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 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 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 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,...
Photos show Keen's ponderosa pine tree classification - for comparison of bark beetle susceptibility classes based on age and vigor. For more, see: Miller, John Martin, and Frederick Paul Keen. Biology and control of the western pine beetle: a summary of the first fifty years of research. No. 800. US Department of Agriculture, 1960. archive.org/details/biologycontrolof800mill For more about Keen's classifications see: www.fs.fed.us/psw/publications/ecology_of.../psw_1943_kee... Photo by:...
Topics: susceptibility, Early Beetle Control Efforts - 1910-1961, r6, usda, stateandprivateforestry, age,...
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,...
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,...
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 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 3A. 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-414 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, treeselection, tree, keen,...
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 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,...
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,...
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,...
Class 4B and 2A. 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-410 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 3A; Keen Ponderosa Pine Tree Classification. Risk 1; California Pine Risk-Rating System. 38" DBH leave tree. Colville Indian Reservation, Washington. Photo by: Robert L. Furniss Date: September 29, 1946 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-734 To learn more about this photo collection see: Wickman, B.E., Torgersen, T.R....
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, tree, keen,...
Class 3B. 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-412 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, treeselection, tree, keen,...
Drawing shows Keen's ponderosa pine tree classification - for comparison of bark beetle susceptibility classes based on age and vigor. For more, see: Miller, John Martin, and Frederick Paul Keen. Biology and control of the western pine beetle: a summary of the first fifty years of research. No. 800. US Department of Agriculture, 1960. archive.org/details/biologycontrolof800mill For more about Keen's classifications see: www.fs.fed.us/psw/publications/ecology_of.../psw_1943_kee... Artist: Roaf...
Topics: r6, usda, stateandprivateforestry, age, drawing, Forest Insect Art, barkbeetlesusceptibility,...
Class 3C (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, Portland Station Collection; La Grande, Oregon. Image: PS-416 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 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-221 and BUR-8763 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 3B; Keen Ponderosa Pine Tree Classification. Risk 1; California Pine Risk-Rating System. 36" DBH leave tree. Colville Indian Reservation, Washington. Photo by: Robert L. Furniss Date: September 29, 1946 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-733 To learn more about this photo collection see: Wickman, B.E., Torgersen, T.R....
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, tree, keen,...
