Walking insect trapping device and method for controlling walking insects

Abstract

To provide a crawling insect trapping device that can efficiently capture crawling insects. [Solution] A walking insect trapping device having a base material having an outer surface on which walking insects can walk, wherein the base material is made of a self-supporting plate-like member and has a non-adhesive attracting area and an adhesive trapping area, the attracting area being dark in color and the trapping area being light in color.

Description

Technical Field

[0001] The present invention relates to the control of walking pests, and particularly to a trapping device for walking pests such as spider mites.

Background Art

[0002] In recent years, damage caused by agricultural pests that have developed resistance to existing chemical pesticides has been expanding. For example, damage to crops by aphids, stink bugs, aphids, scale insects as hemipteran pests, thrips, and further by mite pests such as spider mites, eriophyid mites, false spider mites, and dust mites has been expanding.

[0003] Therefore, a control method that does not promote drug resistance is required. As a control method other than chemical pesticides, particularly for spider mites, the use of biopesticides using natural enemies such as Phytoseiulus persimilis, Typhlodromips montdorensis, and Swirskii mite is becoming popular.

[0004] Also, as another trapping method, methods and devices for physically trapping by adhesion have been proposed. For example, a pest trap has been proposed that includes a corrugated plate-like body processed into a corrugated shape, and an adhesive body having an adhesive surface and attached to the corrugated convex portion of the corrugated plate-like body with the adhesive surface facing the corrugated plate-like body side, and a pest entry portion is provided between the adhesive surface of the adhesive body and the corrugated convex portion of the corrugated plate-like body. (For example, Patent Document 1). Also, a trapping device having a pointed portion of a specific shape covered with an adhesive has been proposed. (For example, Patent Document 2).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] Here, the insect trapping device described in Patent Document 1 above captures insects by having their legs adhere to an adhesive surface. However, because the contact area between the insect's legs and the adhesive surface is small, there is a problem that it is difficult to capture insects if the adhesive force is insufficient. Patent Document 2 above solves this problem by capturing the insect's body, especially its abdomen, with an adhesive pointed part. However, there was a problem in that a method was needed to guide crawling insects to the adhesive pointed part in order to capture them more efficiently.

[0007] Therefore, the present invention has been made in view of the above-mentioned problems, and aims to provide a crawling insect trapping device that can efficiently capture crawling insects such as spider mites. [Means for solving the problem]

[0008] The present invention provides the following embodiments. [Aspect 1] A crawling insect trapping device having a base material with an outer surface on which crawling insects can walk, The aforementioned base material consists of a self-supporting plate-like member, It has an attracting area that is not sticky and a trapping area that is sticky, A walking insect trapping device, wherein the attracting area is dark in color and the trapping area is light in color.

[0009] [Aspect 2] The walking insect trapping device according to aspect 1, wherein, when installed, the attracting area is located at the bottom of the walking insect trapping device, and the trapping area is located above the attracting area.

[0010] [Aspect 3] A walking insect trapping device according to aspect 1 or 2, wherein the difference in brightness (L* value) between the attracting area and the trapping area is 40 or more.

[0011] [Aspect 4] A walking insect trapping device according to any of aspects 1 to 3, wherein the attracting area and the trapping area have adjacent parts to each other.

[0012] [Aspect 5] The walking pest capture device according to any one of Aspects 1 to 4, wherein the capture area has an end portion or a pointed portion.

[0013] [Aspect 6] The walking pest capture device according to any one of Aspects 1 to 5, which has a tapered portion at the lower part for piercing and fixing to the ground.

[0014] [Aspect 7] The walking pest capture device according to any one of Aspects 1 to 6, wherein the walking pest is a mite pest.

[0015] [Aspect 8] A method for controlling walking pests, which includes installing the walking pest capture device according to any one of Aspects 1 to 7 at a place where walking pests are captured.

Advantages of the Invention

[0016] According to the present invention, a light-colored capture area with adhesion on the upper part and a dark-colored attraction area without adhesion on the lower part can be installed on the ground. Walking pests walking on the ground are attracted to the dark color in the lower part and have the habit of climbing upward using this as a foothold. In addition, walking pests have the habit of preferring visible light and move to the light-colored capture area and are captured.

Brief Description of the Drawings

[0017] [Figure 1] It is a schematic diagram showing the configuration of a walking pest capture device which is an embodiment of the present invention. [Figure 2] It is a perspective view showing the configuration of a box used in the mite capture test in the example. [Figure 3] It is a photograph showing the configuration of a walking pest capture device which is an embodiment of the present invention. [Figure 4] It is a photograph showing the state where the walking pest capture device is installed on a cultivation pot. [Figure 5] It is a photograph showing the configuration of a walking pest capture device which is another embodiment of the present invention. [Figure 6] It is a photograph showing the state where the walking pest capture device of the present invention is installed above a plant body.

Modes for Carrying Out the Invention

[0018] Hereinafter, embodiments of the present invention will be described in detail. However, the scope of the present invention is not limited to the embodiments described herein, and various modifications can be made without departing from the spirit of the present invention. Further, when a plurality of upper limit values and lower limit values are described for a specific parameter, any upper limit value and lower limit value can be combined to form a suitable numerical range.

[0019] <Walking pest> In the present invention, a walking pest is an agricultural pest that damages crops such as grains, vegetables, and fruits cultivated in fields, etc., by eating them or sucking their juice, and indicates a species that moves by walking or crawling. The adults of flying pests are not targeted. Also, even flying pests in their juvenile stage and capable of moving only by walking are included.

[0020] Examples of agricultural pests include aphids, stink bugs, thrips, ladybugs, thistle bugs, pests of the order Thysanoptera, mite pests of the families Phytoseiidae, Tarsonemidae, Acaridae, Tetranychidae, etc. of the order Acarina, and larvae of butterflies and moths.

[0021] <Substrate> The walking pest capture device of the present invention (hereinafter sometimes simply referred to as "capture device") has an outer surface on which walking pests such as mites that move by walking can walk for the purpose of capturing walking pests.

[0022] The capture device of the present invention generally has a substrate. The substrate is a member that supports a capture area and an attraction area. Walking pests can walk on the outer surface of the substrate. The shape of the substrate is preferably one with a certain width and self - standing property so that walking pests are likely to collide with it when walking on the ground, and plate - shaped, flat - shaped or sheet - shaped ones are preferred. The substrate may be formed by combining a plurality of materials. The walking pest capture device of the present invention may be composed of the above - mentioned substrate.

[0023] Since the trapping device of the present invention is used in seedling pots that are repeatedly watered and in outdoor fields, the base material needs to be water-resistant and weather-resistant. The base material may be a resin molded body or a resin sheet, or it may be water-resistant paper with a resin coating on the surface of the paper. Furthermore, its dimensions can be appropriately adjusted so as not to interfere with the growth of nearby cultivated plants when installed.

[0024] <Capture area> The trapping device of the present invention has an adhesive trapping area that adheres to and fixes crawling insects when they walk over it. The trapping area can be formed, for example, on the outer surface of a base material.

[0025] In one form, the capture area has an end that is narrowed by being sandwiched between the front and back surfaces, or a tapered, pointed part. When a crawling insect steps over the end or pointed part, these parts adhere to the insect's body, securely fixing it in place.

[0026] The width of the end portion sandwiched between the front and back surfaces (thickness in the case of plate-like or sheet-like materials) is preferably 0.2 to 1.0 mm. The radius of curvature of the tip of the pointed portion is preferably 0.001 to 1.0 mm, preferably 0.01 to 0.5 mm, and more preferably 0.1 to 0.3 mm. When the dimensions of the end portion or pointed portion are within the above range, these parts are more likely to adhere to the body of crawling insects when they step over them, thereby improving the efficiency of capturing crawling insects. Details of the end portion and pointed portion are herein by reference to the description in Patent Document 2.

[0027] Specifically, the capture area can have a shape with multiple ends, as shown in Figure 3, or a shape with many cone-shaped points, as shown in Figure 5.

[0028] Since crawling insects feed on sunny parts of plants, such as leaves, they have a habit of moving to bright areas when preying. Therefore, the capture area should have a light color. The lightness L* of the capture area should preferably be 40 or more, more preferably 60 or more, and even more preferably 80 or more, compared to the dark color of the attracting area. If the difference in lightness L* from the attracting area is less than 40, it will be difficult to reflect the tendency of spider mites to move from dark areas to light areas based on their preference for visible light. The saturation of the color of the capture area is not particularly limited.

[0029] Furthermore, regarding the capture area, especially for spider mites, it is preferable to have low UV reflection efficiency, as spider mites dislike ultraviolet light.

[0030] Furthermore, leaves, sap, and nectar, which serve as food for crawling insects, often appear on the upper parts of plants, and crawling insects have a habit of climbing against gravity when preying. Therefore, it is preferable to position the capture area above the attracting area when the trap is installed. For example, the capture area can be positioned adjacent to the attracting area and above it.

[0031] <Adhesive> A sticky trapping area can be created by forming a layer of adhesive on a substrate. The type of adhesive is not particularly limited as long as it exhibits appropriate adhesive strength for trapping crawling insects. For example, trapping areas can be formed using adhesives such as acrylic, rubber, SIS block, silicone, and polyurethane. These adhesives may be used individually or in combination of two or more types.

[0032] Double-sided adhesive tape can also be used as the adhesive layer. In this case, the double-sided adhesive tape consists of a sheet-like base material in the center and adhesive coated on both sides. The base material in the center is not particularly limited, but a thin sheet-like material such as paper or film can be used.

[0033] From the perspective of reliably capturing crawling insects, a permanent adhesive type that adheres to the substrate semi-permanently after application is preferred. Repositionable adhesive sheets intended to be removed after a certain period of application are undesirable because they have relatively poor adhesive properties.

[0034] Furthermore, considering that it will be installed outdoors and subjected to repeated watering, a hot-melt type adhesive that recovers its adhesive strength once it dries after getting wet is preferable.

[0035] <Attraction area> The insect trapping device of the present invention has an attractant area that makes crawling insects at a distance want to approach, in order to improve trapping efficiency. The attractant area can be formed, for example, on the outer surface of the base material. Crawling insects have a habit of avoiding sticky surfaces, and the attractant area is not sticky. The attractant area serves as a foothold for crawling insects to climb towards the trapping area above. Therefore, the attractant area is formed at the bottom of the trapping device when it is installed, in a position where crawling insects will collide with it as they walk. It is preferable that the surface of the attractant area has a certain degree of roughness rather than being smooth, so that it is easy for crawling insects to climb.

[0036] Crawling insects generally prefer dark environments, and the attractant area should be dark in color. The lightness L* of the attractant area is, for example, 40 or less, preferably 1 to 30, and more preferably 1 to 12. To make the attractant area dark, dark-colored tape may be attached to the trapping device, or dark printing may be applied. The saturation is not particularly limited, but from a cost standpoint, water-resistant black printing may be used.

[0037] <Method for manufacturing a walking insect trap> The trapping device of the present invention can be manufactured, for example, as follows. Specifically, a general-purpose yellow paper is cut to a width of 9 cm and a length of 30 cm. Black tape is attached to both sides of the bottom part, 5 cm wide, and transparent double-sided adhesive tape is attached to both sides of the top part, 4 cm wide, to create a 30 cm long piece of paper consisting of 4 cm wide yellow and 5 cm wide black strips. This is then cut to a length of 5 cm to obtain a piece of paper measuring 9 cm wide x 5 cm long. The black portion is further cut into a home plate shape to serve as the tip for setting it on the ground, resulting in the trapping device of the present invention shown in Figure 1. Furthermore, the top can be cut off to create the form shown in Figure 3. Figure 4 shows this installed in an actual cultivation pot.

[0038] <Methods for controlling crawling insects> When controlling crawling insects by capturing multiple, preferably numerous, crawling insects, the crawling insect trapping device of the present invention is installed in the location where the crawling insects are to be captured. Examples of locations where crawling insects are to be captured include fields where crops that crawling insects feed on are cultivated, as well as the ground in planters, seedling pots, and pots of ornamental plants.

[0039] In one embodiment, the crawling insect trapping device of the present invention may be installed above the plant, with the ground level as a reference. For crawling insects that tend to move upward relative to the ground, a control method that captures them above the plant is also effective from the viewpoint of increasing capture efficiency. Mites are an example of crawling insects that have the property of moving upward relative to the ground. As a result, the crawling insects can climb up from the ground along the plant to reach the crawling insect trapping device of the present invention and be easily captured.

[0040] The walking insect trap of the present invention can be installed above a plant by, for example, fixing it to a support of an appropriate height. As the support for the walking insect trap, rod-shaped members, columnar members, wire mesh, and wire can be used. It is preferable that the walking insect trap or its support is in contact with the plant, and more preferably that it is in contact with the plant above it. Figure 6 shows the walking insect trap of the present invention installed above a plant. [Examples]

[0041] The present invention will be described below based on examples. However, the present invention is not limited to these examples, and these examples can be modified and altered in accordance with the spirit of the invention; such modifications do not exclude them from the scope of the invention.

[0042] (Evaluation of spider mite capture rate) First, as shown in Figure 2, a box-shaped structure 50 (5 cm long, 5 cm wide, 5 cm high) made from commercially available black cardboard (0.21 mm thick) was prepared, and the prepared trapping device was attached to a part of the four outer surfaces 51 of the box 50, specifically to the surface 51a on the upper side 52.

[0043] Next, 100 non-diapause female spider mites were placed inside box 50. After 24 hours, the number of spider mites captured on the pointed part of the trapping device was counted, and the capture rate was calculated using the following formula (1). This procedure was repeated three times, and the average capture rate was calculated.

[0044] [Mathematics 1] Capture rate (%) = {Number of spider mites captured / 100} × 100 (1)

[0045] (Measurement of brightness) The measurements were taken using the SQ7700 spectrophotometer (manufactured by Nippon Denshoku Industries).

[0046] (Example 1) A yellow insect trapping sheet product called "New Mushibanban" (product name, manufactured by Daikyo Giken), which is made of water-resistant paper coated with hot-melt adhesive, was cut to 5cm x 9cm. The bottom 5cm x 5cm section was covered on both sides with black masking tape "Matte Black MT01P207R" (manufactured by Kamoi Kakoshi) to form an attractant area. Slits were made vertically in the upper trapping area and the lower attractant area with a width of 5.5mm, and the lower attractant area was further cut to form the tip, resulting in the shape shown in Figure 3.

[0047] Measurements using a light meter showed that the light intensity of the capture area was 88, while the light intensity of the attraction area was 6, resulting in a difference of 82.

[0048] This was used to evaluate the mite capture rate. The results are shown in Table 1.

[0049] (Example 2) A commercially available Kent paper (green, 0.2mm thick) was cut to 5cm x 5cm, and double-sided adhesive tape "Kiku Double® Tape No. 200" (manufactured by Kikusui Tape) was attached to both sides. The green adhesive portion was then cut in a jagged pattern to form the upper capture area. Separately, a commercially available black cardboard (0.21mm thick) was cut and attached to form the lower attraction area, resulting in the shape shown in Figure 5.

[0050] Measurements using a light meter showed that the light intensity of the capture area was 80, while the light intensity of the attraction area was 12, resulting in a difference of 68.

[0051] This was used to evaluate the mite capture rate. The results are shown in Table 1.

[0052] (Comparative Example 1) A trapping device was prepared in the same manner as in Example 1, except that the attractant area used the same yellow, non-adhesive paper as the trapping area.

[0053] Measurements using a light meter showed that the light intensity of the capture area was 88, and the light intensity of the attraction area was also 88, with a difference of 0.

[0054] This was used to evaluate the mite capture rate. The results are shown in Table 1.

[0055] (Comparative Example 2) The trapping device was prepared in the same manner as in Example 1, except that green protective tape "No. 8500-AL" (manufactured by Kamoi Kakoshi) was used to cover the attracting area.

[0056] Measurements using a light meter showed that the light intensity of the capture area was 88 and the light intensity of the attraction area was 65, with a difference of 13. This was used to evaluate the spider mite capture rate. The results are shown in Table 1.

[0057] (Comparative Example 3) In the enclosure 50 used for measuring and evaluating spider mites, yellow insect trapping sheets called "New Mushibanban" (manufactured by Daikyo Giken), coated with hot-melt adhesive, were cut into 5cm x 5cm pieces and attached to the four vertical surfaces on the inside. In this state, 100 two-spotted spider mites (non-diapause females) were placed inside the enclosure 50, and the capture rate was evaluated in the same manner. As shown in Table 1, the result was 9%, indicating that fewer spider mites climbed the four sticky vertical surfaces, resulting in a low capture rate. This result also indicates that spider mites need a non-sticky vertical foothold to climb in the first place.

[0058] [Table 1] [Industrial applicability]

[0059] As described above, the present invention is particularly useful as a crawling insect trapping device for capturing crawling insects such as spider mites. [Explanation of Symbols]

[0060] (1) Walking insect trap (2) Adhesive surface (yellow) (3) Non-adhesive side (black) (4) Tip for thrusting into the ground 50 box body 51 Outer surface of the box 51a A part of the outer surface of the box body, specifically the upper side surface.

Claims

1. A walking insect trapping device having a base material with an outer surface on which walking insects can walk, The aforementioned base material consists of a self-supporting plate-like member, It has an attracting area that is not sticky and a trapping area that is sticky, A walking insect trapping device, wherein the attracting area is dark in color and the trapping area is light in color.

2. The walking insect trapping device according to claim 1, wherein, in the installed state, the attracting area is located at the bottom of the walking insect trapping device, and the trapping area is located above the attracting area.

3. The walking insect trapping device according to claim 1, wherein the difference in brightness (L* value) between the attracting area and the trapping area is 40 or more.

4. The walking insect trapping device according to claim 1, wherein the attracting area and the trapping area have adjacent parts to each other.

5. The walking insect trapping device according to claim 1, wherein the trapping area has an end or a pointed portion.

6. A walking insect trapping device according to claim 1, having a tip at the bottom for being stuck into the ground and fixed in place.

7. The crawling insect trapping device according to any one of claims 1 to 6, wherein the crawling insect is a mite.

8. A method for controlling crawling insects, comprising installing a crawling insect trapping device according to any one of claims 1 to 6 in a place where crawling insects are to be captured.

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