Xanthomonas citri

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Contents


1262020
Taxonomy
Kingdom: Monera
Phylum: Proteobacteria
Class: Gammaproteobacteria
Order: Xanthomonadales
Family: Xanthomonadaceae
Genus: Xanthomonas
Species: citri
Scientific Name
Xanthomonas citri
(ex Hasse 1915) Gabriel et al. 1989
Scientific Name Synonym
Xanthomonas axonopodis pv. citri
(Hasse 1915) Vauterin et al. 1995
Common Names and Diseases

citrus canker

Overview

Origin
Xanthomonas citri, Citrus canker is a very contagious bacterial disease that affects all types of citrus. It is believed that X. citri originated in Southeast Asia
Signs and Symptoms
X. citri causes premature leaf and fruit drop. Symptoms include lesions on the fruit, foliage and twigs and usually appear from 1-2 weeks after infection. The entire tree can be defoliated. X. citri effects on fruit range from severe blemishes on the fruit to premature fruit drop.
Distribution
X. citri was spread to Japan, South Africa, Australia, the Pacific Islands, South America, and the United States. The hurricanes in 2004 and 2005 spread X. citri so far that eradication was no longer feasible in the United States.
Control Efforts
Control of X. citri is achieved through a combination of tactics. These include the use of disease resistant plant varieties, use of protective sprays, and phytosanitary measures. State quarantines may help slow further spread of X. citri until studies can be done to determine the most effective management plans.

References

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