Flying Pest Catcher

Abstract

To provide a flying insect pest capturing device which has excellent capturing performance of a flying insect pest.SOLUTION: A flying insect pest capturing device 1 comprises: a container 10 capable of housing an agent; and a lid 20 assembled to the container 10. The lid 20 demarcates a capturing chamber 2 between itself and the container 10 and has cylindrical invasion ports 25 each having a cylindrically extending shape so as to make the inside and outside of the capturing chamber 2 communicate with each other and allowing a flying insect pest to pass therethrough. Each of the cylindrical invasion ports 25 has an eccentric cylindrical structure in which an opening center P2 of an indoor opening 27 opening toward the inside of the capturing chamber 2 and an opening center P1 of an outdoor opening 26 opening toward the outside of the capturing chamber 2 are at positions different with respect to a horizontal direction orthogonal to a perpendicular direction in the installation attitude of the flying insect pest capturing device 1. Each of the cylindrical invasion ports 25 desirably has a tapered shape where the opening area of the outdoor opening 26 is smaller than that of the indoor opening 27.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a flying insect trap. [Background technology]

[0002] Various traps have been proposed for capturing flying pests such as small flies. For example, a conventional trap for flying pests has a container that contains a chemical solution or the like containing a component that attracts flying pests, and a cover that is attached to the opening of the container and has through-holes that allow flying pests to enter the container (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-171889 [Patent Document 2] Japanese Patent Application Publication No. 2018-102262 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, this type of trap captures flying pests by releasing attractants from a chemical solution or the like contained in a container through a through-hole in the cover, thereby attracting flying pests into the trap through the through-hole. The captured flying pests are then killed, for example, by an insecticidal component contained in the chemical solution or the like in the container. It is desirable to further improve the trapping performance of the trap in order to capture flying pests more efficiently.

[0005] An object of the present invention is to provide a flying pest trap that has excellent performance in capturing flying pests. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the flying pest trap according to the present invention is characterized by the following [1] to [5]. [1] A flying pest trap comprising a container capable of containing a chemical agent and a lid body attached to the container, The lid body is A capture chamber is defined between the container and the trapping chamber, and the trapping chamber has a cylindrical entry opening that extends cylindrically so as to communicate with the inside and outside of the trapping chamber and through which flying pests can pass, The cylindrical inlet is The trap has an eccentric cylinder structure in which the center of the indoor opening of the trapping chamber that opens toward the indoor side and the center of the outdoor opening of the trapping chamber that opens toward the outdoor side are at different positions in the horizontal direction perpendicular to the up-down direction in the installation position of the trap. It is a flying pest trap. [2] In the flying pest trap described in [1] above, The cylindrical inlet is The opening area of ​​the indoor opening is smaller than the opening area of ​​the outdoor opening, It is a flying pest trap. [3] In the flying pest trap described in [1] or [2] above, The cylindrical inlet is At least a part of the opening surface of the outdoor opening has a shape that expands along an oblique direction intersecting the up-down direction, It is a flying pest trap. [4] In the flying pest trap described in any one of [1] to [3] above, The lid body is Further, a through hole penetrating the lid body is provided at a position different from the cylindrical inlet. It is a flying pest trap. [5] In the flying pest trap described in [4] above, The plurality of cylindrical inlets and the plurality of through holes are arranged in the lid body so as to be alternately aligned. It is a flying pest trap.

[0007] According to the flying pest trap of the above configuration [1], a cylindrical entry opening, which extends cylindrically to connect the inside and outside of the trapping chamber and through which flying pests can pass, is provided in the cover. This cylindrical entry opening has an eccentric cylindrical structure, such that the center of the opening on the indoor side of the trapping chamber (the indoor opening) and the center of the opening on the outdoor side of the trapping chamber (the outdoor opening) are located at different positions in the horizontal direction perpendicular to the vertical direction when the trap is installed. Note that the "opening center" refers to the position of the geometric center of gravity of the opening surface. A cylindrical entry opening with an eccentric cylindrical structure is prone to creating large shadows with large differences in brightness on the inner surface of the tube when viewed from outside, due to factors such as bias in the reflection direction of external light on the inner surface of the tube. It is known that flying pests, such as small flies, have a strong tendency to orient themselves at boundaries of visual contrast, such as areas with large differences in brightness. This phenomenon is also known as the edge effect. The cylindrical entry opening of this configuration has a strong edge effect due to the large contrast between light and dark, which makes it more attractive to flying pests than the simple through-holes found in conventional traps. Therefore, this flying pest trap has excellent flying pest capture performance.

[0008] According to the flying pest trap of the configuration [2] above, the cylindrical entry opening has a tapered shape (e.g., a so-called tapered shape) in which the opening area of ​​the indoor opening is smaller than the opening area of ​​the outdoor opening. This small opening area of ​​the indoor opening prevents captured flying pests from escaping from the trapping chamber, while the large opening area of ​​the outdoor opening enhances the flying pest insect attraction effect. Therefore, the flying pest trap of this configuration can further improve the flying pest capture performance in terms of both preventing insects from escaping from the trapping chamber and improving the attraction effect to the trapping chamber.

[0009] According to the flying pest trap of the configuration [3] above, the cylindrical entry opening has a shape in which at least a portion of the opening surface of the outdoor opening widens along an oblique direction. This makes the cylindrical entry opening easily visible not only when viewed from above but also from the side, allowing flying pests to be attracted to the cylindrical entry opening from multiple directions. Therefore, the flying pest trap of this configuration can further improve its flying pest capture performance.

[0010] According to the flying pest trap of the configuration [4] above, a through-hole penetrating the lid is provided in addition to the cylindrical entry port. This makes it easier to release attractants, for example, when chemicals that emit attractants are stored in the trapping chamber through the through-hole. Therefore, the flying pest trap of this configuration can efficiently capture flying pests in the trapping chamber through the cylindrical entry port while efficiently releasing attractants from the trapping chamber through the through-hole.

[0011] According to the flying pest trap having the configuration of [5] above, the cylindrical entry openings and the through holes are arranged alternately on the lid, thereby achieving a good balance between the release of the attractant components and the capture of the attracted flying pests. [Effects of the Invention]

[0012] According to the present invention, a flying pest trap having excellent performance for capturing flying pests can be provided.

[0013] The present invention has been briefly described above. The details of the present invention will become clearer by reading the following detailed description of the invention (hereinafter referred to as "embodiments") with reference to the accompanying drawings. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view showing a flying pest insect trap according to an embodiment of the present invention. [Figure 2] FIG. 2 is a top view of the flying insect trap shown in FIG. [Figure 3]FIG. 3 is a cross-sectional view taken along line AA in FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line BB in FIG. [Figure 5] FIG. 5 is a cross-sectional view corresponding to FIG. 4 of a flying pest trap according to a comparative example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] <Embodiment> Hereinafter, a flying pest trap 1 (hereinafter simply referred to as "trap 1") according to an embodiment of the present invention will be described with reference to the drawings. Trap 1 is a device for trapping various flying pests. Examples of flying pests that trap 1 can trap include fruit flies such as Drosophila melanogaster, Drosophila oryzae, Drosophila nigricans, Drosophila giantis, and Drosophila japonica, as well as flea flies, fungus gnats, blow flies, blow flies, mosquitoes, and wasps. As shown in FIGS. 1, 3, and 4, trap 1 includes a container 10 capable of containing a pesticide and a lid 20 that can be attached to container 10. Attaching lid 20 to container 10 defines a trapping chamber 2 in which flying pests are trapped (see FIGS. 3 and 4).

[0016] For ease of explanation, the up-down direction in the installation position of trap 1 (up-down direction in Figures 1, 3, and 4) will be referred to as the "up-down direction," and the direction perpendicular to the up-down direction will be referred to as the "lateral direction." When trap 1 is installed on a horizontal surface, the up-down direction coincides with the "vertical direction," and the lateral direction coincides with the "horizontal direction." Each of the components that make up trap 1 will be explained below in order.

[0017] First, the container 10 will be described. The container 10 is a resin molded product. In this example, as shown in Figures 1, 3, and 4, the container 10 integrally comprises a substantially cylindrical side wall portion 11 extending in the vertical direction and a disk-shaped bottom wall portion 12 that closes the lower opening of the side wall portion 11, and is open upward. In this example, the side wall portion 11 has a tapered shape that narrows slightly downward relative to the complete cylindrical shape.

[0018] As shown in Fig. 4, engaging recesses 13 are formed on the outer surface (radially outer surface) of two opposing locations on the annular upper edge of side wall 11. Engaging protrusions 29 (see Fig. 4), which will be described later, of lid 20 are fitted into engaging recesses 13, thereby fixing lid 20 to container 10. A drug (not shown) is introduced into container 10 through an upper opening of container 10 and stored therein.

[0019] Next, the lid body 20 will be described. The lid body 20 is a resin molded product. In this example, as shown in FIGS. 1 to 4, the lid body 20 has a dome-shaped portion 20a whose upper surface (outer surface) protrudes upward and whose lower surface (inner surface) is recessed upward and has a generally dome-shaped circular shape when viewed from above. For ease of explanation, the radial direction and circumferential direction of the circle of the lid body 20 (dome-shaped portion 20a) when viewed from above will be simply referred to as the "radial direction" and the "circumferential direction," respectively. Each of the "radial direction" and the "circumferential direction" is also a horizontal direction perpendicular to the up-down direction.

[0020] The dome-shaped portion 20a of the lid body 20 has a shape that is rotationally symmetrical with respect to an axis extending in the up-down direction of the lid body 20. Specifically, as shown in Figures 1, 3, and 4, the dome-shaped portion 20a of the lid body 20 is composed of a substantially cylindrical protruding portion 21 that protrudes upward at a radial center portion, a first annular portion 22 that is continuous with the annular root portion (lower end portion) of the protruding portion 21 and extends radially outward, a second annular portion 23 that is continuous with the annular radially outer edge portion of the first annular portion 22 and extends radially outward, and a third annular portion 24 that is continuous with the annular radially outer edge portion of the second annular portion 23 and extends radially outward.

[0021] 3 and 4, protrusion 21 is disposed coaxially with the axis of lid body 20, and has a tapered shape that narrows slightly upward relative to a completely cylindrical shape and has a closed upper end. Protrusion 21 acts as a perch for flying pests such as fruit flies.

[0022] As shown in FIGS. 3 and 4 , the first annular portion 22 has a curved, plate-like shape over the entire circumferential area, with its upper surface (outer surface) concave downward and its lower surface (inner surface) protruding downward. The first annular portion 22 extends in an oblique direction intersecting the vertical direction, gradually shifting downward as it extends radially outward. The radially outer edge of the first annular portion 22 faces radially outward (horizontally). The second annular portion 23 has a flat plate-like shape over the entire area, extending in the horizontal direction (a direction perpendicular to the vertical direction). The third annular portion 24 has a curved, plate-like shape over the entire circumferential area, with its upper surface (outer surface) convex upward and its lower surface (inner surface) concave upward. The third annular portion 24 extends in an oblique direction intersecting the vertical direction, gradually shifting downward as it extends radially outward. The radially outer edge of the third annular portion 24 faces downward. The radially outer edge of the third annular portion 24 also serves as the radially outer edge of the dome-shaped portion 20a.

[0023] 1 and 2, a plurality (six in this example) of identical cylindrical inlets 25 and a plurality (six in this example) of identical through-holes 28 are provided in the dome-shaped portion 20a of the lid body 20 at equal intervals in the circumferential direction (at intervals of 30 degrees in this example) and alternately arranged in the circumferential direction. The cylindrical inlets 25 and the through-holes 28 will be described below in order.

[0024] First, we will explain the cylindrical entry opening 25. As shown in Figure 3, the cylindrical entry opening 25 has a cylindrical shape that protrudes downward (inside the capture chamber 2) from the underside (inner surface) of the dome-shaped portion 20a and communicates with the dome-shaped portion 20a in the thickness direction (inside and outside of the capture chamber 2). The cylindrical entry opening 25 mainly serves to guide flying pests located outside the capture chamber 2 into the capture chamber 2.

[0025] The exterior opening 26 (i.e., the opening formed in the dome-shaped portion 20a; see FIG. 3) of the cylindrical entry port 25 that opens toward the outside of the capture chamber 2 has a radially extending elongated hole shape when viewed from above, as shown in FIG. 2. In this example, when the exterior opening 26 is viewed from above, the circumferential dimension of the radially outer end is larger than the circumferential dimension of the radially inner end, and the circumferential dimension is greatest at approximately the radial center.

[0026] 3, the exterior opening 26 extends radially from the radially inner edge of the second annular portion 23 (i.e., the boundary between the first annular portion 22 and the second annular portion 23) to a radially intermediate position close to the radially outer end of the third annular portion 24. Therefore, in the radially inner region (the region corresponding to the second annular portion 23), the exterior opening 26 spreads in a horizontal direction perpendicular to the up-down direction, and in the outer region (the region corresponding to the third annular portion 24) radially outward of the inner region, the exterior opening 26 spreads in an oblique direction intersecting the up-down direction so as to move downward as it progresses radially outward.

[0027] In this example, the indoor opening 27 of the tubular entry opening 25 that opens toward the interior of the capture chamber 2 (i.e., the opening at the protruding end (lower end) of the tubular entry opening 25, see Figure 3) is circular when viewed from above, as shown in Figure 2. The opening area of ​​the indoor opening 27 is smaller than the opening area of ​​the outdoor opening 26. Therefore, the tubular entry opening 25 has a tapered shape that narrows toward the bottom (the interior of the capture chamber 2). The opening area of ​​the indoor opening 27 is large enough to allow flying pests to pass through.

[0028] The side surface (cylindrical inner surface) of the cylindrical intrusion opening 25 has a cylindrical shape obtained by continuing a line segment connecting the edges of the cylindrical intrusion opening 25 at the same circumferential position of the outdoor opening 26 and the indoor opening 27 in a straight line over the entire circumferential area of ​​the cylindrical intrusion opening 25. Furthermore, the side surface (cylindrical inner surface) of the cylindrical intrusion opening 25 has a cylindrical shape in which the shape of the side surface (cylindrical inner surface) is asymmetric with respect to the cylindrical axis connecting the opening center P1 of the outdoor opening 26 and the opening center P2 of the indoor opening 27. In the present invention, the "opening center" refers to the position of the geometric center of gravity of the opening surface.

[0029] As shown in FIG. 2, when viewed from above, the opening center P1 of the outdoor opening 26 (see FIG. 2) and the opening center P2 of the indoor opening 27 (see FIG. 2) are at different positions in the radial direction (horizontal direction). Specifically, in this example, as shown in FIG. 2, the opening center P2 of the indoor opening 27 is located radially inward from the opening center P1 of the outdoor opening 26. For this reason, as shown in FIG. 3, the cylindrical intrusion opening 25 has an eccentric cylindrical structure, and the angle of inclination of the radially outermost point on the side surface (cylindrical inner surface) of the cylindrical intrusion opening 25 relative to the vertical direction is greater than the angle of inclination of the radially innermost point on the side surface (cylindrical inner surface) of the cylindrical intrusion opening 25 relative to the vertical direction. The cylindrical intrusion opening 25 has been described above.

[0030] From the viewpoint of enhancing the edge effect due to the shadows generated on the inner surface of the cylinder, which will be described later, the cylindrical inlet 25 preferably has a cylindrical length that is at least three times the thickness of the thin plate material that constitutes the lid body 20 (particularly the dome-shaped portion 20a), and more preferably at least ten times the thickness. That is, the ratio of the cylindrical inlet 25's cylindrical length to the plate thickness of the thin plate material that constitutes the lid body 20 (= cylindrical length / plate thickness) is preferably at least 3, and more preferably at least 10. The "cylindrical length" refers to the length of the line segment connecting the opening center P1 of the exterior opening 26 and the opening center P2 of the interior opening 27.

[0031] Furthermore, from the same viewpoint as above, it is preferable that the cylindrical inlet 25 has a shape in which the ratio of the cylindrical length to the opening area of ​​the outdoor opening 26 (= cylindrical length / opening area of ​​the outdoor opening 26) is 0.1 or more and 3.0 or less, and it is even more preferable that the ratio is 0.3 or more and 2.0 or less.

[0032] Furthermore, from the same viewpoint as above, it is preferable that the cylindrical inlet 25 has a shape such that the ratio of the opening area of ​​the outdoor opening 26 to the opening area of ​​the indoor opening 27 (= opening area of ​​the outdoor opening 26 / opening area of ​​the indoor opening 27) is 1.2 or more and 30 or less, and it is even more preferable that the ratio is 5 or more and 20 or less.

[0033] Next, we will explain the through-hole 28. The through-hole 28 communicates with the dome-shaped portion 20a in the thickness direction (the inside and outside of the capture chamber 2). The through-hole 28 mainly serves to release the attractant component for flying pests contained in the chemical agent stored in the container 10 (i.e., the capture chamber 2) to the outside of the capture chamber 2.

[0034] As shown in Fig. 2, the through hole 28 has a radially extending elongated hole shape when viewed from above. In this example, when viewed from above, the circumferential dimension of the radially outer end of the through hole 28 is larger than the circumferential dimension of the radially inner end, and the circumferential dimension gradually increases radially outward. The opening area of ​​the through hole 28 is larger than the opening area of ​​the interior opening 27.

[0035] As shown in Fig. 4, the through hole 28 extends radially from the radially inner edge of the first annular portion 22 (i.e., the boundary between the protruding portion 21 and the first annular portion 22) to approximately the radial center of the third annular portion 24. Therefore, the radially inner end of the through hole 28 is located radially inward from the radially inner end of the outdoor opening 26 of the cylindrical intrusion port 25, and the radially outer end of the through hole 28 is also located radially inward from the radially outer end of the outdoor opening 26 of the cylindrical intrusion port 25 (see Fig. 2). The through hole 28 has been described above.

[0036] As shown in Fig. 4, engaging protrusions 29 are formed on two mutually opposing inner surfaces (radially inner surfaces) of the annular radially outer edge of the dome-shaped portion 20a of the lid 20, respectively, corresponding to the engaging recesses 13 of the container 10. Due to the provision of the engaging protrusions 29, a vertically penetrating opening 31 for die removal is formed above each engaging protrusion 29 in the dome-shaped portion 20a. In this example, as shown in Fig. 2, the pair of engaging protrusions 29 and the pair of openings 31 are provided at circumferential positions corresponding to the pair of through-holes 28 arranged in a row radially when viewed from above. The components that make up the trap 1 have been described above.

[0037] The chemical agent contained in the container 10 may be, for example, a granular chemical agent obtained by impregnating an absorbent polymer with a solution containing an attractant component that attracts flying pests. The impregnated body impregnated with the solution containing the attractant component is not limited to an absorbent polymer, but may be a nonwoven fabric, paper, or the like. Furthermore, the form of the chemical agent is not limited to a granular form, but may be in various forms such as a liquid, gel, jelly, or solid form.

[0038] Examples of attractant ingredients that can be used include Shaoxing wine, beer, wine, acetoin, black vinegar, red vinegar, vinegar, various fruit extracts, fermented vegetables and fruits, miso, yeast, honey, liquid sugar, brown sugar, sugar, various plant-based foods, and various animal-based foods.

[0039] Furthermore, the agent may contain an insecticidal component that kills flying pests. Examples of the insecticidal component include pyrethroid compounds such as pyrethrum extract, natural pyrethrins, prallethrin, imiprothrin, phthalthrin, allethrin, transfluthrin, resmethrin, fenothrin, cyphenothrin, permethrin, cypermethrin, etofenprox, cyfluthrin, deltamethrin, bifenthrin, fenvalerate, fenpropathrin, empenthrin, silafluofen, metofluthrin, and profluthrin; fenitrothion, diazinon, malathion, pyridaphenthion, prothiophos; Organophosphorus compounds such as phoxim, chlorpyrifos, and dichlorvos; carbamate compounds such as carbaryl, propoxur, methomyl, and thiodicarb; oxadiazole compounds such as metoxadiazone; phenylpyrazole compounds such as fipronil; sulfonamide compounds such as amidoflumet; nicotinoid compounds such as dinotefuran and imidacloprid; insect growth regulator compounds such as methoprene, hydroprene, and pyriproxyfen; and insecticidal essential oils such as orange oil, peppermint oil, and benzyl alcohol.

[0040] Furthermore, the agent may contain viscous components such as polybutene, natural rubber, guar gum, xanthan, starch, and sugars to impart high viscosity to the surface of the agent, thereby causing flying pests to stick to the agent and physically restricting their movement within the trap 1. In addition, the agent may contain various auxiliary ingredients such as an agent to prevent accidental ingestion, a preservative, a pH adjuster, a stabilizer, a coloring agent, and a fragrance.

[0041] The trap 1 is completed by storing the above-mentioned drug inside the container 10 and assembling the lid 20 to the container 10. The assembly of the lid 20 to the container 10 is achieved by fitting a pair of engaging protrusions 29 of the lid 20 into a pair of engaging recesses 13 of the container 10. The completed trap 1 is installed in a predetermined installation location with its up-down direction aligned with the vertical direction.

[0042] The attractant components for flying pests contained in the agent located inside the capture chamber 2 are released to the outside of the capture chamber 2 through the plurality of through-holes 28. Note that, due to the small opening area of ​​the interior opening 27, the amount of attractant components released to the outside of the capture chamber 2 through the cylindrical entry opening 25 is smaller than the amount of attractant components released through the through-holes 28.

[0043] Flying pests located outside the capture chamber 2 are attracted by the released attractant and approach the lid 20. At this time, due to the eccentric cylindrical structure of the cylindrical entry opening 25 of the lid 20 as described above, the flying pests are particularly strongly attracted to the inner cylindrical surface of the cylindrical entry opening 25. This point will be explained in more detail below.

[0044] In this example, because the cylindrical entry opening 25 has the above-described eccentric cylindrical structure, external light is likely to be reflected in a biased direction on the inner surface of the cylinder. Therefore, when the cylindrical entry opening 25 is viewed from outside the trapping chamber 2, the brightness of different locations on the inner surface of the cylinder increases, and shadows with large differences in brightness are likely to appear on the inner surface of the cylinder. It is known that flying pests such as fruit flies have a strong tendency to orient themselves at boundaries of visual contrast, such as areas with large differences in brightness (the so-called edge effect). The cylindrical entry opening 25 exerts a strong edge effect due to the large differences in brightness, thereby attracting flying pests more strongly than the simple through-holes provided in conventional traps.

[0045] Therefore, flying pests that are attracted by the attractant component and approach the lid body 20 are likely to land on the inner surface of the cylindrical entry opening 25 due to the edge effect caused by the shadow created at the cylindrical entry opening 25. Flying pests that land on the inner surface of the cylindrical entry opening 25 are further attracted by the attractant component, and travel along the inner surface of the cylindrical entry opening 25 and enter the interior of the capture chamber 2 through the interior opening 27, whereby they are captured by the trap 1. Then, flying pests that have entered the interior of the capture chamber 2 are killed by the insecticidal component contained in the chemical solution, or drown in the chemical solution, etc.

[0046] <Evaluation test> Next, a test conducted to evaluate the performance of trap 1 in capturing flying pests and the results thereof will be described.

[0047] As an example, a trap 1 (Example 1) having the configuration shown in Figures 1 to 4 was prepared. As described above with reference to Figures 1 to 4, the cylindrical inlet 25 of trap 1 has an eccentric cylindrical structure and a tapered shape. More specifically, as shown in Table 1 described later, the cylindrical inlet 25 of trap 1 has a shape in which the ratio of the cylindrical length of cylindrical inlet 25 to the plate thickness of the thin plate material constituting lid body 20 is 14, the ratio of the cylindrical length of cylindrical inlet 25 to the opening area of ​​outdoor opening 26 is 1.6, and the ratio of the opening area of ​​outdoor opening 26 to the opening area of ​​indoor opening 27 is 10.6.

[0048] On the other hand, as a comparative example, a trap 9 (Comparative Example 1) was prepared, in which a cover 40 was provided with an intrusion opening 45 having a cylindrical structure (straight cylindrical structure) with a uniform cross-sectional area in the axial direction without an eccentric cylindrical structure, and an opening 48 similar to the through-hole 28, as shown in FIG. 5. More specifically, as shown in Table 1 described later, the intrusion opening 45 of the trap 9 has a shape in which the ratio of the cylindrical length of the intrusion opening 45 to the plate thickness of the thin plate material constituting the cover 40 is 14, the ratio of the cylindrical length of the intrusion opening 45 to the opening area of ​​the outdoor opening 46 is 16.7, and the ratio of the opening area of ​​the outdoor opening 46 to the opening area of ​​the indoor opening 47 is 1. The number of intrusion openings 45 and the number of openings 48 in the trap 9 of Comparative Example 1 were each six. The opening area of ​​the indoor opening 47 of the intrusion opening 45 in the trap 9 of Comparative Example 1 is approximately equal to the opening area of ​​the indoor opening 27 of the cylindrical intrusion opening 25 in the trap 1. The total opening area of ​​the openings 48 in the trap 9 is approximately equal to the total opening area of ​​the through-holes 28 in the trap 1.

[0049] The lid 40 used in the trap 9 of Comparative Example 1 has a dome-shaped portion 40a, a protruding portion 41, a first annular portion 42, a second annular portion 43, a third annular portion 44, an engaging protrusion 49, and an opening 51, which are similar in structure to the trap 1, except that the shape of the entry port 45 is different from that of the trap 1 of Example 1. Furthermore, the trap 9 of Comparative Example 1 uses the same container 10 as the trap 1 of Example 1.

[0050] Furthermore, as Reference Example 1, a commercially available small fly trap ("Kobae Ga Hoihoi" (registered trademark) manufactured by Earth Chemical Co., Ltd.) was prepared, which is a trap that does not have a cylindrical entry port 25, but only has an opening similar to the through-hole 28 provided in the lid 20. The total opening area of ​​the openings in the trap of Reference Example 1 is approximately equal to the total opening area of ​​the indoor opening 27 of the cylindrical entry port 25 in trap 1 and the opening area of ​​the through-hole 28.

[0051] Traps 1 of Example 1 were placed at two diagonally opposite corners of a test room (a Pete Grady chamber, approximately 2.5 tatami mats in size, room temperature 25±2°C), and traps of Reference Example 1 were placed at the other two corners of the test room. The attractant (Shaoxing wine and black vinegar) and insecticide (dinotefuran) used in Earth Chemical's "Kobae ga Hoihoi" (same as above) were placed in each of the traps of Example 1 and Reference Example 1. Adult Drosophila melanogaster (approximately 100 individuals) were released into the test room as test insects. After three hours, the number of test insects captured in each trap was visually confirmed. The total number of traps captured by the two traps of Example 1 placed in each location was defined as the number of traps captured by Trap 1 of Example 1, and the total number of traps captured by the two traps of Reference Example 1 placed in each location was defined as the number of traps captured by Trap 1 of Example 1. The ratio of the number of traps captured by trap 1 of Example 1 to the number of traps captured by trap of Reference Example 1 was calculated as the trapping capacity ratio (first time). Furthermore, the trap 1 of Example 1 and the trap of Reference Example 1 were swapped in position, and the same test was conducted to calculate the trapping capacity ratio (second time). The average value of the trapping capacity ratios (first time, second time) obtained in these two tests was calculated as the trapping capacity ratio for evaluation.

[0052] The trap 9 of Comparative Example 1 was also subjected to the same test as above, and a trapping capacity ratio for evaluation purposes relative to the trap of Reference Example 1 was calculated.

[0053] The results of the above tests are shown in Table 1 below.

[0054] [Table 1]

[0055] As can be seen from a comparison between Example 1 and Reference Example 1 shown in Table 1, it has become clear that trap 1 (Example 1) having a cylindrical entry port with an eccentric cylindrical structure has a superior capture ability compared to the trap of Reference Example 1 which does not have such a cylindrical entry port (i.e., the commercially available "Fly Trap" manufactured by Earth Chemical Co., Ltd. (ibid.)). Furthermore, as can be seen from a comparison between Example 1 and Comparative Example 1, it has become clear that trap 1 (Example 1) having a cylindrical entry port with an eccentric cylindrical structure has a superior capture ability compared to trap 9 of Comparative Example 1 which has a simple straight cylindrical structure.

[0056] The trap 1 of Example 1 has six cylindrical entry ports 25, while the trap 9 of Comparative Example 1 has six entry ports 45. Although not shown in Table 1, experiments conducted by the inventors have confirmed that even if the number of cylindrical entry ports 25 in Example 1 is increased or decreased compared to six, a capture capacity equivalent to that of Example 1 can be obtained. The same is true for the trap 9 of Comparative Example 1. In other words, even if the number of cylindrical entry ports is increased or decreased compared to six, it has been confirmed that there is no difference in the conclusion (i.e., the superiority of cylindrical entry ports having an eccentric cylindrical structure) that emerged from the comparison of Example 1, Comparative Example 1, and Reference Example 1, when compared under conditions where the number of cylindrical entry ports is the same.

[0057] <Actions and Effects> As described above, according to the trap 1 of this embodiment, a cylindrical entry opening 25, which has a cylindrical shape that connects the inside and outside of the trapping chamber 2 and through which flying pests can pass, is provided in the cover 20. This cylindrical entry opening 25 has an eccentric cylindrical structure, such that the center P2 of the opening on the indoor side of the trapping chamber 2 (indoor opening 27) and the center P1 of the opening on the outdoor side of the trapping chamber 2 (outdoor opening 26) are at different positions in the horizontal (radial) direction of the trap 1. This causes a bias in the reflection direction of external light on the inner surface of the cylinder, resulting in large differences in brightness between different locations on the inner surface of the cylinder when viewed from outside, easily creating large shadows with large differences in brightness. The cylindrical entry opening 25 exerts a strong edge effect due to the large shadows with large differences in brightness, thereby attracting flying pests more strongly than the simple through-holes provided in conventional traps. Therefore, the trap 1 of this embodiment has excellent flying pest capture performance.

[0058] Furthermore, in trap 1 according to this embodiment, cylindrical entry opening 25 has a tapered shape (e.g., a so-called tapered shape) in which the opening area of ​​indoor opening 27 is smaller than the opening area of ​​outdoor opening 26. As a result, the small opening area of ​​indoor opening 27 can prevent captured flying pests from escaping from trapping chamber 2, and the large opening area of ​​outdoor opening 26 can also enhance the flying pest attraction effect. Therefore, trap 1 according to this embodiment can further improve the flying pest capture performance in terms of both preventing insects from escaping from trapping chamber 2 and improving the attraction effect to trapping chamber 2.

[0059] Furthermore, in trap 1 according to this embodiment, cylindrical entry opening 25 has a shape in which part of the opening surface of outdoor opening 26 (specifically, the radially outer region corresponding to third annular portion 24) widens in an oblique direction. This makes cylindrical entry opening 25 easier to see not only when viewed from above trap 1 but also when viewed from the side, and flying pests can be attracted to cylindrical entry opening 25 from multiple directions. Therefore, trap 1 according to this embodiment can further improve its ability to capture flying pests.

[0060] Furthermore, according to the trap 1 of this embodiment, a through-hole 28 that penetrates the lid 20 is provided in addition to the cylindrical entry opening 25. This makes it easier to release the attractant to the outside of the trapping chamber 2 through the through-hole 28 when a chemical or the like that emits an attractant is stored in the trapping chamber 2. Therefore, the trap 1 of this embodiment can efficiently capture flying pests into the trapping chamber through the cylindrical entry opening 25 while efficiently releasing the attractant from the trapping chamber 2 through the through-hole 28.

[0061] Furthermore, in the trap 1 according to this embodiment, the plurality of cylindrical entry openings 25 and the plurality of through-holes 28 are arranged alternately on the lid 20. This allows a good balance between the release of the attractant and the capture of the attracted flying pest insects.

[0062] <Other forms> It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiments, and modifications, improvements, etc. are possible as appropriate. In addition, the material, shape, dimensions, number, location, etc. of each component in the above-described embodiments are arbitrary and not limited as long as the present invention can be achieved.

[0063] In the above embodiment, the cylindrical intrusion opening 25 has an eccentric cylindrical structure and a tapered shape in which the opening area of ​​the indoor opening 27 is smaller than the opening area of ​​the outdoor opening 26. In contrast, as long as the cylindrical intrusion opening 25 has an eccentric cylindrical structure, the opening area of ​​the indoor opening 27 may be the same as or larger than the opening area of ​​the outdoor opening 26.

[0064] Furthermore, in the above embodiment, the cylindrical intrusion opening 25 has a cylindrical inner surface shape in which the opening area gradually decreases continuously from the outdoor opening 26 toward the indoor opening 27. In contrast, the cylindrical intrusion opening 25 may have a cylindrical inner surface shape in which the opening area decreases discontinuously (in other words, stepped) by connecting multiple cylinders with different opening areas.

[0065] Furthermore, in the above embodiment, the exterior opening 26 extends in a horizontal direction perpendicular to the vertical direction in a radially inner region (region corresponding to the second annular portion 23), and extends in an oblique direction intersecting the vertical direction so as to move downward as it moves radially outward in an outer region (region corresponding to the third annular portion 24) radially outward from the inner region. In contrast, the exterior opening 26 may extend in a horizontal direction perpendicular to the vertical direction over the entire region.

[0066] Furthermore, in the above embodiment, the lid 20 is formed with the through-hole 28 in addition to the cylindrical entry port 25. However, the through-hole 28 does not necessarily have to be formed.

[0067] Here, the features of the embodiment of the trap 1 according to the present invention described above will be briefly summarized and listed below in [1] to [5]. [1] A flying pest trap (1) comprising a container (10) capable of containing a chemical agent and a lid (20) attached to the container (10), The cover (20) is A trapping chamber (2) is defined between the trapping chamber (2) and the container (10), and the trapping chamber (2) has a cylindrical entry opening (25) extending in a cylindrical shape so as to communicate between the inside and outside of the trapping chamber (2) and through which flying pests can pass, The cylindrical inlet (25) The trap has an eccentric cylinder structure in which the opening center (P2) of the indoor opening (27) of the trapping chamber (2) facing the indoors and the opening center (P1) of the outdoor opening (26) of the trapping chamber (2) facing the outdoors are at different positions in the horizontal direction perpendicular to the up-down direction in the installation posture of the flying pest trap (1). Flying pest trap (1). [2] In the flying pest trap (1) described in [1] above, The cylindrical inlet (25) The opening area of ​​the indoor opening (27) is smaller than the opening area of ​​the outdoor opening (26). Flying pest trap (1). [3] In the flying pest trap (1) described in [1] or [2] above, The cylindrical inlet (25) At least a part of the opening surface of the outdoor opening (26) has a shape that expands along an oblique direction intersecting the vertical direction. Flying pest trap (1). [4] In the flying pest trap (1) described in any one of [1] to [3] above, The cover (20) is The cover (20) further includes a through-hole (28) that penetrates the cover (20) at a position different from the cylindrical inlet (25). Flying pest trap (1). [5] In the flying pest trap (1) described in [4] above, The plurality of cylindrical inlets (25) and the plurality of through holes (28) are arranged in the lid body (20) so as to be alternately arranged. Flying pest trap (1). [Explanation of symbols]

[0068] 1 Flying pest trap 10 containers 20 Lid 25 Cylindrical entrance 26 Outdoor opening 27 Interior opening 28 Through Hole

Claims

1. A flying pest trap comprising a container capable of containing a chemical agent and a lid body attached to the container, The lid body is A trapping chamber is defined between the trapping chamber and the container, and the trapping chamber has a cylindrical entry opening that extends cylindrically so as to communicate with the inside and outside of the trapping chamber and through which flying pests can pass, The cylindrical inlet is The trap has an eccentric cylinder structure in which the center of the indoor opening that opens toward the inside of the trapping chamber and the center of the outdoor opening that opens toward the outside of the trapping chamber are at different positions in the horizontal direction perpendicular to the up-down direction in the installation posture of the flying pest trap, and the outdoor opening is configured to be continuous with the outer surface of the lid without any steps. Flying pest trap.

2. The flying insect trap according to claim 1, The cylindrical inlet is The opening area of ​​the indoor opening is smaller than the opening area of ​​the outdoor opening, Flying pest trap.

3. The flying pest trap according to claim 1 or 2, The cylindrical inlet is At least a part of the opening surface of the outdoor opening has a shape that expands along an oblique direction intersecting the up-down direction, Flying pest trap.

4. The flying pest trap according to any one of claims 1 to 3, The lid body is Further, a through hole penetrating the lid body is provided at a position different from the cylindrical inlet. Flying pest trap.

5. The flying insect pest trap according to claim 4, The plurality of cylindrical inlets and the plurality of through holes are arranged in the lid body so as to be alternately aligned. Flying pest trap.

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