Fungal and Bacterial Pathogens of the Larch Sawfly

Abstract
Fungi and bacteria each play a role in the natural control of many sawflies, including P. erichsonii. Parasitic fungi, for example, have been isolated from species in the following genera: Anoplonyx, Arge, Monoctenus, Neodiprion, Trichiosoma, Hemichroa, Pikonema, and Pristiphora. The isolates include species from Cephalosporium, Sorosporella, Isaria, Beauveria, Spicaria, Hirsutella, and Empusa (MacLeod, unpub.). The last five fungus genera have been isolated from larch sawfly collections made in various parts of Canada and the United States.