Bondi Junction NSW, Australia
Fact Sheets
2021-09-08T03:11:13.8824604Z
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Cassava green mite (438)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds

Summary

  • Restricted. Africa, North (Mexico) and South America, the Caribbean (Dominican Republic, Trinidad and Tobago). It is NOT recorded in Oceania.
  • Serious pest of cassava (and relatives). Defoliation, low root yield, and poor quality cuttings for next crop.
  • Mites pierce leaves, sucks out juices, causing yellowing, curling, death. Leaves fall, terminal buds die giving stems characteristic ‘candle stick’ appearance.
  • Eggs laid on leaves, producing larvae (six legs), then nymphs and finally yellowish-green adults, about 0.8 mm long. Higher populations in dry times. Note, there are other similar species, so samples need to be examined by experts.
  • Spread by walking, in wind or in water. Long distance spread on vehicles, on cuttings share between farmers, on nursery plants, or on leaves taken to market.
  • Biosecurity: prohibit unregulated cassava introductions; follow FAO Technical Guidelines for cassava germplasm moved internationally; use only virus-tested tissue cultures.
  • Natural enemies: key predator is Typhlodromalus aripo, together with Typhlodromalus manihoti.
  • Cultural control: IITA have bred tolerant varieties.
  • Chemical control: not recommended.

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