- Worldwide distribution. In sub-tropics and temperate areas. On cabbage and other brassicas. An important disease.
- Spots, angular, dark with light centres up to 20 mm, with yellow halos, and black spore bodies. Early death of leaves; layers of leaves removed in storage.
- Spread as spores, blown in wind and rain.
- Cultural control: nursery far from production areas; nursery hygiene, soilless or pasteurised soil; 2-3-year crop rotation; avoid overlapping crops; weed; collect and burn trash after harvest.
- Chemical control: chlorothalonil, mancozeb, copper. Treat seed: thiram or hot water (50°C for 30 mins.).
Pacific Pests, Pathogens and Weeds - Online edition
Pacific Pests, Pathogens, Weeds & Pesticides
Cabbage ring spot (286)
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Summary
Common Name
Cabbage ringspot
Scientific Name
Mycosphaerella brassicicola
AUTHOR Grahame Jackson
Information from Pest & disease fact sheet - Mycosphaerella brassicicola. HorticultureWeek. (http://www.hortweek.com/pest-disease-factsheet-mycosphaerella-brassicicola/plant-health/article/1341919); and from (including Photos 1&2) Diseases of vegetable crops in Australia (2010). Editors, Denis Persley, et al. CSIRO Publishing.
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.
