Drawing shows life stages and feeding methods of the balsam woolly adelgid, Chermes piceae (Ratz.). Artist: Norman E. Johnson Photo by: Wally C. Guy Date: April 1957 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Portland Station Collection; La Grande, Oregon. Image: PS-1673 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....
Topics: chermespiceae, april1957, foresthealthprotection, usda, stateandprivateforestry, pnw, nejohnson,...
Norman E. Johnson with root wads of old-growth Douglas-fir windfalls near Camp McDonald, Washington. These trees were heavily infested by Douglas-fir beetle in 1959. Photo by: Peter W. Orr Date: 1959 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Portland Station Collection; La Grande, Oregon. Image: PS-2287 To learn more about this photo collection see: Wickman, B.E., Torgersen, T.R. and Furniss, M.M. 2002. Photographic...
Topics: usda, peterworr, stateandprivateforestry, windfall, normejohnson, washington, usfs, blowdown,...
Dr. N.E. Johnson addressing Western Forest Insect Work Conference (the morning after annual banquet). Meeting held March 4-6, 1963. Sheraton Hotel, Portland, Oregon. Photo by: Wally C. Guy Date: March 4, 1963 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Portland Station Collection; La Grande, Oregon. Image: PS-2792 For additional historic forest entomology photos, stories, and resources see the Western Forest Insect...
Topics: wfiwc, sheratonhotel, foresthealthprotection, usda, stateandprivateforestry, Forest Entomology,...
Norman E. Johnson sampling Douglas-fir beetle population in an old-growth, exposed windfall. McDonald Tree Farm, Washington. Photo by: Peter W. Orr Date: September 1959 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Portland Station Collection; La Grande, Oregon. Image: PS-2308 For additional historic forest entomology photos, stories, and resources see the Western Forest Insect Work Conference site:...
Topics: usda, stateandprivateforestry, johnson, windfall, foresthealth, washington, usfs, blowdown,...
