Micro-organismes dans les tissus colorés et cariés du peuplier faux-tremble

Abstract

Trees in two 45-year old stands of aspen were sampled for microorganisms in discolored and decayed wood. The main genera of fungi imperfecti isolated were Phialophora, Libertella and Ascocoryne. The commonest decay organism was Corticiumpolygonium followed in decreasing order of frequency by Fomesigniarius, Phlebiastrigoso-zonata and Pleurotusostreatus. Trichocladiumcanadense was usually found in the wood near the stump as was Armillariamellea. Bacteria and yeasts were common, especially in colored wood. From the location of the main organisms recorded, a succession of organisms is apparent. The presence of F. igniarius apparently is influenced by aspen clonal characteristics.

Erwinia spp. and a new canker disease of hybrid poplars in Ontario

“…There have been no reports of bacterially-induced diseases of poplars growing in North America. Bacterial organisms which have been isolated from disease symptoms of poplars have generally not been adequately identified (ETHERIDGE 1961;LAFLAMME and LORTIE 1973). KNUTSON (1972) reported isolating strains of Erwinia spp.…”