Abies lasiocarpa killed by balsam woolly adelgid. Wind River Arboretum. Carson, Washington.
Photo by: R.E. Balch and N.B. Fredericton
Date: July 1958
Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection.
Collection: Portland Station Collection; La Grande, Oregon.
Image: PS-2997
For more, see The Balsam Woolly Aphid Problem in Oregon and Washington, Research Paper Number 18. 1957. Pacific Northwest Forest and Range Experiment Station. Portland, Oregon:
www.fs.fed.us/pnw/pubs/pnw_os_rp-18.pdf For additional historic forest entomology photos, stories, and resources see the Western Forest Insect Work Conference site:
wfiwc.org/content/history-and-resources Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection:
www.fs.usda.gov/main/r6/forest-grasslandhealth
