Abstract
SUMMARYThe anthracnoses of coffee known in East Africa as ‘brown blight’ are denned with respect to coffee berry disease, both caused by strains of Colletotrichum coffeanum Noack(Ghmerella cingulata (Stonem.) Spauld. & von Schrenk). Pathogenicity of brown blight strains to twigs, leaves, blossoms and berries is investigated and discussed with the conclusion that consistent differences in pathogenicity are absent. Latent infections on green berries were observed to become active upon ripening. The general role of C. coffeanum (other than CBD strains) appears to be confined to colonization of necrotic and moribund tissue, with sporadic active parasitism under certain local conditions.Maximum apparent losses are blemishing of 4% of parchment coffee and possible total loss of 2 %, both avoidable by regular picking. Other possible losses are discussed.
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