FORMATION OF PHYTOPATHOGENIC BACKGROUND IN TOMATO (SOLANUM LYCOPERSICUM L.) AGROCENOSES UNDER THE ACTION OF GROWTH STIMULATORS
DOI:
https://doi.org/10.32782/naturaljournal.16.2026.2Keywords:
micromycetes, biological products, seeds, biological protection, agroecosystem, solanaceaeAbstract
The article highlights the results of a study of the features of the formation of the phytopathogenic background in tomato (Solanum lycopersicum L.) agrocenoses under the conditions of the use of growth stimulants in the organic production system. The relevance of the work is due to the need to find environmentally safe methods of regulating the pathogenic complex, since in organic farming the use of synthetic plant protection products is significantly limited, and phytopathogenic microorganisms remain one of the main factors reducing crop yields. The aim of the study was to assess the impact of Radifarm and RootStar biostimulants on the species composition, frequency of occurrence and structure of dominance of phytopathogenic microorganisms associated with tomato seeds and plants at the early stages of ontogenesis. The study was conducted in field and laboratory conditions using the Seven variety and the MRT 8158 F1 hybrid, which made it possible to compare the reaction of different genotypes of the crop to the action of bioregulators. The work used a complex of mycological, microbiological, phytopathological, visual and statistical methods of analysis. It was found that the seeds of the Seven variety were characterized by a higher level of contamination by pathogenic microorganisms compared to the MRT 8158 F1 hybrid, which indicates a greater susceptibility of varietal forms to infectious load. The use of growth stimulants contributed to a significant reduction in the frequency of occurrence of most phytopathogens in the studied agrocenoses. The highest bioregulatory efficiency was demonstrated by the drug RootStar, especially in the variant with the MRT 8158 F1 hybrid, where a significant reduction or complete elimination of dominant and subdominant pathogens was noted. The results obtained confirm the feasibility of combining hybrid forms of tomatoes with the use of growth stimulants as an environmentally safe and effective approach to regulating the phytopathogenic background and stabilizing mycobiota in tomato agrocenoses.
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