Xanthomonas campestris pv. campestris
Bacterial variant causing black rot / From Wikipedia, the free encyclopedia
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Black rot, caused by the bacterium Xanthomonas campestris pv. campestris (Xcc), is considered the most important and most destructive disease of crucifers, infecting all cultivated varieties of brassicas worldwide.[1][2] This disease was first described by botanist and entomologist Harrison Garman in Lexington, Kentucky, US in 1889.[3] Since then, it has been found in nearly every country in which vegetable brassicas are commercially cultivated.[4]
Xanthomonas campestris pv. campestris | |
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Scientific classification | |
Domain: | Bacteria |
Phylum: | Pseudomonadota |
Class: | Gammaproteobacteria |
Order: | Xanthomonadales |
Family: | Xanthomonadaceae |
Genus: | Xanthomonas |
Species: | X. campestris |
Pathovar: | X. c. pv. campestris |
Trionomial name | |
Xanthomonas campestris pv. campestris (Pammel 1895) Dowson 1939 | |
Type strain | |
NCPPB 528 | |
Synonyms | |
Bacillus campestris Pammel (1895) |
Host infection by Xcc can occur at any stage of the plant life cycle. Characteristic symptoms of black rot caused by Xcc are V-shaped chlorotic to necrotic lesions extending from the leaf margins and blackening of vascular tissues.
The pathogen thrives in warm and humid climates and is rapidly disseminated in the field. Use of clean seed, crop rotation, and other cultural practices are the primary means of control of black rot. However, in developing countries such as those in South and Eastern Africa, black rot remains the greatest impediment to cabbage cultivation due to unreliable "clean" seed, multiple croppings annually, and high susceptibility of popular local cultivars to the disease.[5]