杨扇舟蛾主要为害杨、柳树叶,近年来危害相当严重,有的整片林地树叶被吃光,形成“夏树冬景”,影响树木的正常生长发育及绿化工程形象。因此,全面掌握杨扇舟蛾对森林资源的危害情况及其发生、传播扩散规律,才能进行科学有效的防治。一、生物学特性该虫每年发生4～5代,成虫在地面 Yang Fan moth damage mainly Yang, willow leaves, in recent years, the damage is quite serious, and some whole piece of woodland leaves are eaten, forming a “summer tree winter landscape”, affecting the normal growth and development of trees and greening project image. Therefore, it is necessary to conduct a scientific and effective prevention and control before we can fully grasp the harms of the wood-borne moths on forest resources and their occurrence and spread and diffusion. First, the biological characteristics of the pest 4 to 5 generations occur each year, adults in the ground