Hi, I look after a garden which is well established but for some reason a number of the plants have some kind of disease this year where the leaves are curling and dyeing off. It has affected various plants from Magnolia's Forsythia, Hazel, Spirea, as well as Vines and Wisteria.
When you open the leaf there is no obvious signs of aphids eating the leaves.
Please can you help us? I have a number of slides that show this problem.
Thanking you in advance
Keith

• 3 Aug, 2015