Department of Entomology, University of California, 92521, Riverside, California.
J Chem Ecol. 1994 Nov;20(11):2931-41. doi: 10.1007/BF02098399.
The response of western pine beetle,Dendroctonus brevicomis Le Conte, to different release rates of the aggregation semiochemicals (attractants)exo-brevicomin, frontalin, and myrcene and the inhibitors verbenone and ipsdienol was investigated. Release rates of verbenone ranging from 0.18 mg/ 24 hr to 1.2 mg/24 hr did not result in significant reductions in mean trap catch ofD. brevicomis. In contrast, very low release rates of ipsdienol (0.02-0.4 mg/24 hr) significantly reduced trap catch compared to controls. The combination of verbenone and ipsdienol, released at rates above 0.09 and 0.02 mg/24 hr, respectively, resulted in significantly lower trap catches ofD. brevicomis in attractant-baited traps. Results of an experiment testing a factorial combination of different release rates of verbenone and attractants suggest that response is not ratio-specific. The response curve ofD. brevicomis to the levels of verbenone was similar across all levels of attractants, while the response to equivalent ratios of attractants to verbenone was not similar, suggesting that the behavior of the beetles is primarily influenced by the absolute release rate of verbenone.
西方松甲虫（Dendroctonus brevicomis Le Conte）对不同释放率的聚集信息素（引诱剂）外-短叶烯、法呢烯和苎烯以及抑制剂马鞭烯酮和异胡薄荷醇的反应进行了研究。马鞭烯酮的释放率从 0.18 毫克/24 小时到 1.2 毫克/24 小时，并没有导致西方松甲虫的平均诱捕器捕获量显著减少。相比之下，非常低的异胡薄荷醇释放率（0.02-0.4 毫克/24 小时）与对照相比，显著降低了诱捕器的捕获量。马鞭烯酮和异胡薄荷醇的组合，以分别高于 0.09 和 0.02 毫克/24 小时的释放率释放，导致诱捕器中西方松甲虫的诱捕量明显降低。测试马鞭烯酮和引诱剂不同释放率的因子组合的实验结果表明，反应不是比例特异性的。西方松甲虫对马鞭烯酮水平的反应曲线在所有引诱剂水平上相似，而对相当于马鞭烯酮的引诱剂比值的反应则不相似，这表明甲虫的行为主要受马鞭烯酮的绝对释放率影响。
