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WO2010016561A2 - Insect pest controlling net - Google Patents

Insect pest controlling net Download PDF

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Publication number
WO2010016561A2
WO2010016561A2 PCT/JP2009/063979 JP2009063979W WO2010016561A2 WO 2010016561 A2 WO2010016561 A2 WO 2010016561A2 JP 2009063979 W JP2009063979 W JP 2009063979W WO 2010016561 A2 WO2010016561 A2 WO 2010016561A2
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WO
WIPO (PCT)
Prior art keywords
resin yarn
insect pest
weight
yarn
resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2009/063979
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French (fr)
Other versions
WO2010016561A3 (en
Inventor
Tetsuo Harada
Takahisa Hirayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Filing date
Publication date
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Publication of WO2010016561A2 publication Critical patent/WO2010016561A2/en
Anticipated expiration legal-status Critical
Publication of WO2010016561A3 publication Critical patent/WO2010016561A3/en
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/34—Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N53/00—Biocides, pest repellants or attractants, or plant growth regulators containing cyclopropane carboxylic acids or derivatives thereof

Definitions

  • the present invention relates to an insect pest controlling net for constituting, for example, a mosquito net or screen door.
  • Insect pest controlling nets constituted of a resin yarn containing an insecticide component are shown, for example, in patent documents 1 and 2.
  • an insect repellent acryl fiber containing an insecticide component such as a pyrethroid compound or the like and a synergist component together is shown in patent document 3.
  • Patent document 1 JP-A No. 2008-13508
  • Patent document 2 JP-A No. 8-163950
  • Patent document 3 JP-B No. 2-55551
  • the present invention has an object of providing an insect pest controlling net which can be produced at low cost and, additionally, can manifest a satisfactory strong insecticidal effect. (Means for solving the Problem)
  • the present invention is an insect pest controlling net formed by knitting or weaving a resin yarn so as to form a lot of meshes, wherein a first resin yarn and a second resin yarn are used together as the resin yarn, the first resin yarn contains an insecticide component, and the second resin yarn contains a synergist component.
  • the insect pest controlling net of the present invention a satisfactory strong insecticidal effect can be manifested on insect pests. Further, according to the insect pest controlling net of the present invention, since the first resin yarn contains an insecticide component and the second resin yarn contains a synergist component, each of the first resin yarn and the second resin yarn can be produced at lower cost as compared with a resin yarn containing both an insecticide component and a synergist component, and insect pest controlling nets of various grades suitable for the object can be produced by controlling the proportion of the first resin yarn and the second resin yarn, and the knitting method and weaving method.
  • Fig. 1 is a view showing one example of the knitted structure of the insect pest controlling net of the present invention.
  • Fig. 2 is a view showing one example of the woven structure of the insect pest controlling net of the present invention.
  • first resin yarn 2 second resin yarn 3 : mesh Best Mode for Carrying Out the Invention
  • the insect pest controlling net of the present invention is formed by knitting or weaving a resin yarn so as to form a lot of meshes.
  • a first resin yarn and a second resin yarn are used together as the resin yarn.
  • the first resin yarn contains an insecticide component.
  • the second resin yarn contains a synergist component.
  • the net of the present invention has a knitted structure when constituted by knitting, and has a woven structure when constituted by weaving.
  • Fig. 1 shows one example of the knitted structure
  • Fig. 2 shows one example of the woven structure.
  • each mesh is constituted of a first resin yarn and a second resin yarn, both in the case of the knitted structure and in the case of the woven structure.
  • the knitted structure shown in Fig. 1 is constituted by using a first resin yarn 1 and a second resin yarn 2 together as warp and alternately, and knitting them. Therefore, each mesh 3 is surrounded by the first resin yarn 1 and the second resin yarn 2.
  • the woven structure shown in Fig. 2 is constituted by using a first resin yarn 1 as warp and using a second resin yarn 2 as weft, and weaving them. Therefore, each mesh 3 is surrounded by the first resin yarn 1 and the second resin yarn 2.
  • the net of the present invention has a knitted structure.
  • the mesh size is appropriately set depending on the body length of an insect pest as the controlling subject, and may advantageously be a size such that the insect pest comes into contact with the net when the insect pest is trying to pass through the net.
  • the mesh size (hole size) is in the range of 2 to 5 mm, preferably 2 to 4 mm.
  • thermoplastic resins are usually used as the resin component constituting the first resin yarn and/or the second resin yarn.
  • thermoplastic resin examples include polyolefin, polyvinyl chloride, polycarbonate, polyester, nylons, acryl and the like.
  • polyolefin for example, polyethylene (low density polyethylene, linear low density polyethylene, middle density polyethylene, high density polyethylene) , copolymer of ethylene and ⁇ -olefins having 3 or more carbon atoms, polypropylene homopolymer, copolymer of ethylene and carboxylic acid derivatives having an ethylenically unsaturated bond, and the like
  • polyethylene is particularly preferable.
  • the resin yarn When a polyolefin is used, the resin yarn can be endowed with durability which is satisfactory as an insect pest controlling net.
  • Other resin components for example, polyester may also be used.
  • the insecticide component is kneaded in the resin yarn from the standpoint of aftereffect.
  • the first resin yarn can be produced as described below. That is, a resin component and an insecticide component are mixed, melt- kneaded using a single screw extruder, and molded into pellets. From the pellet, a resin yarn is spun. By this, the insecticide component is dispersed and present in the resin yarn. Therefore, in the first resin yarn, the insecticide component bleeds out on the surface of the yarn, and an insect pest comes into contact with the insecticide component on the surface of the yarn, thereby manifesting an insecticidal effect.
  • the insecticide component may be coated on the surface of the resin yarn. Also in this case, an insect pest comes into contact with the insecticide component on the surface of the yarn, thereby manifesting an insecticidal effect.
  • the synergist component is kneaded in the resin yarn from the standpoint of aftereffect.
  • the second resin yarn can be produced as described below. That is, a resin component and a synergist component are mixed, melt-kneaded using a single screw extruder, and molded into pellets. From the pellet, a resin yarn is spun. By this, the synergist component is dispersed and present in the resin yarn. Therefore, in the second resin yarn, the synergist component bleeds out on the surface of the yarn, and an insect pest comes into contact with the synergist component on the surface of the yarn, thereby manifesting an effect of enhancing the insecticidal effect by the insecticide component in first resin yarn.
  • the synergist component may be coated on the surface of the resin yarn. Also in this case, an insect pest comes into contact with the synergist component on the surface of the yarn, thereby manifesting an effect of enhancing the insecticidal effect by the insecticide component in first resin yarn.
  • the first resin yarn and/or the second resin yarn is preferably a monofilament having given breadth.
  • given breadth means a breadth capable of maintaining strength as an insect pest controlling net.
  • the insecticide component includes preferably, but not limited to, pyrethroid compounds, and examples thereof include permethrin, cyphenothrin, d-phenothrin, resmethrin, fenvalerate, esfenvalerate, fenpropathrin, etofenprox, tralomethrin, deltamethrin, silafluofen, bifenthrin and the like.
  • Examples of the synergist component include the following components. ⁇ - [2- (2-butoxyethoxy) ethoxy] -4, 5-methylenedioxy-2- propyltoluene (piperonyl butoxide: PBO),
  • an insect pest comes into contact with an insecticide component on the surface of the first resin yarn 1 and comes into contact with a synergist component on the surface of the second resin yarn 2.
  • the insect pest undergoes a higher insecticidal effect as compared with the case of contacting only with an insecticide component. Therefore, the insect pest is surely controlled.
  • a higher insecticidal effect can be exerted on an insect pest by bringing the insect pest into contact with an insecticide component of the first resin yarn and a synergist component of the second resin yarn, thus, a satisfactory strong insecticidal effect can be manifested.
  • the first resin yarn contains an insecticide component and no synergist component
  • the second resin yarn contains a synergist component and no insecticide component. Therefore, the following effects can be manifested.
  • Each of the first resin yarn and the second resin yarn can be produced at lower cost as compared with a resin yarn containing both an insecticide component and a synergist component. Therefore, the insect pest controlling net of the present invention can be produced at low cost.
  • each of the first resin yarn and the second resin yarn contains only either an insecticide component or a synergist component
  • a resin as an optimum carrier for each of an insecticide component and a synergist component can be selected. Therefore, the insect pest controlling net of the present invention shows higher degree of freedom in product design, as compared with the case of use of a resin yarn containing both an insecticide component and a synergist component.
  • the insecticide component When an insecticide component is kneaded in the first resin yarn, the insecticide component is capable of gradually bleeding out on the surface of the yarn, so that sustention of an insecticidal effect can be improved.
  • the synergist component When a synergist component is kneaded in the second resin yarn, the synergist component is capable of gradually bleeding out on the surface of the yarn, so that sustention of an effect by the synergist component can be improved.
  • insect pests can be controlled.
  • flying insect pests as described below can be controlled.
  • examples thereof include Culex such as Culex pipiens pallens, Culex tritaeniorhynchus Giles and the like; Aedes such as Aedes aegypti, Aedes albopictus and the like; Anopheles such as Anopheles sinensis Wiedemann and the like; Telmatogeton; Muscidae such as Musca domestica, Muscina, Fannia canicularis and the like; Cilliphorini; Sarcophagidae; Drosophilidae; Phychodidae; Phoridae; Tabanidae; Simuliidae; Stomoxys; Ceratopogonidae.
  • Culex such as Culex pipiens pallens, Culex tritaeniorhynchus Giles and the like
  • Aedes such as Aedes a
  • the insect pest controlling net of this example has a knitted structure shown in Fig. 1, and was fabricated as described below.
  • the first resin yarn 1 and the second resin yarn 2 were used together as warp and alternately, and these were knitted to fabricate a net.
  • the size of a mesh 3 was set so that Ll was about 2 mm and Wl was about 2.5 mm.
  • the insect pest controlling net of this example has a woven structure shown in Fig. 2, and was fabricated as described below.
  • first resin yarn 1 94 parts by weight of polyethylene, 3 parts by weight of amorphous silica , and 3 parts by weight of permethrin were mixed by stirring, then, melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. The weight of the resultant pellets was 60 kg. From 20 kg of the pellets, a first resin yarn 1 was spun. The first resin yarn 1 was a monofilament, and had a breadth of 190 denier.
  • the first resin yarn 1 was used as warp and the second resin yarn 2 was used as weft, and the warp and the weft were woven to fabricate a net.
  • the size of a mesh 3 was set so that L2 was about 2 mm and W2 was about 4 mm.
  • the insect pest controlling net of this example has a woven structure, and was fabricated as described below.
  • amorphous silica 8.2 parts by weight of permethrin, 2.6 parts by weight of zinc stearate , and 0.1 part by weight of BHT were mixed by stirring, then, 15.2 parts by weight of linear low density polyethylene and 70.0 parts by weight of high density polyethylene were added, and the mixture was melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. Next, 50.0 parts by weight of the resultant pellets and 50.0 parts by weight of high density polyethylene were melt-kneaded. From the resultant mixture, a first resin yarn was spun at a process temperature of
  • the first resin yarn was a monofilament, and had a breadth of 193 denier.
  • the second resin yarn was a monofilament, and had a breadth of 203 denier.
  • the first resin yarn and the second resin yarn were used as warp, the first resin yarn was used as weft, and the warp and the weft were woven to fabricate a net.
  • the warps were placed at a distance of about 2.5 mm.
  • the wefts were placed at a distance of about 4.0 mm.
  • For the warp a cycle of continuous placing of three second resin yarns and placing of one first resin yarn was repeated.
  • the insect pest controlling net of this example has a woven structure, and was fabricated as described below.
  • amorphous silica 8.2 parts by weight of permethrin, 2.6 parts by weight of zinc stearate , and 0.1 part by weight of BHT were mixed by stirring, then, 15.2 parts by weight of linear low density polyethylene and 70.0 parts by weight of high density polyethylene were added, and the mixture was melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. Next, 50.0 parts by weight of the resultant pellets and 50.0 parts by weight of high density polyethylene were melt-kneaded. From the resultant mixture, a first resin yarn was spun at a process temperature of 200°C. The first resin yarn was a monofilament, and had a breadth of 193 denier.
  • amorphous silica 4.1 parts by weight of amorphous silica, 4.2 parts by weight of piperonyl butoxide, 2.6 parts by weight of zinc stearate , and 0.1 part by weight of BHT were mixed by stirring, then, 15.5 parts by weight of linear low density polyethylene and 73.5 parts by weight of high density polyethylene were added, and the mixture was melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. Next, 50.0 parts by weight of the resultant pellets and 50.0 parts by weight of high density polyethylene were melt-kneaded. From the resultant mixture, a second resin yarn was spun at a process temperature of 200°C. The second resin yarn was a monofilament, and had a breadth in the range of 188 to 198 denier.
  • the first resin yarn and the second resin yarn were used as warp, the first resin yarn was used as weft, and the warp and the weft were woven to fabricate a net.
  • the warps were placed at a distance of about 2.5 mm.
  • the wefts were placed at a distance of about 4.0 mm.
  • a cycle of continuous placing of three second resin yarns and placing of one first resin yarn was repeated.
  • the insect pest controlling net of this example has a knitted structure shown in Fig. 1, and was fabricated as described below.
  • first resin yarn 1 4.0 parts by weight of amorphous silica, 8.2 parts by weight of permethrin, 2.6 parts by weight of zinc stearate , and 0.1 part by weight of BHT were mixed by stirring, then, 85.1 parts by weight of polyethylene was added, and the mixture was melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. Next, 50.0 parts by weight of the resultant pellets and 50.0 parts by weight of polyethylene were melt-kneaded. From the resultant mixture, a first resin yarn was spun at a process temperature of 200 0 C. The first resin yarn was a monofilament, and had a breadth of 195 denier. (2) Preparation of second resin yarn 2
  • the second resin yarn was a monofilament, and had a breadth of 197 denier.
  • (3) Fabrication of net The first resin yarn and the second resin yarn were used together as warp and alternately, and these were knitted to fabricate a net.
  • the size of a mesh 3 was set so that Ll was about 2 nun and Wl was about 2.5 mm.
  • the insect pest controlling net of this comparative example has a knitted structure shown in Fig. 1, and was fabricated as described below.
  • first resin yarn 1 4.0 parts by weight of amorphous silica, 4.1 parts by weight of permethrin, 4.1 parts by weight of piperonyl butoxide, 2.6 parts by weight of zinc stearate , and 0.1 part by weight of BHT were mixed by stirring, then, 85.1 parts by weight of polyethylene was added, and the mixture was melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. Next, 50.0 parts by weight of the resultant pellets and 50.0 parts by weight of polyethylene were melt-kneaded. From the resultant mixture, a first resin yarn was spun at a process temperature of 200°C. The first resin yarn was a monofilament, and had a breadth of 194 denier.
  • the first resin yarn was used as the second resin yarn.
  • (3) Fabrication of net The first resin yarn 1 and the second resin yarn 2 were used together as warp and alternately, and these were knitted to fabricate a net.
  • the size of a mesh 3 was set so that Ll was about 2 mm and Wl was about 2.5 mm. [Test 1]
  • the insect pest controlling nets of the third Example and the fourth Example were used as samples.
  • the sample was fabricated as described below. That is, warp and weft were placed on the surface of a metal plate in the form of approximate square of 5 cm x 5 cm. In this procedure, the size of a part (net part) of crossing of warp and weft was set to about 2.5 cm x 2.5 cm. (Test Method) First, the sample was stored on the surface of the above-described metal plate at 30 0 C for 48 hours, then, placed on another horizontal plane. On the sample, a petri dish having a diameter of about 4 cm was covered.
  • the insect pest controlling nets of the fifth Example and the first Comparative Example were used as samples.
  • the sample was washed with 200 ml of acetone, and stored in a temperature-controlled bath of 70°C for 2 hours, then, fixed on a plane. On the sample, a petri dish having a diameter of about 4 cm was covered. Next, 10 female adult insects of Culex quinquefasciatus were released in the petri dish, and left for 3 minutes, then, released in another cage. The number of female adult insects of Culex quinquefasciatus knocked down in a certain time was counted, and the number of dead female adult insects of Culex quinquefasciatus was counted. (Result)
  • the knock down ratio was 100%, and the death ratio was 90%.
  • the knock down ratio was 70%, and the death ratio was 53% .
  • the insect pest controlling net of the present invention can be produced at low cost, and additionally, is capable of manifesting a satisfactory strong insecticidal effect, thus, its industrial utilization value is large.

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Plant Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Pest Control & Pesticides (AREA)
  • Agronomy & Crop Science (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
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  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Catching Or Destruction (AREA)

Abstract

An insect pest controlling net formed by knitting or weaving a resin yarn so as to form a lot of meshes (3), wherein a first resin yarn (1) and a second resin yarn (2) are used together as the resin yarn, the first resin yarn (1) contains an insecticide component, and the second resin yarn (2) contains a synergist component.

Description

DESCRIPTION
INSECT PEST CONTROLLING NET
Technical Field
The present invention relates to an insect pest controlling net for constituting, for example, a mosquito net or screen door.
Background Art
Insect pest controlling nets constituted of a resin yarn containing an insecticide component are shown, for example, in patent documents 1 and 2.
On the other hand, for obtaining a stronger insecticidal effect, an insect repellent acryl fiber containing an insecticide component such as a pyrethroid compound or the like and a synergist component together is shown in patent document 3.
Patent document 1: JP-A No. 2008-13508 Patent document 2: JP-A No. 8-163950 Patent document 3: JP-B No. 2-55551
Disclosure of Invention (Problem to be Solved by the Invention) For obtaining an insect pest controlling net having a stronger insecticidal effect, it is envisaged to allow an insect repellent fiber forming a net to carry a larger amount of insecticide component. However, the amount of an insecticide component which can be stably carried on one fiber is limited. Further, when the carrying amount of an insecticide component is large, the amount of an insecticide component to be removed by washing and the like also becomes large, augmentation of the insecticidal effect and aftereffect corresponding to the increase of the insecticide component are not obtained in some cases.
The present invention has an object of providing an insect pest controlling net which can be produced at low cost and, additionally, can manifest a satisfactory strong insecticidal effect. (Means for solving the Problem)
The present invention is an insect pest controlling net formed by knitting or weaving a resin yarn so as to form a lot of meshes, wherein a first resin yarn and a second resin yarn are used together as the resin yarn, the first resin yarn contains an insecticide component, and the second resin yarn contains a synergist component. (Effect of the Invention)
According to the insect pest controlling net of the present invention, a satisfactory strong insecticidal effect can be manifested on insect pests. Further, according to the insect pest controlling net of the present invention, since the first resin yarn contains an insecticide component and the second resin yarn contains a synergist component, each of the first resin yarn and the second resin yarn can be produced at lower cost as compared with a resin yarn containing both an insecticide component and a synergist component, and insect pest controlling nets of various grades suitable for the object can be produced by controlling the proportion of the first resin yarn and the second resin yarn, and the knitting method and weaving method.
Brief Description of Drawings
Fig. 1 is a view showing one example of the knitted structure of the insect pest controlling net of the present invention.
Fig. 2 is a view showing one example of the woven structure of the insect pest controlling net of the present invention.
Description of References 1: first resin yarn 2: second resin yarn 3 : mesh Best Mode for Carrying Out the Invention
The insect pest controlling net of the present invention is formed by knitting or weaving a resin yarn so as to form a lot of meshes. In the present invention, a first resin yarn and a second resin yarn are used together as the resin yarn. The first resin yarn contains an insecticide component. The second resin yarn contains a synergist component.
The net of the present invention has a knitted structure when constituted by knitting, and has a woven structure when constituted by weaving. Fig. 1 shows one example of the knitted structure, and Fig. 2 shows one example of the woven structure.
In the net of the present invention, it is preferable that each mesh is constituted of a first resin yarn and a second resin yarn, both in the case of the knitted structure and in the case of the woven structure. For example, the knitted structure shown in Fig. 1 is constituted by using a first resin yarn 1 and a second resin yarn 2 together as warp and alternately, and knitting them. Therefore, each mesh 3 is surrounded by the first resin yarn 1 and the second resin yarn 2. The woven structure shown in Fig. 2 is constituted by using a first resin yarn 1 as warp and using a second resin yarn 2 as weft, and weaving them. Therefore, each mesh 3 is surrounded by the first resin yarn 1 and the second resin yarn 2. Incidentally, it is preferable that the net of the present invention has a knitted structure.
The mesh size is appropriately set depending on the body length of an insect pest as the controlling subject, and may advantageously be a size such that the insect pest comes into contact with the net when the insect pest is trying to pass through the net. In general, the mesh size (hole size) is in the range of 2 to 5 mm, preferably 2 to 4 mm.
As the resin component constituting the first resin yarn and/or the second resin yarn, thermoplastic resins are usually used. Examples of the thermoplastic resin include polyolefin, polyvinyl chloride, polycarbonate, polyester, nylons, acryl and the like. From the standpoint of yarn strength and the like, polyolefin (for example, polyethylene (low density polyethylene, linear low density polyethylene, middle density polyethylene, high density polyethylene) , copolymer of ethylene and α-olefins having 3 or more carbon atoms, polypropylene homopolymer, copolymer of ethylene and carboxylic acid derivatives having an ethylenically unsaturated bond, and the like) are preferable, and polyethylene is particularly preferable.
When a polyolefin is used, the resin yarn can be endowed with durability which is satisfactory as an insect pest controlling net. Other resin components, for example, polyester may also be used.
In the first resin yarn, it is preferable that the insecticide component is kneaded in the resin yarn from the standpoint of aftereffect. In this case, the first resin yarn can be produced as described below. That is, a resin component and an insecticide component are mixed, melt- kneaded using a single screw extruder, and molded into pellets. From the pellet, a resin yarn is spun. By this, the insecticide component is dispersed and present in the resin yarn. Therefore, in the first resin yarn, the insecticide component bleeds out on the surface of the yarn, and an insect pest comes into contact with the insecticide component on the surface of the yarn, thereby manifesting an insecticidal effect.
In the first resin yarn, the insecticide component may be coated on the surface of the resin yarn. Also in this case, an insect pest comes into contact with the insecticide component on the surface of the yarn, thereby manifesting an insecticidal effect.
In the second resin yarn, it is preferable that the synergist component is kneaded in the resin yarn from the standpoint of aftereffect. In this case, the second resin yarn can be produced as described below. That is, a resin component and a synergist component are mixed, melt-kneaded using a single screw extruder, and molded into pellets. From the pellet, a resin yarn is spun. By this, the synergist component is dispersed and present in the resin yarn. Therefore, in the second resin yarn, the synergist component bleeds out on the surface of the yarn, and an insect pest comes into contact with the synergist component on the surface of the yarn, thereby manifesting an effect of enhancing the insecticidal effect by the insecticide component in first resin yarn. In the second resin yarn, the synergist component may be coated on the surface of the resin yarn. Also in this case, an insect pest comes into contact with the synergist component on the surface of the yarn, thereby manifesting an effect of enhancing the insecticidal effect by the insecticide component in first resin yarn.
The first resin yarn and/or the second resin yarn is preferably a monofilament having given breadth. By this, a knitting work and a weaving work become easy. In this case, "given breadth" means a breadth capable of maintaining strength as an insect pest controlling net. In general, when the first resin yarn and/or the second resin yarn is a monofilament, it is preferable to use a monofilament in the range of 100 to 350 denier.
The insecticide component includes preferably, but not limited to, pyrethroid compounds, and examples thereof include permethrin, cyphenothrin, d-phenothrin, resmethrin, fenvalerate, esfenvalerate, fenpropathrin, etofenprox, tralomethrin, deltamethrin, silafluofen, bifenthrin and the like. Examples of the synergist component include the following components. α- [2- (2-butoxyethoxy) ethoxy] -4, 5-methylenedioxy-2- propyltoluene (piperonyl butoxide: PBO),
N- (2-ethylhexyl) -l-isopropyl-4-methylbicyclo (2,2,2) oct -5-ene-2, 3-dicarboxyimide (sinepirin 500), Butyl stearate,
Bis- (2, 3, 3, 3-tetrachloropropyl) ether (S-421) , N- ( 2-ethylhexyl )bicyclo[ 2.2. l]hept-5-ene-2, 3- dicarboxyimide (MGK264) . In the insect pest controlling net of the present invention, an approaching insect pest comes into contact with the first resin yarn 1 and the second resin yarn 2, in trying to pass through the mesh 3. Particularly, when the mesh 3 is surrounded by the first resin yarn 1 and the second resin yarn 2, an insect pest comes into contact with the first resin yarn 1 and the second resin yarn 2, simultaneously and without fault. In this case, an insect pest comes into contact with an insecticide component on the surface of the first resin yarn 1 and comes into contact with a synergist component on the surface of the second resin yarn 2. As a result, the insect pest undergoes a higher insecticidal effect as compared with the case of contacting only with an insecticide component. Therefore, the insect pest is surely controlled. As described above, according to the insect pest controlling net of the present invention, a higher insecticidal effect can be exerted on an insect pest by bringing the insect pest into contact with an insecticide component of the first resin yarn and a synergist component of the second resin yarn, thus, a satisfactory strong insecticidal effect can be manifested.
In the insect pest controlling net of the present invention, the first resin yarn contains an insecticide component and no synergist component, and the second resin yarn contains a synergist component and no insecticide component. Therefore, the following effects can be manifested.
(1) Each of the first resin yarn and the second resin yarn can be produced at lower cost as compared with a resin yarn containing both an insecticide component and a synergist component. Therefore, the insect pest controlling net of the present invention can be produced at low cost.
(2) Since each of the first resin yarn and the second resin yarn contains only either an insecticide component or a synergist component, a resin as an optimum carrier for each of an insecticide component and a synergist component can be selected. Therefore, the insect pest controlling net of the present invention shows higher degree of freedom in product design, as compared with the case of use of a resin yarn containing both an insecticide component and a synergist component.
When an insecticide component is kneaded in the first resin yarn, the insecticide component is capable of gradually bleeding out on the surface of the yarn, so that sustention of an insecticidal effect can be improved. When a synergist component is kneaded in the second resin yarn, the synergist component is capable of gradually bleeding out on the surface of the yarn, so that sustention of an effect by the synergist component can be improved.
According to the insect pest controlling net of the present invention, various insect pests can be controlled. Particularly, flying insect pests as described below can be controlled. Examples thereof include Culex such as Culex pipiens pallens, Culex tritaeniorhynchus Giles and the like; Aedes such as Aedes aegypti, Aedes albopictus and the like; Anopheles such as Anopheles sinensis Wiedemann and the like; Telmatogeton; Muscidae such as Musca domestica, Muscina, Fannia canicularis and the like; Cilliphorini; Sarcophagidae; Drosophilidae; Phychodidae; Phoridae; Tabanidae; Simuliidae; Stomoxys; Ceratopogonidae.
Examples
Examples of the insect pest controlling net of the present invention will be illustrated below. The present invention is not limited to these examples. [First Example]
The insect pest controlling net of this example has a knitted structure shown in Fig. 1, and was fabricated as described below.
(1) Preparation of first resin yarn 1
96 parts by weight of polyethylene, 2 parts by weight of amorphous silica , and 2 parts by weight of permethrin were mixed by stirring, then, melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. The weight of the resultant pellets was 60 kg. From 20 kg of the pellets, a first resin yarn 1 was spun. The first resin yarn 1 was a monofilament, and had a breadth of 190 denier. (2) Preparation of second resin yarn 2
96 parts by weight of polyethylene, 2 parts by weight of amorphous silica , and 2 parts by weight of piperonyl butoxide were mixed by stirring, then, melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. The weight of the resultant pellets was 60 kg. From 20 kg of the pellets, a second resin yarn 2 was spun. The second resin yarn 2 was a monofilament, and had a breadth of 190 denier. (3) Fabrication of net
The first resin yarn 1 and the second resin yarn 2 were used together as warp and alternately, and these were knitted to fabricate a net. The size of a mesh 3 was set so that Ll was about 2 mm and Wl was about 2.5 mm. [Second Example]
The insect pest controlling net of this example has a woven structure shown in Fig. 2, and was fabricated as described below.
(1) Preparation of first resin yarn 1 94 parts by weight of polyethylene, 3 parts by weight of amorphous silica , and 3 parts by weight of permethrin were mixed by stirring, then, melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. The weight of the resultant pellets was 60 kg. From 20 kg of the pellets, a first resin yarn 1 was spun. The first resin yarn 1 was a monofilament, and had a breadth of 190 denier.
(2) Preparation of second resin yarn 2
94 parts by weight of polyethylene, 3 parts by weight of amorphous silica , and 3 parts by weight of piperonyl butoxide were mixed by stirring, then, melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. The weight of the resultant pellets was 60 kg. From 20 kg of the pellets, a second resin yarn 2 was spun. The second resin yarn 2 was a monofilament, and had a breadth of 190 denier. (3) Fabrication of net
The first resin yarn 1 was used as warp and the second resin yarn 2 was used as weft, and the warp and the weft were woven to fabricate a net. The size of a mesh 3 was set so that L2 was about 2 mm and W2 was about 4 mm. [Third Example]
The insect pest controlling net of this example has a woven structure, and was fabricated as described below. (1) Preparation of first resin yarn
4.0 parts by weight of amorphous silica, 8.2 parts by weight of permethrin, 2.6 parts by weight of zinc stearate , and 0.1 part by weight of BHT were mixed by stirring, then, 15.2 parts by weight of linear low density polyethylene and 70.0 parts by weight of high density polyethylene were added, and the mixture was melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. Next, 50.0 parts by weight of the resultant pellets and 50.0 parts by weight of high density polyethylene were melt-kneaded. From the resultant mixture, a first resin yarn was spun at a process temperature of
200°C. The first resin yarn was a monofilament, and had a breadth of 193 denier.
(2) Preparation of second resin yarn
4.0 parts by weight of amorphous silica, 8.2 parts by weight of piperonyl butoxide, 2.6 parts by weight of zinc stearate , and 0.1 part by weight of BHT were mixed by stirring, then, 15.2 parts by weight of linear low density polyethylene and 70.0 parts by weight of high density polyethylene were added, and the mixture was melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. Next, 50.0 parts by weight of the resultant pellets and 50.0 parts by weight of high density polyethylene were melt-kneaded. From the resultant mixture, a second resin yarn was spun at a process temperature of
2000C. The second resin yarn was a monofilament, and had a breadth of 203 denier.
(3) Fabrication of net
The first resin yarn and the second resin yarn were used as warp, the first resin yarn was used as weft, and the warp and the weft were woven to fabricate a net. The warps were placed at a distance of about 2.5 mm. The wefts were placed at a distance of about 4.0 mm. For the warp, a cycle of continuous placing of three second resin yarns and placing of one first resin yarn was repeated. [Fourth Example] The insect pest controlling net of this example has a woven structure, and was fabricated as described below.
(1) Preparation of first resin yarn
4.0 parts by weight of amorphous silica, 8.2 parts by weight of permethrin, 2.6 parts by weight of zinc stearate , and 0.1 part by weight of BHT were mixed by stirring, then, 15.2 parts by weight of linear low density polyethylene and 70.0 parts by weight of high density polyethylene were added, and the mixture was melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. Next, 50.0 parts by weight of the resultant pellets and 50.0 parts by weight of high density polyethylene were melt-kneaded. From the resultant mixture, a first resin yarn was spun at a process temperature of 200°C. The first resin yarn was a monofilament, and had a breadth of 193 denier.
(2) Preparation of second resin yarn
4.1 parts by weight of amorphous silica, 4.2 parts by weight of piperonyl butoxide, 2.6 parts by weight of zinc stearate , and 0.1 part by weight of BHT were mixed by stirring, then, 15.5 parts by weight of linear low density polyethylene and 73.5 parts by weight of high density polyethylene were added, and the mixture was melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. Next, 50.0 parts by weight of the resultant pellets and 50.0 parts by weight of high density polyethylene were melt-kneaded. From the resultant mixture, a second resin yarn was spun at a process temperature of 200°C. The second resin yarn was a monofilament, and had a breadth in the range of 188 to 198 denier.
(3) Fabrication of net
The first resin yarn and the second resin yarn were used as warp, the first resin yarn was used as weft, and the warp and the weft were woven to fabricate a net. The warps were placed at a distance of about 2.5 mm. The wefts were placed at a distance of about 4.0 mm. For the warp, a cycle of continuous placing of three second resin yarns and placing of one first resin yarn was repeated. [Fifth Example]
The insect pest controlling net of this example has a knitted structure shown in Fig. 1, and was fabricated as described below.
(1) Preparation of first resin yarn 1 4.0 parts by weight of amorphous silica, 8.2 parts by weight of permethrin, 2.6 parts by weight of zinc stearate , and 0.1 part by weight of BHT were mixed by stirring, then, 85.1 parts by weight of polyethylene was added, and the mixture was melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. Next, 50.0 parts by weight of the resultant pellets and 50.0 parts by weight of polyethylene were melt-kneaded. From the resultant mixture, a first resin yarn was spun at a process temperature of 2000C. The first resin yarn was a monofilament, and had a breadth of 195 denier. (2) Preparation of second resin yarn 2
4.0 parts by weight of amorphous silica, 8.2 parts by weight of piperonyl butoxide, 2.6 parts by weight of zinc stearate , and 0.1 part by weight of BHT were mixed by stirring, then, 85.1 parts by weight of polyethylene was added, and the mixture was melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. Next, 50.0 parts by weight of the resultant pellets and 50.0 parts by weight of polyethylene were melt-kneaded. From the resultant mixture, a second resin yarn was spun at a process temperature of
200°C. The second resin yarn was a monofilament, and had a breadth of 197 denier. (3) Fabrication of net The first resin yarn and the second resin yarn were used together as warp and alternately, and these were knitted to fabricate a net. The size of a mesh 3 was set so that Ll was about 2 nun and Wl was about 2.5 mm. [First Comparative Example]
The insect pest controlling net of this comparative example has a knitted structure shown in Fig. 1, and was fabricated as described below.
(1) Preparation of first resin yarn 1 4.0 parts by weight of amorphous silica, 4.1 parts by weight of permethrin, 4.1 parts by weight of piperonyl butoxide, 2.6 parts by weight of zinc stearate , and 0.1 part by weight of BHT were mixed by stirring, then, 85.1 parts by weight of polyethylene was added, and the mixture was melt-kneaded by using a single screw extruder. From the resultant mixture, pellets in the form of circular cylinder were molded. Next, 50.0 parts by weight of the resultant pellets and 50.0 parts by weight of polyethylene were melt-kneaded. From the resultant mixture, a first resin yarn was spun at a process temperature of 200°C. The first resin yarn was a monofilament, and had a breadth of 194 denier.
(2) Preparation of second resin yarn 2
The first resin yarn was used as the second resin yarn. (3) Fabrication of net The first resin yarn 1 and the second resin yarn 2 were used together as warp and alternately, and these were knitted to fabricate a net. The size of a mesh 3 was set so that Ll was about 2 mm and Wl was about 2.5 mm. [Test 1]
(Test sample)
The insect pest controlling nets of the third Example and the fourth Example were used as samples. The sample was fabricated as described below. That is, warp and weft were placed on the surface of a metal plate in the form of approximate square of 5 cm x 5 cm. In this procedure, the size of a part (net part) of crossing of warp and weft was set to about 2.5 cm x 2.5 cm. (Test Method) First, the sample was stored on the surface of the above-described metal plate at 300C for 48 hours, then, placed on another horizontal plane. On the sample, a petri dish having a diameter of about 4 cm was covered. Next, 10 female adult insects of Aedes aegypti were released in the petri dish, and left for 3 minutes, then, released in another cage. The number of female adult insects of Aedes aegypti knocked down in a certain time was counted, and from the result, the time until knock down of 50% of female adult insects of Aedes aegypti (KT50 value) was calculated. (Result) The KT5O value in the case of use of the sample of the third Example was 5.5 minutes. The KT5O value in the case of use of the sample of the fourth Example was 13 minutes. [Test 2] (Test sample)
The insect pest controlling nets of the fifth Example and the first Comparative Example were used as samples.
That is, the net was cut into a size of 10 cm x 10 cm and used as the sample. (Test Method)
First, the sample was washed with 200 ml of acetone, and stored in a temperature-controlled bath of 70°C for 2 hours, then, fixed on a plane. On the sample, a petri dish having a diameter of about 4 cm was covered. Next, 10 female adult insects of Culex quinquefasciatus were released in the petri dish, and left for 3 minutes, then, released in another cage. The number of female adult insects of Culex quinquefasciatus knocked down in a certain time was counted, and the number of dead female adult insects of Culex quinquefasciatus was counted. (Result)
In the case of use of the sample of the fifth Example, the knock down ratio was 100%, and the death ratio was 90%. In the case of use of the sample of the first Comparative Example, the knock down ratio was 70%, and the death ratio was 53% .
Industrial Applicability
The insect pest controlling net of the present invention can be produced at low cost, and additionally, is capable of manifesting a satisfactory strong insecticidal effect, thus, its industrial utilization value is large.

Claims

1. An insect pest controlling net formed by knitting or weaving a resin yarn so as to form a lot of meshes, wherein a first resin yarn and a second resin yarn are used together as the resin yarn, the first resin yarn contains an insecticide component, and the second resin yarn contains a synergist component.
2. The insect pest controlling net according to Claim 1, wherein each mesh is constituted of the first resin yarn and the second resin yarn.
3. The insect pest controlling net according to Claim 1, wherein the insecticide component is kneaded in the first resin yarn.
4. The insect pest controlling net according to Claim 1, wherein the synergist component is kneaded in the second resin yarn.
5. The insect pest controlling net according to Claim 1, wherein the insecticide component is coated on the surface of the first resin yarn.
6. The insect pest controlling net according to Claim 1, wherein the synergist component is coated on the surface of the second resin yarn.
7. The insect pest controlling net according to Claim 1, wherein the insecticide component is a pyrethroid compound .
8. The insect pest controlling net according to Claim 1, wherein the synergist component is piperonyl butoxide .
9. The insect pest controlling net according to Claim 1, wherein the first resin yarn and/or the second resin yarn is composed of polyethylene.
10. The insect pest controlling net according to Claim 1, wherein the first resin yarn and/or the second resin yarn is a monofilament.
PCT/JP2009/063979 2008-08-06 2009-07-31 Insect pest controlling net Ceased WO2010016561A2 (en)

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