为了解楸梢螟的生活史及习性,于1983—1984年,我们在大梁口村楸树丰产体内设点进行了观察,现将结果初报如下。 一、生活史 多数一年二代,少数一代。以老幼虫在枝条内越冬。翌年4月中旬开始化蛹至4月下旬,化蛹率为25.8%,5月上旬达69.4%,并进人化蛹高峰期,5月中旬化蛹结束。越冬代蛹期为18—25天(18天羽化的占3.57%,19天的占14.28%,20天 In order to understand the life history and habits of catfish perch species, in 1983-1984, we observed the establishment of high yield body in Catalpa bungei trees. The results are as follows. First, the history of life Most of the second generation a year, a handful of generations. The old larvae winters in the branches. From mid-April of the following year, pupation was started to late April. The pupation rate was 25.8%, reaching 69.4% in early May and entering the peak period of pupation, and the end of pupation in mid-May. Overwintering pupal stage for 18-25 days (18 days feather accounted for 3.57%, 19 days accounted for 14.28%, 20 days