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Creator:: Gibson, Kenneth E., Bennett, D. D., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: During December 1978 and January 1979, temperatures reached all-time lows in some parts of Montana. Overwintering mountain pine beetle populations were sampled at 11 sites during February and March 1979. Effects of the extreme cold varied from site to site, with larval mortality ranging from 6 percent to 100 percent....
Resource Type:: Technical Report
Full Text:: USDA • FOREST SERVICE • NORTN State & Private Forestry • Missou' M porn: it 3450 .Report No. 79-15

Creator:: Dewey, Jerald E., Jenkins, Michael J., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Insect damage was extensive to Douglas-fir, ponderosa pine, western white pine, and western larch cones at most seed production areas surveyed in 1979. From 70 to 100 percent of the cones from several collecting periods were injured. Moderate damage (40-70 percent of cones injured) occurred to Douglas-fir, ponderosa pine, western...
Resource Type:: Technical Report
Full Text:: in Region 1. (Progress Report). USDA-Forest Service, Forest Insect and Disease Management, Report No

Creator:: Bousfield, Wayne E. and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: The purpose of insect and disease damage surveys is to estimate losses caused by various pests, so that the land manager can prescribe appropriate management action. Systematic ground data collection systems provide to the land manager loss data that can be used for cost benefit analysis, management plans, environmental impact...
Resource Type:: Technical Report
Full Text:: FOREST INSECT & DISEASE MANAGEMENT USDA • FOREST SERVICE • NORTHERN

Creator:: Bousfield, Wayne E. and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: /v0 A 3 FOREST ;_jNSECT & DISEASE MANAGEMENT USDA • FOREST SERVICE

Creator:: Flavell, Thomas H., Tunnock, Scott, Drake, L. E., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Aerial and ground surveys to detect and evaluate forest insect and disease conditions in North Dakota were made during June 1977 by personnel from the U.S. Forest Service, Forest Insect and Disease Management staff and the Rocky Mountain Forest and Range Experiment Station. A forest tent caterpillar outbreak in the...
Resource Type:: Technical Report
Full Text:: . Forest Service, Region 1, State and Private Forestry, Forest insect and Disease Management,. accompanied

Creator:: Gibson, Kenneth E., Bennett, D. D., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Mountain pine beetle populations increased in 1979 in the Thompson River drainage to levels predicted following the 1978 attack period. New attacks in 1979 averaged 27 per acre. Current estimates indicate another 25 percent of the remaining lodgepole pine could be killed in 1980.
Resource Type:: Technical Report
Full Text:: and disease damage survey system. USDA-Forest Service, Northern Region, Forest Insect & Disease Mgt

Creator:: Gibson, Kenneth E., United States. Forest Service. Northern Region. Forest Insect and Disease Management, and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: This report contains an overview of the present mountain pine beetle infestation in lodgepole pine stands on Federal, State, and private lands on the Plains Ranger District. Particular emphasis is placed on the potential for beetle mortality in the Thompson River drainage where recent ground surveys show more than 21...
Resource Type:: Technical Report
Full Text:: USDA • FOREST SERVICE • NORTHERN REGION State & Private Forestry • Missoula, MT 59801 3450 Report No

Creator:: McGregor, Mark D., Bennett, D. D., Meyer, Hubert E., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Mountain pine beetle populations developed to epidemic level in 1970 on the Hebgen Lake Ranger District. Infested acreage increased from 78,000 in 1977 to 79,061 in 1978. More than 4 million trees (238 MMBF) were killed in 1978. Cold temperatures during December 1978 may cause a significant decline in the...
Resource Type:: Technical Report
Full Text:: SERVICE • NORTHERN REGION State & Private Forestry • Missoula, MT 59801 3450 Report No. 79-6 February

Creator:: Gibson, Kenneth E., McGregor, Mark D., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: This report contains a brief history of selected mountain pine beetle infestations and the potential for infestations in high hazard stands on the Tally Lake Ranger District. Management alternatives to lessen the severity, or reduce the possibility, of infestations are discussed.
Resource Type:: Technical Report
Full Text:: FOREST 8iNbER *INSECT S. DISEASE MANAGEMENT USDA • FOREST SERVICE

Creator:: Dooling, Oscar J. and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Residual lodgepole pine in older clearcuts are dwarf mistletoe-infected and pose a threat to regeneration present. Removal of these residuals coupled with planned or completed precommercial thinnings will effectively reduce dwarf mistletoe to an insignificant level and increase future volume yields. The benefit/ cost ratios based on timber values alone...
Resource Type:: Technical Report
Full Text:: SERVICE • NORTHERN REGION State & Private Forestry • Missoula, MT 59801 Report No. 78-16 5200 July

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