Differential effect of triazoles on mycelial growth and disease measurements of Monilinia fructicola isolates with reduced sensitivity to DMI fungicides

摘要: Abstract Demethylation-inhibitor fungicides (DMIs) are key components for managing Monilinia fructicola populations, even those with demonstrated reduced DMI sensitivity because few effective alternatives available. Rotational fungicide programs that include DMIs would therefore benefit from selection of the most DMI. The goal this study was to investigate in vitro efficacy and vivo potential three triazole reduce brown rot disease caused by M. isolates sensitive or DMIs. Baseline isolate SCDL71.01 propiconazole, tebuconazole, fenbuconazole mean EC 50 values ranging 0.018 0.023 μl ml −1 . Single spore collected an orchard middle Georgia (GADL) were significantly less all triazoles compared SCDL71.01; however, tebuconazole more propiconazole Protective curative applications each on inoculated fruit prevented development. However, there significant differences these when GADL isolates. In protective applications, ( P results indicate differential performances among against