Efficacy of New Local Bacterial Agents against Pyrenophora tritici-repentis in Kuban Region, Russia

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 growth by 72.4–94.3% caused its degenerative changes. Treatment seeds plants with provided biological efficiency 31.2–38.4% spot, while artificial inoculation only 28.4–43.8% efficiency. three-year field trial demonstrated 24.6–50% 5.0–7.6% additional yield. conclude are promising options for novel bioproducts control