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ENTOMOPHTHORA CRUSTOSA N. SP. AS A PATHOGEN OF THE FOREST TENT CATERPILLAR, MALACOSOMA DISSTRIA (LEPIDOPTERA: LASIOCAMPIDAE)

Published online by Cambridge University Press:  31 May 2012

Donald M. MacLeod  and
David Tyrrell
Donald M. MacLeod
Affiliation:
Forest Pest Management Institute, Canadian Forestry Service, Sault Ste. Marie, Ontario P6A 5M7
David Tyrrell
Affiliation:
Forest Pest Management Institute, Canadian Forestry Service, Sault Ste. Marie, Ontario P6A 5M7
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Abstract

Entomophthora crustosa n. sp. pathogenic for Malacosoma species (principally M. disstria Hbn.), is described. It is characterized in the conidial state by a hymenial coating which, at maturity, forms a crust-like covering, cinnamon brown, over the surface of infected insects, and by conidial size. In the resting spore (zygospore) state the distinguishing attributes are ornamentation of the zygospores and their mode of development. The pathogen grows readily on coagulated egg-yolk media.

The fungus is briefly compared with 10 other closely related Entomophthora species. Entomophthora crustosa seems to be of widespread occurrence in eastern North America.

Résumé

Entomophthora crustosa n. sp., Champignon pathogène pour les espèces de Malacosoma (principalement M. disstria Hbn.), est décrit. Il est caractérisé à l’état conidien par un hyménium qui, à maturité, forme une gaine en forme de croûte, de couleur brun cannelle, à la surface des insectes infectés et par la taille des conidies. A l’état de spore de durée (zygospore) ses attributs distinctifs sont l’ornement et le mode de développement des zygospores. Cet agent pathogène croît rapidement sur les milieux à base de jaune d’oeuf coagulés.

Le Champignon est brièvement comparé avec 10 autres espèces voisines d’Entomophthora. Entomophthora crustosa semble être très répandu dans l’est de l’Amérique du Nord.

Type
Articles
Information
The Canadian Entomologist , Volume 111 , Issue 10 , October 1979 , pp. 1137 - 1144
Copyright
Copyright © Entomological Society of Canada 1979

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