Forest entomologist Beth Willhite leads an expedition to investigate the cause of tree mortality.
Photo by: Unknown
Date: July 25, 2014
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection, Westside Forest Insect and Disease Service Center.
Source: Kristen Chadwick collection; Sandy, Oregon.
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection:
www.fs.usda.gov/main/r6/forest-grasslandhealth
