二点委夜蛾是一种生态型玉米新害虫,十年来我国大力推广的小麦秸秆还田和玉米免耕播种为二点委夜蛾创造了适宜的生态环境和充足的食物来源,使二点委夜蛾得到迅速积累,发生面积不断扩大,发生程度日益严重。2011年该虫在黄淮海夏玉米区暴发成灾,引起国家和农业部高度重视,将二点委夜蛾列入重大病虫害,进行密切监测和科学防控。二点委夜蛾主要是以第二代幼虫危害夏玉米幼苗,玉米2叶期前可咬断嫩茎造成单株死 Two-point litura is an ecotype of new pests of corn, ten years of our country to promote the wheat straw and field no-tillage sowing for the two members of the night worm to create a suitable ecological environment and adequate food sources, so that two points Spodoptera get rapid accumulation, the area continues to expand, the degree of occurrence is increasingly serious. In 2011, the insects broke out in the Huang-Huai-Hai summer maize area, causing great attention from the state and the Ministry of Agriculture. The two-spotted vermin were included in major pests and diseases and were closely monitored and scientifically prevented and controlled. Two-stage members of the night-stage moths are mainly second-generation larvae of summer maize seedlings threatened to seize the tender stems of maize 2 leaves before the plant died