Fact Box: What is Citrus greening?

Citrus greening or Huanglongbing is a deadly disease of citrus which greatly affects the production of the fruits in several parts of India.
Causing agents:

  • It is caused by motile bacteria, Candidatus Liberibacter


  • Yellowing of leaf veins and adjacent tissues
  • Premature defoliation
  • Dieback of twigs
  • Decay of feeder rootlets and lateral roots.
  • Infected fruits are small, lopsided with bitter taste, may fall prematurely

How does it spread?

  • In India the bacteria are spread by a vector- the Asian citrus psyllid (Diaphorina citri).
  • It is a sap-sucking, hemipteran bug in the family, Psyllidae.

How can it be controlled?

  • It can be managed by focus Integrated Pest Management (IPM) efforts using disease-free nursery trees, reducing infection sources (inoculum) by frequent surveys and diseased tree removal, and suppressing Asian citrus psyllid through area-wide management.



Latest E-Books