近年来，由于棉铃虫的猖獗危害，致使棉花产量低、品质差、收益少，广大棉农植棉积极性受到严重挫伤，很多棉农惧怕棉铃虫治不下去而不愿再种棉花。据有关专家分析，认为当前棉铃虫大发生的主要原因，一是长期单一使用化学农药，导致棉铃虫本身抗药性能增强厂是近几年冬季气温 In recent years, cotton bollworm rampant harm, resulting in low cotton yield, poor quality, less return, the enthusiasm of the vast number of cotton farmers severely dampened, many cotton farmers fear not to rule cotton bolls and do not want to re-cotton. According to experts, the main reason for the current occurrence of cotton bollworm, one long-term use of chemical pesticides alone, resulting in increased resistance to cotton bollworm itself plant in recent years, the winter temperature