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)