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Creator:: McGregor, Mark D., Hamel, Dennis R., Kohler, Scott, and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Mountain pine beetle populations developed to epidemic level in Glacier National Park in 1972. Buildup ratio of old to newly attacked trees was 1:1.8 from 1976 to 1977. More than 12 million trees are infested on 142,871 acres. Buildup ratio is expected to exceed 1:3 from 1977 to 1978. Management...
Resource Type:: Technical Report

Creator:: McGregor, Mark D., Hamel, Dennis R., Meyer, Hubert E., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Mountain pine beetle populations developed to epidemic level on the Bozeman-Gallatin Ranger District in 1969. Approximately 146,000 acres are currently infested. Since 1969, over 350 MMBF have been killed. It is predicted that over 4 million trees could be killed in 1978. Infestation is predicted to intensify in high-hazard stands....
Resource Type:: Technical Report

Creator:: McGregor, Mark D., Hamel, Dennis R., Oakes, Robert D., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Mountain pine beetle developed to epidemic level in lodgepole pine stands in 1969 on the Gallatin District and in 1970 on the Hebgen Lake District. Epidemic infestation occurs on 53,437 hectares. Infestations will intensify in most areas currently infested and develop in uninfested stands, and in excess of 2 million...
Resource Type:: Technical Report

Creator:: Hamel, Dennis R., McGregor, Mark D., Oakes, Robert D., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Mountain pine beetle populations developed to epidemic level in lodgepole pine stands in 1973. Approximately 426,355 trees were killed on 3,433 hectares in 1976. Infestations are expected to intensify in areas of current infestation and develop in uninfested stands. It is predicted that 1,722,288 trees will be killed in 1977....
Resource Type:: Technical Report

Creator:: Hamel, Dennis R., McGregor, Mark D., Oakes, Robert D., and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report

Creator:: McGregor, Mark D., Hamel, Dennis R., and Oakes, Robert D.
Abstract:: Mountain pine beetle developed to epidemic levels in lodgepole pine stands in the Thompson River drainage in 1971. Approximately 506,616 trees are infested on 4,444 hectares. Based on buildup ratios, infestations are expected to intensify; develop in uninfected stands; and kill about 1,763,024 trees in 1977. Salvage logging of infested...
Resource Type:: Technical Report

Creator:: Hamel, Dennis R., McGregor, Mark D., Oakes, Robert D., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Mountain pine beetle populations began increasing in Glacier National Park in 1970. Numbers of infested trees increased steadily from an average of 12 to 115 per hectare from 1972 to 1976. Total hectares of infestation have increased from 445 in 1972 to 40,419 ha in 1976. Predictive equations estimate a...
Resource Type:: Technical Report

Creator:: McGregor, Mark D., Hamel, Dennis R., Oakes, Robert D., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Windthrow occurred during late April on the Glacier View, Hungry Horse, Spotted Bear, and Swan Lake Ranger Districts, Flathead National Forest. An evaluation to determine potential for development of spruce beetle and Douglas-fir beetle outbreaks was made during late June and early July. All areas examined were classed as having...
Resource Type:: Technical Report

Creator:: McGregor, Mark D., Hamel, Dennis R., Lood, Rudolph C., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Dipel (R) was applied by helicopter to three blocks of Douglas fir and Engelmann spruce infested with Choristoneura occidentalis Free., in southwestern Montana. Dosage was 1 pound (7.2 Bill) in 2 gallons of water/acre (453 g in 7.5 t/0.4 ha). A commercial surfactant, Bio-film (R) was added at the rate...
Resource Type:: Technical Report

Creator:: Hamel, Dennis R., McGregor, Mark D., and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report

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