Pacific Pests, Pathogens and Weeds - Online edition

Pacific Pests, Pathogens, Weeds & Pesticides

Citrus psyllid (185)

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  • 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.
Common Name

Asian (or Asiatic) citrus psyllid

Scientific Name

Diaphorina citri

AUTHOR Grahame Jackson
Information from CABI (2020) Diaphorina citri (Asian citri psyllid). Crop Protection Compendium. (; and Asian citrus psyllid Diaphorina citri (2019). Department of Agriculture Water and the Environment. (; Plant Biosecurity and Product Integrity (2017) Asian citrus psyllid. Department of Primary Industries, NSW, Australia; and from Asian citrus psyllid (undated) Department of Employment, Economic Development and Innovation. Biosecurity Queensland. (; and from Asian citrus psyllid (2019) Business Queensland. Queensland Government ( Photos 1&3 David Hall, USDA Agricultural Research Service, Photo 2 Michael Rogers, University of Florida. Photo 4 Michael Rogers, University of Florida. Photo 5 JM Bove, INRA Centre de Recherches de Bordeaux, Photo 6 Jeffery W. Lotz, Florida Department of Agriculture and Consumer Services, Photo 7 HD Catling,

Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community.

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