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:: 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

Creator:: Tunnock, Scott and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: acres of Douglas-fir were defoliated south of Kettle Falls, Washington, and egg masses were abundant in

Creator:: Tunnock, Scott and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: The last outbreak of the Douglas-fir tussock moth, Hemerocampa pseudotsugata McD., in the Northern Region subsided in 1965. Tussock moth populations were not detected again until 1970 when ornamental spruce were defoliated in Spokane, Washington, and Poison and Missoula, Montana.
Resource Type:: Technical Report
Full Text:: -8 5220 October 1972 DETECTION SURVEY FOR DOUGLAS-FIR TUSSOCK MOTH INFESTATIONS IN THE

Creator:: Carlson, Clinton E., Gilligan, Carma J., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: An evaluation to establish baseline data on forest insect and disease activity near a magnesium plant under construction in northeastern Washington was initiated in 1974. The plant will emit significant amounts of sulfur dioxide. Data indicates that several fungal and insect species are at low populations. Needle retention appears normal...
Resource Type:: Technical Report
Full Text:: Washington State University; PROTECTION V23 ..(06, • • • 2. Air monitoring for current SO 2

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:: Black, Hugh C., 1941-, Dimock, Edward J., Evans, James, 1930-, Rochelle, James Arthur, 1942-, and Oregon State University. Forest Research Laboratory
Abstract:: Mammal and bird damage recorded on Douglas-fir and ponderosa pine plots-randomly established in Oregon and Washington during 1963-64, then observed for 5 to 10 years-was evaluated for impact on survival and growth. In all, 194 plots were installed, and 10 of the 110 seedlings on each plot were caged to...
Resource Type:: Technical Report
Full Text:: 22 percent was similar to that for Douglas-fir in western Oregon and Washington. Table 7. 100 80

Creator:: Cole, Dale W., Grier, Charles Crocker, 1938-, U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Abstract:: Intensive studies of the mineral cycling process in young-growth Douglas-fir stands have been in progress at the R. H. Thompson Research Center since 1966. During this time, a substantial body of information has been collected on the amounts, pathways, rates of transfer, and mechanisms that control transfer of elements in...
Resource Type:: Technical Report
Full Text:: INTERNAL REPORT 19 MINERAL CYCLING IN DOUGLAS-FIR

Creator:: Scott, David R. M., Lassoie, J. P., U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Abstract:: Preliminary results of a comprehensive study of hydraulic fluctuations in Douglas-fir (Pseudotsuga menziesii) stems in response to plant water status and environment are presented. Diurnal changes in stem circumference near DBH of a dominant Douglas-fir were monitored using automated band dendrometers. Measurements of transpiration rate, internal moisture stress and stomata...
Resource Type:: Technical Report
Full Text:: of lower elevations in western Washington; the average temperature in July is 16°C, in January, 3°C

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