Sanou Apolline, Traoré Fousséni, Ba Malick Niango, Dabiré-Binso Clémentine L, Pittendrigh Barry R, Sanon Antoine
Laboratoire Central d'Entomologie Agricole de Kamboinsé, Institut de l'Environnement et de Recherches Agricoles, Ouagadougou, Burkina Faso.
Laboratoire d'Entomologie Fondamentale et Appliquée, UFR/SVT, Université Ouaga I Pr Joseph Ki-Zerbo, Ouagadougou, Burkina Faso.
Int J Insect Sci. 2019 Jan 29;11:1179543318825250. doi: 10.1177/1179543318825250. eCollection 2019.
The egg parasitoid is a potential biological control agent of , a coreid pod-sucking pest of . The host location behavior of naive parasitoid females was studied using a four-armed olfactometer. Two strains of parasitoids from Burkina Faso and Benin were exposed to odors provided by healthy and infested pods as well as females and males. The time spent in each odor zone was recorded to determine the preference of parasitoid females. Results show that odors from healthy pods, infested pods, and pest females did not attract the parasitoid. However, a significantly attractive response of both strains of was recorded in the presence of volatiles from males of . Moreover, experiments testing females' behavior when simultaneously exposed to volatiles from cowpea pods (healthy and infested) and increasing numbers of males revealed a significantly higher attraction of parasitoid females of both strains by volatiles from ten males of . The results suggest that the males of the insect pest emit a pheromone used as kairomone by parasitoids to locate their host. The conditions determining this attractiveness at field level and its impact on host-searching efficiency are discussed.
这种卵寄生蜂是一种潜在的生物防治剂，可用于防治[某种害虫名称]，它是[某种植物名称]的一种吸食豆荚的缘蝽科害虫。使用四臂嗅觉仪研究了未接触过寄主的寄生蜂雌虫的寄主定位行为。将来自布基纳法索和贝宁的两株寄生蜂暴露于健康豆荚和受侵染豆荚以及该害虫雌虫和雄虫所散发的气味中。记录寄生蜂在每个气味区域停留的时间，以确定寄生蜂雌虫的偏好。结果表明，来自健康豆荚、受侵染豆荚和害虫雌虫的气味并未吸引寄生蜂。然而，在存在该害虫雄虫挥发物的情况下，记录到两株寄生蜂均有显著的吸引反应。此外，当同时将寄生蜂雌虫暴露于豇豆荚（健康和受侵染）的挥发物以及数量不断增加的该害虫雄虫时进行的实验表明，来自十只该害虫雄虫的挥发物对两株寄生蜂雌虫的吸引力显著更高。结果表明，这种害虫的雄虫会释放一种信息素，寄生蜂将其用作利它素以定位寄主。本文还讨论了在田间水平决定这种吸引力的条件及其对寄主搜索效率的影响。
