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用敌杀死与Bt两种药剂防治马尾松毛虫后 ,对其蛹期寄生天敌寄生情况作了调查。结果表明 ,两种药剂对蛹期寄生天敌影响差异明显。敌杀死化学农药防治马尾松毛虫后蛹期寄生天敌寄生率为 2 5 .1 % ,而Bt生物农药防治 ,其蛹期寄生天敌寄生率则高达 6 4 .1 %。
After the enemy kill and Bt two kinds of medicaments to prevent and control the masson pine caterpillar, parasitic natural enemies of their parasitoid pupal stage were investigated. The results showed that there were significant differences between the two agents on the parasitoid natural enemies at pupal stage. The kill rate of parasitic natural enemies of pupal parasitoid was 25.1% when the chemical pesticides were killed by chemical pesticides, and the parasitic rate of parasitoids at pupal stage was as high as 64.1%.