Bondi Junction NSW, Australia
Fact Sheets
Taro hornworm (032)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds


  • Widespread distribution. In tropical and temperate Asia, Oceania. An important pest.
  • Eggs are laid on the leaves and petioles. Mature caterpillars eat between veins, sometimes all the leaf.
  • Look for the horn and the large eye spots.
  • Outbreaks uncommon because of natural enemies, and other control measure not needed.
  • Natural enemies: parasitoid wasps.
  • Cultural control: visit garden regularly; handpick caterpillars; allow chickens into the taro fields.
  • Chemical control: not usually required. If needed, use PDPs: neem, pyrethrum, or chilli; use products from bacteria, e.g., spinosad or Bt (Bacillus thuringiensis) on young caterpillars. Alternatively, use synthetic pyrethroids, but likely to kill natural enemies.

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