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

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dc.creator Bousfield, Wayne E.
dc.creator United States. Forest Service. Northern Region. State & Private Forestry
dc.date.accessioned 2006-11-01T21:01:51Z
dc.date.available 2006-11-01T21:01:51Z
dc.date.issued 1973
dc.identifier.uri http://hdl.handle.net/1957/3283
dc.description 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. en
dc.format.extent 2064881 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Missoula, Mont. : USDA, Forest Service, Northern Region, Division of State and Private Forestry en
dc.relation.ispartofseries Report (United States. Forest Service. Northern Region) en
dc.relation.ispartofseries no. 73-17 en
dc.relation.ispartofseries Insect and disease report en
dc.subject.lcsh Western spruce budworm -- Montana -- Flathead Indian Reservation en
dc.title Observations on the impact of western spruce budworm on the Valley Creek Drainage, Flathead Indian Reservation, Montana en
dc.type Technical Report en
dc.description.digitization Scanned at 600 DPI using a Cannon DR-9080C in TIF format. PDF generated through Capture Perfect using OmniPage Professional 15 for textual OCR. en


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