The phytopathogenic fungus Pyrenophora tritici-repentis is a causal agent of tan spot. Antagonistic microorganisms can be used as non-chemical alternative treatment against the spot wheat. Bacillus velezensis BZR 336 g and 517 stains were selected most active potential biocontrol agents. We found that B. strains exhibited antagonistic activity P. Kr-15/2016 in vitro: they inhibited mycelium gro...