Canadian Forest Service Publications
Adaptation of the microsporidian Thelohania pristiphorae to the tent caterpillars Malacosoma disstria and Malacosoma americanum. 1968. Smirnoff, W.A. Journal of Invertebrate Pathology 11(2): 321-325.
Issued by: Laurentian Forestry Centre
Catalog ID: 16020
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Thelohania pristiphorae, a microsporidian pathogen of the larch sawfly, Pristiphora crichsonii, has been successfully adapted to the tent caterpillars Malacosoma disstria and Malacosoma americanum. The development of the pathogen in M. americanum was accompanied by the development of a nuclear polyhedrosis. The microsporidian remained virulent for the original host after six passages on both Malacosoma species. A method to obtain large quantities of spores for use against either the host of origin or the two new hosts is described.