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Filtering by: Subject Conifers -- Diseases and pests -- Idaho -- Nezperce National Forest -- Forecasting

Forecasting western spruce budworm defoliation in mixed conifer stands by counting hibernating larvae

Creator:

Tunnock, Scott and United States. Forest Service. Northern Region. State & Private Forestry

Abstract:

An attempt was made in January 1971 to relate the numbers of hibernating western spruce budworm larvae on a square foot of bark surface with subsequent shoot damage on Douglas-fir and grand fir in northern Idaho. Twenty-six plots sampled in January were also sampled in April to determine if larval...

Resource Type:

Technical Report