大剑纹夜蛾Apatela major Bremer又名桑夜蛾,是香椿树后期的重要食叶害虫,常将树叶食光,削弱树势影响生长发育。山西省祁县一带历年均受此虫为害,使香椿的产量与品质受到很大影响。据了解和观察,此虫只为害香椿。 一、形态特征 成虫 体长24—27毫米,翅展50—55毫米,灰色微褐,腹面灰白色。触角丝状。前翅剑纹黑色,基剑纹树枝状,端剑纹两条;环纹灰白 Apatela major Bremer, also known as the moth, is an important foliar pest of the late toon tree, which often eats the leaves and weakens the tree vigor and affects growth and development. Qixian County in Shanxi Province over the years are subject to pest damage, so that Toon yield and quality are greatly affected. It is understood and observed that this worm is only harmful toon. First, morphological characteristics Adult body length 24-27 mm, wingspan 50-55 mm, gray slightly brown, ventral gray. Antenna filiform. Pre-wings black sword, based sword-shaped dendritic, end sword two; ring gray