Bondi Junction NSW, Australia
Fact Sheets
Citrus psyllid (185)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds


  • Worldwide. On members of the citrus family, especially grapefruit, kumquat, lemons, limes, mandarin, orange, pomelo and tangelo, and the ornamentals, mock orange, and the curry tree. An important pest.
  • The psyllid: (i) sucks sap damaging shoot tips; (ii) spreads huanglongbing (greening) bacteria; (iii) produces honeydew, which covers leaves and is turned black by sooty moulds.
  • Eggs laid in shoot tips; nymphs produce thread-like long wax. Adults feed at 40 degrees to surface.
  • Spread in wind, and in the trade in citrus plants.
  • Biosecurity: many countries in the Pacific and elsewhere are free from the psyllid.
  • Cultural control: check plants in nurseries; teach farm staff to identify psyllids, and to report to government authorities if seen.
  • Chemical control: PDPs: neem or pyrethrum; synthetic pyrethroids or neonicotinoids.

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