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Published online by Cambridge University Press:  31 May 2012

Henry A. Moeck
Forest Products Laboratory, Department of Fisheries and Forestry, Vancouver, B.C.


Methanol, acetaldehyde, and ethanol have been identified in extracts of attractive wood and bark. The attractancy induced by anaerobic treatment in both sapwood and phloem of conifers and broadleaf trees was characterized by ethanol as the most concentrated component. In laboratory bioassays, ethanol was attractive at low concentration to both sexes of Trypodendron lineatum (Olivier). Methanol and acetaldehyde, at the concentrations found, apparently play no role in attraction. Monoterpenes had a repellent effect on T. lineatum.


Parmi les extraits du bois attirant le Scolyte birayé, l’auteur étudia le méthanol, l’acétaldéhyde et l’éthanol. Or c’est l’éthanol qui existait en proportion majeure dans les substances attirant le plus — par traitement anaérobie — les insectes dans l’aubier et le phloème des Conifères et feuillus. En laboratoire, l’éthanol très dilué attirait les Scolytes birayés des deux sexes, cependant que le méthanol et l’acétaldéhyde, en les concentrations trouvées, ne les attiraient pas. Les monoterpènes les repoussaient.

Copyright © Entomological Society of Canada 1970

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