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

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dc.creator Tunnock, Scott
dc.creator McGregor, Mark D.
dc.creator Lood, Rudolph C.
dc.creator United States. Forest Service. Northern Region. State & Private Forestry
dc.date.accessioned 2006-11-13T14:47:47Z
dc.date.available 2006-11-13T14:47:47Z
dc.date.issued 1976
dc.identifier.uri http://hdl.handle.net/1957/3362
dc.description 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 reduction in population. Approximately 36.7 percent of the population collected and reared in the laboratory died from unknown causes; 11 percent were parasitized; and 3.4 percent were killed by nucleopolyhedrosis virus. Phobocampe n.s. was the most abundant parasite and attacked all instars. Unlike most other past outbreaks, this one did not collapse at the end of 3 years due to virus and parasites. Egg masses were found in infested areas during the fall of 1974. en
dc.format.extent 6617614 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Missoula, MT. : Forest Environmental Protection, USDA, Forest Service, Northern Region, State & Private Forestry en
dc.relation.ispartofseries Report (United States. Forest Service. Northern Region) en
dc.relation.ispartofseries no. 76-8 en
dc.relation.ispartofseries Forest environmental protection en
dc.subject.lcsh Douglas-fir tussock moth -- Idaho en
dc.subject.lcsh Conifers -- Diseases and pests -- Idaho en
dc.title Natural mortality in a Douglas-fir tussock moth infestation in Idaho, 1974 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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