Ramularia alba. [Descriptions of Fungi and Bacteria].
Abstract A description is provided for Ramularia alba. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Lathyrus odoratus, the sweet pea. DISEASE: White blight of sweet pea, also called white mould or Cladosporium blight. Leaf spots vary from yellow flecks to buff coloured dead areas, which may be circular or irregular in shape merging gradually into healthy leaf tissue. Leaf spots may merge together affecting most of the leaf and in such cases defoliation may result (30, 41). GEOGRAPHICAL DISTRIBUTION: Europe (Denmark, England, Sweden). North America (Canada: British Columbia, Ontario; USA: California, Massachusetts, New Jersey, New York, Pennsylvania, Texas). TRANSMISSION: By wind dispersal of air-borne conidia.