Canadian Forest Service Publications

Predation on pupae of the spruce budworm (Lepidoptera: Tortricidae) on the forest floor. 1985. Kelly, B.; Régnière, J. The Canadian Entomologist 117: 33-38.

Year: 1985

Available from: Laurentian Forestry Centre

Catalog ID: 14486

Language: English

CFS Availability: PDF (request by e-mail)

Available from the Journal's Web site.
DOI: 10.4039/Ent11733-1

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Predation on spruce-budworm, Choristoneura fumiferana (Clem.), pupae on the forest floor was estimated at 72.5% per day. It is unlikely that many adults of the spruce budworm emerge from the forest floor and there would be little bias introduced in the estimation of apparent fecundity by disregarding pupae on the ground. There were large seasonal fluctuations in the rate of predation attributable to various predator groups; the overall rate ranged from 66 to 91% per day. Low temperatures had no detectable effect on vertebrate predation, but reduced invertebrate predation; however, this effect is unlikely to result in much variation in survival of pupae on the forest floor.

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