Natural Resources Canada, Canadian Forest Service-Atlantic Forestry Centre, Fredericton, New Brunswick, Canada.
J Chem Ecol. 2010 Dec;36(12):1309-21. doi: 10.1007/s10886-010-9876-1. Epub 2010 Nov 3.
The male-produced aggregation pheromones of Tetropium fuscum (F.) and T. cinnamopterum Kirby were identified as (2S,5E)-6,10-dimethyl-5,9-undecadienol by chemical analysis, synthesis, electronantennography, and field trapping; the compound is here renamed "fuscumol". The effect of fuscumol chirality, alone or with host volatiles, and fuscumol release rate on Tetropium spp. was tested in field-trapping experiments in Nova Scotia and Poland. Both (S)-fuscumol and racemic fuscumol synergized trap catches of male and female T. fuscum, T. cinnamopterum, and T. castaneum (L.) when combined with a blend of host monoterpenes and ethanol. Without added host volatiles, fuscumol was either unattractive (in Nova Scotia) or only slightly so (in Poland). (R)-Fuscumol, alone or in combination with host volatiles, did not elicit increases in trap capture of any Tetropium species, relative to the controls. Fuscumol synergized attraction of both sexes to host volatiles, thus indicating it acts as an aggregation pheromone. Sex ratio was often female-biased in traps baited with fuscumol plus host volatiles, and was either unbiased or male-biased in traps with host volatiles alone. In traps with host volatiles and racemic fuscumol, mean catches of Tetropium species were unaffected by fuscumol release rates ranging from 1 to 32 mg/d. The attraction of three different Tetropium species to the combination of (S)-fuscumol and host volatiles suggests that cross-attraction may occur where these species are sympatric, and that reproductive isolation possibly occurs via differences in close-range cues. These results have practical applications for survey and monitoring of T. fuscum, a European species established in Nova Scotia since at least 1980, and for early detection of T. castaneum, a European species not presently established in North America.
棕尾毒蛾（Tetropium fuscum（F.）和 T. cinnamopterum Kirby）雄蛾产生的聚集信息素通过化学分析、合成、电子触角图谱和田间诱捕确定为（2S,5E）-6,10-二甲基-5,9-十一碳二烯醇，该化合物在此被重新命名为“fuscumol”。在加拿大新斯科舍省和波兰进行的田间诱捕实验中，测试了 fuscumol 的手性、单独或与寄主挥发物以及 fuscumol 释放率对棕尾毒蛾属物种的影响。（S）-fuscumol 和外消旋 fuscumol 与寄主单萜和乙醇混合物联合使用时，可协同诱捕棕尾毒蛾、肉桂毒蛾和栗山天牛（L.）的雄蛾和雌蛾。在没有添加寄主挥发物的情况下，fuscumol 在新斯科舍省没有吸引力（在新斯科舍省）或只有轻微吸引力（在波兰）。（R）-fuscumol 单独使用或与寄主挥发物一起使用，与对照相比，均未增加任何棕尾毒蛾属物种的诱捕量。fuscumol 协同了两性对寄主挥发物的吸引力，因此表明它是一种聚集信息素。在 fuscumol 加寄主挥发物诱捕器中，性比通常偏向雌性，而在仅用寄主挥发物的诱捕器中，性比则是无偏差或偏向雄性。在含有寄主挥发物和外消旋 fuscumol 的诱捕器中，棕尾毒蛾属物种的平均捕获量不受 fuscumol 释放率（1 至 32mg/d）变化的影响。三种不同棕尾毒蛾属物种对（S）-fuscumol 和寄主挥发物组合的吸引力表明，在这些物种共存的地方可能会发生交叉吸引，并且通过近距离线索的差异可能发生生殖隔离。这些结果对于在欧洲自 20 世纪 80 年代以来就在加拿大新斯科舍省建立的棕尾毒蛾的调查和监测以及对尚未在北美建立的欧洲物种栗山天牛的早期检测具有实际应用价值。
