杨干象Cryptorrhynchus Lapathi L.是为害杨柳枝干的检疫性害虫,国内分布于东北、华北、西北部分地区,近年来它对杨树的为害日趋严重,疫区面积日趋扩大,随着苗木的调运进行远距离传播;在春季苗木调运时期,杨干象处于卵、初孵幼虫时期,隐藏于苗木表皮下不易发现,自1985年我们在沈阳地区部分苗圃和新植林进行了实地检验。 Cryptorrhynchus Lapathi L. is a quarantine pest that will damage the willow branches. It is distributed in the northeast, north China and northwestern parts of China. In recent years, its damage to poplar is becoming more and more serious. The area of ​​the epidemic area is expanding day by day. Distance propagation; in the spring seedling transport period, Yang dry as eggs, newly hatched larvae, hidden in the seedling epidermis is not easy to find, since 1985, we conducted some field tests in some nurseries and new plantations in Shenyang.