JP2005073647A - Blood-sucking insect collector and carbon dioxide generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blood-sucking insect collector that can retain the release of carbon dioxide at almost constant level with a simple structure. <P>SOLUTION: The mosquito collector 1 is equipped with a carbon dioxide generator 2 and a mosquito-adhesive pad 4 that adheres the mosquitoes M induced by the carbon dioxide released from the carbon dioxide generator 2, and the carbon dioxide generator 2 is covered with a gas-permeating multiple-layer film made of TPX (polymethyl terpene, TPX is a commercial name) and a polyolefin. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a blood-sucking insect collector that attracts and collects blood-sucking insects such as mosquitoes and a carbon dioxide generating member used therefor.

It is well known that mosquitoes, which are blood-sucking insects that suck blood such as humans, may not only cause inflammation at the stabbed site, but also mediate infectious diseases such as malaria and West Nile encephalitis. In order to control such mosquitoes, various control agents and control devices are widely provided.
For example, there are so-called mosquito coils, electronic mosquito traps, and spray-type insecticides as pesticides, all of which use a mosquito repellent such as DEET (N, N-diethyl-m-toluamide).
However, many people have anxiety and resistance to using mosquito repellents, that is, chemicals, such as when they have infants or have allergies to chemicals.

In order to get rid of mosquitoes without relying on mosquito repellents, there are those utilizing the property that mosquitoes are attracted to carbon dioxide (see, for example, Patent Documents 1, 2, and 3).
In the case of Patent Literatures 1 and 2, carbon dioxide gas is generated from a carbon dioxide gas cylinder, or carbon dioxide gas is generated by burning LP gas, and the carbon dioxide gas is naturally diffused to attract mosquitoes. Moreover, in the case of patent document 3, while attracting a mosquito by generation | occurrence | production of a carbon dioxide gas similarly, the retention part for temporarily retaining the diffused carbon dioxide gas so that a carbon dioxide gas density | concentration may be maintained at an appropriate density | concentration The structure which provides is adopted.

JP-A-10-229801 JP 2000-189030 A JP-A-11-346628

By the way, the conventional mosquito trap has a problem described below.
That is, although the mosquito traps described in Patent Documents 1, 2, and 3 can continuously generate carbon dioxide, the concentration of carbon dioxide tends to be affected by atmospheric conditions (wind strength and direction). Have a problem. For this reason, it is necessary to predict the usage situation in advance according to the installation location of the mosquito catcher and adjust it in advance so that the amount of carbon dioxide emission becomes appropriate, but depending on the proficiency level of the person handling this, carbon dioxide gas There is a possibility that the concentration may change greatly. Therefore, there is a concern that the attracting rate of mosquitoes is not always constant and changes greatly.
A method of continuously releasing the carbon dioxide emission amount without worrying about the diffusion state of the carbon dioxide gas is also conceivable, but in this case, since the carbon dioxide gas is released wastefully, the running cost tends to be high, There is a possibility of causing another problem that it is not preferable in view of the influence on the environment.

  The present invention has been made based on such a technical problem, and an object of the present invention is to provide a blood-sucking insect collector and the like that can maintain the carbon dioxide emission amount substantially constant with a simple configuration.

For this purpose, the blood-sucking insect collector of the present invention includes a carbon dioxide generating source that generates carbon dioxide, and a trapping unit that captures the blood-sucking insects attracted by the carbon dioxide released from the carbon dioxide generating source. And a cover that covers the carbon dioxide generating source and limits the amount of carbon dioxide released from the carbon dioxide generating source.
At this time, the cover adjusts the supply amount of the reaction medium such as oxygen and water necessary for the carbon dioxide gas generation source to generate carbon dioxide, thereby reducing the amount of carbon dioxide emission generated from the carbon dioxide gas generation source. It can also be restricted.
In addition, the amount of carbon dioxide itself permeated through the cover from the carbon dioxide generation source and released to the surroundings can be limited by the cover.
As such a cover, for example, a multilayer film of polymethylpentene and polyolefin resin having gas permeability is suitable.

Further, the carbon dioxide generating source can be a carbon dioxide generating agent containing ascorbic acids. In this case, the amount of oxygen permeating through the cover is 3 ml / m ² · 24 hr · atm and more than 30 at 25 ° C. and 1 atm, when the oxygen permeation amount per 1 m ² permeation area is 24 hours.
000 ml / m ² · 24 hr · atm or less is preferable. If the amount of oxygen permeating the cover is less than 3 ml / m ² · 24 hr · atm, the carbon dioxide generator cannot obtain a sufficient oxygen absorption / carbon dioxide generation reaction. Therefore, the amount of carbon dioxide generated is insufficient to attract blood-sucking insects. On the other hand, when the amount of oxygen permeating through the cover is more than 30000 ml / m ² · 24 hr · atm, the reaction of oxygen absorption and carbon dioxide generation in the carbon dioxide generator is excessively generated. Therefore, there is a possibility that the carbon dioxide gas is consumed unnecessarily. For the above reasons, the amount of oxygen permeating the cover is 3 ml / m ² · 24 hr · a
It is preferably tm or more and 30000 ml / m ² · 24 hr · atm or less.

Also, when the amount of carbon dioxide released to the surroundings is limited by the cover, the amount of carbon dioxide permeated per 1 m ² permeation area under the conditions of 25 ° C. and 1 atm. at 24 hr or, preferably set to 10ml / m ² · 24hr · atm or more and 110000ml / m ² · 24hr · atm or less. If the amount of carbon dioxide passing through the cover is less than 10 ml / m ² · 24 hr · atm, the amount of carbon dioxide is insufficient to attract blood-sucking insects. On the other hand, if the amount of carbon dioxide passing through the cover is larger than 110000 ml / m ² · 24 hr · atm, carbon dioxide may be consumed unnecessarily. For the above reasons, the amount of carbon dioxide permeating through the cover is 10 ml / m ² · 24 hr · atm or more and 110,000 ml.
/ M ² · 24 hr · atm or less is preferable.

The present invention can also be regarded as a carbon dioxide generating member that is attached to a blood sucking insect collector in a removable state and generates carbon dioxide for attracting the blood sucking insect. The carbon dioxide generating member is fixed to the collector in a detachable state, is supported by the fixing frame, and generates a carbon dioxide generating source that generates carbon dioxide, and covers the carbon dioxide generating source. And a cover comprising a multilayer film of polymethylpentene and polyolefin resin having gas permeability.
As the carbon dioxide gas generation source, one containing ascorbic acids can be employed.

  According to the present invention, when a carbon dioxide gas generation source that absorbs oxygen and generates carbon dioxide gas is adopted, the oxygen absorption amount can be suppressed to a predetermined amount by the cover, so that carbon dioxide gas is generated wastefully. In other words, the carbon dioxide emission amount can be maintained substantially constant. Further, even when a carbon dioxide gas generation source that can generate carbon dioxide gas without using oxygen suction is adopted as the carbon dioxide gas generation source, the carbon dioxide gas release amount can be maintained substantially constant by the cover. In addition, in any of these cases, the carbon dioxide gas generation source can be simply covered with the cover, so that the carbon dioxide emission amount can be maintained substantially constant with a simple structure. As a result, the concentration of carbon dioxide can be controlled to be suitable for attracting blood-sucking insects, and the service life of the carbon dioxide source can be extended. As a result, the collector can be made excellent in cost performance.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.
An embodiment of the blood-sucking insect collector according to the present invention will be described below with reference to the drawings, but the present invention is of course not limited to this. FIG. 1 is a perspective view showing a blood-sucking insect collector according to this embodiment. FIG. 2 is a view for explaining the internal structure of the blood-sucking insect collector, and is a vertical cross-sectional view taken along the line AA in FIG. FIG. 3 is a diagram showing details of the internal structure of the blood-sucking insect collector, and is an enlarged view of part B of FIG. FIG. 4 is a cross-sectional view showing an experimental apparatus for conducting an experiment for attracting blood-sucking insects. FIG. 5 is a graph showing the results of experimentally determining the effect of the coating film on the amount of carbon dioxide generated from a carbon dioxide generator mainly composed of ascorbic acids, where the horizontal axis represents the reaction elapsed time, and the vertical axis Indicates the carbon dioxide concentration.

  As shown in FIGS. 1 and 2, a mosquito collecting device (collector) 1 according to the present embodiment includes a carbon dioxide generating section (carbon dioxide generating source) 2 and a case 3 that houses the carbon dioxide generating section 2. And an adhesive pad (collecting part) 4 and a heater 5 housed in the case 3.

  As shown in FIG. 3, the carbon dioxide generating section 2 is mainly composed of ascorbic acids, and water, activated carbon, and granular thermoplastic resin are added to the chemical 2a to form a sheet, and oxygen absorption It is covered (sealed) with a gas permeable film (cover) 2b so as to cover the entire surface (outer surface). The carbon dioxide generating section 2 is provided with a fixed frame 6 formed of cardboard or resin on the outer periphery thereof, and is held by the case 3 via the fixed frame 6.

The carbon dioxide generating section 2 has a function of causing a chemical reaction when the ascorbic acid as the main component absorbs oxygen in the air and generating carbon dioxide and reaction heat to the surroundings.
The total amount of carbon dioxide released from the carbon dioxide generator 2 (total amount released from the start of use until the end of its life) is adjusted by the content of ascorbic acids as the main agent, the number and size of the medicine 2a, etc. be able to. Further, the amount of carbon dioxide released may be adjusted according to the carbon dioxide concentration suitable for attracting mosquitoes, as long as the amount of oxygen absorbed into the drug 2a is adjusted. In fact, as will be described later, if the carbon dioxide concentration is too low or too high, it does not have a good effect in attracting mosquitoes, and it is important to maintain the “optimal” carbon dioxide concentration.

  The gas permeable film 2b is a sealed case in which a co-extruded multilayer film (multilayer film) made of TPX (polymethylpentene: TPX is a registered trademark) and a polyolefin resin is formed in a bag shape. The oxygen contained in the air is guided to the internal drug 2a, and the carbon dioxide gas and reaction heat released from the drug 2a can also be diffused to the outside by allowing them to permeate themselves. Moreover, the gas permeable film 2b at this time restricts the amount of oxygen (air amount) that permeates itself toward the internal medicine 2a so as not to exceed a predetermined amount. Thereby, it is possible to suppress the chemical reaction due to oxygen absorption of the medicine 2a from occurring excessively, and as a result, it is possible to keep the generation amount of carbon dioxide gas and the calorific value substantially constant. That is, the chemical reaction time of the medicine 2a (and consequently the life as a carbon dioxide gas generating agent) can be kept long.

Specifically the oxygen permeability which transmits gas permeable film 2b, 25 ° C., under the conditions of 1 atm, the oxygen permeation amount per permeation area of 1 m ² is at ^{24hr, 3ml / m 2 · 24hr} · It is preferable that it is at least and 30000 ml / m ² · 24 hr · atm. That is, when the amount of permeated oxygen is less than 3 ml / m ² · 24 hr · atm, the drug 2a cannot cause a sufficient oxygen absorption / carbon dioxide gas generation reaction. Therefore, the amount of carbon dioxide generated is insufficient to attract mosquitoes. On the other hand, if the amount of oxygen to be permeated is larger than 30000 ml / m ² · 24 hr · atm, the reaction of oxygen absorption and carbon dioxide generation in the medicine 2a occurs excessively. And there is a possibility that the carbon dioxide gas will be consumed wastefully (that is, the medicine 2a will be consumed wastefully). For the above reason, the amount of oxygen transmitted through the gas permeable film 2b, it is preferable 3ml / m ² · 24hr · atm or more and is less than ^{30000ml / m 2 · 24hr · atm} .
The oxygen permeation amount of the gas permeable film 2b can be controlled only by changing the thickness dimension and the type of polyolefin resin laminated on the TPX. Therefore, the amount of carbon dioxide released from the medicine 2a and the duration of release can be controlled by appropriately changing these.

Further, the gas permeable film 2b is excellent in chemical resistance and heat resistance, and has material characteristics that can be easily processed by heat sealing or the like. Moreover, since it is made of an olefin-based resin, it is excellent in terms of disposal and has a low environmental load.
As the gas permeable film 2b, for example, an OT film series (trade name: OTP series, OTE series, OTK series, OTS series, etc., manufactured by Otsuka Techno Co., Ltd.) can be employed. Incidentally, the amount of oxygen permeation when OTS-50 is used is 10,900 cc / 24 h under the condition of a permeation area of 1 m ² and 1 atm. Moreover, about reaction heat, it heats up to about 40-50 degreeC.

The carbon dioxide generator 2 is vacuum-sealed in an airtight aluminum pack (pack) 2c when it is in a new state (when not used without causing a chemical reaction), and a chemical reaction due to oxygen absorption in the air. Protected against waking up. In use, as shown in FIG. 1, the aluminum pack 2c is unsealed and the carbon dioxide gas generating part 2 is simply taken out from the inside, and the drug 2a is naturally in the surrounding air through the gas permeable film 2b. Oxygen is taken in and causes a chemical reaction, and then carbon dioxide and heat of reaction start to be released to the surroundings. And by accommodating this carbon dioxide generating part 2 in the case 3, it is possible to exert an attraction effect for attracting mosquitoes with carbon dioxide and reaction heat. Moreover, the carbon dioxide generating section 2 has a compact size and shape of, for example, 125 mm long x 80 mm wide x 5 mm thick even when accommodated in the aluminum pack 2c, and is suitable for storage and management. .
As the carbon dioxide generating section 2, for example, a commercially available AnaeroPouch series (trade name: AnaeroPouch Kenki, AnaeroPouch Campylo: manufactured by Mitsubishi Gas Chemical Co., Ltd.) can be used.

The case 3 is a thin box-shaped hollow case made of, for example, a plastic resin, and is installed in a state where it is attached to, for example, an indoor wall surface W as shown in FIG. Reference numeral 3 a shown in the figure is a double-sided tape for adhering the case 3 to the wall surface W, and a plurality of tapes are attached to the back surface of the case 3.
The case 3 is formed with an opening 3c leading to the internal space 3b so as to face downward in the installed state. The opening 3c has an elongated rectangular shape, and takes in air (oxygen) from the external space around the case 3 toward the internal space 3b, and the carbon dioxide released from the carbon dioxide generator 2 into the internal space 3b. It functions as a vent that discharges gas from the internal space 3b to the external space around the case 3.
Inside the case 3, guide rails 7 and 8 extending from the opening 3c toward the back of the case 3 are provided. The guide rails 7 and 8 are configured to slidably support the fixed frame 6 and the adhesive pad 4 of the carbon dioxide generator 2. The opening 3c is used to attach a new carbon dioxide generator 2 or adhesive pad 4 in the case 3, or conversely, to remove a used carbon dioxide generator 2 or adhesive pad 4 from the case 3 Also serves as a role.

The position of the opening 3c is not limited to the above position. However, since carbon dioxide has a characteristic that the specific gravity is larger than the atmosphere and is directed downward, if the position of the opening 3c is arranged directly below as in the present embodiment, the carbon dioxide generated in the case 3 is lower in the opening 3c. It will quickly flow out through. Thereby, the surrounding space centering on the opening 3c is covered with carbon dioxide gas, and mosquitoes can be effectively attracted into the case 3.
Of course, the material and shape of the case 3 are not limited to those of the present embodiment, and other materials and shapes may be used.

The pressure-sensitive adhesive pad 4 is obtained by applying a pressure-sensitive adhesive to a sheet-shaped pressure-sensitive adhesive tape or a plate-shaped base material surface, and has a surface having adhesiveness. As shown in FIGS. 2 and 3, the adhesive pad 4 is arranged at a position facing the carbon dioxide generating section 2 with the internal space 3b interposed therebetween. In other words, the internal space 3b is formed between the adhesive surface of the adhesive pad 4 and the carbon dioxide generating surface of the carbon dioxide generating unit 2, and the opening 3c is disposed immediately below the internal space 3b. Yes.
Therefore, the mosquito M caught by carbon dioxide and attracted into the internal space 3b stays on the adhesive surface which is the vertical plane of the adhesive pad 4 due to the property that it easily stays on the vertical surface, and finally the adhesive pad 4 Is being collected against. The meaning of fixing the case 3 to the wall surface W so as to face the vertical direction is to form a vertical plane on the adhesive pad 4 utilizing the properties of the mosquito M as described above.

  The heater 5 is a sheet-like electric heater, and is a heating element that plays a role of supplementing the calorific value when the reaction heat of the carbon dioxide generating unit 2 is insufficient to attract the mosquito M effectively. . Of course, when a sufficient calorific value can be obtained only with the reaction heat of the carbon dioxide generating section 2, the heater 5 may be omitted.

According to the mosquito collecting instrument 1 of the present embodiment having the above-described configuration, ascorbic acids generate carbon dioxide gas by sucking oxygen contained in the air taken into the internal space 3b and simultaneously generate reaction heat. To emit. These carbon dioxide gas and reaction heat are filled in the internal space 3b, and surplus flows out of the case 3 from the opening 3c.
The mosquito M sniffing the flowing carbon dioxide and reaction heat enters the internal space 3b through the opening 3c. Further, the mosquito M stays on the adhesive pad 4 and is collected according to the property of staying with respect to the vertical plane.

The ascorbic acids used for attracting the mosquito M in this way are extremely compact and inexpensive compared to the conventional carbon dioxide generating source using a cylinder device. Thereby, the mosquito collecting device 1 itself can be reduced in size and weight. In addition, ascorbic acids are capable of generating carbon dioxide simply by sucking oxygen, and thus are superior in handling properties compared to conventional carbon dioxide generating sources such as dry ice.
Moreover, in the mosquito collecting device 1 of the present embodiment, not only the generation of carbon dioxide gas but also the heat generated by the reaction of ascorbic acids, it is possible to attract the mosquito M more effectively.

Moreover, according to the mosquito collecting instrument 1 of the present embodiment, the gas permeable film 2b can suppress the oxygen absorption amount of the medicine 2a to a predetermined amount, so that carbon dioxide gas and reaction heat can be generated unnecessarily. In addition, it is possible to maintain the carbon dioxide emission amount and the reaction heat amount substantially constant. In addition, since it is sufficient to simply cover the medicine 2a with the gas permeable film 2b, it is possible to maintain the carbon dioxide gas release amount and the reaction heat amount substantially constant with a simple structure. Accordingly, it is possible to continuously generate carbon dioxide gas and reaction heat for a relatively long time. And since the chemical | medical agent 2a has an organic substance as a main component, it can be processed as a combustible substance after use, and is excellent in discardability. Moreover, since the gas-permeable film 2b is also excellent in discardability as described above, the carbon dioxide gas generating unit 2 as a whole is also excellent in discardability.
Moreover, since the gas permeable film 2b is a thin film shape, it does not interfere with the compactness of the carbon dioxide generating part 2, and hence the compactness of the mosquito collecting device 1.

In the present embodiment, the case where the chemical 2a mainly composed of ascorbic acid is used as the carbon dioxide generation source has been described as an example. However, the present invention is not limited to this, and a configuration using other carbon dioxide generation sources is also possible. However, in that case, it is necessary to suppress the amount of carbon dioxide gas that flows through the gas permeable film 2b and flows to the outside.
More specifically, the amount of carbon dioxide gas permeating through the gas permeable film 2b is 10 ml / m ² when the carbon dioxide gas permeation area per 1 m ² is 24 hr under the conditions of 25 ° C. and 1 atm. It is preferably 24 hr · atm or more and 110,000 ml / m ² · 24 hr · atm or less. That is, if the amount of carbon dioxide gas that permeates through the gas permeable film 2b is less than 10 ml / m ² · 24 hr · atm, it is insufficient to attract the mosquito M. On the other hand, if the amount of carbon dioxide passing through the gas permeable film 2b is larger than 110000 ml / m ² · 24 hr · atm, carbon dioxide may be consumed unnecessarily. For the above reason, the amount of carbon dioxide gas passing through the gas permeable film 2b, is preferably 10ml / m ² · 24hr · atm or more and is less ^{110000ml / m 2 · 24hr · atm} .

Since it was confirmed by experiments that the main component of the ascorbic acid generator is ascorbic acid as the carbon dioxide generating part 2, the results are shown in Example 1 below.
<Example 1>
As sources of carbon dioxide, (1) Effervescent tablets (two Kao babs (trade name) plus 100 ml of water), (2) 25 g of dry ice, (3) AnaeroPouch Kenki (mainly ascorbic acids) Three types of (medicine) were prepared, and an experiment for attracting mosquito M by these was conducted.
As shown in FIG. 4, each of the carbon dioxide gas generation sources 10 was housed in an individual acrylic case 11 (capacity 4 L). An adhesive sheet 12 was arranged around each carbon dioxide generation source 10 so that the mosquito M approaching each carbon dioxide generation source 10 was collected. Next to the acrylic case 11, an introduction tube (φ3 cm, length 10 cm) 13 through which the mosquito M enters is connected.
Then, a sucking tube 14 containing 50 female mosquitoes of Culex mosquitoes was connected to the introduction tube 13, and the movement status of the squid and the collection status on the adhesive sheet 12 from the fluking tube 14 into the acrylic case 11 were confirmed. .

As a result, (1) In the case of effervescent tablets, 26 squids moved into the acrylic case 11. However, it was not collected by the adhesive sheet 12 and landed on the inner wall surface of the acrylic case 11.
In the case of (2) dry ice, the squid did not move from the sucker tube 14 at all.
In the case of (3) AnaeroPouch Kenki, all squids have moved into the acrylic case 11. Moreover, 32 of them, 64%, were collected in the adhesive sheet 12.

From the above results, the following was found.
That is, (1) In the case of effervescent tablets, a small amount of squid was attracted. However, because the carbon dioxide release was completed in a short time, the accretion behavior that led to the blood sucking behavior did not occur.
In addition, in the case of (2) dry ice, the environmental temperature is lowered when carbon dioxide gas is generated, and this lowering of temperature suppresses the behavior of the squid.
And (3) In the case of AnaeroPouch Kenken, the reaction heat of ascorbic acids was added to the generation of carbon dioxide, which functioned as a very strong attraction source.

Subsequently, since it was confirmed by experiment that the gas permeable film 2b made of TPX and a polyolefin-based resin is optimal as a sealing case for the medicine 2a in the carbon dioxide generating section 2, the result is shown in Example 2 below. Show.
<Example 2>
One OTS-50 (trade name, a kind of OT film, thickness) corresponding to the gas permeable film 2b, one of the above-mentioned AnaeroPouch. Three types, one sealed to 50 μm), one sealed to a TPX film (manufactured by Otsuka Techno Co., Ltd.), and one not sealed, were prepared, and changes in the amount of carbon dioxide gas released over time were determined. In addition, when sealing to OTS-50 and a TPX film, it sealed with the heat sealer.

First, the prepared three types of carbon dioxide generation sources were respectively accommodated in individual cases (capacity: about 840 ml), and the carbon dioxide concentration in the case was measured using a gas detection tube at regular intervals. As a result, a result as shown in FIG. 5 was obtained.
As shown in the figure, in the carbon dioxide generation source (for anaerobic) that is not sealed in the film, carbon dioxide begins to be generated abruptly immediately after the carbon dioxide generation source is inserted, and after 15 minutes, the gas detector tube The concentration reached a high concentration of 0.7% or more, which is the upper limit of detection, and the release of carbon dioxide gas was completed in just one hour. After 210 minutes or more, the concentration decreased to a measurable range, but this was a concentration decrease due to natural diffusion.

  In addition, in the carbon dioxide gas generation source (anaerobic + TPX) sealed in the TPX film which is the base material of the OT film, the carbon dioxide gas starts to be released immediately after being put in the case, as in the case where the gas is not sealed. Until then, the measurement limit was exceeded. After 210 minutes or more, the concentration dropped to a measurable range, but again in this case, the concentration was lowered due to natural diffusion.

On the other hand, in the case of a carbon dioxide gas generation source (anaerobic + OTS-50) sealed in OTS-50, a substantially constant carbon dioxide concentration of 0.13 to 0.15% could be maintained until the measurement was completed.
From the above results, it was impossible to maintain a constant carbon dioxide gas release amount (concentration) with a single carbon dioxide gas source or a TPX film sealed with this. On the other hand, what is sealed in the OT film allows only a certain amount of oxygen to permeate into the sealed case, so that the amount of generated carbon dioxide is constant and it is possible to continue releasing carbon dioxide for a long time. It was confirmed.

Subsequently, a case in which the mosquito M was actually attracted using the three types of carbon dioxide generation sources prepared in Example 2 was confirmed by experiments, and the result is shown in Example 3 below.
<Example 3>
The three types of carbon dioxide gas generation sources are accommodated in the experimental apparatus shown in FIG. 4 described in the first embodiment, and the state of movement of 50 squids from the sucker tube 14 into the acrylic case 11 and the pressure-sensitive adhesive sheet The trapping situation to 12 was confirmed.

As a result, when a carbon dioxide generation source alone or a TPX film sealed with it was inserted, the squid did not move from the sucker tube 14 into the acrylic case 11 even after about 3 hours from the start of the experiment. . Further, after about 4 hours of observation, 20 carbonic acid gas sources alone and 25 squids sealed in a TPX film moved into the acrylic case 11, but the adhesive sheet 12 captured them. It was not collected and landed on the wall surface in the acrylic case 11. The remaining squid were dead in the fluke tube 14.
On the other hand, when a sealed carbon dioxide generation source was put in OTS-50, the squid was moving immediately after the start of the experiment, and all the squid were moved into the acrylic case 11 after 1 hour. Furthermore, 32 of them, 64%, were collected in the adhesive sheet 12.

From the above results, the following conclusions can be obtained.
In general, mosquitoes cease their activity when exposed to high concentrations of carbon dioxide due to anesthetic effects. Furthermore, if the anesthetic time is long, it will die. Therefore, when a carbon dioxide gas source or a sealed TPX film was inserted, the activity was stopped because it was exposed to a high concentration of carbon dioxide gas, but the carbon dioxide concentration decreased due to natural diffusion. The activity seems to have resumed at that time. On the other hand, when a sealed carbon dioxide generation source is put in OTS-50, carbon dioxide can be released at a concentration that does not give the anesthetic effect to the squid, so that the squid do not stop acting. Subsequently, it is presumed that the resin was attracted by carbon dioxide gas and moved into the acrylic case 11.
From the above results, it was experimentally confirmed that it is preferable to control the concentration of carbon dioxide gas by covering with the gas permeable film 2b because excessive release of carbon dioxide gas causes mosquito repellent behavior.

It is a perspective view which shows one Embodiment of the blood-sucking insect collector of this invention. It is a figure for demonstrating the internal structure of the collector of the blood-sucking insect, Comprising: It is the vertical sectional view seen by the AA arrow of FIG. It is a figure which shows the detail of the internal structure of the blood-sucking insect collector, and is the B section enlarged view of FIG. It is sectional drawing which shows the experimental apparatus for conducting a mosquito attraction experiment. It is the graph which shows the result of having calculated | required the effect of the coating film with respect to the amount of carbon dioxide generation from the carbon dioxide generation part which has ascorbic acid as the main ingredient, and a horizontal axis shows reaction elapsed time and a vertical axis shows carbon dioxide concentration ing.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Mosquito collection instrument (collector), 2 ... Carbon dioxide generation part (carbon dioxide generation source), 2a ... Drug, 2b ... Gas-permeable film (cover), 3 ... Case, 4 ... Adhesive pad (collection) Part), M ... Mosquito

Claims (7)

A carbon dioxide source that generates carbon dioxide,
A capture unit for capturing a blood-sucking insect attracted by the carbon dioxide released from the carbon dioxide source;
A cover that covers the carbon dioxide gas generation source and limits the amount of carbon dioxide gas generated from the carbon dioxide gas generation source;
A blood-sucking insect collector characterized by comprising:   The cover limits the amount of carbon dioxide released from the carbon dioxide generating source by adjusting a supply amount of a reaction medium necessary for the carbon dioxide generating source to generate the carbon dioxide. The blood-sucking insect collector according to claim 1.   The blood-sucking insect collector according to claim 1 or 2, wherein the cover is a multilayer film of polymethylpentene and polyolefin resin having gas permeability. The carbon dioxide generating source is a carbon dioxide generating agent containing ascorbic acids,
The amount of oxygen permeating through the cover is 25 ml at 1 atmosphere, and the amount of oxygen per 1 m ² permeation area is 24 hr, 3 ml / m ² · 24 hr · atm or more and 30000 ml
The blood-sucking insect collector according to any one of claims 1 to 3, wherein / m ² · 24 hr · atm or less. Amount of carbon dioxide gas passing through the said cover, 25 ° C., under the conditions of 1 atm, carbon dioxide gas transmission amount per permeation area of 1 m ² is at ^{24hr, 10ml / m 2 · 24hr} · atm or more and 110000ml / m ² The blood-sucking insect collector according to any one of claims 1 to 3, wherein the collector is 24 hr · atm or less. A carbon dioxide generating member that is attached to a blood sucking insect collector in a removable state and generates carbon dioxide for attracting the blood sucking insect,
A fixing frame for fixing the collector in a removable state;
A carbon dioxide generating source that is supported by the fixed frame and generates the carbon dioxide;
A cover comprising a multilayer film of polymethylpentene and polyolefin resin that covers the carbon dioxide gas generation source and has gas permeability;
A carbon dioxide generating member, comprising:   The carbon dioxide generating member according to claim 6, wherein the carbon dioxide generating source contains ascorbic acids.

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