Bondi Junction NSW, Australia
Fact Sheets
Taro leaf blight (014)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds


  • Worldwide distribution. On taro and some other edible aroids. An important disease.
  • A blight caused by a water mould, an oomycete, not a fungus. Leaves die early and corm yields are low.
  • Corm infections occur at harvest, resulting in firm, brown rots.
  • Spread is in wind-driven rain, and 'tops' for planting.
  • Cultural control: isolate gardens, far from those with leaf blight, preferably >500 masl; avoid planting suckers with leaves attached; inspect regularly, and remove infected leaves; harvest when leaves are dry; store corms in plastic bags (or plastic-lined boxes); tolerant (bred) varieties are main method of control.
  • Chemical control: copper, chlorothalonil, or mancozeb (protectants); metalaxyl or phosphorous acid (systemics).

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