1983. White pine blister rust index calculation in the field.
White pine blister rust index calculation in the field.
Photo by: Unknown
Date: 1983
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Collection: FHP slide collection; Regional Office, Portland, Oregon.
Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
1983. White pine blister rust index calculation in the field.
White pine blister rust index calculation in the field.
Photo by: Unknown
Date: 1983
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Collection: FHP slide collection; Regional Office, Portland, Oregon.
Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth