PHF12 and infection: The pre-inoculation application of two strains of the plant-growth-promoting rhizobacterium (PGPR), Pseudomonas fluorescens viz., Pf1 and CHAO were found to be effective in inducing systemic resistance (ISR) against the causal agent of ULCD in blackgram (Vigna mungo), resulting in reduced ULCD infection [116].