USDA Forest Service:
1939. Echodontium tinctorum conks on small western hemlock at full-timbered station. Priest River Experimental Forest, Idaho.
USDA Forest Service:
1941. Cross-section of fire-killed Douglas-fir. End of log 1; 60 feet from base. Gallery 6.5 inches deep; sap approximately 2.5 inches. Deterioration studies. Tillamook Burn, Oregon.
USDA Forest Service:
1948. Blister rust canker on sugar pine. Klamath National Forest, California.
USDA Forest Service:
1950. Hand points to landing strip on aerial mosaic of spray blocks. Umatilla National Forest Supervisor's Office. Western spruce budworm control project. Pendleton, Oregon.
USDA Forest Service:
1950. W.J. Buckhorn demonstrates first moss screening step in recovery of hemlock looper eggs. BEPQ. Portland, Oregon.
USDA Forest Service:
1950. Filling 5 gallon Jeep cans at Kremmling Goop Depot. Engelmann spruce bark beetle control project. Arapaho NF, CO.
USDA Forest Service:
1954. Detail: Walter J. Buckhorn demonstrating pulling emergency door release on survey plane Cessna 170-B. Hillsboro, Oregon.
USDA Forest Service:
1955. Pseudohylesinus grandis egg galleries on Pacific silver fir. Upper part - galleries on wood; lower part - galleries on bark, removed from upper part. Baker River District, Mt. Baker National Forest. Washington.
USDA Forest Service:
1957. Collecting kit used to collect diseased bark beetles.
USDA Forest Service:
1959. Shows typical bark thickness (4 inches) of old growth (600 year old) Douglas-fir exposed windfalls. McDonald Tree Farm, Washington.
USDA Forest Service:
1959. Balsam woolly adelgid (Chermes piceae) infestation reaching to ground line on large Abies lasiocarpa. Willamette Pass, Oregon.
USDA Forest Service:
1959. Pine shoot wrapped in Ribes leaf to inoculate the pine with blister rust. Wisconsin.
USDA Forest Service:
1960. Pocket gopher damage to the roots of a young dead pine tree. Lava Butte Plantation, Deschutes National Forest, Oregon.
USDA Forest Service:
1961. Ponderosa pine treated in 1960 with Ethylene dibromide to control an outbreak of mountain pine beetle. Bauer's Creek, Fremont National Forest, Oregon.
USDA Forest Service:
1961. Galleries in a 70-year-old ponderosa pine killed by Dendroctonus brevicomis. Killed tree is in an even-age stand that resulted from a devastating pine butterfly kill in the 1890s. Cedar Valley, Yakima Indian Reservation, Washington.
USDA Forest Service:
1961. Gas analyzer (fumiscope) used to measure methyl bromide gas pressure in portable chamber during outdoor fumigation of European pine shoot moth.
USDA Forest Service:
1961. Gas analyzer (fumiscope) used to measure methyl bromide gas pressure in portable chamber during outdoor fumigation of European pine shoot moth.
USDA Forest Service:
1961. Gas applicator used for dispensing small amounts of methyl bromide. European pine shoot moth control.
USDA Forest Service:
1961. Water is used with sand to seal a potential leak in the union of chamber jacket and ground cloth. Fumigation of European pine shoot moth.
USDA Forest Service:
1962. Moss processing for western hemlock looper eggs. Grinding moss. Portland, Oregon.
USDA Forest Service:
1962. Moss processing for western hemlock looper eggs. Seed-cleaning screen. Portland, Oregon.
USDA Forest Service:
1962. Moss processing for western hemlock looper eggs. Moss after screening. Portland, Oregon.
USDA Forest Service:
1962. Moss processing for western hemlock looper eggs. Moss after aspirating. Portland, Oregon.
USDA Forest Service:
1962. The various stages of processsed moss expected to yield western hemlock looper eggs. Process starts with 1 pound of air-dried moss, seed-cleaner processed moss; screened moss; and aspirator processed moss. Sellwood Lab, Portland, Oregon.
USDA Forest Service:
1962. Moss processing for western hemlock looper eggs. Moss after each processing step. Portland, Oregon.
USDA Forest Service:
c.1962. Rust-red string rot caused by Indian paint fungus.
USDA Forest Service:
1962. Newly-grafted Douglas-fir. Dennis Ahl Seed Orchard. Shelton, Washington.
USDA Forest Service:
1962. 5-cone cluster of second-year western white pine (Pinus monticola) cones. Cones such as these are often attacked and killed by larvae of cone moths. Midway Guard Station. Gifford Pinchot National Forest, Washington.
USDA Forest Service:
1962. Seasonal assistant Darrell Barstow examining Scolytus ventralis galleries on recently killed Abies concolor. Warner Ranger District. Fremont National Forest, Oregon.
USDA Forest Service:
1962. Sorting western spruce budworm larvae. Goldendale, Washington.
