Lia Spiegel and Dave Shaw (Oregon State University) evaluate the effects of pine butterfly defoliation. Malheur National Forest, Oregon.
Photo by: Rob Flowers
Date: August 15, 2016
Photo credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection, Central Oregon Insect and Disease Service Center.
Source: Rob Flowers collection. Bend, Oregon.
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection:
www.fs.usda.gov/main/r6/forest-grasslandhealth