No abstract

Several main monoterpenes and their combinations from Dahurian larch (1,ariz gttieliniiRupr. ) cones were used as odor sources in olfactory experiment to test the responses of larch cone flies (Strohilorrryia spp. ) in 1998. The results revealed that blend of a -pinene, / 3 -pinene, laurene and / 3ocimene in a ratio close to its volatile profile of damaged cones achieved the best response while certain odors showed repellent tendency to cone flies. Field spraying Dahurian larch cones with some of its volatile components had mixed results but support the olfactory testing results. The role of monoterpenes in cone fly host location and oviposition in terms of attractive signals or repellent is discussed.