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- Title
Brazilian isolates of Monilinia fructicola from peach do not present reduced sensitivity to iprodione.
- Authors
Dutra, Pamela Suellen Salvador; Pereira, Wagner Vicente; May De Mio, Louise Larissa
- Abstract
The dicarboximide fungicide iprodione has been used in Brazilian peach orchards for more than three decades to control brown rot and there are no studies on sensitivity to Monilinia fructicola in the country. In addition, isolates with reduced sensitivity to other important groups of fungicides have already been reported in Brazilian isolates. The sensitivity of M. fructicola to iprodione was evaluated using discriminatory doses and concentration resulting in 50% inhibition of mycelial growth (EC50) values. In total, 174 isolates collected from the main peach production areas were characterized for fungicide sensitivity. Disease control efficacy (DCE) was determined by comparing lesion inhibition on iprodione treated fruits with those without fungicide treatment. No resistant phenotypes were found in the M. fructicola population and 71.8% of the isolates were extremely sensitive to iprodione. The EC50 values of the isolates ranged from 0.13 to 1.01 μg/mL. DCE in wounded and non-wounded fruit was greater than 85% providing an efficient control in controlled conditions. These results suggest that iprodione could be integrated into disease management programs to prevent the establishment of resistant populations as already reported to other fungicides.
- Subjects
MONILINIA fructicola; IPRODIONE; DICARBOXIMIDES; FUNGAL growth; PHENOTYPES
- Publication
European Journal of Plant Pathology, 2019, Vol 153, Issue 1, p325
- ISSN
0929-1873
- Publication type
Article
- DOI
10.1007/s10658-018-01637-3