Liberibacter africanus

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Candidatus Liberibacter africanus Jagoueix et al., 1994 - (African huanglongbing)

The pathogen causes the African form of citrus greening which has been recognized as a serious citrus disease since the 1920s. The bacterium lives and moves within the sieve tubes of the host plant. It is suspected to have evolved in native Rutaceous species, since citrus is not native to Africa. In fact, the subspecies Candidatus Liberibacter africanus subsp. capensis infects Cape chestnut (Calodendrum capense) in South Africa. The disease is transmitted by the African citrus psyllid (Trioza erytreae) in a propagative, circulative and persistent manner. After entering the hemolymph of the psyllid, it moves into the salivary glands and subsequently back into the host plant. The Gram-negative bacterium is nonculturable, not flagellate and heat sensitive. It belongs to the Rhizobiaceae (α-proteobacteria).

Vernacular names
• English: African citrus greening
African huanglongbing
• Français: huanglongbing africaine

Synonyms:
Liberobacter africanum

See also the more important huanglongbing pathogen, Candidatus Liberibacter asiaticus.