- Worldwide distribution. In tropics and sub-tropics. On more than 200 hosts in more than 30 plant families. Several races. Race 1 infects eggplant, capsicum, chilli, potato, tomato and tobacco, and other families. An important disease.
- High temperature and rain favours disease. Bacteria block the water-conducting tubes causing a wilt.
- Place cut stem in water to see 'streaming'.
- Cultural control: avoid infested land; use 4-year rotation, with maize, soybean, brassicas, rice; plant on ridges/raised beds to improve drainage; remove wilted plants immediately; remove soil from shoes, machinery, and tools; graft tomato onto relatively bacterial wilt-resistant eggplant; use resistant varieties.
- Chemical control: none recommended.
Pacific Pests, Pathogens, Weeds & Pesticides
Tomato bacterial wilt (146)
Photo 1. Capsicum with bacterial wilt, Ralstonia solanacearum, showing wilt, leaf fall and dieback, rather than a sudden wilt.
Photo 2. Tomato with bacterial wilt, Ralstonia solanacearum, showing sudden wilt of leaves over entire plant.
Bacterial wilt, bacterial wilt of potato, bacterial wilt of Solanaceous crops
Ralstonia solanacearum. There are a number of races.
AUTHOR Grahame Jackson
Information (and Photo 1) from Gerlach WWP (1988) Plant diseases of Western Samoa. Samoan German Crop Protection Project, Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ) Gmbh, Germany; and (with Photo 5) Diseases of vegetable crops in Australia (2010) Editors, Denis Persley, et al. CSIRO Publishing. Photo 3 Anare Caucau, Research Division, Ministry of Agriculture, Fiji. Photo 4 Mike Furlong, University of Queensland, Brisbane.
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.