Fig. 3.

Prevention of bacterial wilt by treatment with φRSL1. One-month-old tomato plants (20 to 23 cm in height) pretreated with tap water (A, control) or φRSL1 (B) were inoculated with R. solanacearum cells as described in Materials and Methods. Wilting symptoms were graded from 0 to 5 as follows: 0, no symptoms; 1, only one petiole was wilting; 2, two to three petioles were wilting; 3, all but two to three petioles were wilting; 4, all petioles were wilting; and 5, the plant died. (C) Tomato plants observed at 18 days p.i.