Southern pine beetle (Dendroctonus frontalis Zimmermann) and black turpentine beetle (Dendroctonus terebrans Olivier) are two sympatric bark beetle pests of the southeastern United States of America that adversely affect pine (Pinus spp.) health. Successful host tree colonization and reproduction is dependent on a chemical communication system that includes compounds produced by both the beetles and their host trees. To better understand the role of host volatiles in the ecology of these species, we (1) used coupled gas chromatography-electroantennographic detection (GC-EAD) to analyze olfactory sensitivity of D. frontalis and D. terebrans to volatile constituents of host resin, and (2) investigated olfactory stimulants for behavioral effects on both pest species and a major predator, Thanasimus dubius Fabricius (Coleoptera: Cleridae) in field trapping studies. In GC-EAD analyses of the headspace of fresh host resin, antenna of both D. frontalis and D. terebrans produced strongest responses to alpha-pinene, beta-pinene, myrcene, and 4-allylanisole. Field tests indicated that alpha-pinene, beta-pinene, and 4-allylanisole significantly enhanced attraction of D. frontalis, D. terebrans, and T. dubius to traps baited with attractive pheromone components of both bark beetle species, and myrcene diminished this response for D. frontalis. The observed attractive synergism of 4-allylanisole contrasts with previously reported repellency of this compound for D. frontalis and instead suggests this semiochemical may have multiple ecological roles for this species. Lures used for monitoring D. frontalis may be enhanced in sensitivity by adjusting the composition of their host odor components.

南部松树甲虫（Dendroctonus frontalis Zimmermann）和黑色松节油甲虫（Dendroctonus terebrans Olivier）是美利坚合众国东南部的两种同伴树皮甲虫，对松树（Pinus spp。）的健康有不利影响。成功的寄主树定植和繁殖取决于化学通讯系统，该系统包括甲虫及其寄主树产生的化合物。为了更好地了解宿主挥发物在这些物种生态中的作用，我们（1）使用了气相色谱-电电联检（GC-EAD）来分析额叶D和对虾的嗅觉敏感性。（2 ）在田间诱捕研究中，研究了嗅觉刺激剂对有害生物种类和主要捕食者Thanasimus dubius Fabricius（鞘翅目：科）的行为影响。在对新鲜主体树脂的顶空进行GC-EAD分析时，额叶天竺葵和D. terebrans的触角对α -pine烯，β -pine烯，月桂烯和4-烯丙甲醚的反应最强。现场测试表明的α蒎烯，测试蒎烯，和4-烯丙基茴香醚的显著增强吸引力D.额，D. terebrans，和T.蝗诱捕诱捕两种树皮甲虫物种的有吸引力的信息素成分的诱饵，而月桂烯则减少了对D. frontalis的这种反应。4-烯丙基茴香醚对比用这种化合物用于先前报道排斥性所观察到的协同作用吸引力D.额和代替暗示此信息化合物可以具有用于此物种的多个生态作用。通过调节其宿主气味成分的成分，可以提高用于监测额叶毛。的诱剂的敏感性。