Haplogonatopus oratorius (Westwood) (Hymenoptera, Dryinidae) is a parasitoid wasp of the small brown planthopper, Laodelphax striatella Stål (Homoptera, Delphachidae). To evaluate host location and recognition by H. oratorius, we investigated the behavioral response of female wasps to volatiles, vibration signals, and cuticular hydrocarbons emitted by L. striatella. The wasps did not show any positive response to host or plant volatiles but were strongly attracted to a playback of host calling vibrations and host hydrocarbons. These results suggest that the host hydrocarbons and vibration signals are important cues for the identification of suitable host resources.

Haplogonatopus oratorius（Westwood）（Hymenoptera，Dryinidae）是小型褐飞虱Laodelphax striatellaStål（Homoptera ，Delphachidae）的寄生蜂。通过评估主机定位和识别H. oratorius，我们研究雌蜂的挥发物，振动信号，并且通过发射表皮烃行为反应L. striatella。黄蜂对宿主或植物的挥发物没有表现出任何积极的反应，但强烈吸引宿主的振动和宿主碳氢化合物的回放。这些结果表明，宿主碳氢化合物和振动信号是识别合适宿主资源的重要线索。