我县地处苏北沿海,是全国优质棉基地县之一。随着耕作制度的演变,棉田玉米螟已上升为主要害虫,危害损失超过其它钻蛀性害虫,一九八八年由于气候条件适宜,局部地区大发生,三代铃害率平均3%,重发田块高达25.5%,严重影响了棉花的产量和品质。 My county is located in northern Jiangsu coast, is one of the high-quality cotton base counties. With the tillage system evolving, the cotton field corn borer has risen as the major pest and harms more than other borers. Due to the favorable climatic conditions in 1988 and large areas, the third generation boll damage rate averaged 3% Field up to 25.5%, seriously affecting the yield and quality of cotton.