Forest entomologist Paul E. Buffam making population counts of Chermes (Balsam woolly adelgid). Microscope is held by a tripod. Willamette Pass, Oregon.
Photo by: R.G. Mitchell Date: September 1958
Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Portland Station Collection; La Grande, Oregon. Image: PS-2084
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.