1.栎粉丹蛾栎粉丹蛾俗称罗锅虫、气虫等,在我省各蚕区均有发生.其幼虫主要为害辽东柞、蒙古柞和尖柞树叶,在秋蚕期为害最为严重.栎粉丹蛾的幼虫7月下旬开始孵化,8月上中旬为孵化盛期,幼虫共6龄.初孵化的幼虫体小,在柞叶背面为害,往往不被人们注意.4龄后食叶量大增,5龄进入暴食期,至9月以前仍在为害.栎粉丹蛾幼虫的微粒子病还可与柞蚕幼虫发生交叉感 1. Quercus mongolica Quercus mongolica Dan moth, commonly known as the loofah, arachnids, etc., in our province silkworm area have occurred.The larvae of the main damage Liaodong oak, Mongolia oak and poinsettia leaves, the most harmful in autumn silkworm. The larvae of C. dorsalis begin to hatch in late July, and hatch in mid-August, with 6 larvae. The newly hatched larvae are small and often harmless on the back of oak leaves, and are often unnoticed. Increased significantly, the 5th instar into the gluttony, is still in damage until September .Petroecium powder moth larvae microparticles disease can also be cross-sensation with tussah larvae