夜间收集小型趋光性昆虫的新方法

摘要

传统的灯诱方法在夜间收集小型昆虫比较麻烦,尤其是体软的蜉蝣目、脉翅目、双翅目昆虫,电击死亡后堆积在一起很难分开,严重影响标本的质量.为此,介绍一种方便收集小型趋光性昆虫的方法.即用3根原木撑起白布,白布前挂一排黄板,开灯前黄板刷上机油,开灯后趋光性小型昆虫飞落在黄板上,机油的黏性使其紧紧粘在黄板上无法挣脱,挣扎幅度很小,虫体不受损.大型昆虫一般不落到黄板上,黄板表面基本干净无污染,小型昆虫均匀粘在黄板上,完整性好,方便收集者观察取样.收集时用毛笔轻轻扫下目标昆虫,保存在75%乙醇中即可.黄板上重新刷上机油可重复使用.该方法操作简单,使用的材料均无毒性,对人安全,对环境无污染.%The traditional method of light trap to collect smaller size insects at night had too much trouble. The soft-body insects of Ephemeroptera, Neuroptera and Diptera stacked together after shock death,which was difficult to separate and seriously affected the quality of specimens. A convenient and efficient collection method was presented here to solve the problem. Three logs prop a white cloth and a row of yellow traps were hung before the white cloth. Brush oil to the yellow traps before the black-light lamp was turned open. Smaller size phototaxis insects fall down the yellow traps and were firmly stuck on them because of oil viscosity. The bodies were not damaged as struggling only slightly. The larger insects generally did not fall down the yellow traps, so the surface could always keep clean and pollution-free. The smaller size insects were evenly distributed on the yellow traps which were of good integrity, very convenient for observation and collection. A brush was used to gently sweep the target insects and preserve them in 75 ％ alcohol. The yellow traps could be re-brushed with oil to reuse the equipment. The procedure was simple, and all of the materials used were non-toxic and friendly for environment.