To help reduce infection and increase the plant's resistance, keep plants healthy. Plant the trees in the right location. Then follow good cultural practices during planting, maintenance and pruning of these trees. Effective fungicidal control must be started before there is any major dieback. Prune out and destroy infected branches. Removing and destroying infected leaves may have a limited benefit. Removing the water sprouts helps to reduce trunk cankers. Use recommended fungicides according to directions.