Bondi Junction NSW, Australia
Fact Sheets
Cassava grey leaf spot (321)
Pacific Pests, Pathogens and Weeds
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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