Silver leaf disease on cherry
Silver leaf disease is a major killer of plum trees and cherries, including flowering cherries. The fungus gets in through wounds during the cool, wet part of the year and gradually kills the tree by blocking its water-carrying vessels, and the tree wilts. Usually a single branch is first affected and dies. The disease spreads until the whole tree dies.
Never prune these trees in winter. Prune away any sick-looking, or silvered branches in summer, and immediately seal all pruning cuts or injuries.