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首页> 外文期刊>Journal of Chemical Ecology >Olfactory Responses of Ips duplicatus from Inner Mongolia, China to Nonhost Leaf and Bark Volatiles
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Olfactory Responses of Ips duplicatus from Inner Mongolia, China to Nonhost Leaf and Bark Volatiles

机译：中国内蒙古Ips Dupsus对非寄主叶和树皮挥发物的嗅觉响应

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Leaf and bark volatiles from nonhost angiosperm trees were tested on Ips duplicatus by gas chromatographic–electroantennographic detection (GC-EAD) and by pheromone-baited traps in Sweden and Inner Mongolia, China, respectively. GC-EAD analysis of the headspace volatiles from fresh bark chips of Betula pubescens revealed trans-conophthorin, two green leaf volatiles (GLVs): 1-hexanol and (Z)-3-hexen-1-ol, and two C8 alcohols: 3-octanol and 1-octen-3-ol, that consistently elicited antennal responses by I. duplicatus. The identification of these EAD-active compounds was confirmed in further GC-EAD recordings with synthetic mixtures. Antennal responses were also found to synthetic (E)-2-hexen-1-ol and linalool, which have been identifed from the leaves of nonhost birch and aspen species. No antennal responses of I. duplicatus were found to hexanal, (E)-2-hexenal, and (Z)-3-hexyl acetates. In field trapping experiments, blends of EAD-active green leaf alcohols or C8 alcohols, or trans-conophthorin alone resulted in significant reductions (27–60%) in the number of I. duplicatus captured compared with pheromone-baited traps. The unsuitable host compound, verbenone (Vn), also significantly reduced trap catches by up to 60% in both experiments. The strongest disruptive effect resulted from the addition of the combination of green leaf alcohols, C8 alcohols, and verbenone to the pheromone trap, which caused an 84% reduction in trap catch. The blend of two green leaf aldehydes plus the acetate increased the trap catches in 1998 and had no negative or positive effects in 1999. Our results suggest that these nonhost volatiles (NHVs) are important olfactory signals used by I. duplicatus in host selection. They may have great significance in developing semiochemical-based management programs for I. duplicatus by reducing or stopping attacks on suitable hosts.
机译：来自非寄主被子植物树的叶和树皮挥发物分别通过气相色谱-电子血管造影检测（GC-EAD）和信息素诱集阱在瑞典和内蒙古的Ips Dupsus上进行了测试。 GC-EAD分析了来自短毛桦的新鲜树皮碎片的顶空挥发物，发现了反式conophthorin，两种绿叶挥发物（GLV）：1-己醇和（Z）-3-hexen-1-ol以及两种C8 酒精：3-辛醇和1-辛烯-3-醇，它们不断引起重复双歧杆菌的触角反应。这些EAD活性化合物的鉴定在合成混合物的进一步GC-EAD记录中得到了证实。还发现了对合成的（E）-2-hexen-1-ol和芳樟醇的反应，这是从非寄主桦树和白杨物种的叶子中鉴定出来的。没有发现I.duplicatus对己醛，（E）-2-己烯和（Z）-3-己基乙酸酯的触角反应。在田间诱集实验中，与用信息素诱饵的诱集剂相比，EAD活性绿叶醇或C8 醇的混合物或单独的反式conophthorin导致捕获的I. duplicatus数量显着减少（27-60％） 。在两个实验中，不合适的主体化合物马鞭草酮（Vn）也会显着降低捕集阱捕获量，最高可达60％。最强的破坏作用是由于在信息素诱捕剂中加入了绿叶醇，C8 醇和马鞭酮的组合，导致诱捕剂减少了84％。两种绿叶醛与乙酸盐的混合物在1998年增加了捕集阱的捕获量，在1999年没有负面或积极影响。通过减少或阻止对适当主机的攻击，它们在为重复双歧杆菌开发基于化学信息的管理程序中可能具有重要意义。

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