Environmental Entomology (1987) 16, 1310-1313

J.J. Witcosky, T.D. Schowalter and E.M. Hansen (1987)
Host-derived attractants for the beetles Hylastes nigrinus (Coleoptera: Scolytidae) and Steremnius carinatus (Coleoptera: Curculionidae)
Environmental Entomology 16 (6), 1310-1313
Abstract: The responses of Hylastes nigrinus (Mannerheim) and Steremnius carinatus (Boheman) to pitfall traps baited with root sections of healthy Douglas-fir, Pseudotsuga menziesii (Mirbel) Franco, or sections of Douglas-fir infected with the fungus Ceratocystis wageneri Goheen and Cobb, and to pitfall traps baited with ethanol or alpha-pinene, were examined. Significantly more H. nigrinus and S. carinatus were caught in pitfall traps baited with infected root sections than in traps baited with healthy roots. More beetles were attracted to traps baited with alpha-pinene or with ethanol than to unbaited traps. We suggest that plant injury, stress, or infection by C. wageneri may lead to the production and release of volatile host attractants which are detected by insect vectors during the host-selection process.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Timothy D. Schowalter

Research topic(s) for pests/diseases/weeds:
pheromones/attractants/traps
transmission/dispersal of plant diseases

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Hylastes nigrinus	Douglas fir (Pseudotsuga menziesii)	U.S.A. (NW)
	Steremnius carinatus	Douglas fir (Pseudotsuga menziesii)	U.S.A. (NW)