Stub cut the branch. The best time to prune living branches is late in the dormant season or very early in spring before leaves form. Dead and dying branches can be pruned anytime. Make clean cuts. Be careful with all tools.
Trees respond effectively to their wounds without the aid of additional chemicals.
Do not interfere with this natural process. Keep your tree healthy and it will take care of its wounds. In a short time the wound surface will blend perfectly with the tree bark. Tree Treatments Tree Wounds. If trees are wounded, remove injured bark with a sharp knife.