邓林地区地处鄂北岗地丘陵地带 ,1991年引种杂交高粱 ,1993年后种植面积逐年扩大 ,为本地区主要秋季粮食作物。 1995～ 1998年玉米螟在杂交高粱上大发生 ,单穗虫量达 15头以上 ,一般减产30 % ,严重的高达 6 0 %以上。1993年以前 ,玉米螟在邓林地区一年发生 2代 ,第 1代幼虫危害 Denglin area is located in hilly area of ​​northern Hubei, 1991, the introduction of hybrid sorghum, planting area after 1993 expanded year by year, the region’s main autumn food crops. Corn borer occurred on hybrid sorghum from 1995 to 1998, the number of single earworm reached 15, the general reduction of 30%, serious as high as 60%. Before 1993, corn borer occurred in Denglin area for two generations a year, the first generation of larvae