Index Catalog // ScholarsArchive@OSU

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:: the Douglas-fir beetle (see previous Internal Report), and no published study has dealt with the

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:: western Washington were used to determine the attack distribution and develop a sampling technique for an

Creator:: Deyrup, Mark Amidon and U.S. International Biological Program. Coniferous Forest Biome
Abstract:: The insects that invade a dying or dead tree are the immediate cause of death and the principle mediators of early stages of decomposition of the tree. These insects form a large and complex community, the species components of which are restricted to particular habitats. A study of the insect...
Resource Type:: Technical Report
Full Text:: our study area in western Washington and areas in the eastern range of Douglas-fir. Recently (1968

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:: -DECOMPOSER INTERFACE OF DOUGLAS-FIR R. 1. Gara, M. Dreyup, R. L. Hedden, L. E. Merrifield, and D. Souto

Creator:: Dooling, Oscar J., Eder, Robert G., and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: for dwarf mistletoe In Douglas-fir (DF), western larch (WL), and lodgepole pine (LP) on the Flathead

Creator:: Stipe, Lawrence E., Dewey, Jerald E., and United States. Forest Service. Northern Region
Abstract:: Trees in a Douglas-fir stand infested with western spruce budworm were treated with a systemic insecticide to protect cone and seed production at three locations in Montana during 1983. Treatments applied were (1) acephate as an Acecap implant, (2) acephate as an Inject-A-Cide injection, and (3) control. Potential cone-bearing trees...
Resource Type:: Technical Report

ScholarsArchive@OSU