Patent Application
20250160311
The present invention relates to an ambulatory pest trapping device that traps, with an adhesive surface thereof, ambulatory pests such as spider mites.
In recent years, damage caused by agricultural pests that have acquired resistance to existing insecticides has been increasing. For example, crop damage has been spreading due to whiteflies, pests of the order Hemiptera such as stink bugs, greenflies, and scale insects, pests of the order Thysanoptera, and pests of the order Acarina such as families Tetranychidae, Eriophyidae, Acaridae, and Jarsonemidae.
In particular, pests of the order Acarina such as spider mites have high fecundity, and although they have natural enemies, insecticides kill the natural enemies themselves, resulting in the “resurgence” phenomenon, in which pests of the order Acarina that have acquired drug resistance are growing instead.
In view of this, there have been proposed devices that trap these pests. For example, there has been proposed a pest trapping device having a corrugated plate processed into a wave-like form and an adhesive body having an adhesive surface that faces the corrugated plate and is adhered to corrugated ridges of the corrugated plate. The pest trapping device is provided with pest entrance portions between the adhesive surface of the adhesive body and the corrugated ridges of the corrugated plate (see, for example, Patent Document 1).
The pest trapping device disclosed in Patent Document 1 traps pests by causing legs of the pests to stick to the adhesive surface. However, a contact area between the legs of the pests and the adhesive surface is small, which may disadvantageously result in insufficient adhesive strength, making it difficult to trap pests.
Therefore, the present invention has been made in view of the above-described problems, and an object of the present invention is to provide an ambulatory pest trapping device capable of efficiently trapping ambulatory pests including spider mites.
The present inventors have conducted intensive studies to solve the above-described problems and have completed the present invention. Specifically, the present invention provides the following suitable aspects.
In the present invention, a pointed protrusion at least part of which is covered with an adhesive is included, and the pointed protrusion has a tip radius of curvature of 0.001 mm to 1.0 mm or less. This makes it possible to reliably trap ambulatory pests.
Embodiments of the present invention will be described in detail below, with reference to the drawings. The present invention is not limited to the embodiments below.
Ambulatory pests in the present invention refer to pests that move by crawling or creeping among pests such as agricultural pests which eat crop plants such as grains, vegetables, and fruits cultivated in rice fields, fields, and the like and suck juices thereof to cause damage, sanitary pests that cause harm to human and animals by biting or stinging their bodies, and unpleasant pests that cause discomfort although they have little direct influence on the human bodies. Ambulatory pests also include pests which are flying pests but are capable of moving by crawling.
Examples of the agricultural pests include: whiteflies, stink bugs, greenflies, scale insects, pests of the order Thysanoptera, pests of the order Acarina such as families Tetranychidae, Eriophyidae, Tarsonemidae, Acaridae, and the like which are plant parasitic, larvae of butterflies and moths, and slugs. Examples of the sanitary pests and the unpleasant pests include bedbugs, ants, cockroaches, mites, centipedes, millipedes, and spiders.
An ambulatory pest trapping device 1 according to the present embodiment includes an upper sheet 2 on which ambulatory pests B are capable of crawling, a lower sheet 4 which is provided to face the upper sheet 2 and on which the ambulatory pests B are capable of crawling, and a corrugated intermediate sheet 3 provided between the upper sheet 2 and the lower sheet 4.
Spaces 11 through which the ambulatory pests B can pass are formed between the upper sheet 2 and the intermediate sheet 3 and between the lower sheet 4 and the intermediate sheet 3.
As illustrated in
The ambulatory pests 8 which have crawled on the upper sheet 2, the lower sheet 4, and the adhesive sheet 8 in which the intermediate sheet 3 is covered with the adhesive 5 reach the pointed protrusions 7 made of the adhesive 5. While the ambulatory pests B are crawling on the pointed protrusions 7, the abdomens thereof are adhered to the adhesive 5 forming the pointed protrusions 7, and the legs thereof are float in the air, so that the ambulatory pests B cannot move and are trapped.
As described above, in the ambulatory pest trapping device 1 according to the present embodiment, the ambulatory pests B can be trapped on the entire pointed protrusions 7 illustrated in
It is known that the order Acarina, particularly spider mites, has strong leg power and moves around in a wide range. Since the tips of the legs are pointed so as to easily climb the surface of the plant, the legs are not caught on the flat adhesive surface and can relatively freely move around. Therefore, it is difficult to trap the legs of spider mites by adhesion with a flat adhesive sheet.
In contrast, the ambulatory pest trapping device 1 according to the present embodiment is based on the findings obtained by observation of the behavior of spider mites, and when ambulatory pests such as spider mites move on the pointed protrusions 7 made of the adhesive 5, the tips of the pointed protrusions come into contact with the abdomens thereof, so that the ambulatory pests such as spider mites can be efficiently trapped.
The “pointed protrusion” refers to, as illustrated in
Further, the “tip radius of curvature R” refers to, as illustrated in
In the present embodiment, the tip radius of curvature of the pointed protrusion 7 is 0.001 mm to 1.0 mm. If the tip radius of curvature is less then the lower limit, it is difficult to actually produce the pointed protrusion by injection molding, and the pointed protrusion becomes fragile and easily deformed, which is not preferable. If the tip radius of curvature is larger than the upper limit, the pointed protrusion becomes relatively gentle, and even if ambulatory pests move on the protrusion, it is difficult to catch them by adhering their abdomens, which is not preferable. The range of the tip radius of curvature R is preferably 0.005 mm to 0.5 mm, more preferably 0.01 mm to 0.2 mm.
With such a configuration, the ambulatory pests B crawling on the pointed protrusions 7 are easily caught by the pointed protrusions 7, and the abdomens thereof are easily adhered to the pointed protrusions 7, thereby improving the efficiency of trapping the ambulatory pests B.
For each of the pointed protrusions 7 of the present embodiment, as illustrated in
Further, in the present embodiment, the sum L of lengths of the ridged pointed protrusions 7 per unit area (I cm2) is preferably from 10 mm/cm2 to 1000 mm/m2 inclusive. When the sum L is larger than the lower limit, the trapping efficiency is not reduced, thereby providing excellent practicality. When the total length L is the upper limit or less, the distance between the ridges is not too small, and each ridge can independently exhibit the trapping efficiency.
Note that the “ridged” refers to the state where the pointed protrusions 7 are connected in a ridge line shape and have a specific length.
For example, in the ambulatory pest trapping device 1 illustrated in
With such a configuration, the number of pointed protrusions 7 per unit area increases. Thus, the ambulatory pests B crawling on the pointed protrusions 7 are easily caught by the pointed protrusions 7, and the abdomens thereof are easily adhered to the adhesive 5 forming the pointed protrusions 7, thereby improving the efficiency of trapping the ambulatory pests B.
The configuration continuously having a larger number of such structures allows more pointed protrusions to be secured. Further, in view of improving productivity, the ambulatory pest trapping device 1 may be configured by forming a sheet continuously having such structures in a roll shape and processing the sheet to have a predetermined width and a predetermined length.
Each size (the length N, the height H, the width W) of the ambulatory pest trapping device 1 is not particularly limited, and can be set appropriately according to the intended use. For example, when the ambulatory pest trapping device 1 is used to eliminate spider mites at a protected horticulture site, the length N thereof may be 30 cm to 100 cm, the height H thereof may be 1 cm to 5 cm, and the width thereof may be 1 cm to 5 cm, considering the size of spider mites (0.5 mm to 1 mm).
For example, when the ambulatory pest trapping device 1 is used to eliminate house dust mites at home or in a facility, the length N thereof may be 5 cm to 20 cm, the height H thereof may be 1 cm to 5 cm, and the width W thereof may be 1 cm to 5 cm, considering the size of the house dust mites (0.2 mm to 0.5 mm). In such a case, the ambulatory pest trapping device 1 may be placed in a gap between futons and under cushions and carpets where house dust mites are likely to be hiding.
The upper sheet 2 and the lower sheet 4 evenly hold the intermediate sheet 3 covered with the adhesive 5 to impart strength to the intermediate sheet 3 such that the intermediate sheet 3 can be handled as a sheet while providing floor surfaces on which the ambulatory pests B are capable of crawling.
The upper sheet 2 and the lower sheet 4 suitably have moderate irregularities that facilitate crawling of the ambulatory pests B, rather than having a smooth surface, and preferably have, for example, a roughness equal to or rougher than P600 according to ISO 6344-3.
Examples of the material for forming the upper sheet 2 and the lower sheet 4 include films made of cellulose-based paper and thermoplastic resins such as polyester resin, polyamide resin, polyvinyl chloride resin, polyolefin resin, and acrylic resin.
The upper sheet 2 and the lower sheet 4 used are flexible and thin, have good adhering properties with the adhesive 5, have endurance to the adhesive 5, and have good dimensional stability. The upper sheet 2 and the lower sheet 4 may have light-shielding properties or light transparency. When the ambulatory pest trapping device 1 is placed outdoors, the upper sheet 2 and the lower sheet 4 used are preferably water resistant or weather resistant.
Examples of the sheet having light-shielding properties may include a sheet of paper, polylaminated paper, and a film which are colored in black or any other medium-dark color.
As a light-transparent sheet, a transparent film including thermoplastic resin such as polyester resin, polyamide resin, polyvinyl chloride resin, polyolefin resin, or acrylic resin may be used.
When the ambulatory pests are house dust mites having a habit of preferring dark places, the upper sheet 2 having light-shielding properties makes it possible to trap more efficiently the ambulatory pests by using the habit. On the other hand, when the upper sheet 2 and the lower sheet 4 have light transparency, trapped ambulatory pests may be easily visible from the outside of the device.
The intermediate sheet 3 is sandwiched between the upper sheet 2 and the lower sheet 4 to hold the pointed protrusions 7 made of the adhesive 5.
Examples of the material for forming the intermediate sheet 3 include films made of cellulose-based paper and thermoplastic resins such as polyester resin, polyamide resin, polyvinyl chloride resin, polyolefin resin, acrylic resin, as for the upper sheet 2 and the lower sheet 4 described above.
The upper sheet 2 and the lower sheet 4 used are flexible and thin, have good adhering properties with the adhesive 5, have endurance to the adhesive 5, and have good dimensional stability. When the ambulatory pest trapping device 1 is placed outdoors, the upper sheet 2 and the lower sheet 4 used are preferably water resistant or weather resistant.
The adhesive 5 is configured to come into contact with ambulatory pests B and traps the ambulatory pests B by its adhesive surface. The adhesive 5 is not particularly limited as long as having appropriate adhesiveness for trapping the ambulatory pests B. The adhesive 5 may be made of an acrylic, rubber-based, SIS block-based, silicon-based, or urethan-based adhesive. Note that these adhesives may be used alone or in combination of two or more of them.
As the adhesive 5, a double-sided adhesive sheet may also be used. In such a case, the double-sided adhesive sheet includes a sheet-like substrate and adhesives applied on both sides of the substrate, and the substrate sandwiched between the adhesives is not particularly limited, and a thin sheet-like substrate such as paper and a film can be used.
In view of reliably trapping the ambulatory pests B, the adhesive sheet 5 is preferably a permanently bonding adhesive sheet that bonds a target to be adhered semi-permanently once the adhesive sheet is adhered to the target. A removable adhesive sheet that is to be peeled off after sticking for a certain period of time has relatively worse adhesiveness and may thus be not preferably used.
The ambulatory pest trapping device 1 of the present embodiment may contain a phosphorescent substance. The phosphorescent substance attracts ambulatory pests and easily guides them into the pointed protrusions 7.
More specifically, for example, it is known that nondormant female spider mites which act from spring to autumn have a property of avoiding ultraviolet light and preferring visible light, and spider mites are attracted to visible light emitted by the phosphorescent substance in the ambulatory pest trapping device 1 of the present embodiment at night, and therefore, the trapping efficiency can be further improved.
The phosphorescent substance is not particularly limited as long as having an effect of attracting target ambulatory pests to be trapped, and examples thereof include a yellow-green luminescent phosphorescent pigment (SrAl2O4:Eu, Dy), which is strontium aluminate activated with europium and dysprosium and blue-green luminescent phosphorescent pigment (Sr4Al14O25:Eu, Dy).
The upper sheet 2, the lower sheet 4, the intermediate sheet 3, and the adhesive 5 may contain these phosphorescent substances. When the upper sheet 2, the lower sheet 4, and the intermediate sheet 3 are made of resin, the phosphorescent substance may be kneaded into the resin. In such a case, the phosphorescent substance is gradually released from the inside of the resin molded body, advantageously resulting in a longer lasting effect compared with surface-coated attractants.
As illustrated in
The attaching adhesive sheet 9 may also be used to stack the ambulatory pest trapping device 1 on another ambulatory pest trapping device 1 and integrate them.
In addition, the attaching adhesive sheet 9 may be made of an acrylic adhesive which is easily removable. Note that these adhesives may be used alone or in combination of two or more of them.
The method of using the ambulatory pest trapping device 1 is not particularly limited, and the ambulatory pest trapping device 1 in a cylindrical shape may be placed to surround the periphery of nursery plant, for example. More specific examples of such a method include placing the ambulatory pest trapping device 1 to surround the trunk of tree, placing the ambulatory pest trapping device 1 like a fence around plant such as vegetable seedling, and placing the ambulatory pest trapping device 1 side by side at the root of plant.
Next, an example of a method for producing the ambulatory pest trapping device 1 of this embodiment will be described.
As illustrated in
Then, from the state illustrated in
Then, the adhesive sheet 8 is folded at predetermined intervals in the longitudinal direction to form a corrugated adhesive sheet 8 illustrated in
Then, as illustrated in
Subsequently, from the state illustrated in
Next, the second embodiment of the present invention will be described. The same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
As illustrated in
The ambulatory pest trapping device 15 includes first strands 10, second strands 20, engagement elements (hooks) 30, and pores 40 and is configured such that the adhesive 5 is provided on the surface of a mesh-like molded surface fastener made of a sheet-like molded body 100 (see
As illustrated in
In production of the ambulatory pest trapping device 15 of the present embodiment, first, a mesh-like molded surface fastener is made of thermoplastic resin by using a molding die 1000 of an extruder illustrated in
The molding die 1000 has an opening 1100 as illustrated in
Then, a molding material is fed into the molding die 1000 and extruded, so that as illustrated in
Thus, a base layer 110 is formed as a sheet-like molded body 100 in which the lower ribs 120 as one ribs extending in the extruding direction on one surface and the upper ribs 130 as the other ribs extending in the extruding direction on the other surface are integral with each other.
The upper ribs 130 form engagement elements 30 each having a pointed protrusion 30a (see
In the present embodiment, as illustrated in
Therefore, in the lower rib 120 as one rib extruded from the lower protruding space 1120, a portion 120b extruded from the relatively narrow portion 1120b constitutes the stem 20b of the second strand 20, and a portion 120a extruded from the wide portion 1120a constitutes the parasol-like portion 20a of the second strand 20.
In the extruded sheet-like molded body 100, as illustrated in
Then, the sheet-like molded body 100 is stretched in the extruding direction illustrated in
As a result, spaces are formed between the portions between the cuts, which serve as pores 40. The stretching continues until the pores 40 each have a predetermined size, and in this state, the sheet-like molded body 100 is cooled to fix that shape.
In such processes, the mesh-like molded surface fastener, which serves as a base of the ambulatory pest trapping device 15 of the present embodiment, is produced. Portions separated at the cuts of the base layer 110 serve as resin portions forming a plurality of first strands 10 provided in substantially parallel with each other at intervals as illustrated in
Then, the mesh-like molded surface fastener is cut in predetermined dimensions according to the desired application, and an adhesive 5 is provided for the surface of the mesh-like molded surface fastener Thus, an ambulatory pest trapping device 15 including pointed protrusions 30a in each of which a flange portion 31 in the molded surface fastener is covered with the adhesive 5 is produced as illustrated in
In the ambulatory pest trapping device 15 in which the adhesive 5 is provided for the surface of the mesh-like molded surface fastener which serves as a base, as illustrated in
Further, since a plurality of first strands 10 are arranged at intervals from each other, and a plurality of second strands 20 are arranged at intervals from each other so as to intersect the first strands 10, a pore 40 is formed at a position surrounded by adjacent first strands 10 and adjacent second strands 20.
Then, ambulatory pests B crawling on the ambulatory pest trapping device 15 reach hook-like pointed protrusions 30a covered with the adhesive 5, and while crawling on the pointed protrusions 30a, the abdomens thereof are adhered to the adhesive 5 forming the pointed protrusions 30a, and the legs thereof are float in the air, so that the ambulatory pests B cannot move and are trapped. As described above, in the ambulatory pest trapping device 15 according to the present embodiment, the ambulatory pests B can be trapped on the entire pointed protrusions 30a illustrated in
In the present embodiment, the tip radius of curvature R of each pointed protrusion 30a is 0.001 mm to 1.0 mm. With such a configuration, the ambulatory pests B crawling on the pointed protrusions 30a are easily caught by the pointed protrusions 30a, and the abdomens thereof are easily adhered to the pointed protrusions 30a, thereby improving the efficiency of trapping the ambulatory pests B.
For the side portion (the view taken along the line K of
Further, as illustrated in
Each size of the ambulatory pest trapping device 15 is not particularly limited, and can be set appropriately set according to the intended use. For example, the pitch between the first strands 10 may be 2 mm to 4 mm, the width of the second strand 20 may be 0.2 mm to 1.0 mm, and the width of the engagement element 30 may be 0.5 mm to 3 mm.
The method of using the ambulatory pest trapping device 15 is not particularly limited, and the ambulatory pest trapping device 15 in a ring shape may be placed around the crop plant or attached around a trunk of a fruit tree.
Since the molded surface fastener made of thermoplastic resin is produced as described above, the first strands 10, the second strands 20, and the engagement elements 30 are integral with each other. Since the thermoplastic resin is used as a material, the first strands 10, the second strands 20, and the engagement elements 30 have predetermined strengths.
Examples of the thermoplastic resin forming the mesh-like molded surface fastener include nylon-based resin such as nylon 6 and nylon 66, polyester-based resin such as polylactic acid and polyethylene terephthalate and polybutylene terephthalate, and an ethylene-vinyl alcohol copolymer. In view of durability, heat resistance, molding processability, and the like, a thermoplastic polyester elastomer is preferably used. In view of ecology in disposal after use, bioplastics such as polyethylene terephthalate, polyethylene, polypropylene, polyamide, polytetraethylene terephthalate from biomass and biodegradable polylactic acid, polyhydroxyalkanoic acid, polybutylene succinate, polyethylene succinate, polyethylene succinate adipate, polybutylene adipate terephthalate, polycaprolactone, and the like can also be used.
Next, the third embodiment of the present invention will be described. The same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
The ambulatory pest trapping device of the present embodiment is characterized in that instead of the mesh-like molded surface fastener in the second embodiment above, paper or a mesh-like resin structure made of resin is used, and the paper or mesh-like resin structure with the adhesive described above on its surface is punched out, so that pointed protrusions covered with the adhesive are formed at least in part of the ambulatory pest trapping device.
As the paper 41 serving as the base of the ambulatory pest trapping device 25 illustrated in
The mesh-like resin structure serving as a base of the ambulatory pest trapping device 26 illustrated in
As described above, in the present embodiment, the number of the pointed protrusions 45, 46 is increased as illustrated in
Ambulatory pests B crawling on the ambulatory pest trapping device 25, 26 reach pointed protrusions 45, 46 covered with the adhesive 5, and while crawling on the pointed protrusions 45, 46, the abdomens thereof are adhered to the adhesive 5 forming the pointed protrusions 45, 46, and the legs thereof are float in the air, so that the ambulatory pests B cannot move and are trapped. As described above, in the ambulatory pest trapping device 25 according to the present embodiment, the ambulatory pests B can be trapped on the entire pointed protrusions 45, 46 illustrated in
In the ambulatory pest trapping device 25, the tip radius of curvature R of the pointed protrusion 45 illustrated in
Further, as in the first embodiment, the sum L of the lengths of the pointed protrusions 45 (or the pointed protrusions 46) per unit area (1 cm2) is preferably from 10 mm/cm2 to 1000 mm/m2 inclusive.
As in the ambulatory pest trapping device 19 illustrated in
The pitch between the pointed protrusions 45 (or the pointed protrusions 46) is preferably such that the ambulatory pests B cannot easily move from one pointed protrusion 45 to the other pointed protrusion 45 (or one pointed protrusion 46 to the other pointed protrusion 46)
The embodiments may be modified as described below.
For example, in the second embodiment, the hook-like pointed protrusions 30a are provided. However, the shape of each pointed protrusion 30a is not particularly limited, and may be, for example, a cylindrical shape or a polygonal prism shape (such as a triangular prism shape, a quadrangular prism shape, or a hexagonal prism shape).
In the second embodiment, pointed protrusions 30a are provided for one surface (the first strand 10 side) of the ambulatory pest trapping device 15. However, pointed protrusions 30a may be provided for both surfaces (the first strand 10 side and the second strand 20 side).
In the second embodiment, the sheet-like molded body 100 is stretched to separate the portions with the cuts interposed therebetween, and thus the engagement elements 30 including the pointed protrusions 30a are provided to be separated from each other. However, as in the ambulatory pest trapping device 16 illustrated in
The shape of the ridged pointed protrusion 36 illustrated in
Similarly, for example, as in the ambulatory pest trapping device 18 illustrated in
In the embodiments, ridged pointed protrusions are provided. However, cone-shaped pointed protrusions may be provided instead of the ridged pointed protrusions. More specifically, as in the ambulatory pest trapping device 19 illustrated in
The pointed protrusion 39 includes, as illustrated in
Then, ambulatory pests B crawling on the ambulatory pest trapping device 19 reach conical pointed protrusions 39 covered with the adhesive 5, and while crawling on the pointed protrusions 39, the abdomens thereof are adhered to the adhesive 5 forming the pointed protrusions 39, and the legs thereof are float in the air, so that the ambulatory pests B cannot move and are trapped. As described above, in the ambulatory pest trapping device 19, the ambulatory pests B can be trapped on the entire pointed protrusions 39 illustrated in
As in the ambulatory pest trapping device 19, the number P of apexes 39a of the cone-shaped pointed protrusions 39 per unit area (1 cm2) is preferably from 10/cm2 to 1000/cm2 inclusive. When the number P is equal to or larger than the lower limit, the trapping efficiency is not reduced, thereby providing excellent practicality. When the number P is equal to or lower than the upper limit, the pointed protrusions can be formed with high producing accuracy.
In the ambulatory pest trapping device 19 illustrated in
With such a configuration, the number of pointed protrusions 39 per unit area increases. Thus, the ambulatory pests B crawling on the pointed protrusions 39 are easily caught by the pointed protrusions 39, and the abdomens thereof are easily adhered to the adhesive 5 forming the pointed protrusions 39, thereby improving the efficiency of trapping the ambulatory pests B.
The shape of the pointed protrusion 39 illustrated in
The ambulatory pest trapping device may have combination of ridged pointed protrusions and cone-shaped pointed protrusions. For example, as in the ambulatory pest trapping device 23 illustrated in
The ambulatory pest trapping device may have at least one of ridged pointed protrusions or cone-shaped pointed protrusions.
As illustrated in
Next, 100 twospotted spider mites (non-dormant females) were placed inside the box 50, and after 24 hours, the number of twospotted spider mites trapped on pointed protrusions of the ambulatory pest trapping device was counted, and the trapping rate was calculated using the following equation (1). The process was performed a total of three times, and the average value of the trapping rates was determined.
[Math. 1]
Trapping Rate (%)={The number of twospotted spider mites trapped/100}×100 (1)
Commercially available Kent paper (thickness: 0.21 mm) serving as an intermediate sheet was cut into a size of 10 mm wide and 364 mm long, and commercially available double-sided tapes (manufactured by KIKUSUI TAPE, trade name: KIKUDOUBLE 200, width: 20 mm, thickness: 0.084 mm) as adhesives were attached to both sides of the cut sheet. At this time, the double-sided tapes were attached to cover the entire 10 mm width Kent paper and were adhered to each other so that ridged pointed protrusions made of the double-sided tapes were formed on both ends of the Kent paper in the width direction. Then, the Kent paper to which double-sided tapes had been adhered was creased at intervals of 10 mm in the length direction to produce a bellows-shaped body (i.e., an adhesive sheet in which an intermediate sheet is covered with the adhesives) with a width of 20 mm, a height of 10 mm, and a length of 100 mm.
Further, two sheets each with a width of 10 mm and a length of 100 mm were cut out from commercially available Kent paper (thickness: 0.21 mm) and used as an upper sheet and a lower sheet. Then, the upper sheet and the lower sheet were disposed to face each other, and the adhesive sheet which is the bellows-shaped body intervened therebetween.
Subsequently, from the state, the upper sheet and the lower sheet were pressed toward the adhesive sheet to bring the adhesive sheet into contact with the upper sheet and the lower sheet. Thus, an ambulatory pest trapping device including pointed protrusions was produced.
In such a case, ridged pointed protrusions made of an adhesive (adhesive tape) covering the ends of the intermediate sheet as illustrated in
The trapping rate for twospotted spider mites was evaluated using the produced ambulatory pest trapping device. The average trapping rate was 80%.
An acrylic adhesive was applied to the surface of a mesh-like molded surface fastener (manufactured by Kuraray Fastening Co., Ltd., trade name: MAGILOCK MX8471) at 2.0 g/m2. Thus, an ambulatory pest trapping device including pointed protrusions in each of which a flange portion of the molded surface fastener was covered with the adhesive was produced.
The tip radius of curvature R in a side portion of the pointed protrusion illustrated in
The produced ambulatory pest trapping device was cut into a size of 20 mm wide and 20 cm long, and the trapping rate for twospotted spider mites was evaluated using the cut piece. The average trapping rate was 87%.
Commercially available double-sided tapes (manufactured by KIKUSUI TAPE, trade name: KIKUDOUBLE 200, width: 20 mm, thickness: 0.084 mm) as adhesives were attached to both sides of commercially available Kent paper (thickness: 0.21 mm). Thereafter, the resultant was punched out to produce an ambulatory pest trapping device (outer shape: 5 cm×5 cm, pitch between pointed protrusions: 2 mm) having a shape illustrated in
The tip radius of curvature R of the pointed protrusion was 0.15 mm. The sum L of the lengths of the pointed protrusions was 40 mm/cm2 to 60 mm/cm2. The number of apexes of the pointed protrusions per unit area was 10/cm2 to 15/cm2.
The trapping rate for twospotted spider mites was evaluated using the produced ambulatory pest trapping device. The average trapping rate was 65%.
A mold in which 25 cones per 1 cm2 could be formed was designed and produced on a sheet of 5 cm wide×and 50 cm long, and using the mold, polyethylene resin was injection-molded. Thus, a sheet having a plurality of conical protrusions in a pinholder shape was produced. Then, acrylic adhesive was applied to the surface of this resin sheet at 3.2 g/m2. Thus, an ambulatory pest trapping device including pointed protrusions covered with the adhesive was produced.
In the ambulatory pest trapping device, the pitch between the conical pointed protrusions was 1 mm, and the height of each pointed protrusion was 2 mm. The diameter of the bottom portion of the pointed protrusion was 0.9 mm. The tip radius of curvature R of the pointed protrusion illustrated in
The produced ambulatory pest trapping device was cut into a size of 20 mm wide and 20 cm long, and the trapping rate for twospotted spider mites was evaluated using the cut piece. The average trapping rate was 77%.
An acrylic adhesive was applied to the surface of a mesh-like molded body (manufactured by C.I. TAKIRONCIVIL Corporation, trade name: N-2, mesh pitch: 1.8 mm 1.8 mm, mesh leg thickness: 0.5 mm) at 2.0 g/m2, which was then cut into a size of 5 cm×5 cm. Thereafter, the resultant was punched out to produce an ambulatory pest trapping device having a shape illustrated in
The tip radius of curvature R of the pointed protrusion was 0.05 mm to 0.5 mm. The sum L of the lengths of the pointed protrusions was 10 mm/cm2 to 30 mm/cm2. The number of apexes of the pointed protrusions per unit area was 15/cm2 to 30/cm2.
The trapping rate for twospotted spider mites was evaluated using the produced ambulatory pest trapping device. The average trapping rate was 73%.
A commercially available double-sided tape (manufactured by KIKUSUI TAPE, trade name: KIKUDOUBLE 200, width: 20 mm, thickness: 0.084 mm) as an adhesive was attached to one side of commercially available Kent paper (thickness: 0.21 mm). The attached portion was cut into a size of 20 mm wide and 20 cm long and rounded to have a curvature radius of 10 mm in the width direction to form a convex adhesive surface on the outer side. Thus, a semicylindrical ambulatory pest trapping device was produced.
The trapping rate for twospotted spider mites was evaluated using the device. The average trapping rate was 1%.
As described above, the present invention is particularly useful as an ambulatory pest trapping device that traps, with pointed protrusions thereof, ambulatory pests.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2021-162950 | Oct 2021 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2022/036694 | 9/30/2022 | WO |
