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Influence of modern fungicidal preparations on potato disease incidence

Studies on the technical and economic efficiency of NORDOX 75WG and VERNO FG with additional preparations Banjo Forte, Kurzat R and Zorvek Incantia®, has identified that plants were affected by late blight from 1.9 % to 10.8 %. Alternaria infection was detected in all variants at levels ranging from 1.8 % to 34.5 %. At the end of the second decade of July the development of Alternaria continued to progress and the spread of the disease ranged from 1.9 and 9.7 % to 34.5 and 28.9 %. The spread of the disease was established within the range of 68.7– 81.3 %. On average, the technical effectiveness against Alternaria of Nordox 75WG (1.0 kg/ha) was 72.5 %, Nordox 75WG + systemic preparations used by the Institute – 94.4 %; the effectiveness of Verno FG (0.25 kg/ha) was 44.8 %, Verno FGV (0.5 kg/ha) – 41.3 %, with systemic preparations of the Institute respectively, 56.6 % and 55.7 %. According to the results of tuber analysis, it was found that the disease incidence was respectively: rhizoctonia from 2 and 2.4 % to 1.1 and 0.5 %, common scab from 24.3 and 9.9 % to 2.9 and 1.6 %, dry rot from 26.7 and 15.2 % to 9.3 and 5.9 %. When using Nordox 75WG and Nordox 75WG + systemic fungicides of the Institute, the best results were obtained in protecting tubers from diseases, so the incidence of common root rot was 0.5 and 0.3 %, rhizoctonia – 0.5 %, dry rot – 6.9 and 5.9 %. The total percentage of healthy tubers was 90.7 and 94.1 %. The overall effectiveness of the preparations was as follows: Nordox 75WG: rhizoctonia – 71.4 %, common scab – 89.6 %, dry rot – 65.3 %; Nordox 75WG + systemic fungicides of the Institute – 76.8 %, 94.2 % and 74.7 % respectively; Verno FG, 0.25 kg/ha – 53.6 %, 46.0 % and 65.3 %; Verno FG, 0.25 kg/ha + systemic fungicides of the Institute – 36.3 %, 67.5% and 64.5 %; Verno FG, 0.5 kg/ha – 62.5 %, 50.3 % and 58.5 %; Verno FG, 0.5 kg/ha + systemic fungicides of the Institute – 66.1 %, 68.7 % and 65.3 %.

Key words: potatoes, damage, protection, fungicides, technical efficiency. 

Liashchenko S.


А. Rozhniatovskyi


Matusievich G. https://orcid.org/0009-0008-6513-5287


Zakharchuk N.


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AGROBIOLOGY №2 2025