Forest pathologist Jim Hadfield (center) conducting a training session.
Photo by: Unknown
Date: c.1980
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: Region 6, Forest Health Protection slide collection; Regional Office, Portland, Oregon.
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection:
www.fs.usda.gov/main/r6/forest-grasslandhealth