Skip to Main Content
Competitive Exclusion of Dendroctonus rufipennis Induced by Pheromones of Ips tridens and Dryocoetes affaber (Coleoptera: Scolytidae)Author(s): Therese M. Poland; John H. Borden
Source: Journal of Economic Entomology. Vol. 91 no. 5.:p. 1150-1161. (1998)
Publication Series: Scientific Journal (JRNL)
Station: North Central Research Station
PDF: View PDF (2.42 MB)
DescriptionWe tested the feasibility of competitive exclusion as a potential management tactic for the spruce beetle, Dendroctonus rufipennis Kirby, using pre-attack baiting with pheromones of 2 secondary species, Ips tridens Mannerheim and Dryocoetes affaber Mannerheim. Spruce beetle attack densities, gallery lengths per square meter, and progeny densities were significantly reduced by up to 78% in individual felled trees baited with the I. tridens pheromones (+/-)-ipsdienol and (-)-cis-verbernol, and the D. affaber pheromones (+/-)-exo-and (+)-endo-brevicomin, or pheromones of both secondary species. A simplified D. affaber bait consisting of only (+/-)-endo-brevicomin also significantly reduced spruce beetle attacks, resource exploitation, and progeny production. Baiting with I. tridens pheromones also reduced spruce beetle attack and success in simulated patches of windthrown trees. Resource exploitation and indirect interference by synomonal inhibition of spruce beetle attack are the most likely competitive mechanisms invoked. Competitive exclusion of the spruce beetle may provide an alternative management tactic where traditional methods based on tree removal, widespread harvesting, and the use of insecticides are not feasible.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationPoland, Therese M.; Borden, John H. 1998. Competitive Exclusion of Dendroctonus rufipennis Induced by Pheromones of Ips tridens and Dryocoetes affaber (Coleoptera: Scolytidae). Journal of Economic Entomology. Vol. 91 no. 5.:p. 1150-1161. (1998)
KeywordsDendroctonus rufipennis, Ips tridens, Dryocoetes affaber, interspecific competition, competitive exclusion, pheromone
- Attraction of bark beetle predator, Thanasimus undatulus (Coleoptera: Cleridae), to pheromones of the spruce beetle and two secondary bark beetles (Coleoptera: Scolytidae)
- Disruption Of Secondary Attraction Of The Spruce Beetle, Dendroctonus rufipennis, By Pheromones Of Two Sympatric Spcies
- Use of semiochemicals of secondary bark beetles to disrupt spruce beetle attraction and survival in Alaska.
XML: View XML