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2019, vol. 47, iss. 5, pp. 330-336
Efficacy of fungicides in sugar leaf spot (Cercospora beticola Sacc.) control
aUniversity of Novi Sad, Faculty of Agriculture
bPoljoprivredna stručna služba, d.o.o., Senta

emaildragana.budakov@polj.edu.rs
Abstract
Cercospora beticola Sacc., causer of the sugar beet leaf spot is the economically most important pathogen of sugar beet. Control of this disease is carried out by applying measures within the integrated disease management, which includes good soil cultivation, pre-sowing preparation and optimal nutrition of crops to increase plant vitality. Application of fungicides is crucial for ensuring effective disease control as well as high yield or quality of sugar beet root. Today, fungicides from the chemical groups of dithiocarbamate, benzimidazole, morpholine and strobilurine are used to control sugar beet leaf spot. The efficacy of mancozeb and tebuconazole-based fungicides in the control of C. beticola with known sensitivity to these active substances was investigated during this study. Isolates were collected after the appearance of the first disease symptoms and before the application of the fungicides, while their sensitivity was tested in vitro. Obtained EC50 values, as well as the biological efficacy of applied fungicides indicated a decrease in the sensitivity of C. beticola isolates to mancozeb and tebuconazole. The highest efficacy was achieved by combining these two active substances with a different mechanism of action.

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article language: Serbian
document type: unclassified
published in SCIndeks: 20/12/2019

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