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Title: Disruption Of Secondary Attraction Of The Spruce Beetle, Dendroctonus rufipennis, By Pheromones Of Two Sympatric Spcies

Author: Poland, Therese M.; Borden, J. H.;

Date: 1998

Source: Journal of Chemical Ecology. Vol. 24 no. 1.:p. 151-166. (1998)

Publication Series: Scientific Journal (JRNL)

Description: Capture of spruce beetles, Dendroctonus rufipennis, in multiple-funnel traps baited with frontalin and -pinene was reduced by up to 42% in the presence of synthetic (+)-exo- and (+)-endo-brevicomin, aggregation pheromones of the sympatric species Dryocoetes affaber. (+)-endo-Brevicomin was inhibitory to spruce beetles in two experiments and (+)-exo-brevicomin was inhibitory in one experiment, reducing spruce beetle trap catches by up to 87% and 75%, respectively. Spruce beetle trap catches were also reduced by 85% by (+)- or (+)-ipsdienol, but not by (-)-ipsdienol. Ips tridens, a second sympatric species, produces both enantiomers of ipsdienol in its pheromone blend. Responses by D. affaber to its own pheromone were significantly enhanced by addition of the spruce beetle lure. Enantiospecific pheromones of secondary competing species, or less costly racemic substitutes, may be useful for managing spruce beetles using competitive displacement or exclusion. Baiting susceptible hosts with pheromones of secondary species may enhance attack by secondary species, while partially repelling spruce beetles.

Keywords: Dendroctonus rufipennis, Ips tridens, Dryocoetes affaber, bark beetle, pheromone, inhibition, frontalin, -pinene, ipsdienol, cis-verbenol, exo-breviconfin, endo-brevicomin, enantiomers

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Poland, Therese M.; Borden, J. H. 1998. Disruption Of Secondary Attraction Of The Spruce Beetle, Dendroctonus rufipennis, By Pheromones Of Two Sympatric Spcies. Journal of Chemical Ecology. Vol. 24 no. 1.:p. 151-166. (1998)

 


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