Abstract
The seasonal incidence, development and disease symptoms caused by Cercospora cojfeicola on leaves and berries of coffee (Coffea arabica) have been investigated. Disease spread is by wind-borne spores, which are relatively short lived. The fungus overwinters mainly as mycelium in lesions. Spores germinate over a wide range of temperature. Optimum temperature for growth in culture is 25 °C. The fungus penetrates the leaves through stomata, and the berries through wounds or sunscorch injury. The alternative host, Ricinus communis, is not important in maintaining the disease in Malawi.
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