Douglas-fir tussock moth damage. Aerial view of heavily defoliated young true firs. King Mountain infestation. Malheur National Forest, Oregon.
See also:
www.flickr.com/photos/151887236@N05/42165522144/in/dateta... Photo by: Peter W. Orr
Date: October 1964
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: Division of Timber Management, Insect and Disease Control Branch Collection; Regional Office, Portland, Oregon.
Image: ID-369
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection:
www.fs.usda.gov/main/r6/forest-grasslandhealth