二点委夜蛾形态特征的初步观察

Preliminary observations on the morphological characteristics of Athelis lepigone

对二点委夜蛾Athelis lepigone(Moschler)各虫态的外部结构和细微特征进行了系统观察。区分了成虫、蛹的雌雄特征,对成虫足、翅脉结构、幼虫头部、腹足等做了详细描述。该虫成虫和幼虫的主要鉴别特征:翅灰褐色,前翅3条黑褐色的横线呈波浪状,中剑纹为黑色三角形或菱形斑,肾形斑由黑点组成边缘,外侧中凹有白点;幼虫颅侧区有倒"八"字形暗褐色斑纹。腹背具"V"字纹,亚背线深褐色具灰白色边缘。

Athetis lepigone（Moschler） （Noctuidae,Lepidoptera） has in recent years become a serious pest of the corn seedling stage.We here describe the morphology of all stages of this pest and compare male and female characteristics of adults and pupae.The main characteristics of adults include mottled gray and brown forewings,usually with a black sword stripe and light colored kidney-shaped spot.Full-grown larva are characterized by an inverted Chinese eight-shaped are on the head parietalie,＂V＂ stripes on the mid-dorsal line of each abdominal segment and two dark brown sub-dorsal bands with a white edge.