玉米螟又称玉米钻心虫，以幼虫蛀食玉米心叶、茎秆及雌雄德，是为害玉米的大害虫。玉米螟在我省一般每年发生三代，第一代幼虫6月中下旬为害青玉米已动叶期），第二代幼虫7月中下旬为害夏玉米（心叶期）和春玉米（德期），第三代幼虫8月中下旬为害夏玉米秸及茎部。在春玉米种植 Corn borer, also known as corn borer, larvae eating corn heart leaves, stalks and male and female, is harmful to corn pests. Corn borer in our province generally occur three generations a year, the first generation of larvae in mid-to late June damaged corn has been moving leaf stage), the second generation of larvae in mid-late July damage summer maize (leaf period) and spring corn (German period) The third generation larvae infestation summer corn stalks and stems in late August. Planting in spring corn