Abstract
Abstract A description is provided for Phellinus pomaceus . Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Largely confined to trees belonging to the Rosaceae , chiefly on Prunus and rarely on Malus, Pyrus, Syringa . DISEASE: Heart rot of plum. Of a general delignifying type, with the wood becoming white and crumbling, bounded by a dark purplish-brown zone of incipient decay. GEOGRAPHICAL DISTRIBUTION: Asia (China, Japan, U.S.S.R.); Europe (Bulgaria, Cyprus, Czechoslovakia, Germany, Great Britain, Greece, Hungary, Malta, Netherlands, Spain); North America (Canada, U.S.A.), Central America (Mexico). TRANSMISSION: By air-borne spores which may be discharged during the winter months from November onwards (22: 2). Spores may remain viable for 24 weeks and mycelium in wood blocks up to 31 yr. (Fisher, 1935).
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