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

Symptoms:

  • 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.

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Categories: Science and Technology Current Affairs - 2018

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