Compassman at work in the field. Western pine beetle control. Forest Service staff compasses were used. Compass lines were run through the sections at intervals of 10 chains. A spotter accompanied the compassman on each side. Infested trees were marked and spots were located on 4-inch scale section plots by compassman. Physical features, broods, trails, and springs were also spotted by compassman. Number 3. Southern Oregon Northern California beetle control project.
Photo by: J.E. Patterson Date: June 1922
Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-2306
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 related historical information see: www.treesearch.fs.fed.us/pubs/21476 Wickman, Boyd E. 2005. Harry E. Burke and John M. Miller, pioneers in Western forest entomology. General Technical Report. PNW-GTR-638. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 163 p.