不同农药对欧洲玉米螟赤眼蜂的影响

Effects of Different Pesticides on Adults,Larvae,Eggs,and Pupae of Trichogramma nubilale

测定了5种药剂对欧洲玉米螟赤眼蜂成蜂、卵至蛹期的毒性。结果表明:所有供试药剂对赤眼蜂成蜂都有一定的风险,其中三唑磷和啶虫脒对赤眼蜂成蜂属极高风险性,三唑磷影响最大;霉灵、甲氨基阿维菌素苯甲酸盐和茚虫威对赤眼蜂卵至蛹期较为安全。欧洲玉米螟赤眼蜂成蜂对大多数农药非常敏感,卵至蛹期由于在寄主卵内度过,因而对杀虫剂的敏感程度有所下降。

The effects of 5 pesticides on adults, eggs, larve and pupae of Trichogramma nubilale were compared. Results showed that all the 5 pesticides were toxic to adults of T. nubilale, in which triazophos and acetamiprid were most toxic. Hymexazol, emamectin benzoate and indoxacarb were safe to other four stages of T. nubilale, while triazophos and acetamiprid were toxic, of which triazophos was the most toxic. In overall, the adults of T. nubilale are more sensitive to most pesticides, and the sensitiveness of the other four stages to pesticides is decline because of the protection of host chorion.