Abstract
Abstract A description is provided for Inonotus hispidus . Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Principally associated with Fraxinus and Malus , but also recorded on Acer, Aesculus, Alnus, Betula, Carya , Crataegus, Euonymus, Fagus, Ficus, Juglans, Liquidambar, Morus, Pistacia, Pyrus, Platanus, Populus, Prunus, Quercus, Robinia, Salix, Schinus, Sophora, Ulmus, Vitis and Zizyphus . DISEASE: Heart rot of ash. The rot is of the general delignifying type, the wood becoming soft and spongy throughout, the decayed wood turning straw to pale yellow brown. In addition to attacking heart wood the pathogen may penetrate living tissues (Nutman, 1929). Young trees may be severely damaged by cankers which distort the stems. GEOGRAPHICAL DISTRIBUTION: Africa (Morocco), Asia (China, Japan, India, Syria, U.S.S.R., West Pakistan), Europe (Belgium, Cyprus, Czechoslovakia, Finland, France, Germany, Great Britain, Greece, Hungary, Italy, Netherlands, Norway, Portugal, Spain, Sweden); North America (Canada, U.S.A.); South America (? Brazil). TRANSMISSION: By air-borne spores. Stubs of dead branches, frost cracks and wounds, particularly those found in old hedgerow trees, all serve as infection courts.
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