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Filtering by: Subject Douglas fir -- Diseases and pests -- Flathead River Valley (B.C. and Mont)

Status of western false hemlock looper infestation in the upper Flathead Valley, Montana

Creator:

Meyer, Hubert E., Kohler, Steve, and United States. Forest Service. Northern Region. State & Private Forestry

Resource Type:

Technical Report

Full Text:

December 1975 STATUS OF WESTERN FALSE HEMLOCK LOOPER INFESTATION IN THE UPPER FLATHEAD VALLEY, MONTANA by
Impact of egg viability, egg parasitism, and virus on 1975 Douglas-fir tussock moth defoliation potential in the lower Flathead Valley, Montana

Creator:

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

Abstract:

Evaluation of Douglas-fir tussock moth, Orgyia pseudotsugata, egg masses collected from an outbreak area in the lower Flathead Valley indicated that overall egg viability was relatively high, egg parasitism was low, and virus infestation averaged 7.1 percent northwest of Polson, 17.9 percent south of St. Ignatius, and 57.0 percent west...

Resource Type:

Technical Report

Full Text:

• sable 1.--Data from Douglas-fir tussock moth egg masses collected from lower Flathead Valley and