两种烟熏剂对设施蔬菜上烟粉虱及海氏桨角蚜小蜂(Eretmocerus hayati)的毒力测定

The Virulence of Two Fumigants to the Bemecia tabaci and Eretmocerus hayati in the Protected Vegetable

【目的】比较烟熏剂对MED烟粉虱隐种及其优势寄生蜂海氏桨角蚜小蜂(Eretmocerus hayati)的毒力,为推广烟熏剂的使用及对天敌的保护利用提供理论依据。【方法】采用室内模拟熏蒸和温室大棚熏蒸法进行毒力测定。【结果】两种烟熏剂对海氏桨角蚜小蜂的毒力显著高于对MED烟粉虱隐种的毒力,但两种药剂之间并无显著性差异,并且实验所用的两种方法之间也无显著性差异;温室熏蒸实验得出海氏桨角蚜小蜂的校正虫口减退率达到了100%。【结论】烟熏剂对MED烟粉虱隐种和海氏桨角蚜小蜂均有很强的毒副作用,不利于对烟粉虱的优势寄生蜂海氏桨角蚜小蜂的保护与利用。

[Objective] By comparing fumigants virulence to Semetia MED cryptic species and thedominant parasitoid wasp Eretmocerus hayati, this paper aims at providing a theoretical basis for better use of fumigant and protection and utilization of natural enemy.[Method] In this paper, indoor simulated fumigation and greenhouse fumigation were used for testing.[Result ] The results of simulated fumigation experiment showed that the virulence of two fumigants to Eretmocerus hayati was significantly higher than that to Bemecia tabaci MED cryptic species, but there was no significant difference between the two drugs, and no significant difference between two testing methods; Results of the greenhouse fumigation test exhibited that after the third fumigation, the revision insects reduced rate of Eretmocerus hayati reached 100% , although the number of Be- TTiecfa MED cryptic species was significantly reduced.[Conclusion] Although fumigant has a strong vir-ulence effect on both Bemecia tabaci MED cryptic species and Eretmocerus hayati, due to the strong side effects, the use of fumigant is not conducive to the protection and utilization of Bemecia tabaci dominant para-sitoid wasp Eretmocerus hayati.