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Creator:: Gibson, Kenneth E. and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: 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...
Resource Type:: Technical Report
Full Text:: readily apparent. Though the lodgepole component of the United States Forest Northern State

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:: 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:: throughout most of the State in 1979. This increase in infestation should result in an intensification of

Creator:: Gibson, Kenneth E., McGregor, Mark D., Bennett, D. D., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: The mountain pine beetle infestation on Bureau of Land Management lands in Centennial Valley has increased from about 500 acres in 1977 to more than 7,000 in 1979. Average number of trees per acre killed has more than quadrupled, increasing from 9.8 in 1977 to 47.8 in 1979. Predictions for...
Resource Type:: Technical Report
Full Text:: to management personnel in the State, Federal, or private agencies concerned. These infestations are

Creator:: Hagle, Susan K., Kissinger, Willard A., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Needlecast fungi were found on 95 percent of damage collections in a June survey of Scots pine (Pinus sylvestris) Christmas tree plantations in the Kalispell Basin western Montana. Western gall rust (Endocronartium harknessii) and pine bark aphids (Pineus sp.) were present on 6.6 and 2.5 percent of collections, respectively. Cylcaneusma...
Resource Type:: Technical Report
Full Text:: considered by the State Department of Agriculture to halt further import of the disease into Montana on

Creator:: Tunnock, Scott and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: Land Management 11 Rocky Boy's Indian Reservation 11 Stillwater State Forest 11 Swan

Creator:: McGregor, Mark D. and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: occurred on the Tally Lake RD, Still- water State Forest, and in the Ten Lakes Basin, Kootenai NF. A com

Creator:: Byler, James W., James, Robert L., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Two methods attempting to stop marginal spread of a root disease center in Douglas-fir were evaluated within the Flathead Indian Reservation, Montana. The first method was to cut all living trees within a 1-chain strip outside the edge of the infestation. The second method was to uproot all trees for...
Resource Type:: Technical Report
Full Text:: . . • United States Forest Northern State & • Department of Service Region Private Agriculture Forestry

Creator:: James, Robert L., Stewart, C. A., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: An impact survey to determine extent and distribution of root disease centers was completed for the Nezperce National Forest, Idaho, in 1980. Lowlevel color infrared photography was used to delineate root disease centers within National Forest inventory subcompartments. Suspected root disease centers were ground checked to determine associated fungi and...
Resource Type:: Technical Report
Full Text:: and Disease Information System (FIDIS) and to contribute to forest management planning. This report

Creator:: Dooling, Oscar J. and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Residual Douglas-fir are dwarf mistletoe-infested and pose a threat to regeneration. Felling of these residuals will reduce dwarf mistletoe intensity and increase future volume yields. The benefit/cost ratio at 4 percent for the current rotation is 0.51/1 on the Sula RD and 0.45/1 on the Darby RD (both negative ratios)....
Resource Type:: Technical Report
Full Text:: 5pi4/# PRONG B/NDER /49 Forest Pest/41 Management Report No. 81-5

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