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https://open.uns.ac.rs/handle/123456789/7167
Назив: | Sensitivity of Cercospora beticola isolates from Serbia to carbendazim and flutriafol | Аутори: | Budakov, Dragana Nagl N. Stojšin, Vera Bagi, Ferenc Danojević D. Neher O. Taški-Ajduković K. |
Датум издавања: | 1-дец-2014 | Часопис: | Crop Protection | Сажетак: | © 2014 Elsevier Ltd. Cercospora beticola, causal agent of Cercospora leaf spot (CLS) of sugar beet, is primarily controlled by fungicides. Benzimidazole and demethylation inhibiting fungicides, including carbendazim and flutriafol, have been widely used in Serbia. Since these fungicide groups have a site-specific mode of action, there is a high risk for developing resistance in target organisms, which is the most important limiting factor in Cercospora leaf spot chemical control. A rapid identification of flutriafol and carbendazim resistance can help researchers in examining the potential of different fungicide resistance management practices, as well as in selection of fungicides for use in the areas where resistance has occurred. One hundred single-conidia isolates were collected from 70 representative locations of the sugar beet production region in Serbia. Evaluation of the isolates' sensitivity was based on the reduction of mycelial growth on medium amended with 1.25μgmL-1 flutriafol and 5μgmL-1 carbendazim. Resistance to flutriafol and carbendazim was detected in 16% and 96% of the tested isolates, respectively. All isolates resistant to flutriafol were resistant to carbendazim as well, which is the first report of a double resistance to fungicides in C.beticola. Detection of the isolates resistant to flutriafol and carbendazim using Cleaved Amplified Polymorphic Sequence (CAPS) markers confirmed the results of the invitro tests. The efficacy of carbendazim, flutriafol, azoxystrobin, and tetraconazole at commercially recommended doses was evaluated in field trials where sugar beet plants in plots were inoculated with a mixture of isolates either sensitive and/or resistant to flutriafol and carbendazim. Carbendazim and flutriafol efficacy was very low in plots inoculated with isolates resistant to these fungicides. Presented results will contribute to development of a pathogen population sensitivity monitoring strategy that could be used for an effective CLS management in the region. | URI: | https://open.uns.ac.rs/handle/123456789/7167 | ISSN: | 02612194 | DOI: | 10.1016/j.cropro.2014.09.010 |
Налази се у колекцијама: | POLJF Publikacije/Publications |
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