Pacific Pests, Pathogens & Weeds - Mini Fact Sheet EditionCabbage light leaf spot (302)
Pacific Pests, Pathogens & Weeds - Mini Fact Sheet EditionCabbage light leaf spot (302)
Summary
- Worldwide distribution. Plants in cabbage family, particularly, Chinese cabbage, cauliflower, turnip, mustard, and related weeds. Common fungal disease, but only ocassionally severe.
- Leaf spots round to angular, up to 8 mm diameter, pale brown or white with a dark brown margin.
- Spread in rain and wind; survives in trash, on volunteer plants, weeds and seed.
- Cultural control: certified seed; nursery hygiene: clean trays, pasteurise soil or use soilless mixes; weed, remove volunteers; avoid overlapping crops, or plant new crops far from old; collect and destroy debris after harvest; crop rotation.
- Chemical control: treat seed with captan, thiram or mancozeb (if not certified); in field use chlorothalonil, copper or mancozeb.
Common Name
Cabbage light leaf spot, frog-eye leaf spot
Scientific Name
Cercospora brassicicola
AUTHORS Grahame Jackson & Eric McKenzie
Information from Smith S (2012) Diseases of turnip and mustard greens, Division of Agriculture, Research & Extension, University of Arkansas System. (https://www.uaex.edu/publications/PDF/FSA-7549.pdf). Photo 1 Clemson - USDA Cooperative Extension Slide Series, Bugwood.org. 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.
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