Currently there is very limited knowledge available regardingthe biological suppression of black rot in cabbage by induced sys-temic resistance. Objectives of this study were to 1) screen individ-ual PGPR strains in vitro for multiple traits reported to be related togrowth promotion and induction of systemic resistance to black rotin planta, and 2) form mixtures of PGPR strains based on resultsfrom objective 1 and evaluate them in the greenhouse and field