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Published online by Cambridge University Press:  31 May 2012

Peter de Groot*
Great Lakes Forestry Centre, Canadian Forest Service, Natural Resources Canada, Box 490, Sault Ste. Marie, Ontario, Canada P6A 5M7
Gary L. DeBarr
Forestry Sciences Laboratory, Southern Research Station, USDA Forest Service, Athens, Georgia, United States 30602
1 Author to whom all correspondence should be addressed (E-mail:


Field studies were conducted in the United States and Canada to determine the response of the white pine cone beetle, Conophthorus coniperda (Schwarz), and the red pine cone beetle, Conophthorus resinosae Hopkins, to two potential inhibitors, conophthorin and verbenone, of pheromone communication. Trap catches of male C. coniperda and C. resinosae were significantly reduced and generally declined with increasing concentrations of conophthorin in traps baited with the pityol, a female-produced pheromone. Verbenone did not significantly reduce trap catches of C. coniperda. Conophthorin, but not verbenone, significantly reduced cone attacks by C. coniperda when placed near cone clusters. The twig beetles, Pityophthorus cariniceps LeConte and Pityophthorus puberulus (LeConte), responded to traps with pityol and α-pinene baits alone or with conophthorin. Thanasimus dubius (F) (Coleoptera: Cleridae) was attracted to the pityol and α-pinene, but conophthorin had no effect on attraction of this generalist bark beetle predator. Verbenone significantly reduced trap catches of T. dubius in pityol-baited traps.


Des études sur le terrain ont été entreprises aux États-unis et au Canada pour déterminer la réaction du Scolyte des cônes du pin blanc, Conophthorus coniperda (Schwarz) et du Scolyte des cônes du pin rouge, C. resinosae Hopkins, à deux inhibiteurs potentiels de la communication par les phéromones, la conophthorine et la verbénone. Le nombre de captures de mâles de C. coniperda et de C. resinosae a diminué significativement et de façon générale lorsqu’augmentait la concentration de conophthorine dans des pièges garnis de pityol, une phéromone femelle. La verbénone n’a pas réduit significativement le nombre de captures de C. coniperda. La conophthorine, mais pas la verbénone, a réduit significativement le nombre d’infestations de cônes par des C. coniperda placés au voisinage de groupes de cônes. Les scolytes des rameaux Pityophthorus cariniceps LeConte et Pityophthorus puberulus (LeConte) ont eu des réactions positives aux pièges garnis de pityol ou d’α-pinène, seuls ou en combinaison avec de la conophtorine. Thanasimus dubius (F.) (Coleoptera : Cleridae) était attiré par les pièges garnis de pityol ou d’α-pinène, mais la conophthorine n’avait pas de pouvoir d’attraction pour ce prédateur de scolytes. La verbénone a eu pour effet de diminuer le nombre de T. dubius capturés dans les pièges garnis de pityol.

[Traduit par la Rédaction]

Copyright © Entomological Society of Canada 2000

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