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EFFECTS OF PLEISTOPHORA SCHUBERGI (MICROSPORIDA) ON THE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIODPTERA: TORTRICIDAE)

Published online by Cambridge University Press:  31 May 2012

G. G. Wilson
G. G. Wilson
Affiliation:
Forest Pest Management Institute, Canadian Forestry Service, Sault Ste. Marie, Ontario P6A 5M7
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Abstract

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Spores of the microsporidium Pleistophora schubergi were fed to second- and fifth-instar larvae of the spruce budworm, Choristoneura fumiferana. A treatment of 2 × 108 spores applied to the surface of the host's diet resulted in 100% mortality to second- and 60% to fifth-instar larvae. Suceptibility of the host to the parasite decreased as the larvae became older. Other effects on host development were not significant at the dosages tested.

Résumé

On a nourri des tordeuses des bourgeons de l'épinette Choristoneura fumiferana des deuxième et cinquième stades larvaires, de spores de la microsporidie Pleistophora schubergi. Une dose de 2 × 108 spores appliquée sur la nourriture a causé une mortalité de 100% et de 60%, respectivement, chez les deuxième et cinquième stades. La susceptibilité envers le parasite diminue avec l'âge. Les autres effets sur le développement de l'hôte n'étaient pas notables aux doses utilisées.

Type
Articles
Information
The Canadian Entomologist , Volume 114 , Issue 1 , January 1982 , pp. 81 - 83
Copyright
Copyright © Entomological Society of Canada 1982

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