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• 1. [Article] Evaluation of a mountain pine beetle infestation, Stoney Creek, Ninemile District, Lolo National Forest, 1975

  Mountain pine beetle populations reached epidemic levels in 1972 in the Stoney Creek drainage, Ninemile District, Lolo National Forest, Montana. A total of 8,082 trees with an estimated volume loss of 34,356 ...

  Citation × Citation Citation Abstract Copy Title: Evaluation of a mountain pine beetle infestation, Stoney Creek, Ninemile District, Lolo National Forest, 1975 Author: McGregor, Mark D., Shipe, Tilford C., United States. Forest Service. Northern Region. State & Private Forestry Mountain pine beetle populations reached epidemic levels in 1972 in the Stoney Creek drainage, Ninemile District, Lolo National Forest, Montana. A total of 8,082 trees with an estimated volume loss of 34,356 board feet has occurred from 1972 to 1974. Buildup ratio was 1:1.2 from 1972 to 1973, and 1:1.8 from 1973 to 1974. Losses are expected to increase in 1975. Commercial thinning is recommended in unthinned stands. Title: Evaluation of a mountain pine beetle infestation, Stoney Creek, Ninemile District, Lolo National Forest, 1975 Author: McGregor, Mark D., Shipe, Tilford C., United States. Forest Service. Northern Region. State & Private Forestry Mountain pine beetle populations reached epidemic levels in 1972 in the Stoney Creek drainage, Ninemile District, Lolo National Forest, Montana. A total of 8,082 trees with an estimated volume loss of 34,356 board feet has occurred from 1972 to 1974. Buildup ratio was 1:1.2 from 1972 to 1973, and 1:1.8 from 1973 to 1974. Losses are expected to increase in 1975. Commercial thinning is recommended in unthinned stands. Close

• 2. [Article] Effect of thinning second-growth ponderosa pine on incidence of mountain pine beetle infestation : establishment report

  Citation × Citation Citation Abstract Copy Title: Effect of thinning second-growth ponderosa pine on incidence of mountain pine beetle infestation : establishment report Author: McGregor, Mark D., United States. Forest Service. Northern Region. State & Private Forestry Title: Effect of thinning second-growth ponderosa pine on incidence of mountain pine beetle infestation : establishment report Author: McGregor, Mark D., United States. Forest Service. Northern Region. State & Private Forestry Close

• 3. [Article] Evaluation of mountain pine beetle infestations, Lazier and Meadow Creek drainages, Plains District, Lolo National Forest, Montana, 1975

  Mountain pine beetle reached epidemic levels in the Lazier-Meadow Creek drainages on mixed ownership in 1972. A total of 118,486 trees with an estimated volume of 5,666,124 board feet was killed from 1972 ...

  Citation × Citation Citation Abstract Copy Title: Evaluation of mountain pine beetle infestations, Lazier and Meadow Creek drainages, Plains District, Lolo National Forest, Montana, 1975 Author: United States. Forest Service. Northern Region. Forest Environmental Protection, McGregor, Mark D., United States. Forest Service. Northern Region. State & Private Forestry Mountain pine beetle reached epidemic levels in the Lazier-Meadow Creek drainages on mixed ownership in 1972. A total of 118,486 trees with an estimated volume of 5,666,124 board feet was killed from 1972 through 1974. Presence of overstocked, mature, nearly pure lodgepole stands, coupled with favorable weather conditions, are believed to be responsible for outbreak development. Prompt salvage logging of infested and susceptible trees, and conversion to a mixed species stand, compatible with the designated habitat type and site index, are recommended to alter the course of the outbreak. Title: Evaluation of mountain pine beetle infestations, Lazier and Meadow Creek drainages, Plains District, Lolo National Forest, Montana, 1975 Author: United States. Forest Service. Northern Region. Forest Environmental Protection, McGregor, Mark D., United States. Forest Service. Northern Region. State & Private Forestry Mountain pine beetle reached epidemic levels in the Lazier-Meadow Creek drainages on mixed ownership in 1972. A total of 118,486 trees with an estimated volume of 5,666,124 board feet was killed from 1972 through 1974. Presence of overstocked, mature, nearly pure lodgepole stands, coupled with favorable weather conditions, are believed to be responsible for outbreak development. Prompt salvage logging of infested and susceptible trees, and conversion to a mixed species stand, compatible with the designated habitat type and site index, are recommended to alter the course of the outbreak. Close

• 4. [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

• 5. [Article] Status of mountain pine beetle infestations on the Superior Ranger District, Lolo National Forest, St. Regis, Montana

  A mountain pine beetle infestation has been active in the St. Regis area since 1964. Heaviest tree mortality occurred during the period 1969-70. The infestation has continued to decline since 1970. Over 2 ...

  Citation × Citation Citation Abstract Copy Title: Status of mountain pine beetle infestations on the Superior Ranger District, Lolo National Forest, St. Regis, Montana Author: United States. Forest Service. Northern Region. State & Private Forestry, McGregor, Mark D. A mountain pine beetle infestation has been active in the St. Regis area since 1964. Heaviest tree mortality occurred during the period 1969-70. The infestation has continued to decline since 1970. Over 2 million board feet of lodgepole and ponderosa pine were killed during the outbreak. Overstocking resulted in slow growth which probably promoted a general weakening of the stand, making some trees more susceptible to attack by mountain pine beetle. Two factors that might be contributing to the decline of the outbreak are: 1. The influence of Ips spp. drying out the cambial area in infested trees. 2. The average size of trees being attacked is less than 10 inches d.b.h., resulting in fewer beetles emerging from infested trees than parent adults that attacked. Title: Status of mountain pine beetle infestations on the Superior Ranger District, Lolo National Forest, St. Regis, Montana Author: United States. Forest Service. Northern Region. State & Private Forestry, McGregor, Mark D. A mountain pine beetle infestation has been active in the St. Regis area since 1964. Heaviest tree mortality occurred during the period 1969-70. The infestation has continued to decline since 1970. Over 2 million board feet of lodgepole and ponderosa pine were killed during the outbreak. Overstocking resulted in slow growth which probably promoted a general weakening of the stand, making some trees more susceptible to attack by mountain pine beetle. Two factors that might be contributing to the decline of the outbreak are: 1. The influence of Ips spp. drying out the cambial area in infested trees. 2. The average size of trees being attacked is less than 10 inches d.b.h., resulting in fewer beetles emerging from infested trees than parent adults that attacked. Close