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采用四臂式嗅觉仪测定了长棒四节蚜小蜂(Pteroptrixlonggiclava(Girault)(Hymenoptera:Aphelinidae))和黄胸扑虱蚜小蜂(Encarsiagigas(Tshumakova)(Hymenoptera:Aphelinidae)),对健康的小青×黑杨(Populuspseudo-simonii×P.nigra)树皮、被杨圆蚧(Quadraspidiotusgigas(Thiem&Gerneck))危害的杨树皮、杨圆蚧1龄固定若虫的虫体和介壳的挥发油的趋性反应。测定结果表明:被杨圆蚧危害后的小青×黑杨树皮和杨圆蚧1龄固定若虫的介壳对长棒四节蚜小蜂和黄胸扑虱蚜小蜂成虫具有较大的吸引力。3~7mL介壳挥发油和5~9mL受害杨树皮挥发油对长棒四节蚜小蜂的寄主搜寻行为具有较强的引导作用。虫体的挥发油对小蜂的寄主定位也起到了一定的引诱作用。两种小蜂对健康树皮的挥发油几乎没有反应。图4表1参20。
A four-arm olfactometer was used to determine the genetic diversity of Pteroplex longgiclava (Hymenoptera: Aphelinidae) and Encarsiagigas (Tshumakova) (Hymenoptera: Aphelinidae) Populus pseudobulb-simonii × P. nigra bark, Poplar bark (Thiem & Gerneck) . The results showed that the shell of Xiaoqing × black poplar bark and the first instar nymphs of Populus deltoides had a great attraction to the adult Aphis gossypii and Larvae spp. force. The volatile oil from 3 to 7 mL of shell oil and 5 to 9 mL of poplar bark had a strong guiding role in the host search behavior of the beetle Aphis gossypii. Insect volatile oil on the bee host positioning also played a certain role in attracting. The two bees have little reaction to the volatile oils of healthy barks. Figure 4 Table 1 Reference 20.