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Creator:: Tunnock, Scott and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Epidemic populations of the western spruce budworm persist in the Northern Region. Aerial surveys made in August 1976 showed a decline in the acreage of aerially visible defoliation. In northern Idaho, the defoliated area dropped from 831,487 acres in 1975 to 655,711 acres in 1976, down 21 percent. Surveys in...
Resource Type:: Technical Report
Full Text:: DEFOLIATION BY WESTERN SPRUCE BUDWORM IN NORTHERN IDAHO AND MONTANA -- 1977„0- qe. 4F i 977 z (1[1j

Creator:: Tunnock, Scott and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: An attempt was made to predict western spruce budworm defoliation using egg counts from plots in the Douglas-fir type east of the Continental Divide in Montana, the Douglas-fir type west of the Continental Divide in Montana, and the mixed grand fir Douglas-fir type of northern Idaho. The parameters used in...
Resource Type:: Technical Report
Full Text:: defoliation in 1973 on all plots in Montana and Idaho. Eggs 4 per 100 buds ranged from 1.1 to 228.9 and

Creator:: Kessler, Bruce L., Heller, Robert C., and Hard, John S.
Abstract:: A practical demonstration of a method for rating forest stands as to their probability of defoliation by the Douglas-fir tussock moth using aerial photographs and available cruise data was done in the Palouse Ranger District, Clearwater National Forest, Idaho. A nonlinear computer program, RISK, was used to identify significant independent...
Resource Type:: Technical Report
Full Text:: DEMONSTRATION FOR HAZARD RATING SUSCEPTIBILITY OF STANDS TO DOUGLAS-FIR TUSSOCK MOTH DEFOLIATION ON THE PALOUSE

Creator:: Tunnock, Scott, Meyer, Hubert E., and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: . Potential for defoliation by pine butterfly in the Bitterroot and Missoula Valleys, Montana in 1974. USDA

Creator:: Hard, John S., Tunnock, Scott, Eder, Robert G., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Western spruce budworm defoliated area in the Northern Region has differed significantly across three discrete geographic zones during the past decade. Aerially visible defoliation in northern Idaho increased from 1.7 million acres in 1969 to a high of 2.2 million acres in 1974, and declined to none in 1979. Defoliated...
Resource Type:: Technical Report
Full Text:: geographic zones but least so in western Montana. Defoliation trends based on questionable acreage figures

Creator:: Tunnock, Scott, Meyer, Hubert E., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: A needle miner, Coleotechnites sp., defoliated approximately 3,100 acres of ponderosa pine, Pinus ponderosa Laws. on the Flathead Indian Reservation, Montana, during 1978. Three other small areas in the Missoula Valley were infested also. Overwintering populations of larvae are low; thus, light defoliation is expected in 1979 in presently infested...
Resource Type:: Technical Report
Full Text:: POTENTIAL DEFOLIATION IN 1979 FROM ?22b.--•• PONDEROSA PINE

Creator:: Bousfield, Wayne E., Meyer, Hubert E., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Epidemic levels of the pine butterfly, Neophasia menapia (Felder and Felder) have been evident in ponderosa pine stands in the Bitter Root Valley since 1969. Evaluations of this infestation were initiated in 1970 to assess overwintering egg populations at 20 locations within the infestation (Ciesla et al. 1971). Defoliation was...
Resource Type:: Technical Report
Full Text:: March 1972 POTENTIAL FOR DEFOLIATION OF PONDEROSA PINE STANDS BY PINE BUTTERFLY ON THE BITTERROOT AND

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