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Field Identification of Ambrosia Beetles Attacking Coniferous Timber in the Douglas-Fir Region

Published online by Cambridge University Press:  31 May 2012

Norman E. Johnson
Norman E. Johnson
Affiliation:
Weyerhaeuser Timber Company, Forestry Research Center Centralia, Washington
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Extract

Coniferous timber in the Douglas-Fir Region is commonly subject to attack by ambrosia beetles of the families Scolytidae and Platypodidae. In view of the variety and extent of damage there is need for a ready method of identifying the ambrosia beetles causing major losses. It is the purpose of this paper to present methods of identifying the genera of ambrosia beetles found in the Douglas-Fir Region, by the general body shape of the insect, the diameter of the tunnel the beetles bore and the shape of the wood borings which they eject from these tunnels. These methods were developed by the author from original work conducted at Corvallis, Oregon in 1955-56 as part of his master's thesis at Oregon State College. Kinghorn, in Canada, developed similar methods of distinguishing ambrosia beetle damage and recently published means of differentiating the work of Gnathotrichus, from Trypodendron (Kinghorn, 1957).

Type
Articles
Information
The Canadian Entomologist , Volume 90 , Issue 4 , April 1958 , pp. 236 - 240
Copyright
Copyright © Entomological Society of Canada 1958

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References

Chamberlin, W. J. 1939. The bark and timber beetles of North America. Corvallis: Ore. State Coop. Assoc. 470 pp. illus.Google Scholar
Graham, K. A. and Boyes, E. C.. 1950. Pinworms in lumber—historical and economic aspects. British Columbia Lumberman 34(8): 42, 106.Google Scholar
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Prebble, M. L. and Graham, K.. 1957. Studies of attack by ambrosia beetles in softwood logs on Vancouver Island, British Columbia. Forest Science 3 (1): 90–112.Google Scholar