Department of Entomology, Agricultural University, Wageningen, The Netherlands.
J Chem Ecol. 1990 Dec;16(12):3531-44. doi: 10.1007/BF00982116.
The behavior ofTrichogramma pretiosum Nixon wasps when exposed to different olfactory cues was studied in a wind tunnel. Compared to clean air, the sex pheromone of its hostHeliothis zea (Boddie) increased wasp residence times, walking times, and path lengths on a platform and decreased walking velocity. If wasps were released on top of a glass rod above a platform, the odor caused the wasps to land shortly after takeoff. In addition, a clear dose effect with regard to total residence and walking times was found. These responses were not elicited by three dosages of the sex pheromone ofSpodoptera frugiperda (J.E. Smith) or by a blend of saturated acetates. These results correspond with the observation thatH. zea is a common field host ofT. pretiosum, whereas eggs ofS. frugiperda are rarely attacked by this parasitoid.
在风洞中研究了美洲玉米螟（Heliothis zea（Boddie））性信息素暴露对三化螟（Trichogramma pretiosum Nixon）寄生蜂行为的影响。与清洁空气相比，其宿主美洲玉米螟的性信息素增加了寄生蜂在平台上的停留时间、行走时间和路径长度，降低了行走速度。如果将寄生蜂释放到平台上方的玻璃棒上，气味会导致寄生蜂在起飞后不久降落。此外，还发现总停留时间和行走时间存在明显的剂量效应。这些反应不会被三种剂量的草地贪夜蛾（Spodoptera frugiperda（J.E. Smith））性信息素或饱和醋酸酯混合物引起。这些结果与以下观察结果一致，即美洲玉米螟是三化螟的常见田间寄主，而草地贪夜蛾的卵很少受到这种寄生蜂的攻击。
