Bondi Junction NSW, Australia
Fact Sheets
Sweetpotato feathery mottle (258)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds


  • Worldwide distribution. On sweetpotato and wild relatives. Several strains. An important virus disease.
  • Occurs either alone or with other viruses.
  • Difficult to identify on symptoms alone. Symptoms variable: yellow or purple spots, or purple bordering veins, sometimes only on a few leaves before recovery. One strain causes cracks around storage roots.
  • Spread by aphids. Spread is fast: aphids pick up the virus from diseased leaves and can straight away pass it to healthy leaves next time they feed. Ability to spread virus quickly lost.
  • Cultural control: difficult – symptoms unclear; use pathogen-tested planting material (see SPC CePaCT); avoid planting near older crop; weed.
  • Chemical control: none recommended. Impractical to control aphids using insecticides to prevent spread by viruses. Spread occurs before insecticide kill the aphids.

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