Chen FP et al. (2012) presented the first baseline sensitivity of fungi, causing brown rot of stone fruits, M. fructicola collected from China to a DMI fungicide.
Sterol 14α-demethylase inhibitors (DMIs) continue to be important in the management of brown rot of Monilinia spp. worldwide. In this study, the sensitivity of 100 Monilinia fructicola isolates from four unsprayed orchards and two packinghouses in Beijing, China, to the new DMI fungicide was evaluated.
Laboratory mutants resistant to SYP-Z048 were generated using UV irradiation but no mutants occurred spontaneously. Resistance was stable after 10 weekly consecutive transfers on fungicide-free medium. The inability of M. fructicola to generate spontaneous DMI-resistant mutants coupled with reduced fitness of Y136F mutants can explain why this target site mutation has not yet emerged as a DMI fungicide resistance determinant in M. fructicola field populations worldwide.
Chen FP et al. (2012) Baseline Sensitivity of Monilinia fructicola from China to the DMI Fungicide SYP-Z048 and Analysis of DMI-Resistant Mutants.- Plant Disease, Volume 96, Issue 3, Page 416-422, March 2012. http://dx.doi.org/10.1094/PDIS-06-11-0495