一、虫害特征及病害症状(一)粘虫。幼虫体长可达38毫米,体色变化较大,体表有许多纵条纹,背中线白色较细,两边各有两条黄褐色至黑色细线,幼虫为害玉米叶片,严重时将整株叶片吃光,仅剩叶脉。(二)玉米螟。幼虫身体乳白色,半透明薄膜状或出现排列整齐的小圆孔,后期钻蛀茎秆、穗部为 First, pest characteristics and symptoms of disease (a) armyworm. Larvae body length up to 38 mm, body color changes, the body surface has many vertical stripes, the back of the line white thin, each on both sides of the two brown to black fine lines, larvae damage maize leaves, serious when the whole plant leaves Eaten, leaving only veins. (B) corn borer. Larvae body milky white, translucent film or appear neatly arranged small round hole, the late drill moth stalk, spike