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• 1. [Article] Status of mountain pine beetle, Northern Region, 1982

  Citation × Citation Citation Abstract Copy Title: Status of mountain pine beetle, Northern Region, 1982 Author: United States. Forest Service. Northern Region. Cooperative Forestry & Pest Management, Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Oakes, Robert D., McGregor, Mark D. Title: Status of mountain pine beetle, Northern Region, 1982 Author: United States. Forest Service. Northern Region. Cooperative Forestry & Pest Management, Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Oakes, Robert D., McGregor, Mark D. Close

• 2. [Article] Status of mountain pine beetle infestations, Northern Region, 1984

  Citation × Citation Citation Abstract Copy Title: Status of mountain pine beetle infestations, Northern Region, 1984 Author: McGregor, Mark D., United States. Forest Service. Northern Region. State & Private Forestry Title: Status of mountain pine beetle infestations, Northern Region, 1984 Author: McGregor, Mark D., United States. Forest Service. Northern Region. State & Private Forestry Close

• 3. [Article] Mountain pine beetle infestations in the northern region during 1985

  Citation × Citation Citation Abstract Copy Title: Mountain pine beetle infestations in the northern region during 1985 Author: United States. Forest Service. Northern Region. State & Private Forestry, Tunnock, Scott Title: Mountain pine beetle infestations in the northern region during 1985 Author: United States. Forest Service. Northern Region. State & Private Forestry, Tunnock, Scott Close

• 4. [Article] Mountain pine beetle impact survey, Ninemile Drainage, Lolo National Forest, and state and private lands, Montana, 1973

  The mountain pine beetle reached epidemic levels in second-growth 80-yearold ponderosa pine stands on the Ninemile Ranger District in 1969. The outbreak increased through 1971 and spread over 30,000 acres. ...

  Citation × Citation Citation Abstract Copy Title: Mountain pine beetle impact survey, Ninemile Drainage, Lolo National Forest, and state and private lands, Montana, 1973 Author: McGregor, Mark D., United States. Forest Service. Northern Region. State & Private Forestry The mountain pine beetle reached epidemic levels in second-growth 80-yearold ponderosa pine stands on the Ninemile Ranger District in 1969. The outbreak increased through 1971 and spread over 30,000 acres. Heavy infestation occurred on about 2,600 acres within this area. A two-stage survey was used during 1972 and 1973 to stratify the infestation, and obtain tree and volume loss estimates. This survey shows that about 109,284 trees were killed with an estimated volume loss of 613,743 board feet from 1970 to 1973. The outbreak has been declining since 1971. Surveys this year point toward a continued decline. However, some "hot spot" infestations will persist in pure,overstocked,second-growth stands. Commercial thinning is encouraged to release the stand, promote tree growth, and change the microenvironment, making it unattractive to mountain pine beetle. Title: Mountain pine beetle impact survey, Ninemile Drainage, Lolo National Forest, and state and private lands, Montana, 1973 Author: McGregor, Mark D., United States. Forest Service. Northern Region. State & Private Forestry The mountain pine beetle reached epidemic levels in second-growth 80-yearold ponderosa pine stands on the Ninemile Ranger District in 1969. The outbreak increased through 1971 and spread over 30,000 acres. Heavy infestation occurred on about 2,600 acres within this area. A two-stage survey was used during 1972 and 1973 to stratify the infestation, and obtain tree and volume loss estimates. This survey shows that about 109,284 trees were killed with an estimated volume loss of 613,743 board feet from 1970 to 1973. The outbreak has been declining since 1971. Surveys this year point toward a continued decline. However, some "hot spot" infestations will persist in pure,overstocked,second-growth stands. Commercial thinning is encouraged to release the stand, promote tree growth, and change the microenvironment, making it unattractive to mountain pine beetle. Close

• 5. [Article] Permanent mountain pine beetle population trend plots : an update, 1981

  Six Montana areas in which permanent mountain pine beetle trend plots were established in 1979 were revisited in 1980. Results of the visit show infestation intensity decreased significantly in Centennial ...

  Citation × Citation Citation Abstract Copy Title: Permanent mountain pine beetle population trend plots : an update, 1981 Author: United States. Forest Service. Northern Region. State & Private Forestry, Gibson, K. E. (Kenneth E.) Six Montana areas in which permanent mountain pine beetle trend plots were established in 1979 were revisited in 1980. Results of the visit show infestation intensity decreased significantly in Centennial Valley, decreased slightly in the Madison River plot area, and increased almost threefold in the Murr Creek area. Beetle populations remained essentially static in Boulder Creek, Dunsire Creek, and near Spotted Bear. Title: Permanent mountain pine beetle population trend plots : an update, 1981 Author: United States. Forest Service. Northern Region. State & Private Forestry, Gibson, K. E. (Kenneth E.) Six Montana areas in which permanent mountain pine beetle trend plots were established in 1979 were revisited in 1980. Results of the visit show infestation intensity decreased significantly in Centennial Valley, decreased slightly in the Madison River plot area, and increased almost threefold in the Murr Creek area. Beetle populations remained essentially static in Boulder Creek, Dunsire Creek, and near Spotted Bear. Close

• 6. [Article] Establishment report : permanent mountain pine beetle population trend plots, Montana, 1979

  Thirty permanent mountain pine beetle population trend plots were established in each of six areas in the state in 1979. Infestation levels ranged from 0 to 47.8 new attacks per acre. The potential for ...

  Citation × Citation Citation Abstract Copy Title: Establishment report : permanent mountain pine beetle population trend plots, Montana, 1979 Author: Bennett, D. D., Gibson, K. E. (Kenneth E.), United States. Forest Service. Northern Region. State & Private Forestry, McGregor, Mark D. Thirty permanent mountain pine beetle population trend plots were established in each of six areas in the state in 1979. Infestation levels ranged from 0 to 47.8 new attacks per acre. The potential for increased mortality is considered high for all areas. Each area will be evaluated for 5 years to determine the course of the infestation and resultant impact to the stands. Title: Establishment report : permanent mountain pine beetle population trend plots, Montana, 1979 Author: Bennett, D. D., Gibson, K. E. (Kenneth E.), United States. Forest Service. Northern Region. State & Private Forestry, McGregor, Mark D. Thirty permanent mountain pine beetle population trend plots were established in each of six areas in the state in 1979. Infestation levels ranged from 0 to 47.8 new attacks per acre. The potential for increased mortality is considered high for all areas. Each area will be evaluated for 5 years to determine the course of the infestation and resultant impact to the stands. Close