1945. Understory conditions on hemlock looper control area. Clatsop County, Oregon.
Understory conditions on hemlock looper control area. Clatsop County, Oregon.
Photo by: F.P. Keen
Date: June 14, 1945
Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection.
Collection: Portland Station Collection; La Grande, Oregon.
Image: PS-658
To learn more about this photo collection see:
Wickman, B.E., Torgersen, T.R. and Furniss, M.M. 2002. Photographic images and history of forest insect investigations on the Pacific Slope, 1903-1953. Part 2. Oregon and Washington. American Entomologist, 48(3), p. 178-185.
For more information about this project see:
archive.org/details/su1945ddt00unit
Craighead, F.C. and R.C. Brown. 1945. Summary of 1945 DDT investigations for control of forest insects with special reference to aerial applications. USDA Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, Division of Forest Insect Investigations. 15 p.
For additional historical forest entomology photos, stories, and resources see the Western Forest Insect Work Conference site: wfiwc.org/content/history-and-resources
Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
1945. Understory conditions on hemlock looper control area. Clatsop County, Oregon.
Understory conditions on hemlock looper control area. Clatsop County, Oregon.
Photo by: F.P. Keen
Date: June 14, 1945
Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection.
Collection: Portland Station Collection; La Grande, Oregon.
Image: PS-658
To learn more about this photo collection see:
Wickman, B.E., Torgersen, T.R. and Furniss, M.M. 2002. Photographic images and history of forest insect investigations on the Pacific Slope, 1903-1953. Part 2. Oregon and Washington. American Entomologist, 48(3), p. 178-185.
For more information about this project see:
archive.org/details/su1945ddt00unit
Craighead, F.C. and R.C. Brown. 1945. Summary of 1945 DDT investigations for control of forest insects with special reference to aerial applications. USDA Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, Division of Forest Insect Investigations. 15 p.
For additional historical forest entomology photos, stories, and resources see the Western Forest Insect Work Conference site: wfiwc.org/content/history-and-resources
Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth