. Differential effects of the 1944-56 spruce budworm outbreak in eastern Oregon. Spruce budworm Oregon; Trees Diseases and pests Oregon. 1940 1950 1958 1960 .0 , GRAND FIR DEAD STEM ( Dieback ). 0 1941 1942 1944 1946 1948 1950 1952 1954 1956 1958 Figure 1.—Annual increment comparisons and photograph of a heavily damaged grand fir and an adjacent, lightly damaged Douglas-fir which appeared to be competing with each other. The grand fir had the higher growth rate and was rapidly overtaking the Douglas-fir until feedings by spruce budworm killed its top and reduced its growth rate more than that
. Differential effects of the 1944-56 spruce budworm outbreak in eastern Oregon. Spruce budworm Oregon; Trees Diseases and pests Oregon. 1940 1950 1958 1960 .0 , GRAND FIR DEAD STEM ( Dieback ). 0 1941 1942 1944 1946 1948 1950 1952 1954 1956 1958 Figure 1.—Annual increment comparisons and photograph of a heavily damaged grand fir and an adjacent, lightly damaged Douglas-fir which appeared to be competing with each other. The grand fir had the higher growth rate and was rapidly overtaking the Douglas-fir until feedings by spruce budworm killed its top and reduced its growth rate more than that of the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Williams, Carroll B. cn; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ). [Portland, Or. ] : Pacific Northwest Forest and Range Experiment Station, Forest Service, U. S. Dept. of Agriculture
Size: 3582px × 698px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
