Witzgall, Peter
- Department of Crop Science, Swedish University of Agricultural Sciences
Abstract
Coeloides bostrichorum Giraud parasitoids (Hymenoptera: Braconidae) attack late larval stages of various bark beetle species breeding in spruce. Volatile compounds collected from Norway spruce (Picea abies) infested by Ips typographus L. (Coleoptera: Scolytidae) were analysed by coupled gas chromatography-mass spectrometry (GC-MS) and GC-electroantennographic detection (GC-EAD). Monoterpene hydrocarbons an the predominant volatile compounds of fresh Norway spruce, while the presence of oxygenated monoterpenes indicates damaged trees. Between one and eight EAD-active oxygenated monoterpenes were used, in amounts reflecting their natural abundance in spruce trees containing bark beetle larvae, to prepare fia e synthetic baits which were tested in wind runner bioassays. Odour samples collected from spruce logs containing the preferred host stage were attractive, while similar samples from uninfested logs failed to elicit any flight activity. However, when a four- or an eight-component synthetic bait was added to volatiles collected from uninfested spruce logs, this combination was as attractive as volatiles collected from infested spruce logs
Published in
Naturwissenschaften
2001, volume: 88, number: 2, pages: 88-91
Publisher: SPRINGER-VERLAG
SLU Authors
UKÄ Subject classification
Environmental Sciences and Nature Conservation
Food Science
Publication identifier
- DOI: https://doi.org/10.1007/s001140100209
Permanent link to this page (URI)
https://res.slu.se/id/publ/7112