1955. Forest pathologists Drs. T.W. Childs and J. Clark (PNFRES) examine section from butt of 180 y.o. Douglas-fir infested with Poria weirii.

Forest pathologists Drs. T.W. Childs and J. Clark (Pacific Northwest Forest and Range Experiment Station) examine section from butt of 180 year old Douglas-fir infested with Poria weirii.

 

Photo by: Ken H. Wright

Date: August 5, 1955

 

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

Collection: Portland Station Collection; La Grande, Oregon.

Image: PS-1122

 

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 Western International Forest Disease Work Conference information see: www.wifdwc.org/

 

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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