Mixed infection of the gypsy moth, Lymantria dispar japonica Motschulsky (Lepidoptera: Lymantriidae), in a larch forest by Entomophthora aulicae (Reich.) Sorok. and Paecilomyces canadensis (Vuill.) Brown et Smith

Field observations of an epizootic in gypsy moth (Lymantria dispar japonica MOTSCHULSKY) population by two pathogenic fungi during the summer of 1972 in a larch forest in Tohoku District of Japan indicated that fungus-killed larvae occurred in about 99% of the population. Mixed infection of Paecilomyces canadensis (VUILL.) BROWN et SMITH and Entomophthora aulicae (REICH.) SOROK. occurred in about 20% of the dead larvae, which showed typical muscardine. Only E. aulicae was found in the remaining fungus-killed larvae. Most of the dead larvae were found near the base of the tree trunks.