Bondi Junction NSW, Australia
Fact Sheets
Algal leaf spot (148)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds


  • Worldwide in sub-tropics and tropics. On many fruit trees, palms and spice crops. A minor disease in areas of high temperature and rainfall.
  • Spots green to orange, (sometimes black) 2-4 mm, flattened, with furry growth, and indistinct margins, sometimes resulting in leaf fall and shoot dieback.
  • Worse with poor nutrition, poor drainage, too much or too little shade.
  • Cultural control: prune low-hanging branches; check growing conditions – drainage, nutrition, shade, adjust tree density to allow air movement, weed.
  • Chemical control: no recommendations.

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