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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:: Hamel, Dennis R., McGregor, Mark D., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Emerged beetles were first collected July 17 and peak emergence occurred between August 10 and 26, 1975. Density of attacks averaged four per 0.5 ft. 2 (0.05 m2). Parent to brood ratio was 1:4.6. Thirteen associate insects, representing six families of Coleoptera and one of Diptera, were recovered. Associates included...
Resource Type:: Technical Report
Full Text:: .--Associates of mountain pine beetle collected on Gallatin District, Gallatin National Forest, Montana, 1975

Creator:: McGregor, Mark D., Hamel, Dennis R., Lood, Rudolph C., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Mountain pine beetle has occurred at epidemic level in lodgepole pine stands in the west Gallatin River drainage since 1969. Infestation now encompasses about 5,500 acres. Since 1969, approximately 463,212 trees, with an estimated volume of 20,529,244 board feet have been killed. Approximately 69 percent of the stands on the...
Resource Type:: Technical Report
Full Text:: FOREST MONTANA, 1975 By M.D. McGregor, D.R. Hamel, and R.C. Lood ABSTRACT Mountain pine beetle has

Creator:: McGregor, Mark D., Kohler, Steve, Ferry, Gardner, and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: 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...
Resource Type:: Technical Report
Full Text:: 1974 EVALUATION OF MOUNTAIN PINE BEETLE INFESTATIONS WOLF MOUNTAINS, CROW INDIAN RESERVATION, MONTANA

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