Class 4B. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Portland Station Collection; La Grande, Oregon. Image: PS-224 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...
Topics: fpkeen, divisionofforestinsectinvestigations, Keen Ponderosa Pine Tree Classifications,...
Class 4C. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Portland Station Collection; La Grande, Oregon. Image: PS-236 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...
Topics: fpkeen, divisionofforestinsectinvestigations, foresthealthprotection, usda, keenclassification,...
Class 4C. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Portland Station Collection; La Grande, Oregon. Image: PS-229 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...
Topics: fpkeen, divisionofforestinsectinvestigations, foresthealthprotection, usda, keenclassification,...
Class 4B. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Portland Station Collection; La Grande, Oregon. Image: PS-228 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...
Topics: fpkeen, divisionofforestinsectinvestigations, ps228, foresthealthprotection, usda,...
Class 3A. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Portland Station Collection; La Grande, Oregon. Image: PS-242 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...
Topics: fpkeen, divisionofforestinsectinvestigations, foresthealthprotection, usda, keenclassification,...
Class 1A. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Portland Station Collection; La Grande, Oregon. Image: PS-231 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...
Topics: fpkeen, divisionofforestinsectinvestigations, class1a, foresthealthprotection, usda,...
Tree Selection. Class 2B and Class 2D. Keen Ponderosa Pine Tree Classification. Fremont National Forest, Oregon. Photo by: Ray Filloon Date: June 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Ray Filloon Collection; La Grande, Oregon. Image: Filloon-373 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...
Topics: r6, fremontnationalforest, usda, stateandprivateforestry, treeselection, region6,...
Class 3B. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Portland Station Collection; La Grande, Oregon. Image: PS-235 and BUR-8735 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...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, bur8735, foresthealth,...
Class 4C (group). Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Portland Station Collection; La Grande, Oregon. Image: PS-244 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...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, foresthealth, region6,...
Tree Selection. Class 3A. Keen Ponderosa Pine Tree Classification. Fremont National Forest, Oregon. Photo by: Ray Filloon Date: June 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Ray Filloon Collection; La Grande, Oregon. Image: Filloon-382 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...
Topics: r6, fremontnationalforest, usda, stateandprivateforestry, treeselection, age, region6,...
Tree Selection. Class 4D. Keen Ponderosa Pine Tree Classification. Fremont National Forest, Oregon. Photo by: Ray Filloon Date: June 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Ray Filloon Collection; La Grande, Oregon. Image: Filloon-381 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...
Topics: r6, fremontnationalforest, usda, stateandprivateforestry, age, region6, forestinsectinvestigations,...
Class 3C. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Portland Station Collection; La Grande, Oregon. Image: PS-222 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...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, foresthealth, region6,...
Class 2C. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-8712 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....
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, tree,...
Class 3A. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-8734 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....
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, bur8734, treeselection,...
Class 3C and 2C. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology and Portland Station Collections; La Grande, Oregon. Image: PS-239 and BUR-8716 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...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, bur8716, foresthealth,...
Tree Selection. Class 4C. Keen Ponderosa Pine Tree Classification. Fremont National Forest, Oregon. Photo by: Ray Filloon Date: June 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Ray Filloon Collection; La Grande, Oregon. Image: Filloon-369 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...
Topics: r6, fremontnationalforest, usda, stateandprivateforestry, treeselection, tree, region6,...
Gasoline pump used in root washing work. Klamath Basin near Bly, Oregon. Photo by: W.D. Bedard Date: October 15, 1941 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology and Portland Station Collections; La Grande, Oregon. Image: BUR-8887 and PS-547 From Biology and Control of the Western Pine Beetle, pages 163-164: In 1941 Bedard used hydraulic pressure to wash out the root systems of six ponderosa pines...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, gasoline, foresthealth,...
Class 2B. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology and Portland Station Collections; La Grande, Oregon. Image: PS-219 and BUR-8711 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...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, keen, foresthealth,...
Tree Selection. Class 4D. Keen Ponderosa Pine Tree Classification. Fremont National Forest, Oregon. Photo by: Ray Filloon Date: June 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Ray Filloon Collection; La Grande, Oregon. Image: Filloon-370 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...
Topics: r6, fremontnationalforest, usda, stateandprivateforestry, treeselection, age, region6,...
Class 1A. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-8701 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....
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, age,...
Tree Selection. Class 4C. Keen Ponderosa Pine Tree Classification. Fremont National Forest, Oregon. Photo by: Ray Filloon Date: June 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Ray Filloon Collection; La Grande, Oregon. Image: Filloon-372 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...
Topics: r6, fremontnationalforest, usda, stateandprivateforestry, treeselection, age, region6,...
Tree Selection. Class 1A. Keen Ponderosa Pine Tree Classification. Fremont National Forest, Oregon. Photo by: Ray Filloon Date: June 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Ray Filloon Collection; La Grande, Oregon. Image: Filloon-374 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...
Topics: r6, fremontnationalforest, usda, stateandprivateforestry, treeselection, age, region6, class1a,...
Tree Selection. Class 4B. Keen Ponderosa Pine Tree Classification. Fremont National Forest, Oregon. Photo by: Ray Filloon Date: June 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Ray Filloon Collection; La Grande, Oregon. Image: Filloon-371 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...
Topics: r6, fremontnationalforest, usda, stateandprivateforestry, treeselection, tree, region6,...
Ponderosa pine. Risk 1, Keen Class 3A, Dunning 3. Blacks Mountain, California. Photo by: N.D. Wygant Date: October 1941 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-13101 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,...
Topics: susceptibility, keen3a, usda, bureauofentomologyandplantquarantine, tree, pinusponderosa,...
Class 1C. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology and Portland Station Collections; La Grande, Oregon. Image: PS-248 and BUR-8704 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...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, age,...
Class 4C or 3C. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Portland Station Collection; La Grande, Oregon. Image: PS-223 and BUR-8739 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...
Topics: divisionofforestinsectinvestigations, r6, bur8739, usda, stateandprivateforestry, class4cor3c,...
Tree Selection. Class 4A. Keen Ponderosa Pine Tree Classification. Fremont National Forest, Oregon. Photo by: Ray Filloon Date: June 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Ray Filloon Collection; La Grande, Oregon. Image: Filloon-378 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...
Topics: r6, fremontnationalforest, usda, stateandprivateforestry, treeselection, age, region6,...
Tree Selection. Class 3B. Keen Ponderosa Pine Tree Classification. Fremont National Forest, Oregon. Photo by: Ray Filloon Date: June 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Ray Filloon Collection; La Grande, Oregon. Image: Filloon-380 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...
Topics: r6, fremontnationalforest, usda, stateandprivateforestry, treeselection, age, region6,...
Class 1B. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-8703 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....
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, age,...
Tree Selection. Class 2B. Keen Ponderosa Pine Tree Classification. Fremont National Forest, Oregon. Photo by: Ray Filloon Date: June 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Ray Filloon Collection; La Grande, Oregon. Image: Filloon-375 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...
Topics: r6, fremontnationalforest, usda, stateandprivateforestry, treeselection, tree, region6,...
Class 1A and 1D. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-8700 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,...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, age,...
Class 2D and Class 3D. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology and Portland Station Collections; La Grande, Oregon. Image: BUR-8718 and PS-246 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...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, age,...
Class 1B and Class 2B. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-8702 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,...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, age,...
Class 4D and 4C. Keen Ponderosa Pine Tree Classification. Camp Sherman, Oregon. Photo by: F.P. Keen Date: August 3, 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Portland Station Collection; La Grande, Oregon. Image: PS-415 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...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, tree, keen,...
Class 2A and Class 1C. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology and Portland Station Collections; La Grande, Oregon. Image: PS-247 and BUR-8705 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...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, age,...
Tree Selection. Class 3B and Class 3C. Keen Ponderosa Pine Tree Classification. Fremont National Forest, Oregon. Photo by: Ray Filloon Date: June 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Ray Filloon Collection; La Grande, Oregon. Image: Filloon-383 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...
Topics: r6, fremontnationalforest, usda, stateandprivateforestry, treeselection, tree, region6,...
Class 3A. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology and Portland Station Collections; La Grande, Oregon. Image: PS-245 and BUR-8733 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...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, age,...
Class 3C and Class 2C. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-8716 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,...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, tree,...
Ponderosa pine. Risk 4, Keen Class 3C, Dunning 4. Blacks Mountain, California. Photo by: N.D. Wygant Date: October 1941 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-13108 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,...
Topics: susceptibility, keen3c, usda, bureauofentomologyandplantquarantine, tree, pinusponderosa, ndwygant,...
Class 4C. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology and Portland Station Collections; La Grande, Oregon. Image: PS-237 and BUR-8756 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...
Topics: susceptibility, divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry,...
Class 4D. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology and Portland Station Collections; La Grande, Oregon. Image: PS-218 and BUR-8764 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...
Topics: susceptibility, divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry,...
Class 3C. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology and Portland Station Collections; La Grande, Oregon. Image: PS-240 and BUR-8748 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...
Topics: susceptibility, divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry,...
Ponderosa pine. Risk 1, Keen Class 3A, Dunning 3. Blacks Mountain, California. Photo by: N.D. Wygant Date: October 1941 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-13109 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,...
Topics: susceptibility, keen3a, usda, bureauofentomologyandplantquarantine, tree, pinusponderosa, ndwygant,...
In the Portland Station Collection's documentation, this image is classified as Class 4B or Class 3B. It's also documented this way in the Bureau of Entomology Collection's documentation, but then those are crossed out and replaced with a Class 3C Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology and Portland Station...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, bur8736, treeselection,...
Class 2B-C (group). Keen Ponderosa Pine Tree Classification. Camp Sherman, Oregon. Photo by: F.P. Keen Date: August 3, 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology and Portland Station Collections; La Grande, Oregon. Image: PS-417 and BUR-8884 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...
Topics: susceptibility, divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, age,...
Ponderosa pine. Risk 1, Keen Class 4A, Dunning 5A. Blacks Mountain, California. Photo by: N.D. Wygant Date: October 1941 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-13110 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,...
Topics: susceptibility, usda, bureauofentomologyandplantquarantine, tree, pinusponderosa, dunning5a,...
Class 4A. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology and Portland Station Collections; La Grande, Oregon. Image: PS-230 and BUR-8751 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...
Topics: susceptibility, divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry,...
Class 3A in Keen's ponderosa pine tree classification, used for comparison of bark beetle susceptibility classes based on age and vigor. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-8710 To learn more about this photo collection see: Wickman, B.E., Torgersen, T.R. and Furniss, M.M. 2002. Photographic images and...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, age, bur8710,...
Ponderosa pine. Risk 4, Keen 4B, Dunning 5. Blacks Mountain, California. Photo by: Bongberg Date: October 1942 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-11690b 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,...
Topics: susceptibility, usda, bureauofentomologyandplantquarantine, treeselection, tree, pinusponderosa,...
Class 3C-D (group). Keen Ponderosa Pine Tree Classification. Camp Sherman, Oregon. Photo by: F.P. Keen Date: August 3, 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology and Portland Station Collections; La Grande, Oregon. Image: PS-418 and BUR-8885 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...
Topics: susceptibility, divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry,...
