon dioxide in the air. This carbon dioxide concentrating unit can take in carbon dioxide in the air and release a gas containing carbon dioxide at a concentration higher than the concentration of carbon dioxide in the introduced air (also referred to as high-concentration carbon dioxide-containing gas). Means. Such a carbon dioxide concentration unit can locally increase the concentration of carbon dioxide in the space and form a concentration gradient of carbon dioxide for attracting insects. Since the apparatus according to the present embodiment does not require replenishment of materials, it is possible to save labor for maintaining the function of the apparatus.

In addition, when a conventional device that continuously generates carbon dioxide gas is used indoors, the concentration of carbon dioxide in the room increases, so that the resident may feel uncomfortable or in some cases Your health may be compromised. However, since the apparatus according to the present embodiment locally forms a portion where the concentration of carbon dioxide is high in the space, the indoor carbon dioxide concentration does not increase as a whole even if the device is used indoors. Therefore, the safety when used indoors is also high.

In FIG. 1, the conceptual diagram of the insect capture device 1 by one form of this invention is shown. As shown in FIG. 1, the insect capturing apparatus 1 includes a carbon dioxide concentration unit 10. The carbon dioxide concentrating unit 10 has a configuration for concentrating carbon dioxide (CO ₂ ) in the air, that is, a configuration for taking in air (Air) and releasing a high-concentration carbon dioxide-containing gas _GH .

The concentration of the high-concentration carbon dioxide-containing gas _GH released by the carbon dioxide concentration unit 10 can be a concentration that attracts insects to be captured, preferably 1000 ppm or more, more preferably 1200 ppm or more, and still more preferably. It may be 1400 ppm or more, particularly preferably 2000 ppm or more. By setting it as such a density | concentration, insects, especially flying insects, such as a mosquito and a fly, can be attracted effectively. Note that the upper limit of the carbon dioxide concentration in the high-concentration carbon dioxide-containing gas is determined by the installation location of the device, the indoor space when used indoors, the flow rate of the high-concentration carbon dioxide-containing gas released from the device, etc. However, from the viewpoint of safety, the carbon dioxide concentration in the high-concentration carbon dioxide-containing gas to be released may be 30000 ppm or less, preferably 10000 ppm or less. Even if the carbon dioxide concentration in the high-concentration carbon dioxide-containing gas is 30000 ppm or less, that is, the same or lower than the concentration of carbon dioxide in human breath, the formation of a region where the carbon dioxide concentration is excessively high can be achieved locally. Can be prevented and safety can be further improved. Further, it is preferable that the carbon dioxide concentration unit 10 can concentrate carbon dioxide in the air 3 times or more, preferably 4 times or more, more preferably 5 times or more.

As shown in FIG. 1, the insect capturing apparatus 1 may include an insect capturing unit 30 adjacent to the carbon dioxide concentration unit 10. The insect capturing unit 30 has a configuration for capturing and collecting insects that have been attracted to the high-concentration carbon dioxide gas _GH released from the carbon dioxide concentration unit 10 and have approached the insect capturing apparatus 1. The insect capturing unit 30 may include a filter having an eye smaller than the size of the insect to be captured, an adhesive sheet that allows fluid to permeate, an aggregate of adhesive threads as described later, and the like.

In addition, the insect capturing apparatus 1 may include a housing 20 that houses the carbon dioxide concentration unit 10. In the illustrated embodiment, the housing 20 includes a suction port 21, and air (Air) flows into the housing 20 from the suction port 21. The air that has flowed into the housing 20 in this way is taken into the carbon dioxide concentration unit 10. The insect capturing unit 30 described above may be disposed in the suction port 21.

Since the insect trapping unit 30 is disposed in the suction port 21, the insects in the air flowing into the housing 20 can be removed in advance, so that the insects enter the carbon dioxide concentration unit 10 to reduce its function. This can be prevented. In the illustrated embodiment, the insect capturing unit 30 is provided inside the housing 20, but may be provided outside the housing 20. In addition, the insect capturing unit 30 can be separated from the housing 20.

The appearance color of the housing 20 preferably includes at least one of black and brown, and more preferably the appearance color of the housing 20 is black or brown. Since small flying insects such as mosquitoes and flies are said to have a chemotaxis against black or brown, the insects are attracted to the insect trapping device 1 by setting the appearance color of the entire housing 20 to black or brown. It becomes easy and can raise the catch rate of insects.

The carbon dioxide concentration unit 10 has a carbon dioxide concentration unit 11 having a function of concentrating carbon dioxide, a first pump 12 that sends air to the carbon dioxide concentration unit 11, and the concentration of carbon dioxide from the carbon dioxide concentration unit 11 is increased. And a second pump 13 for drawing out the gas (gas containing high concentration carbon dioxide). The first pump 12 and the second pump 13 can efficiently release the high-concentration carbon dioxide-containing gas. However, if the carbon dioxide concentration unit 10 or the housing 20 has another configuration capable of releasing a sufficient amount of high-concentration carbon dioxide-containing gas, the first pump 12 and the second pump of the carbon dioxide concentration unit 10 At least one of them can be omitted.

The configuration of the carbon dioxide concentrating unit 11 is to concentrate carbon dioxide in the air without newly generating carbon dioxide gas, that is, to release carbon dioxide-containing gas by taking in carbon dioxide in the air. There is no particular limitation. The carbon dioxide concentration unit 11 may be a separation membrane having selective permeability to carbon dioxide, an adsorbent capable of reversibly adsorbing and desorbing carbon dioxide, and the like. Among these, it is preferable that the carbon dioxide concentration part 11 has a separation membrane because the concentration of the released carbon dioxide is easy to control.

The separation membrane having selective permeability to carbon dioxide in the carbon dioxide concentrating part 11 has high carbon dioxide gas permeability relative to air permeability, and the carbon dioxide gas permeability is relatively large. The permeability of at least one of nitrogen and oxygen can be relatively small. Thereby, the taken-in air can be separated into a gas having a high carbon dioxide concentration that has passed through the separation membrane and a gas having a low carbon dioxide concentration that has not passed through the separation membrane.

The permeability coefficient (permeability) of carbon dioxide in the separation membrane may be, for example, 2.5 times or more, preferably 3 times or more, more preferably 5 times or more of the air permeability coefficient. Further, the permeability coefficient of carbon dioxide gas may be 2.5 times or more, preferably 3 times or more, more preferably 5 times or more, more preferably 2.5 times or more, preferably 2.5 times or more of oxygen. May be 3 times or more, more preferably 5 times or more. The permeation coefficient (permeability) can be expressed as a unit thickness, a unit area, a unit time, and a volume per unit partial pressure difference between both surfaces of the gas permeating the membrane.

As the separation membrane, a membrane having selective permeability to carbon dioxide and selective permeability to water vapor is preferable. Thereby, since the density | concentration of the water vapor | steam contained in the discharge | released gas can be raised, the gas of the component close | similar to the expiration | expired_air of an animal can be discharge | released. Therefore, it is useful for attracting a type of insect (such as a mosquito) that detects the position in response to the breath of the animal. From the viewpoint of increasing the concentration of water vapor, a separation membrane having a water vapor permeability coefficient of 10 times or more, preferably 20 times or more, more preferably 50 times or more that of air can be used.

Note that the separation membrane may have a high selective permeability to components other than carbon dioxide in the air, that is, nitrogen or oxygen, or both. With such a separation membrane, the taken-in air can be separated into a gas having a low carbon dioxide concentration that has passed through the separation membrane and a gas having a high carbon dioxide concentration that has not passed through the separation membrane.

As described above, the separation membrane is made of a low-molecular or high-molecular organic material as long as it has a high selective permeability to carbon dioxide or a high selective permeability to nitrogen and / or oxygen. However, it may be made of an inorganic material. The separation membrane preferably contains silicone, polyethylene glycol, polyvinyl alcohol, a polymer such as polyimide, a ceramic such as zeolite, or the like. More specifically, examples include a silicone resin, silicone rubber, and liquid silicone coated on a porous membrane. Among these, a separation membrane made of silicone rubber is preferable because of its high carbon dioxide and water vapor permeability and relatively high strength.

When the carbon dioxide concentration unit 11 uses an adsorbent capable of adsorbing and desorbing carbon dioxide, the adsorbent may be a basic material having a primary to tertiary amine, a carbonate such as potassium carbonate or sodium carbonate, or activated carbon. , Zeolite, glass, alumina and the like can be used.

In the illustrated form, a hollow fiber membrane module having selective permeability to carbon dioxide is used as the carbon dioxide concentrating part 11. The hollow fiber membrane module is a module in which many hollow fiber membranes are bundled and accommodated in a casing or the like. The carbon dioxide concentrating part 11 using a hollow fiber membrane is preferable because the contact area with the gas can be increased. In the illustrated form, the carbon dioxide concentrating unit 11 takes in the air sent from the first pump 12 from the air inlet 113, permeates the hollow fiber membrane, and discharges it from the high concentration carbon dioxide-containing

gas outlets

114 a and 114 b. The low-concentration carbon dioxide-containing gas is discharged from the low-concentration carbon dioxide-containing gas outlet 115. The gas _GH released from the high-concentration carbon dioxide-containing

gas outlets

114a and 114b is drawn out by the second pump 13 and released from the outlet 22 to the outside. The flow rate of the high-concentration carbon dioxide-containing gas _GH discharged from the outlet 22, that is, discharged from the insect trapping apparatus 1, can be set to, for example, 0.05 L / min or more, preferably 0.1 L / min or more.

Further, the low-concentration carbon oxide-containing gas _GL released from the low-concentration carbon dioxide-containing gas outlet 115 of the carbon dioxide concentrating unit 11 is released to the outside through the outlet 23.

The carbon dioxide concentration unit 10 can be provided with an insect attractant supply unit 40 that can supply an attractant attracting insects to the gas. As shown in FIG. 1, the attracting substance supply unit 40 can be placed behind the low-concentration carbon dioxide-containing gas outlet 115 of the carbon dioxide concentration unit 11. Further, the attracting substance supply unit 40 can be provided at the high-concentration carbon dioxide-containing gas discharge port 22 of the casing 20, or provided independently of the carbon dioxide concentrating unit 10 and outside the casing 20. You can also. The attracting substance supplied by the attracting substance supply unit 40 may be anything that can attract insects to be captured. For example, when the target insect is a mosquito, an attracting substance such as lactic acid or fatty acid can be used.

The housing 20 may be provided at the outlet 24 with a fan 28 that sends the gas inside the housing 20 to the outside. Since the fan 28 is provided, the amount of air sucked from the suction port 21 of the housing 20 can be increased, and the insect capture efficiency can be increased. Depending on the configuration of the carbon dioxide concentrating unit 10 and the housing 20, the outlet 24 and the fan 28 can be omitted.

FIG. 2 shows an example of the insect trapping apparatus 1 according to one embodiment of the present invention more specifically. The insect capturing apparatus 1 shown in FIG. 2 includes a housing 20, and the carbon dioxide concentration unit 10 and the insect capturing unit 30 are disposed inside the housing 20. In FIG. 2,

outlets

22 and 23 provided on the side surface of the housing 20 are shown. A high-concentration carbon dioxide-containing gas discharge pipe 18 extends from the outlet 22, and the high-concentration carbon dioxide-containing gas discharge pipe 18 is connected to the high-concentration carbon dioxide-containing gas outlet of the carbon dioxide concentration unit 11 in the housing 20. 114a and 114b are pipes connected to the first pump 13 (FIG. 1). The discharge pipe 18 extending from the outlet 22 is formed in an annular shape so as to surround the housing 20. A plurality of discharge holes 18 a are provided in the discharge pipe 18, and the high-concentration carbon dioxide-containing gas _GH can be discharged from the discharge holes 18 a around the housing 20 in a plurality of different directions.

A discharge pipe 19 for low-concentration carbon dioxide-containing gas extends from the outlet 23, and this low-concentration carbon dioxide-containing gas discharge pipe 19 is provided with the low-concentration carbon dioxide-containing gas in the carbon oxide concentrating part 11 in the housing 20. It is a tube that is connected to the gas outlet 115 via the attracting substance supply unit 40 (FIG. 1) and discharges the low-concentration carbon dioxide-containing gas _GL containing the attracting substance. The discharge pipe 19 extending from the outlet 23 is annularly arranged on the housing 20. A plurality of discharge holes 19 a are provided in the discharge pipe 19, and a low-concentration carbon dioxide-containing gas containing an attracting substance can be discharged from the discharge holes 19 a to the outside of the housing 20.

The suction port 21 is provided on the upper surface of the housing 20, and a heat radiating plate 25 is provided so as to cover the suction port 21. The heat generated by the insect trap 1 can be efficiently released to the outside by the heat radiating plate 25. Moreover, since the heat sink 25 can create a temperature gradient around the insect trapping apparatus 1, it is useful for capturing insects that are attracted by sensing the temperature gradient.

FIG. 3 shows a state in which the upper surface and the side surface of the case 20 of the insect capturing apparatus 1 of FIG. In FIG. 3, each element is schematically shown, and details such as electrical connection are omitted. As shown in FIG. 3, a carbon dioxide concentrating unit 10 having a carbon dioxide concentrating unit 11, a first pump 12 disposed in front of the carbon dioxide concentrating unit 11, and a second pump 13 disposed in the rear thereof. Is arranged. Moreover, the power supply part 14 and the control part 15 for operating the 1st pump 12 and the 2nd pump 13, and the counting part 31 (after-mentioned) of the insect capture unit 30 as needed may be provided, and if needed A transformer or the like may be provided. As a power source for the insect trapping apparatus 1, a commercial power source, a primary battery, a secondary battery, or the like can be used. In addition, when a power generation device (solar power generator or the like) using renewable energy is used, the insect trapping device 1 can be used for a long time even in a place where there is no commercial power source.

FIG. 4A shows an example of the insect capturing unit 30. The insect capturing unit 30 shown in FIG. 4A has a configuration in which a counting unit 31 for counting insects and a capturing unit 32 for capturing insects are overlapped. An auxiliary capturing part 33 is provided below the capturing part 32, and a bottom part 34 is provided below the auxiliary capturing part 33.

FIG. 4B shows an exploded view of the insect capturing unit 30 in FIG. 4A. As shown in FIG. 4B, the insect capturing unit 30 may be composed of a plurality of parts. The counting unit 31 includes a holder 31a having a passage through which gas can permeate at the center. Slits are formed on both side surfaces of the passage, and the counting sensor 35 can be provided so as to fit into the slits. The counting sensor 35 may be an area detection type sensor or the like that can detect insects with a light projecting unit and a light receiving unit.

Also, the capture unit 32 includes a holder 32a similar to the holder 31a. An insert 32b provided with a plurality of adhesive threads 38 for adhering and capturing insects can be inserted into the slits of the holder 32a. The adhesive yarn 38 may be, for example, a yarn obtained by applying an adhesive composition to natural fibers such as cotton, hemp, and hair, or chemical fibers such as acrylic, polyester, nylon, rayon, and acetate. It can arrange | position with the space | interval according to the magnitude | size of the target insect. The adhesive yarns 38 may be arranged in parallel to each other or may be arranged so as to cross each other. Since the sticky element is arranged in the insert 32b, it is possible to reliably catch the insect. Further, from the viewpoint that the insect 32 can be captured and recovered without crushing, it is preferable that the insert 32b is provided with a non-adhesive element (such as a non-adhesive net or filter).

As shown in FIG. 4B, an auxiliary capture unit 33 is disposed below the capture unit 32. The auxiliary capture unit 33 can capture insects that could not be captured by the capture unit 32 and can capture small garbage other than insects. The capture unit 32 also includes a holder 33a similar to the

holders

31a and 32a, and an insert 33b in which a filter is arranged can be inserted into the slit. The filter arranged in the insert 33b is not particularly limited as long as it can transmit gas and collect minute solids. This filter is preferably a sheet having air permeability and adhesiveness on the surface. Note that the auxiliary capture unit 33 can be omitted if the capture unit 32 can reliably capture insects and remove dust and the like.

It should be noted that the configuration of the insect trapping apparatus 1 shown in FIGS. 2 to 4B is merely an example, and various modifications and changes can be made without departing from the scope of the claims.

The insect capturing apparatus 1 of this embodiment can be used for capturing insects that have a positive chemotaxis against carbon dioxide. The device of this embodiment is a blood-sucking insect such as a flying insect, especially a mosquito, such as a mosquito (eg, Aedes albopictus, Aedes aegypti), mosquito (eg, mosquito), anopheles, flies, eg, Drosophila , Mites such as tsutsugamushi, ticks, and the like.

Moreover, one form of the present invention may be an insect capturing method using the insect capturing apparatus 1 described above. More specifically, this form may be an insect trapping method including a carbon dioxide concentration step for concentrating carbon dioxide in the air. According to this insect capturing method, since it is not necessary to replenish the consumption material for generating carbon dioxide, labor and cost can be saved. Further, since it is not a device that newly generates carbon dioxide, the concentration of carbon dioxide around the device does not continue to rise, and it can be used safely indoors.

(Example 1)
An insect trapping device having a configuration as shown in FIGS. 2 and 3 was prepared. The carbon dioxide concentrating unit 11 is a hollow housing a configuration in which 38,500 silicone hollow fiber membranes having an inner diameter of 170 μm, an outer diameter of 250 μm, and an effective length of 200 mm are bundled (effective membrane area: 0.54 m ² ). A thread membrane module (trade name: NAGASEP M40-05S, manufactured by Nagayanagi Kogyo Co., Ltd.) was used.

In addition, an insect capturing unit similar to that described with reference to FIGS. 4A and 4B was disposed at the suction port of the housing. For the trapping part included in the insect trapping unit, an insert in which adhesive yarn (made of nylon) was juxtaposed at an interval of 0.8 mm in an 80 mm × 80 mm gas passage was used.

The color of the housing surface of the insect trapping apparatus of Example 1 shown in FIGS. 4A and 4B was black.

(Comparative Example 1)
A commercially available mosquito trap was prepared as a comparative device. In the apparatus, air sucked from a suction port by a blower is exhausted through a filtration filter, and an adhesive sheet is provided on the suction port side of the filtration filter. Moreover, the external appearance of a housing | casing is black.

<Insect capture test>
The apparatuses of Example 1 and Comparative Example 1 were installed in a sealed unmanned test chamber (equivalent to 6 tatami mats, floor area 10.2 m ² (2.9 m × 3.5 m), height 2.2 m). Both devices were placed 30 cm away from the wall on the floor. Moreover, the container which put sugar water was arrange | positioned in two places of the corner of a room (FIG. 5).

From the center of the test room, 100 Aedes albopictus (11 to 21 days after emergence) females were released. Then, for 3 hours from the start of the test, an indoor lamp installed on the ceiling of the room was turned on to keep the room bright. Thereafter, the light was turned off and the room was kept dark for 8 hours. Furthermore, the room light was turned on again to keep the room bright for 11 hours. Thus, after the test time of 22 hours in total, the number of insects trapped in the insect trapping device was measured.

During the test, the apparatus of Example 1 was operated so that the air volume at the suction port was 1 m ³ / min. The carbon dioxide concentration in the gas released from the high concentration carbon dioxide-containing gas discharge hole was 1400 ppm. The apparatus of Comparative Example 1 was operated in “sleep mode” (air flow 1 m ³ / min). The carbon dioxide concentration was measured with a gas detector tube.

The same test was repeated two more times for a total of three tests. The number of released human mosquitoes was 95 in the second test (12-22 days after emergence) and 93 (13-23 days after emergence) in the third test.

In addition, although the ultraviolet light source is provided in the apparatus of the comparative example 1 as mentioned above, it is known that Aedes albopictus does not have the chemotaxis with respect to an ultraviolet-ray. Therefore, it is considered that the ultraviolet light source of the apparatus of Comparative Example 1 has no influence on this test.

<Insect counting>
About the apparatus of Example 1 after the test, the capture part was taken out, and the number of insects attached to the filter (adhesive yarn) was visually counted. The number of insects that did not adhere to the filter but entered the device was also counted. About the apparatus of the comparative example 1, the part provided with the filtration filter was removed and the number of the insects adhering to the adhesive sheet was counted visually. The number of insects that did not adhere to the adhesive sheet but entered the device was also counted. Also, the number of insects that were not captured by any device and remained in the room was counted.

Table 1 shows the results. The capture rate (%) was the total of the number of captures of three tests with respect to the number of samples.

From Table 1, it was confirmed that the insect trapping apparatus of Example 1 that attracts insects using carbon dioxide exhibits a better insect capture rate than the insect trapping apparatus of Comparative Example 1.

This application claims priority based on Japanese Patent Application No. 2018-016383 filed with the Japan Patent Office on February 1, 2018, the entire contents of which are incorporated herein by reference.

DESCRIPTION OF SYMBOLS 1 Insect capture apparatus 10 Carbon dioxide concentration unit 11 Carbon dioxide concentration part (hollow fiber membrane module)
12 First Pump 13 Second Pump 14 Power Supply Unit 15 Transformer 16 Control Unit 18 High Concentration CO ₂ Containing Gas Release Pipe 18a High Concentration CO ₂ Containing Gas Release Hole 19 Low Concentration CO ₂ Containing Gas Release Pipe 19a Low Concentration CO ₂ Contained gas discharge hole 20 Housing 21 Suction port 22 Outlet (high concentration CO ₂ containing gas outlet)
23 Exit (Low concentration CO ₂ containing gas exit)
24 outlet 25 heat radiating plate 28 fan 30 insect capturing unit 31 counting unit 31a holder 32 capturing unit 32a holder 32b insert 33 auxiliary capturing unit 33a holder 33b insert 34 bottom 35 counting sensor 38 adhesive yarn 39 breathable membrane 40 attracting substance supply unit 113

air Inlet

114a, 114b High concentration CO ₂ containing gas outlet 115 Low concentration CO ₂ containing gas outlet _GH High concentration CO ₂ containing gas _GL Low concentration CO ₂ containing gas

Claims

An insect trap equipped with a carbon dioxide concentration unit that concentrates carbon dioxide in the air.
The insect trapping apparatus according to claim 1, wherein the carbon dioxide concentration unit takes in air and releases the air having a carbon dioxide concentration of 1000 ppm or more.
The insect trapping device according to claim 1, comprising an insect trapping unit adjacent to the carbon dioxide concentration unit.
Containing the carbon dioxide concentration unit, further comprising a housing having a suction port;
The insect trapping device according to claim 3, wherein the insect trapping unit is disposed in the suction port.
The insect trapping device according to claim 4, wherein the appearance color of the housing is black or brown.
The carbon dioxide enrichment unit is
A carbon dioxide enrichment section;
A first pump for sending air to the carbon dioxide concentrating section;
The insect trapping device according to claim 1, further comprising a second pump for drawing a gas having an increased carbon dioxide concentration from the carbon dioxide concentrating unit.
The insect trapping apparatus according to claim 6, wherein the carbon dioxide concentrating part has a separation membrane.
The insect trapping device according to claim 7, wherein the separation membrane contains silicone.
The insect trapping device according to claim 1, further comprising an insect attracting substance supply unit.
An insect trapping method including a carbon dioxide concentration step for concentrating carbon dioxide in the air.