Preparation of different origin impact on zoosporangium viability of potato wart causative agents Synchytrium endobioticum (Schilbersky) Percival

Abstract

Goal. To determine the technical efficiency of chemical, biological and new synthesized drugs in controlling the causative agent of potato cancer.
 Methods. For research, soil samples were used, taken from the foci of the causative agent of cancer before and after treatment with the following drugs: chemical — Emesto Quantum, 273.5 FS (clothianidin, 207 g/l + penflufen, 66.5 g/l), Consento 450 SC (phenamidon, 75 g/l, + propamocarb hydrochloride, 375 g/l); biological — Fitodoktor, p. (Bacillus subtilis bacteria, IMV B-7100 (26D), titer 5 ќ 10 9/g of the drug), Planryz, genus. (Pseudomonas fluorescens bacteria, piece AP 33, titer 3.0 ќ 10 9 cm3); synthesized — onium derivatives of 4-aryl-5-methoxycarbonyl-3.4-dihydropyrimidin-2-one. Soil samples for the detection of pathogens from one soil sample were taken by standard methods according to EPPO Standards PM 7/28 (2), with the geolocation of the sampling points recorded by the Garmin eTrex Legend GPS navigator. Zoosporangia of the causative agent of cancer were isolated by flotation in the «RUTA» device in sodium iodide solution. The viability of zoosporangia was determined using Coomassie blue G-250 solution. The effectiveness of the drugs was determined according to the methods of testing and application of pesticides (Trybel S. and others).
 Results. For 2019—2021, the effect of chemical and biological preparations on the viability of zoosporangia of the causative agent of potato cancer was investigated. As a result of treatment with the synthesized chemical onium derivative 4-aryl-5-methoxycarbonyl-3.4-dihydropyrimidin-2-one, the efficiency was 71.4%; Emesto Quantum, 273.5 FS — 48.4%; Consento 450 SC — 82.3%. As a result of the action of the biological drug FitoDoctor, the effectiveness was 25.8%; Planriz, genus. — 32.3%.
 Conclusions. To protect potatoes from the disease, it is recommended to use biological and onium derivatives of 4-aryl-5-methoxycarbonyl-3,4-dihydropyrimidin-2-one, which will allow to reduce the number of viable zoosporangia of the pathogen in the soil in 3—5 years and thereby reduce the pesticide press in potato growing and improve the ecological condition of the environment.