White rust Albugo candida (Pers.) Kuntze, 1797 in horseradish crops (Armoracia rusticana G Gaertn., B. Mey. & Scherb., 1800) in the South of the Far East and measures to control it
2021
Matsishina, N.V. | Volkov, D.I. | Fisenko, P.V. | Boginskaya, N.G. | Sobko, O.A. | Gisuk, A.A.
Horseradish is a valuable agricultural crop with gastronomic and medical significance. It contains mono-and polysaccharides, protein compounds and organic acids, minerals and starch, as well as a rich vitamin complex. Unfortunately, horseradish diseases are still insufficiently studied, while crop losses from them can be quite significant. The purpose of our study was to determine the composition of pathogenic fungi on horseradish Armoracia rusticana G. Gaertn., B.Mey & Scherb. and to develop measures to combat them. The research was carried out on horseradish “Atlant” varieties in the plantings of the of FSBSI “Far East Federal Research Center of agrobiotechnology n.a. A.K. Chaika” at 2019–2020. Studies of phytopathogens were carried out in the field conditions and in vitro. Microscopy was performed using Levenhuk D740T, 5, 1 MP. Lifelong injuries photofixation was performed using Sony SAL1855. Processing of the microscopy results was carried out using Outfi, Pluri IQ, Cell Profiler software. In the experiment to study the agent fungicidal efficacy against horseradish diseases, we used: Acrobat WG, Bravo SC, Zummer SC, Consento SC, Infinito SC, Topaz EW, Ordan SP, Thiovit Jet WG, Rajok EW, Proton Extra RG, Ridomil Gold MZ RG The agents were diluted in doses of 10%, 30% and 70% of the recommended dose, the index of conidia occurrence was calculated, phytotoxicity was carried out. For five iterations, the greatest fungicidal activity was demonstrated by the Acrobat WG, Topaz EW and Proton Extra WG agents. The maximum effectiveness was observed for the agent Ridomil Gold MZ WG. The lowest efficiency was shown by the Infinito SC, Consento SC, Ordan SP, Thiovit Jet WG agents. No phytotoxic effect was found in any of the agents.
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