The Role of Fungal Pathogens in Spruce Budworm Population Dynamics: Frequency and Temporal Relationships
Goal(s)/Objective(s): Study the influence of parasites and pathogens on the population dynamics of the spruce budworm
Key Findings: Larvae tend to die late in the afternoon, and sporulation takes place by mid-morning of the following day.
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- Perry, D.F.
Canadian Forestry Service - Rénière, Jacques
Canadian Forestry Service
Two fir-spruce stands (Abies balsamea, Picea glauca and minor deciduous species) were selected near Gargantua Harbor (G) and Black Sturgeon Lake (BSL) in northern Ontario, to study the influence of parasites and pathogens on the population dynamics of the spruce budworm (SBW), Choristoneura fumiferana. Sampling in plot G was undertaken in 1982-1984, and in BSL in 1983-1984 as part of a continuing study. The SBW populationin plot G had reached high levels in the mid 1970's, whereas the BSL population attained high densities in the early 1980's, after a prolonged endemic period.
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