Cassava grey leaf spot (321)
Pacific Pests, Pathogens and Weeds
- Worldwide. A minor fungal disease of cassava (more important on rubber).
- Similar to Passalora henningsii (see Fact Sheet no. 95), but affected areas usually larger, more angular, and more often cause death of leaves.
- Leaf spots are circular, up to 10 mm diameter, with pale centres and wide brown or purplish borders.
- Cultural control: none.
- Chemical control: none. (Chlorothalonil and mancozeb have been recommended against the fungus on rubber.)
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