QuestionsHow to growGreenhouse GrowingPeaches, Nectarines and Apricotspeach leaf curl 0 Vote Up Vote Down Caroline Tindal asked 11 years ago What do we use for outdoor peach trees to prevent peach leaf curl now that liquid copper is not available? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago Bordeaux mixture is still available and contains copper sulphate.