摘要： 在实验室条件下, 评价了不同寄主粉虱及不同寄主植物对丽蚜小蜂产卵选择性及寄生能力的影响。结果表明, 当烟粉虱和温室粉虱同时存在时, 丽蚜小蜂喜欢寄生温室粉虱, 温室粉虱上的寄生率显著高于烟粉虱的寄生率; 当供试寄主仅为烟粉虱, 在4种寄主植物同时存在时, 丽蚜小蜂寄生烟粉虱能力在寄主植物间存在显著差异, 寄生率从高到低的顺序为: 烟草> 甘蓝> 棉花> 黄瓜。

关键词: 丽蚜小蜂, 温室粉虱, 烟粉虱, 寄生能力

Abstract: Preference of the Emxzrsia formasa for two species of whitefly, Bemisia tabaci and Trialeurodes vcagra-araorum, and its parasitic potentials to nymoh of B.tabaci infesting dffferent crops were assessed in the laboratory. Results showed that when tobacco whitefly cofxisited with greenhouse whitefly, the parasitoid prefened to parasitize T. vaprcrcn-aorum over B.tabaci, and they produced and signfficantly higher parasitism rate on greenhouse whitefly than on tobacco whitefly. Its parasitism rates were affected by host plants. Encarsia formosa parasitized more nymph of tobacco whitefly on tobacco than on other three crops. There were significant difference in parasitized rate between four tested crops, and its preference order for the four crops was as follow: tabacco>cabbage> cotton>cucumber.

Key words: Encarsia formosa, Trialeurodes vaprorarioram, Bemisia tabaci, Parasitic preference

中图分类号: 

• S433.3