Inoculation studies of lodgepole pine with Alberta isolates of the Armillariamellea complex

Abstract
Two-year-old lodgepole pine (Pinuscontorta Dougl. var. latifolia Engelm.) seedlings were each inoculated with one of 12 isolates of the Armillariamellea complex. All isolates were pathogenic but differed in the amounts of infection and mortality that they caused. An isolate of A. mellea s.str. and four Alberta isolates of North American biological species V (NABS V) caused the most mortality; however. A. mellea s.str. killed seedlings more quickly than NABS V. Seven Alberta isolates of NABS I infected and killed relatively few seedlings compared with NABS V and A. mellea s.str.