每年夏秋之际是林木食叶害虫为害最猖撅的时期。害虫发生周期短、虫口密度高、食叶量大、危害十分严重,可将树叶吃得精光,使之因丧失光合作用能力而停止生长甚至枯死。据调查,阔叶林木的食叶害虫主要有刺蛾(黄刺蛾、绿刺蛾、扁刺蛾)、舟蛾(扇舟蛾、小舟蛾、分月扇舟蛾)、黄卷叶螟。这些害虫夏季进入老熟幼虫期,部分开始化蛹, Each summer and autumn is the most damaging period of forest leaf pests. Pest occurrence cycle is short, insect population density, leaf mass, the damage is very serious, can eat the leaves of the essence, so that due to the loss of photosynthesis ability to stop growing or even dead. According to the survey, broad-leaved forest leaf insects are mainly the larvae (yellow thorn moth, green moth, flat moths), moths (finches moths, small moths, sub-monthly marine moth), yellow leaf roller. These pests into the mature larvae stage summer, part of the pupation began,