Subalpine fir with balsam woolly adelgid damage. Hurricane Ridge, Olympic National Park, Washington. Photo taken while ground-checking aerial detection survey data.
Photo by: Justin Hof
Date: July 20, 2017
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: Aerial Survey Program collection.
For a related story with this photo see the 2017 Washington Aerial Survey Storymap here:
usfs.maps.arcgis.com/apps/MapJournal/index.html?appid=aa8... For geospatial data collected during annual aerial forest insect and disease detection surveys see:
www.fs.usda.gov/detail/r6/forest-grasslandhealth/insects-... For more about the balsam woolly adelgid see: Ragenovich, I.R. and R.G. Mitchell. 2006. Balsam Woolly Adelgid. Forest Insect and Disease Leaflet 118. USDA Forest Service, available here:
www.fs.usda.gov/Internet/FSE_DOCUMENTS/fsbdev2_043667.pdf Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection:
www.fs.usda.gov/main/r6/forest-grasslandhealth
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