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Creator:: Hedden, Roy L., Gara, Robert I., U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Abstract:: The attack spatial pattern of the Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins was shown to be regular within a given subarea of bark on its host, Pseudotsugae menziesii (Mirb.) Franco. Empirical arguments were advanced which indicated the uniform spacing of attacks was the result of a beetle controlled spacing mechanism dependent...
Resource Type:: Technical Report
Full Text:: PATTERN OF AN ENDEMIC DOUGLAS-FIR BEETLE POPULATION ABSTRACT The attack spatial pattern of the Douglas

Creator:: Hedden, Roy L., Gara, Robert I., U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Abstract:: Felled second-growth Douglas-fir trees in western Washington were used to determine the attack distribution and develop a sampling technique for an endemic Douglas-fir beetle, Dendroctonue peeudotaugae Hopk. (Coleoptera: Scolytidae) population. The attack density varied by circumferential position. The lowest density was on the upper bole and the highest on one...
Resource Type:: Technical Report
Full Text:: Douglas-fir trees in western Washington. Thus recognizing the Importance of the Douglas-fir beetle in the

Creator:: Gara, Robert I., Dreyup, M., Hedden, Roy L., Merrifield, L. E., Souto, D., U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Resource Type:: Technical Report
Full Text:: beetles; attack characteristics of the Douglas-fir beetle; and preliminary investigation of the tree

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