1934. Discoloration caused by absorption of mercuric chloride solution in green Douglas-fir, 12 inches above saw cut. Tree medication studies. Jewell, Oregon.

Discoloration caused by absorption of mercuric chloride solution in green Douglas-fir, 12 inches above saw cut. Tree medication studies. Jewell, Oregon.

 

Photo by: J. Whiteside

Date: January 19, 1934

 

Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection.

Collection: Bureau of Entomology Collection; La Grande, Oregon.

Image: BUR-8850

 

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 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

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