Cercospora pini-densiflorae. [Descriptions of Fungi and Bacteria].
Abstract A description is provided for Cercospora pini-densiflorae[Mycosphaerella gibsonii]. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On pines, including Pinus radiata, P. pinaster, P. canariensis, P. massoniana, P. densiflorae, P. thunbergii, P. luchuensis, P. strobus, P. caribaea. DISEASE: Cercospora pine blight. Causes yellowish-brown to grey lesions, appearing generally towards the distal part of the needles. These coalesce to give complete needle necrosis and cast in the course of time. Dark brown stromata, bearing dense conidiophores, are formed in stomatal cavities, from which conidia are dispersed. This is a disease of the later nursery stages and first few years in plantation. GEOGRAPHICAL DISTRIBUTION: Africa (Rhodesia, Tanzania (45, 2615), Zambia); Asia (Hong Kong, India, Japan, Korea, Taiwan, West Malaysia). TRANSMISSION: Air-borne conidia dispersed by splash take-off mechanism.