Abstract
Monoterpenes affected the attraction of three sympatric species of bark beetles (Coleoptera: Scolytidae) to pheromone-baited multiple-funnel traps in stands of lodgepole pine. Catches of
Ips pini(Say) in traps baited with its pheromone, ipsdienol, were directly related to the release rates of 3-carene, ß-pphellandrene, and ß-pinene. Catches of
Dendroctonus ponderosae Hopkins in traps baited with
exo-brevicomin and cis- and trans-verbenol were directly related to the release rates of 3-carene, myrcene, and pphellandrene.
Ips latidens (LeConte) exhibited preferences for traps baited with ipsenol and ß-phellandrene or ß-pinene but not in a dose-dependent fashion. Catches of
I. latidens in traps baited with its pheromone, ipsenol, were inversely proportional to the release rates of 3-carene, myrcene, and terpinolene. Similarly, catches of
I. pini in traps baited with its pheromone, ipsdienol, were inversely proportional to the release rates of myrcene and terpinolene. These results demonstrate a degree of species specificity among three phloeophagous species with respect to preferred host odours. The bark beetle predators-associates
Lusconotus complex LeConte (Coleoptera: Colydiidae) and
Corticeus Piller and Mitterpacher sp. (Coleoptera: Tenebrionidae) demonstrated some measure of specificity to monoterpenes in their responses to ipsdienol-baited funnel traps.
g-Terpinene increased attraction of L. complex but had no effect on Corticeus sp., whereas
a- and ß-pinene increased attraction of Corticeus sp. but had no effect on
L. complex.
Citation
Miller, Daniel R.; Borden, John H. 2000. Dose-Dependent and Species-Specific Responses of Pine Bark Beetles (
Coeoptera: Scolytidae) to Monoterpenes in Association with Phermones. The Canadian Entomologist 132 : 183-195. (2000)
