The Streptomyces diastatochromogenes sk-6 was a strong antagonist of soft rot bacteria E. carotovora ssp. carotovora in 10⁶ spore/ml dose. This was confirmed through the in vitro and storage experiments. The ability of this isolate to suppress the growth of phytopathogenic bacteria E. carotovora ssp. carotovora makes it a potential biocontrol agent for reducing the soft rot infection of potato tubers in the storage period. Streptomyces diastatochromogenes sk-6 as a biological disinfectant could destroy surface and internal infection, protect the
tubers from the growth of phytopathogenic bacteria in the early period of their reproduction, and improve the overwintering of winter crops