U.S. Department of Agriculture, Insect Attractants, Behavior, and Basic Biology Research Laboratory, Agricultural Research Service, 32604, Gainesville, Florida.
J Chem Ecol. 1991 Nov;17(11):2235-51. doi: 10.1007/BF00988004.
Volatiles released from corn seedlings on which beet armyworm larvae were feeding were attractive to females of the parasitoid,Cotesia marginiventris (Cresson), in flight tunnel bioassays. Analyses of the collected volatiles revealed the consistent presence of 11 compounds in significant amounts. They were: (Z)-3-hexenal, (E)-2-hexenal, (Z)-3-hexen-1-ol, (Z)- 3-hexen-1-yl acetate, linalool, (3E)-4,8-dimethyl-1,3,7-nonatriene, indole, α-trans-bergamotene, (E)-β-farnesene, (E)-nerolidol, and (3E,7E)-4,8,12-trimethyl-1, 3,7,ll-tridecatetraene. A synthetic blend of all 11 compounds was slightly less attractive to parasitoid females than an equivalent natural blend. However, preflight experience with the synthetic blend instead of experience with a regular plant-host complex significantly improved the response to the synthetic blend. Our results suggest thatC. marginiventris females, in their search for hosts, use a blend of airborne semiochemicals emitted by plants on which their hosts feed. The response to a particular odor blend dramatically increases after a parasitoid experiences it in association with contacting host by-products.
在飞行隧道生物测定中，喂食甜菜夜蛾幼虫的玉米幼苗释放的挥发物对玉米螟赤眼蜂的雌虫具有吸引力。对收集到的挥发物的分析表明，有 11 种化合物以显著的数量存在。它们是：（Z）-3-己烯醛、（E）-2-己烯醛、（Z）-3-己烯-1-醇、（Z）-3-己烯-1-基乙酸酯、芳樟醇、（3E）-4,8-二甲基-1,3,7-壬三烯、吲哚、α-反式佛手柑烯、（E）-β-法呢烯、（E）-橙花叔醇和（3E,7E）-4,8,12-三甲基-1,3,7,11-十三碳四烯。所有 11 种化合物的合成混合物对玉米螟赤眼蜂雌虫的吸引力略低于等效的天然混合物。然而，与接触常规植物-宿主复合物相比，飞行前接触合成混合物的经历显著提高了对合成混合物的反应。我们的结果表明，玉米螟赤眼蜂雌虫在寻找宿主时，会利用其宿主取食的植物释放的混合空气化学物质。在与接触宿主副产物相关联的情况下，经历特定气味混合物后，对该混合物的反应会急剧增加。
