- Worldwide distribution. On members of the cabbage (brassica) family, e.g., broccoli, Brussels sprouts, cabbage, cauliflower, Chinese cabbage, radish. An important disease.
- Bacteria enter natural openings at the leaf edge, and travel along veins, causing V-shaped rots, yellowing and death. Head rots develop, too.
- Spread in rain, in seedlings, soil on machinery, shoes and in seed. Survives in debris and weeds.
- Cultural control: certified seed or hot water (50°C for 25 mins); nursery hygiene: clean trays, pasteurise soil or use soilless mixes; monitor, and discard infected plants; well-drained fields, if necessary use raised beds; space plants for air circulation; weed; collect and burn debris or plough in remains after harvest; 3-4-year crop rotations.
- Chemical control: not recommended.
Pacific Pests, Pathogens, Weeds & Pesticides
Cabbage black rot (131)
Photo 1. Several patches of black rot, caused by the bacterium, Xanthomona campestris pv. campestris, at the margin of the older leaves.
Photo 2. Close-up of the V-shaped region at the edge of the cabbage leaf caused by the black rot bacterium, Xanthomonas campestris pv. campestris. Note the blackened veins.
Brassica black rot, black rot of cabbage
Xanthomonas campestris pv. campestris
AUTHOR Grahame Jackson
Information from (including Photos 1&4) Diseases of vegetable crops in Australia (2010). Editors, Denis Persley, et al. CSIRO Publishing; and CABI (2019) Xanthomonas campestris pv. campestris. (black rot). Crop Protection Compendium. (https://www.cabi.org/cpc/datasheet/56919); and from Vicente JG, Holub EB (2012) Xanthomonas campestris pv. campestris (cause of black rot of crucifers) in the genomic era is still a worldwide threat to brassica crops. British Society for Plant Pathology. (https://bsppjournals.onlinelibrary.wiley.com/doi/10.1111/j.1364-3703.2012.00833.x). Photo 2 David B. Langston, University of Georgia, Bugwood.org.
Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community.