QuestionsHow to growFruitApplesApplie Trees 0 Vote Up Vote Down Marie Muprhy asked 17 years ago Gerry – I have 3 apple trees growning on a south facing wall. They are 4 years old. This year, for the 1st time, the leaves at the very end of some braches are looking witherd and have a greyish colour. What should I do. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago They have apple mildew. Prune out the affected twigs and spray with Roseclear 3 or similar.