Bondi Junction NSW, Australia
Fact Sheets
Sweetpotato scab (013)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds


  • Worldwide distribution. On sweetpotato. A common, and sometimes serious fungal disease.
  • Worse in wet weather.
  • Young leaves infected early, especially along veins causing them to distort as they expand.
  • Spread is by water splash, wind-driven rain, and on planting material.
  • Cultural control: tolerant varieties, which exist in most countries. If susceptible varieties are needed, grow cuttings from sweetpotato storage roots, in a nursery far from production areas.
  • Chemical control: mancozeb when symptoms first occur, but likely to be uneconomic.

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