An undesirable sensory attribute (“floral taint”) has been detected in red wines North America, caused by leaves and petioles (materials other than grapes [MOG]) introduced during mechanical harvest after killing frosts. From 2017 to 2019, several strategies were evaluated on Ontario Cabernet franc: hand (HH), conventional machine harvesting (MECH), Braud-New Holland Opti (OPTI), Gregoire GL8, ...