Cronartium flaccidum. [Descriptions of Fungi and Bacteria].
Abstract A description is provided for Cronartium flaccidum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Pinus spp. including P. sylvestris, P. pinaster, P. pinea, P. halepensis, P. wallichiana and most hard pines. Alternate hosts include species of Asclepias, Impatiens, Loasa, Melampyrum, Nemesia, Paeonia, Pedicularis, Ruellia, Schizanthus, Tropaeolum, Verbena, Vincetoxicum; Vincetoxicum officinale is an important alternate host in Europe. DISEASE: Scotch pine blister rust, resin canker. GEOGRAPHICAL DISTRIBUTION: Throughout Europe and Asia to the Far East, wherever susceptible hosts occur. TRANSMISSION: Pycniospores by insects attracted by sugary exudate; other spores are directly air-borne.