Last edited by Bralar
Wednesday, May 6, 2020 | History

3 edition of Observations on the impact of western spruce budworm on the Valley Creek Drainage, Flathead Indian Reservation, Montana found in the catalog.

Observations on the impact of western spruce budworm on the Valley Creek Drainage, Flathead Indian Reservation, Montana

Wayne E. Bousfield

Observations on the impact of western spruce budworm on the Valley Creek Drainage, Flathead Indian Reservation, Montana

by Wayne E. Bousfield

  • 18 Want to read
  • 14 Currently reading

Published by USDA, Forest Service, Northern Region, Division of State and Private Forestry in Missoula, Mont .
Written in English

    Subjects:
  • Western spruce budworm -- Montana -- Flathead Indian Reservation.

  • About the Edition

    The western spruce budworm, Choristoneura occidentalis (Free.), has caused a measurable impact on a portion of the Flathead Indian Reservation during a 5-year infestation period. This survey showed that most of the grand fir and alpine fir, and 13.8 percent of the Douglas fir has been top killed in the Valley Creek area west of Arlee, Montana. The survey also disclosed that a total net growth loss of 19.6 1.9 board feet per acre per year has occurred since 1967. Significant growth reduction at the 99 percent level occurred in Douglas-fir, grand fir, alpine fir, and western larch. Little mortality in trees 5 inches d.b.h. and greater has occurred to date. Of the trees under 5 inches d.b.h. 55.6 percent were not suitable for Christmas tree production because of insect damage.

    Edition Notes

    Statementby Wayne Bousfield ... [et al.].
    SeriesInsect and disease report, Report -- no. 73-17., Report (United States. Forest Service. Northern Region) -- no. 73-17.
    ContributionsUnited States. Forest Service. Northern Region. State & Private Forestry.
    The Physical Object
    Pagination8 leaves :
    ID Numbers
    Open LibraryOL16139233M


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Observations on the impact of western spruce budworm on the Valley Creek Drainage, Flathead Indian Reservation, Montana by Wayne E. Bousfield Download PDF EPUB FB2