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Bottle trap is a name used for several different objects. Among these are a piece of material used in bathroom plumbing, as well as various traps that are made out of discarded bottles and which are used to trap animals as different as beetles, mice, fish and octopuses. This article is about the use of modified bottles to trap flying insects. In this context, a bottle trap is a type of baited arboreal insect trap for collecting either prized or harmful frugivorous beetles, especially flower beetles,〔()〕〔 leaf chafers and longhorn beetles〔 as well as wasps〔 and other unwanted flying insects. ==Structure== A bottle trap is an insect trap made out of a plastic bottle. Most collectors use bottles of 1.5 or 2 liters to make these traps but smaller bottles are sometimes used as well.〔()〕 There are basically two types: *Funnel type. These bottle traps are made by cutting off the neck of the bottle as well as the complete tapering part of the top. The neck and cap are discarded. For catching wasps only the cap is removed, while leaving the neck in place. The tapering part is placed upside down on top of the rest of the bottle, thereby effectively forming a funnel. This funnel is then fixed to the bottle by piercing both bottle and funnel at two opposing sides. A wire fitted through these holes ensures the funnel solidly fits on the bottle, while the trap can easily be opened when required. After putting the bait in the bottle the trap is placed at the desired location. * *Advantages: * * *Insects can't escape from this type of trap, since they fly up along the side of the bottle, not finding the exit, which is in the middle. * * *Bats and large moths can't enter the trap, since they are too large to fit through the funnel. * * *This type can, unlike the other kind, also be used to collect troublesome wasps * *Disadvantages: * * *Not only insects but also rain will funnel into the trap. This trap is therefore normally only used in dry seasons. * * *This construction requires a bit more work than the side door type. *Side-door type. A side-door bottle trap consists of a bottle with cap of which the higher end of one upright side is cut open. A simple rectangular shape is cut out, taking care that it stays attached to the bottle on its upside. This plastic flap is then bend upward, effectively forming a rain shield over the entrance.〔 After adding some bait the trap is put in its place. * *Advantages: * * *Because of its opening with rain shield very little rain enters the trap, making it effective in wet seasons too. * * *Construction is very simple and requires no additional materials. * *Disadvantages: * * *The wider opening allows for small bats and large moths to enter. These may die in the trap and pollute it, as well as forming, with their wings, a bridge to the exit. * * *Captured beetles may escape again since they may simply fly upward along the side of the bottle. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bottle trap for insects」の詳細全文を読む スポンサード リンク
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