桑梢小蠹虫(Cryphalus exignus Bland fond)属鞘翘目,小蠹虫科,是桑树害虫之一,国内有桑之地皆有分布。日本及我国解放前后,对此虫的外部形态、生活习性及防治方法均有简单论述,但对生产中的实际问题未见报道。据我所调查,该虫为害严重年份桑叶减产约40%。为了掌握桑梢小蠹虫的发生及危害规律,提高防治措施效果,我们进行了调查研究。 Crytus bark beetle (Cryphalus exignus Bland fond) is a sheath of the head, beetles insects, mulberry is one of the pests, there are mulberry fields are distributed. Before and after the liberation of Japan and our country, there was a brief exposition of the external shape, living habits and methods of prevention and control of the insects. However, there was no report about the actual problems in the production. According to my survey, the pest damage mulberry leaves in severe years about 40% reduction. In order to grasp the occurrence and harm of mulberry bark beetles and improve the effect of control measures, we conducted a survey.