纵坑切梢小蠹聚集化合物探讨

纵坑切梢小蠹(Tomicus piniperda L.)属于聚集性松树害虫。它是利用化学气味物质建立种内或种间联系,并由此形成聚集危害的。早在60年代,Oksanen和Perttunen等已注意到具有化学气味的物质对纵坑切梢小蠹聚集行为的影响,并对此进行过大量研究。近二十年来,探索纵坑切梢小蠹的聚集机制,已受到更多中外学者的广泛关注。由于多种原因,关于引起纵坑切梢小蠹聚集的化合物种类及释放量的问题仍然存有较大争议,该虫是否具有信息素物质也存在着截然不同的结论。确定引起纵坑切梢小蠹聚集的化学气味物质对于揭示该虫的聚集机制,加深虫害发生规律的认识,进而利用这些化合物进行害虫测报和防治具有重要意义。笔者曾对纵坑切梢小蠹种群进行了多方面研究。现将部分诱虫试验,和对有关气味化学物质的检测分析结果报道于后。

A PRELIMINARY STUDY ON CHEMICAL COMPOUNDS INDUCING AGGREGATION OF TOMICUS PINIPERDA L.

In Kunming district, Yunnan pine is the only host tree of Tomicus pini-perda (L. ). The pine shoot beetle usually reproduces in living tree, but haveno eminent taxis to the logs and stumps of the host trees. The testing of theviolent compounds in the postgut of the beetles by MC/GS/DS showed that,there were verbenone, trans-verbenol and myrtenol in it. The amounts of ver-benone was low before reproduction in the tunnel, and increased with pro-gress of tunnel constuctrion. The amounts of trans-verbenol and myrtenol werehigh in the early of the reproduction, and then decreased with time. On thebasis of comparing with mass attack behavior of the pine shoot beetle, it issuggested that verbenone has a inhabitant influence on the pine shoot beetles'aggregation, trans-verbenol and myrtenol could have active effect to the beetleaggregation.