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苏云金杆菌(Bt)杀虫剂在棉铃虫综合治理中已广泛应用,但关于Bt杀虫剂对棉铃虫的作用机理尚无系统研究。Bt杀虫剂是胃毒剂,昆虫取食作用对其杀虫效果有重要影响。已有研究表明,Bt杀虫剂对某些昆虫有抑制取食的作用,对另一些昆虫无此作用。作者初步研究了不同剂量的Bt杀虫剂对棉铃虫取食行为和生长的影响,结果报道如下。 1 材料与方法
Bacillus thuringiensis (Bt) insecticides have been widely used in the comprehensive management of cotton bollworm, but there is no systematic study on the mechanism of Bt insecticide on cotton bollworm. Bt insecticide is a stomach poison, the insecticidal effect of insecticide has a significant impact. It has been reported that Bt insecticides have the effect of inhibiting feeding on some insects and not on other insects. The authors initially studied the effects of different doses of Bt insecticides on feeding behavior and growth of cotton bollworm, the results reported below. 1 materials and methods