Selection of processing tomato progenies for resistance to Ralstonia solanacearum

Fourty-five tomato progenies tested for-resistance to R. solanacearum strains 788 (biovar I) and ST (biovar LII). Four progenies tested with 788 and six progenies tested with ST were selected for field experiments. In relation to strain 788, only P-47 showed some resistance while in relation to ST all the progenies showed moderate resistance. In the first growing period, strain 788 showed bacterial wilt after 7 d while in the second it was detected only 14 d after transplanting. In the first and second growing periods, strain ST caused bacterial wilt 7 d after transplanting in all tested materials except for P-22. The monomolecular model was the most appropriate function to describe the epidemic incidence in most of the tested materials.