棉铃虫是棉花蕾、铃期的主要害虫,我省一年发生四个世代,以第二代危害最重。长期用化学农药防治,棉铃虫的抗性增强,有益天敌被杀伤,又由于耕作制度的改革,对其发生发展有利,以致年年发生,更趋猖獗,防治费用增加,生产成本提高。 Cotton bollworm is a cotton bud, the main pest of the bell, the province occurs four generations a year, the second generation of the most damaging. Long-term use of chemical pesticides to prevent and control, the resistance of cotton bollworm increased, beneficial natural enemies were killed, but also because of farming system reform, its occurrence and development of benefit, resulting in annual occurrence, more rampant, prevention and control costs increase, the cost of production increased.