Abstract
A description is provided for Fulvia fulva. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Lycopersicon esculentum. DISEASE. Leaf mould of tomato is a major disease of this crop. The first symptoms are pale chlorotic spots (margins indefinite) on the upper leaf surface. Sporulation, on the lower surface beneath the spots, is downy, light grey, becoming buff to tawny brown or olive green. Defoliation may occur. Infection of blossoms and fruits is much less important. There was an interval of c. 6 weeks between the incidence of severe leaf colonization (50% leaf area) and decreases in yield (48, 1982). GEOGRAPHICAL DISTRIBUTION: Worldwide (CMI Map 77, ed. 5, 1972). TRANSMISSION: By air-dispersed conidia; these were considered to be viable for 9-12 months under adverse conditions (18, 142). Seed contamination may occur.