To make trees look healthy and grow more efficiently, spray leaves lightly with water, then wipe with a paper towel. Any branches that exhibit these symptoms should be removed. Cut 12 inches below the diseased area close to the last healthy bud. Disinfect the pruning tool between cuts to stop the spread of disease. Prune all trees as needed to ensure sufficient air and circulation and sunlight.
Winter is the optimum time for pruning most trees.
Thus, it's good practice to always remove one of two identical branches. Have larger trees pruned by a professional due to ensure safety. Be sure to keep trees away from utility lines.