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Characteristics of Douglas-Fir Logs in Relation to Ambrosia Beetle Attack

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Attacks of an ambrosia beetle Trypodendron lineatum (Olivier) were examined in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) logs cut at various times. Brood production was higher in autumn- and winter-felled logs and in logs from faster growing trees. Outer sapwood moisture was similar in all trees at felling. It changed little during the study and was unrelated to attack. At the time of heavy attack, sapwood of the preferred autumn- and winter-felled trees had little or no starch and gave weak or negative reactions to tetrazolium red. The unattractive spring-felled logs contained appreciable starch and gave marked tetrazolium reactions.

Keywords: Pseudotsuga menziesii; Trypodendron lineatum; sapwood moisture content; sapwood starch content

Document Type: Journal Article

Affiliations: Entomologists at the Forest Research Laboratory, Canada Dept. of Forestry and Rural Development, Victoria, B. C.

Publication date: 1969-03-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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