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Creator:: McGregor, Mark D. and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: 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...
Resource Type:: Technical Report
Full Text:: , MONTANA • • The mountain pine beetle infestation in the Ninemile drainage began in 1969. Although

Creator:: McGregor, Mark D. and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Mountain pine beetle infestations have continued at epidemic level in lodgepole pine stands since 1969 in the West Gallatin River drainage. This infestation has increased at about a 1.9:1 buildup ratio annually. Since the outbreak began in 1969, surveys indicate that approximately 22,354 merchantable size trees have been killed with...
Resource Type:: Technical Report
Full Text:: OF STATE & PRIVATE FORESTRY MISSOULA, MONTANA • • INTRODUCTION Mountain pine beetle

Creator:: McGregor, Mark D. and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: 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...
Resource Type:: Technical Report
Full Text:: • Report No. 73-18 5200 July 1973 STATUS OF MOUNTAIN PINE BEETLE INFESTATIONS ON THE SUPERIOR RANGER

Creator:: Bousfield, Wayne E., McGregor, Mark D., Kohler, Steve, and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: 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...
Resource Type:: Technical Report
Full Text:: 1973 MOUNTAIN PINE BEETLE IMPACT SURVEY ON THE NINEMILE DISTRICT, LOLO NATIONAL FOREST, AND

Creator:: McGregor, Mark D. and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: • STATUS OF MOUNTAIN PINE BEETLE INFESTATIONS NORTHERN REGION

Creator:: McGregor, Mark D., Oakes, Robert D., Meyer, Hubert E., United States. Forest Service. Northern Region. Cooperative Forestry & Pest Management, and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: • • • • • • • STATUS OF MOUNTAIN PINE BEETLE, NORTHERN

Creator:: McGregor, Mark D., Lood, Rudolph C., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Mountain pine beetle infestations have increased in second-growth ponderosa pine stands in the Garnet Mountains since 1971. The extremely dry 1973 season resulted in an increase of Ips engraver beetle activity that was responsible for over half of the tree mortality in 1973. Commercial thinning is recommended to alleviate the...
Resource Type:: Technical Report
Full Text:: M. D. McGregor, 1970. Impact of the mountain pine beetle on the Lolo National Forest, Montana. USDA

Creator:: Gibson, Kenneth E. and United States. Forest Service. Northern Region
Abstract:: This report includes information obtained in both 1983 and 1984. Beginning in 1983, only four of the original six permanent plot locations in the State would be revisited. The two in the southwestern part of the State--Centennial Valley and Madison River--were not visited because of reduced beetle populations and 111.1...
Resource Type:: Technical Report
Full Text:: : Permanent mountain pine beetle trend plots, Montana, 1979. USDA For. Serv. North. Reg., S&PF CFPM, Rept. 80

Creator:: Gibson, Kenneth E. and United States. Forest Service. Northern Region. Cooperative Forestry & Pest Management
Abstract:: For the fourth year since their establishment, the six permanent plot locations in Montana were revisited following beetle flight in 1982.Beetle populations remained low in five of the six areas. Only in the Murr Creek plots did newly attacked trees represent an epidemic beetle population. In the Centennial Valley location,...
Resource Type:: Technical Report
Full Text:: mountain pine beetle trend plots, Montana, 1979. USDA For. Serv., Northern Region, S&PF, FPM Rpt. 80-8, 14

Creator:: Gibson, Kenneth E. and United States. Forest Service. Northern Region
Abstract:: The series of mountain pine beetle infestations existing on the Plains/Thompson Falls Ranger District, Lob National Forest, since 1971 continued into 1988. While some infestations are waning, others are increasing. The potential for beetle-caused mortality exists in threatened, but as yet uninfested stands. Management alternatives are discussed.
Resource Type:: Technical Report
Full Text:: . Establishment report: permanent mountain pine beetle populations trend plots, Montana, 1979. USDA For. Serv

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