Biocontrol of common scab in potato cultivation

Abstract

An assessment was made of the phytosanitary condition and yield of potatoes when treating tubers with biological fungicides in the Republic of North Ossetia – Alania. Preliminary conclusions have been made about a reduction in the development of tuber infections and an increase in potato yields under the influence of tested biological products. The use of biological control agents increases the biological activity of phytopathogenic organisms by introducing a competitor or inhibitor. This includes reducing the use of chemical pesticides in food production, as well as increasing the sustainability of production areas by increasing microbial populations, reducing production costs and stimulating plant growth. Bacillus subtilis is the most studied microorganism in agriculture for the control of plant diseases. The effect of treating tubers and spraying plants with biological preparations “BisolbiSan”, “Fitodok” and “Baktofit” on the infection of potato tubers with Streptomyces scabies. Was studied in 2021–2023. “Sinkler SK“ was used as the standard fungicide. Scientific novelty is that biological preparations showed excellent field performance against common scab in the foothill zone of RNO-Alania. Therefore, the objective of our study was to evaluate the effect of biological agents in the control of common scab. The tasks included obtaining data on the effects of tuber dressing and spraying plants with biopreparations on potato scab infestation during the vegetation period.The tasks included obtaining data on the effects of tuber dressing and spraying plants with biopreparations on potato scab infestation during the vegetation period. Research were carried out according to the methods accepted in potato breeding according to the recommendations of VNIIKH, VIR and VIZR. The results obtained in field experiments show that in all four years of research these preparations significantly reduced the infestation of tubers with Streptomyces scabies “BisolbiSan” biopreparation, which was used for tuber dressing and spraying of plants four times during the growing season, showed the best protective effect against Streptomyces scabies.