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Virulence of Ralstonia solanacearum strains on tomato plants. Bacterial wilt on 8‐week‐old tomato plants inoculated by leaf infiltration (a) and root dipping (b) with R. solanacearum strains OE1‐1, OE1‐1‐lecM::EZ‐Tn5 (lecM mutant) and the lecM mutant complemented with native lecM (lecM‐comp). Plants were rated on the following disease index scale: 0, no wilting; 1, 1%–25% wilting; 2, 26%–50% wilting; 3, 51%–75% wilting; 4, 76%–99% wilting; 5, dead.
