Ralstonia solanacearum: secrets of a major pathogen unveiled by analysis of its genome.

Summary Ralstonia solanacearum Taxonomy: Bacteria; Proteobacteria; beta subdivision; Ralstonia group; genus Ralstonia Microbiological properties: Gram-negative, aerobic, motile rod. Disease symptoms: Agent of bacterial wilt of solanaceous plants, which appears as a sudden wilt. Typically, stem cross-sections ooze a whitish bacterial exudate. R. solanacearum is also the agent of the Moko disease of banana and brown rot of potato. Disease control: Pathogen-free seed and transplants. Few resistant and tolerant plant lines. Sanitation and cultural rotations. Useful web sites: http://ibws.nexenservices.com/;http://sequence.toulouse.inra.fr/R.solanacearum.html.