No abstract

Twenty-one isolates of bacteriophages specific to eleven target strains of Xanthomonas campestris pv. campestris were isolated from soil samples collected under black rot-infected cabbage plants. After the analysis of phagotyping for seventy-three phytopathogen strains against newly isolated isolates and four collection strains of bacteriophages, it was proposed to construct a phage cocktail including 6 isolates In vitro screening of protective from ultraviolet radiation substances under the UV-B range showed that skim milk (0.75%), Riboflavin (0.5%) and ascorbic acid (0.1%) showed the highest effect for bacteriophages. Under the conditions of a film greenhouse, the best protective effect from solar UV radiation on the 8th day after spraying cabbage was shown by the option with the addition of skimmed milk (0.75%) and Riboflavin (0.5%). According to our data, these substances can provide a long-term photoprotective effect of the bacteriophage preparation..

Приведены данные двухлетнего исследования по поиску эффективных препаратов для обеззараживания семян капусты от сосудистого бактериоза. Наилучший результат был получен при предпосевной обработке 0,15%-ной надуксусной кислотой. При этом биологическая эффективность составляла 94,1–97,6%, что значительно превышало соответствующий показатель в эталонном варианте – Фитолавин, ВРК, 0,2% (69,0–72,0%). Показано, что заблаговременная обработка семян НУК (за 550 суток до посева) не оказывала достоверного влияния на их лабораторную всхожесть.Presented data are the result of a two-year study aimed at identifying effective preparations for the disinfection of cabbage seeds from black rot. The best result was obtained by presowing treatment with 0.15% peracetic acid. In this case, the biological efficiency was 94.1–97.6%, which significantly exceeded the corresponding indicator in the reference variant – Phytolavin, VRK, 0.2% (69.0–72.0%). The study has not revealed any significant effect of advance treatment of seeds with peracetic acid (550 days before sowing) on their laboratory germination.