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malaise trap
A Malaise trap is a large, tent-like structure used for trapping flying insects, particularly Hymenoptera and Diptera. The trap is made of a material such as terylene netting and can be various colours. Insects fly into the tent wall and are funnelled into a collecting vessel attached to highest point. It was invented by René Malaise in 1934.〔Malaise, Rene. 1937. A new insect-trap. Entomologisk Tidskrift, Stockholm. 58: 148—60, figs.〕
==Structure==
There are many versions of the Malaise trap, but the basic structure consists of a tent with a large opening at the bottom for insects to fly into and a tall central wall that directs the flying insects upwards to a cylinder containing a killing agent.〔Mississippi Entomological Museum. 2006. (Malaise Traps ). Mississippi State University.〕 The chemicals vary according to purpose and access. Conventionally, cyanide was used inside the jar with an absorbent material.〔Gressitt ''et al.'' (1962)〕 However, due to restrictions, many people use ethanol. Ethanol will damage some flying insects like Lepidopterans, but most people use the malaise trap primarily for Hymenopterans and Dipterans. In addition, the ethanol will keep the specimens preserved for a longer period of time. Other dry killing agents include no-pest strips (vapona) and ethyl acetate and need to be checked more regularly.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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