Abstract: In Kunming district, Yunnan pine is the only host tree of Tomicus piniperda (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, transverbenol and myrtenol in it. The amounts of verbenone was low before reproduction in the tunnel, and increased with progress of tunnel constuctrion. The amounts of transverbenol 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, transverbenol and myrtenol could have active effect to the beetleaggregation.

Key words: Tomicus piniperda, Yunnan pine, Chemical ecology, Pheromone