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The current study aimed to identify the survival of bio-control bacteria with antifungal activity against  Fusarium oxysporum  and assess their growth promoting activity in wheat crop field conditions. To evaluate the fungicidal activities of isolated bacteria using the dual culture method, both qualitative and quantitative bioassays were performed. Plant Growth Promoting activities such as Indole 3-Acetic Acid (IAA), phosphate solubilization, Hydrogen cyanide (HCN), and Siderophore production were assessed for three biocontrol bacterial isolates (BCB 07, BCB16, and BCB 83) out of 180 with 70% antagonistic activity against  Fusarium oxysporum . Chitinase, protease, and cellulase interaction in isolates was also tested. BCB16 was selected as it had 70% antagonist activity against  F. oxysporum  but also had the highest PGPR (Plant Growth Promoting Rhizobacteria) traits when compared to the other two isolates. BCB16 was also tested for survival in talc powder and in wheat crop field conditions. Even after 4 months in talc powder, the survival rate remained stable. In a wheat crop field, BCB16 reduced the disease incidence of  Fusarium oxysporum  by 54.38%. When compared to fungus alone treatment, BCB16 increased average yield by 57% alone and 32% in challenged conditions. BCB16 was identified molecularly using the 16s rRNA gene.  Bacillus amyloliquefaciens  shared 97% of the deduced sequence. The sequence was submitted to genbank and assigned the accession number OM333889.  Bacillus amyloliquefaciens  has the potential to be used in the field as an alternative to synthetic fungicides against  Fusarium oxysporum .

Biocontrol rhizobacteria enhances growth and yield of wheat ( Triticum aestivum ) under field conditions against Fusarium oxysporum