Bondi Junction NSW, Australia
Fact Sheets
2021-09-08T03:10:00.2917628Z
   2
Arrowroot leaf spot (222)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds

Summary

  • Narrow distribution. Philippines and Oceania. Fungal disease; possibly serious, but little researched.
  • Spots, round to irregular, grey-brown, with yellow halo on mature leaves. A wet weather disease; spores spread by wind and rain from underside of leaves.
  • Cultural control: difficult as plants harvested at different times and replanted in same place. Remove infected leaves and burn them to delay onset of disease during wet times; practice crop rotation, and plant 'gardens' at one time.
  • Chemical control: not appropriate – uneconomic, and potential to contaminate fresh water lens.

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