Pacific Pests & Pathogens - Mini Fact Sheet EditionTomato bacterial spot (081)
Pacific Pests & Pathogens - Mini Fact Sheet EditionTomato bacterial spot (081)
Summary
- Worldwide distribution. In tropical and temperate countries. On tomato, capsicum, chillies and weeds in the potato family. An important disease.
- Spots are numerous, small (3 mm), sunken on upper surface, slightly raised below, merging at leaf tips and margins. Leaves turn yellow and fall. Spots also on leaf stalks and stems. Fruits infected via wounds.
- Spreads by seed, rain splash, handling wet plants.
- Cultural control: 2-3-year rotation; weed, resistant varieties (capsicum); healthy seed (hot water 50°C 25 mins.) and seedlings; trickle irrigation; mulch; weed; collect and burn trash after harvest.
- Chemical control: copper or mancozeb at 7-10 day intervals.
Common Name
Bacterial spot of tomato and pepper, bacterial scab, black spot
Scientific Name
Xanthomonas vesicatoria. Previously, Xanthomonas campestris pv. vesicatoria. Several strains are recognised, infecting tomato, pepper or both.
AUTHORS Helen Tsatsia & Grahame Jackson
Information CABI (2014) Xanthomonas vesicatoria Crop Protection Compendium (http://www.cabi.org/cpc/). Photo 3 Diseases of vegetable crops in Australia (2010). Editors, Denis Persley, Tony Cooke, Susan House. CSIRO Publishing. 1An alternative treatment is to soak seed in 1.3% solution of sodium hypochlorite for 1 min, then rinse and dry.
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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