辽宁省朝阳市,位于北纬40°20′—42°20′,东经118°50′—121°20′,为古长城外高寒棉区。棉花上棉铃虫年年发生,1992年发生特别严重,全市54万亩棉田全部发生。百株棉花有棉铃虫幼虫200头以上,蕾铃受害严重,虽经大力防治尚损失30—40%,其它作物如高粱、玉米、谷子、芝麻、花生、向日葵、番茄、菜豆、茄子等也严重受害。从近些年本市棉铃虫的发生情况,我们 Chaoyang City, Liaoning Province, located at latitude 40 ° 20’-42 ° 20 ’and longitude 118 ° 50’-121 ° 20’E, are the outer cotton areas of the ancient Great Wall. Cotton bollworm occurs annually, especially serious in 1992, with 54,000 mu of cotton fields in the city all occurring. There are more than 200 cotton bollworm larvae with more than 200 bolls. The bollworms are severely damaged. Although 30-40% of the bollworm is damaged, other crops such as sorghum, corn, millet, sesame, peanut, sunflower, tomato, kidney bean and eggplant are also serious Victims. From the occurrence of cotton bollworm in our city in recent years, we