About the disease

  • huanglongbing can be found throughout Asia, the Middle East, Africa and North and South America
  • leaves and shoot symptoms include yellow shoots; asymmetric, mottled (across veins) leaves; small upright chlorotic leaves; out of phase flushing; and branch dieback
  • flower and fruit symptoms include unseasonal and heavy flowering on diseased branches; small, lopsided, bitter-tasting fruit with small, brown, aborted seeds and uneven colouring at maturity; and excessive fruit drop
  • symptoms can be confused with mineral deficiencies and other endemic pathogens
  • spread by infected plant material or by the Asiatic citrus psyllid (Diaphorina citri) or African citrus psyllid (Trioza erytreae)
  • all citrus and many citrus relatives are susceptible to huanglongbing and host to its vectors

More information

Huanglongbing (Department of Agriculture)

Huanglongbing/citrus greening (Plant health Australia)

African and Asian citrus psyllid (Plant Health Australia)