Bondi Junction NSW, Australia
Fact Sheets
2021-09-08T03:16:28.5574201Z
   1
Sweetpotato leaf curl (376)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds

Summary

  • Worldwide distribution. In Oceania, Australia, Papua New Guinea and Solomon Islands. Only known from sweetpotato and ornamental and wild Ipomoea species. Abbreviation is SPLCV. It is a begomovirus.
  • Damage: young plants show upward leaf curling, yellowing and vein swelling; later, symptoms disappear, but yields are reduced. If present with e.g., Sweetpotato feathery mottle virus or Sweetpotato chlorotic stunt virus, yield loss is much greater.
  • Detection: grafting to Ipomoea setosa, or using ELISA and/or PCR.
  • Spread: (i) whiteflies; (ii) cutting used for planting; (iii) sprouts from storage roots. Survival in vines, storage roots, and wild Ipomoea.
  • Natural enemies: preserve predators (ladybird beetles, lacewings, hoverflies), and parasitoids.
  • Cultural control: use planting material from healthy 'seed' scheme (i.e., mother plants regrown from meristems after heat treatments and tested negatively for SPLCV; weed (especially wild Ipomoea species); plant new crops at least 15 m from old crops; rogue diseased plants; and collect and burn or bury debris at harvest.
  • Chemical control: not recommended, uneconomic; if necessary, avoid broad-spectrum insecticides, use insecticidal soaps, white or horticultural oils.

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