摘要： 皱夜蛾（Agrotis corticea Schiffermuller）在呼和浩特小井地区每年发生1代，以大龄幼虫于土中越冬。初步查明寄主植物有12科23种，在栽培作物中主要为害蚕豆，蚕豆幼苗2-3片叶时受害最重。幼虫共6龄，个别达7龄。皱夜蛾始见于1979年乌兰察布盟察右中旗点红岱大队和呼和浩特郊区小井公社的蚕豆田内，为害幼苗较重，是大青山山区等地蚕豆上的主要害虫之一。为此，我们在小井公社对此虫的生物学特性做了初步观察和研究，现将结果报导如下。

关键词: 皱夜蛾, 形态特征, 生活习惯

Abstract: Agrotis corticea Schiffermuller occurs one generation a year in Xiaojin area .Huhehot.The big instar larvae liveo through winter in soil.It has been preliminarily found out that the host plants of A.corticea S.have 23 species belonging to 12 families.It mainly infests broad bean in cultivated plants.Broad bean in the stage of 2-6 leaves is most seriously damaged by the larvae.The larva has 6 instars at all and very few reach to 7th instars.