Efficacy of Demethylation Inhibitor Preharvest Fungicide Applications for Control of Postharvest Brown Rot in a Late-Ripening Peach in Northern Georgia (U.S.A.), 2024

Brown rot, caused by the pathogen Monilinia fructicola, is an economically important disease of peach, Prunus persica. The disease infects fruit, resulting in rots that render the fruit unmarketable. This report evaluates the efficacy of several demethylation inhibitor preharvest fungicides for the control of brown rot in Watkinsville, Georgia (U.S.A.), on a block of ‘O'Henry’ peaches in 2024. The results of this trial will help peach growers make better management decisions for control of brown rot. Of the materials applied, Cevya (mefentrifluconazole) and Tebucon (tebuconazole) provided the best control of brown rot, being comparable to the chemical standard Merivon (fluxapyroxad + pyraclostrobin).