Screening of indigenous rhizobacteria as potential biological control against faba bean (Vicia faba L.) gall disease caused by Olpidium viciae

Abstract Background Emerged faba bean gall disease attacks the stem and leaves of plant results in complete crop losses. This study was initiated to screen multi-trait rhizobacteria for their antagonistic efficacy under in-vitro in-vivo conditions against Olpidium viciae control effect on bean. Sixty isolates were first examined morphological, biochemical, phenotypic traits. Results Pseudomonas fluorescens AAUPF62, P. aeruginosa AAUS31, Bacillus AAUMF42, AAUAm28 showed greater than 68, 62, 57, 54% suppression O. dual culture, volatile metabolites, culture filtrate assay, detached experiments, respectively. The revealed that early treatment with AAUS31 reduced severity by 63% (in FB-Obse) FB-26869) varieties. co-inoculation AAUPF62 significantly enhanced shoot ( P = 0.003; mean 122 cm) root 0.018; 94 length, increased dry weight 8 factors (83 g pot −1 ), final 92% FB-Obse variety. Conclusions strains could be potential agents disease. use moderately resistant varieties synergistic bioagents recommended.