Abstract

Abstract A description is provided for Ganoderma applanatum . Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: A very wide range of broad-leaved and coniferous trees. As much confusion has arisen between G. applanatum and G. adspersum earlier references must be accepted only with care as to the hosts. It is the authors observation that G. applanatum is more frequent in the woodland biotype than in orchards, garden and roadside plantations while G. adspersum seems to be more frequent in the latter. GEOGRAPHICAL DISTRIBUTION: Throughout the northern hemisphere temperate zone. The northern limit follows the tree line. The southern limit is Florida in the USA, the Mediterranean sea in Europe, Northern Iran, Northern Pakistan, southern slopes of the Himalayas, but a specimen has been obtained from Bombay in India. In Pakistan and India it overlaps slightly with the range of G. tornatum (CMI Descript. 447). TRANSMISSION: Transmission is probably confined to air-borne spores and root contact with infected plant material in the soil.

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