Mountain pine beetle in lodgepole pine. Deschutes National Forest, Oregon.
Photo by: William M. Ciesla
Date: 1989
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: William M. Ciesla collection; Fort Collins, Colorado.
Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection:
www.fs.usda.gov/main/r6/forest-grasslandhealth