Testing of laboratory samples of microbiological preparations based on promising producer strains for the control of apple scab

To prevent phytosanitary destabilization in apple agrocenoses, it is necessary to include ecologically safe microbiological preparations the protection systems. In Krasnodar region 2016 and 2019 field, laboratory samples of were tested formulation “wettable powder” from collection biological method FGBNU VNIIMK against Venturia inaequalis (Cooke) G. Winter. Of 9 2016, highest efficiency, approaching effectiveness a chemical fungicide, was shown by based on fungal producer strains: RK-1, XK-1 T-2 - 76.9-92.5%. 2019, all variants (in amount 4) using more effective comparison with active substance origin. The best scab control provided sample three-component mixed preparation two one bacterial strain RK-1 + B-12 83.0-84.9%. isolated are promising for research creation scab.