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40％杀灭菊酯、2.5％溴氰菊酯对荔蝽平腹小蜂成虫的LC_(30)分别为24.1×10~(-6)和35.41×10~(-6)。本试验分别取20×10~(-6)杀灭菊酯和35×10~(-6)溴氰菊酯作为亚致死剂量,对成蜂进行处理,结果表明其寿命缩短、寄生率下降。经t测验,与对照的差异极显著(1≥0.01)。用这2种农药的田间推荐使用浓度对荔蝽平腹小蜂的卵期、幼虫期、预蛹期及蛹期处理结果,最高死亡率不超过10％。因此当释放平腹小蜂的果园需要用药防治其它害虫时,可以选择使用这类农药,但要注意农药的残效作用对成蜂的影响,尽量选择平腹小蜂发育的前期喷药比较安全。
The LC_ (30) of 40% fenvalerate and 2.5% deltamethrin were 24.1 × 10 ~ (-6) and 35.41 × 10 ~ (-6), respectively. In this experiment, 20 × 10 -6 (-6) fenvalerate and 35 × 10 -6 (-6) deltamethrin were respectively taken as sublethal doses to deal with adult bees. The results showed that their life span was shortened and the parasitism rate was decreased. After t test, the difference with the control was extremely significant (1≥0.01). The recommended concentration of these two kinds of pesticides in the fields of eggs, larvae, pre-pupal and pupal treatment of Bemisia tabaci did not exceed 10%. Therefore, when the release of Bombus smallpox orchards need medication to control other pests, you can choose to use these types of pesticides, but pay attention to the effect of residual pesticides on the bees, try to choose the development of pre-Bombes insecticide relatively safe.