Prune out and destroy infected twigs and branches, since they provide a source of inoculum during the following spring. Apply fungicide before budbreak in spring. Thorough coverage is important. If rain occurs within 24 hours of application, reapply treatment. Fertilize and provide deep irrigation during summer.
Leaves turn brown around the edges, and sometimes between the veins.
Results from lack of water balance in the tree, or xylem plugging by bacterium. Brought on by hot, drying winds, drought, shallow soils, inadequate irrigation, etc. Deep, thorough irrigation of the root zone every 3 to 4 weeks. Rake and bury leaves during the fall. Fungicide sprays may offer some protection if applied early in spring at budbreak or at an early leaf stage.