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Filtering by: Creator United States. Forest Service. Northern Region. State & Private Forestry Creator Tunnock, Scott Subject Conifers -- Diseases and pests -- Idaho

Western spruce budworm defoliation trend relative to weather in the Northern Region, 1969-1979

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
Potential for defoliation by western spruce budworm in northern Idaho and Montana, 1977

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
Natural mortality in a Douglas-fir tussock moth infestation in Idaho, 1974

Creator:

Tunnock, Scott, McGregor, Mark D., Lood, Rudolph C., and United States. Forest Service. Northern Region. State & Private Forestry

Abstract:

Mortality from various causes was recorded in a Douglas-fir tussock moth, Orgyia pseudotsugata McD., outbreak southeast of Coeur d'Alene, Idaho, in 1974. Observations began June 27 when about 50 percent of the larvae were second instars and continued until pupation. Within a 35-day period, there was a 93 percent average...

Resource Type:

Technical Report

ScholarsArchive@OSU

Western spruce budworm defoliation trend relative to weather in the Northern Region, 1969-1979

Potential for defoliation by western spruce budworm in northern Idaho and Montana, 1977

Natural mortality in a Douglas-fir tussock moth infestation in Idaho, 1974

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