Orgyia pseudotsugata egg masses being tied to branches of fir trees. These egg masses were used as traps for Douglas-fir tussock moth egg parasite work. Predator information was also obtained. T.R. Torgersen in photograph. Photo by: H.G. Paul Date: November 1978 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Portland Station Collection; La Grande, Oregon. Image: PS-4444 Image provided by USDA Forest Service, Pacific...
Topics: defoliation, r6, usda, 1978, stateandprivateforestry, parasite, trtorgersen, region6, eggmass,...
H.G. Paul. Photo by: Unknown Date: c.1967 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Source: Portland Station Collection; La Grande, Oregon Image: PS-6023 Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
Topics: researchentomology, entomologist, foresthealthprotection, usda, stateandprivateforestry,...
Scientists of Research Work Unit (RWU) 2201 at entrance to PNW Forestry Sciences Lab, Corvallis, Oregon. Left to right: Richard R. Mason; Roger B. Ryan; Roy C. Beckwith; Torolf R. Torgersen; Russel G. Mitchell; Boyd E. Wickman (project leader). Photo by: H.G. Paul Date: 1975 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Portland Station Collection; La Grande, Oregon. Image: PS-6019 To learn more about this photo...
Topics: usda, 1975, russelgmitchell, usfs, forestservice, researchentomologist, rogerbryan, forest service,...
Orgyia pseudotsugata egg masses being tied to branches of fir trees. These egg masses were used as traps for Douglas-fir tussock moth egg parasite work. Predator information was also obtained. T.R. Torgersen in photograph. Photo by: H.G. Paul Date: November 1978 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Portland Station Collection; La Grande, Oregon. Image: PS-4443 Image provided by USDA Forest Service, Pacific...
Topics: r6, usda, 1978, stateandprivateforestry, foresthealthprotection, trtorgersen, region6, eggmass,...
Orgyia pseudotsugata egg masses being tied to branches of fir trees. These egg masses were used as traps for Douglas-fir tussock moth egg parasite work. Predator information was also obtained. T.R. Torgersen in photograph. Photo by: H.G. Paul Date: November 1978 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Portland Station Collection; La Grande, Oregon. Image: PS-4446 Image provided by USDA Forest Service, Pacific...
Topics: r6, usda, 1978, stateandprivateforestry, tree, parasite, trtorgersen, region6, eggmass, usfs,...
