玉米青虫属夜蛾属夜蛾科,学名Laphygma exigna Hubner。在六安地区一年发生三代,以蛹在土中越冬,第二年4月間化蛹,5月上旬羽化,第一代幼虫在5月中、下旬为害春玉米,第二代幼虫在6月下旬至7月上旬为害夏玉米,第三代幼虫在8月上旬为害秋玉米(麻茬玉米)。卵期一般为四至五天,幼虫期十五天左右,蛹期七至八天,从卵到化蛾完成一代約需一个月时間。成虫多产卵于玉米叶的背面,幼虫畏光,多早晚为害,初龄幼虫喜群集在心叶或叶背为害,取食叶之下表皮及叶肉組織,被害叶残留上表皮,初呈白色,后变焦黄;老龄幼虫則食叶面,仅留叶脉,一般被害叶被吃成許多长形裂缝,严重时全叶吃成碎片。1963年六安地区玉 Cornworm is a member of the family of Plasmodium, the Laphygma exigna Hubner. In Li’an, three generations occur in one year, with pupa overwintering in the soil, pupae in April of the second year and eclosion in early May. The first-generation larvae harmed spring maize in mid- and late May, and the second-generation larvae in June Harvest summer maize from late to early July, the third generation larvae infestation autumn corn (Ma stubble corn) in early August. The egg period is generally four to five days, the larval period is about fifteen days, and the pupal period is seven to eight days. It takes about a month to complete a generation from egg to moth. Adult spawning on the back of corn leaves, the larvae photophobia, more morning damage, the first instar larvae hi clusters in the heart or leaf back damage, take the epidermis and leaf tissue under the leaves, the victim leaves remain on the epidermis, initially white, After the zoom yellow; aging larvae eat foliar, leaving only the veins, the general victim leaves were eaten into many long cracks, severe whole leaf eaten into pieces. 1963 Luan area jade