Douglas-fir tussock moth caused defoliation along I-84 north of La Grande, Oregon.
Photo by: Unknown
Date: 1974
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection, Wenatchee Insect and Disease Service Center
Collection: Jim Hadfield photo collection; Wenatchee, Washington
Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection:
www.fs.usda.gov/main/r6/forest-grasslandhealth