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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

Creator:: Flavell, Thomas H., Tunnock, Scott, Meyer, Hubert E., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: A pilot project to evaluate trichlorfon and acephate for suppressing western spruce budworm populations was conducted on the Helena National Forest, Montana. Both insecticides were applied at 1 pound active ingredient per acre. Application was made with a Bell 205A helicopter using eight Beecomist Model 350 spray heads. Treatments and...
Resource Type:: Technical Report

Creator:: Tunnock, Scott, Flavell, Thomas H., Meyer, Hubert E., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Aerial surveys of six Montana National Forests in 1975 found a 22.1% increase in the area of visible defoliation caused by the western spruce budworm. It is estimated that 2,278,804 acres of Douglas-fir forests are now suffering at least 25% defoliation. This is an increase of 503,706 acres over the...
Resource Type:: Technical Report

ScholarsArchive@OSU