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• 1. [Article] Evaluation of mountain pine beetle infestation, Wolf Mountains, Crow Indian Reservation, Montana, 1973

  Citation × Citation Citation Abstract Copy Title: Evaluation of mountain pine beetle infestation, Wolf Mountains, Crow Indian Reservation, Montana, 1973 Author: McGregor, Mark D., Kohler, Steve, United States. Forest Service. Northern Region. State & Private Forestry Title: Evaluation of mountain pine beetle infestation, Wolf Mountains, Crow Indian Reservation, Montana, 1973 Author: McGregor, Mark D., Kohler, Steve, United States. Forest Service. Northern Region. State & Private Forestry Close

• 2. [Article] Mountain pine beetle impact survey on the Ninemile District, Lolo National Forest, and surrounding state and private lands

  The mountain pine beetle, Dendroetonus ponderosae Hopk., has been at epidemic levels in second-growth ponderosa pine stands in the Ninemile area of the Lolo National Forest and surrounding private lands ...

  Citation × Citation Citation Abstract Copy Title: Mountain pine beetle impact survey on the Ninemile District, Lolo National Forest, and surrounding state and private lands Author: McGregor, Mark D., Kohler, Steve, Bousfield, Wayne E., United States. Forest Service. Northern Region. State & Private Forestry The mountain pine beetle, Dendroetonus ponderosae Hopk., has been at epidemic levels in second-growth ponderosa pine stands in the Ninemile area of the Lolo National Forest and surrounding private lands since 1969. An impact survey, using two levels of photography and a small ground sample, was conducted to estimate a loss of 592,469 board feet IP of ponderosa pine on 2,592 acres of infested land. The infestation is expected to continue at about the same level in 1973. Title: Mountain pine beetle impact survey on the Ninemile District, Lolo National Forest, and surrounding state and private lands Author: McGregor, Mark D., Kohler, Steve, Bousfield, Wayne E., United States. Forest Service. Northern Region. State & Private Forestry The mountain pine beetle, Dendroetonus ponderosae Hopk., has been at epidemic levels in second-growth ponderosa pine stands in the Ninemile area of the Lolo National Forest and surrounding private lands since 1969. An impact survey, using two levels of photography and a small ground sample, was conducted to estimate a loss of 592,469 board feet IP of ponderosa pine on 2,592 acres of infested land. The infestation is expected to continue at about the same level in 1973. Close

• 3. [Article] Evaluation of mountain pine beetle infestations, Wolf Mountains, Crow Indian Reservation, Montana, 1973

  Mountain pine beetle reached epidemic levels in second-growth ponderosa pine stands on Bureau of Indian Affairs and private lands on the Crow Indian Reservation. Approximately 9,106 trees containing 420,266 ...

  Citation × Citation Citation Abstract Copy Title: Evaluation of mountain pine beetle infestations, Wolf Mountains, Crow Indian Reservation, Montana, 1973 Author: United States. Forest Service. Northern Region. State & Private Forestry, Kohler, Steve, McGregor, Mark D., Ferry, Gardner Mountain pine beetle reached epidemic levels in second-growth ponderosa pine stands on Bureau of Indian Affairs and private lands on the Crow Indian Reservation. Approximately 9,106 trees containing 420,266 merchantable board feet were killed from 1971 to 1973. This is about 24 percent of the merchantable ponderosa pine in stands surveyed. Stands are stagnated, and trees appear stressed which is probably predisposing them to beetle attack. An increase in size of area infested and number of trees killed is expected in 1974. Commercial thinning to remove infested trees and reduce basal area is recommended to alleviate the problem. Slash disposal is highly recommended during logging to prevent buildup of pine engraver beetle populations. Title: Evaluation of mountain pine beetle infestations, Wolf Mountains, Crow Indian Reservation, Montana, 1973 Author: United States. Forest Service. Northern Region. State & Private Forestry, Kohler, Steve, McGregor, Mark D., Ferry, Gardner Mountain pine beetle reached epidemic levels in second-growth ponderosa pine stands on Bureau of Indian Affairs and private lands on the Crow Indian Reservation. Approximately 9,106 trees containing 420,266 merchantable board feet were killed from 1971 to 1973. This is about 24 percent of the merchantable ponderosa pine in stands surveyed. Stands are stagnated, and trees appear stressed which is probably predisposing them to beetle attack. An increase in size of area infested and number of trees killed is expected in 1974. Commercial thinning to remove infested trees and reduce basal area is recommended to alleviate the problem. Slash disposal is highly recommended during logging to prevent buildup of pine engraver beetle populations. Close