Colletotrichum acutatum

Post bloom fruit drop

Photo by Robert L. Anderson, USDA Forest Service,

  • Widespread throughout humid, subtropical citrus areas of the Americas
  • Serious crop losses in high rainfall areas
  • Infects flower petals and produces watersoaked lesions that turn pink, then orange brown as the fungus sporulates
  • The fruitlet drops, leaving the floral disk, calyx and peduncle to form ‘buttons’
  • Leaves surrounding an infected inflorescence are small, chlorotic and twisted, with enlarged veins
  • Spores are spread by wind blown rain, insects, and workers or via infected plant material (can be symptomless)


Scientific name: Colletotrichum acutatum SGO strain
EPPRD Category:
Life Form: Fungus