Every year we have an abundance of grapevines and every year they are attacked, leaves go brown, curl up and die? Maybe mildew? My french neighbour suggested spraying with sulphur! Anyone know what to buy and when to use?
Vines do suffer from mildew, but brown leaves sounds like oïdium. You can buy chemicals to counteract this from garden centers etc.
Tony
Please note that any unsolicited advertising will be removed