Bondi Junction NSW, Australia
Fact Sheets
2021-09-08T03:16:36.3363499Z
   7
Sweetpotato weevil (029)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds

Summary

  • Worldwide distribution. On sweetpotato and wild Ipomoea (morning glory). An important pest.
  • Adults lay eggs in base of the stem ('crown') and in storage roots, and larvae tunnel through them. Adults eat the leaves and surface of the vines.
  • Damage is the same as done by West Indian weevil. Worse in dry times, and in light sandy soils.
  • Spread by adults on the wing, and in cuttings and storage roots.
  • Cultural control: early, deep rooting varieties; plant only tip cuttings; remove wild morning glory; hill-up, covering cracks during dry times; ideally, make one-time harvest; 3-4-year crop rotation; after harvest, collect and destroy vines and infested storage roots.
  • Chemical control: treat vines (bifenthrin); treat plants in field every 3-4 weeks (bifenthrin or fipronil).

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