Effect of phosphites on the content of total phenols and chlorogenic acid in peach-Monilinia fructicola pathosystem

Monilinia fructicola is a fungal pathogen responsible for fruit brown rot in many species of the Prunus genus. The use abiotic elicitors as phosphites being studied induction resistance an alternative to synthetic fungicides. aim this work was evaluate effect on content total phenols, chlorogenic acid and changes susceptibility M. peach fruits. Peach fruits cultivars Flordaking Elegant Lady were treated with potassium- calcium-phosphites, harvested at three development stages: green (GF), pit hardening (PH) harvest time (HT). After harvesting, half them inoculated conidia suspension under laboratory conditions. Total phenols assayed skin Results showed different behaviors according cultivar. In Flordaking, phosphite treatment allowed increase stages GF PH, but not acid. presence inoculum, decreased, phenols. did show differences after treatments. Both metabolites exhibited seasonal behavior.