1955. Adult (A), eggs (E), and woolly exudation (C) of balsam woolly adelgid (Chermes sp.) on Pacific silver fir. Toutle River, Washington. (40087022942)

Adult (A), eggs (E), and woolly exudation (C) of balsam woolly adelgid (Chermes sp.) on Pacific silver fir. Toutle River, Washington.
Photo by: R.B. Pope and Ken H. Wright
Date: 1955
Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection.
Collection: Portland Station Collection; La Grande, Oregon.
Image: PS-1013
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: <a href="https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/fsbdev2_043667.pdf" www.fs.usda.gov/Internet/FSE_DOCUMENTS/fsbdev2_043667.pdf</a>
To learn more about this photo collection see:
Wickman, B.E., Torgersen, T.R. and Furniss, M.M. 2002. Photographic images and history of forest insect investigations on the Pacific Slope, 1903-1953. Part 2. Oregon and Washington. American Entomologist, 48(3), p. 178-185.
For additional historic forest entomology photos, stories, and resources see the Western Forest Insect Work Conference site: <a href="http://wfiwc.org/content/history-and-resources" wfiwc.org/content/history-and-resources</a>
Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection: <a href="https://www.fs.usda.gov/main/r6/forest-grasslandhealth" www.fs.usda.gov/main/r6/forest-grasslandhealth</a>

Public domainPublic domainfalsefalse

This image or file is a work of a United States Department of Agriculture employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.

English ∙ español ∙ Nederlands ∙ slovenščina ∙ Tiếng Việt ∙ македонски ∙ русский ∙ українська ∙ 日本語 ∙ +/−