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Creator:: Meyer, Hubert E. and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: The variable oak leaf caterpillar, Heterocampa manteo (Dbldy.), has defoliated hardwoods in two North Dakota locations for 3 years (Fig. 1). This is the second consecutive year its damage has been monitored. Monitoring has been done cooperatively with William Brandvik, Associate State Entomologist, North Dakota Department of Agriculture.
Resource Type:: Technical Report
Full Text:: with William Brandvik, Associate State Entomologist, North Dakota Department of Agriculture. Figure 1

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:: Byler, James W., Stewart, C. A., Hall, L. D., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Methods used to establish permanent plots in precommercially thinned and unthinned stands to monitor root disease development are described. Plots were established in 22 Armillaria-infested stands in northern Idaho and western Montana. The proportion of trees dead and infected was significantly higher for planted than for natural regeneration at the...
Resource Type:: Technical Report
Full Text:: authors in Canada and the western United States indicate the cause may be Armillaria ostoyae. Cur

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., Byler, James W., and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: in recreation sites. USDA-Forest Serv., State and Private For., Rocky Mtn. Region. Tech. Rept. R2-1

Creator:: Dooling, Oscar J. and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: more detailed report will be published later this year. IC • United States Forest Northern State

Creator:: Hagle, Susan K., Schwandt, John W., Johnson, Terri L., Kegley, Sandra J., Bell Randall, Carol S., Taylor, Jane E., Lockman, I. Blakey, Sturdevant, Nancy J., Marsden, Michael A., United States. Forest Health Protection, and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report

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