Remove tree limbs by first identifying those that require removal. For a large limb, begin near the leaf end and remove it in several sections. For smaller limbs, make an initial cut about halfway through the underside of the branch, about 18 inches from the trunk and a second cut from the top a few inches out from the first. After removing the excess weight, cut the limb at the final point.
Cutting tree limbs often requires working from a ladder. Set the ladder so at an angle that you can reach the shoulder-height rung with your arms held straight out and feet at the base.
Use a pruning saw to trim limbs less than 4 inches in diameter. For larger limbs, use a chainsaw. After trimming the tree, clean and disinfect the saw blade, using a solution of bleach in water or rubbing alcohol to prevent spreading disease to the next tree you trim. Allow the blade to soak a few minutes in the solution to kill any diseases.
If you make the cut properly, outside the limb collar, there is no need for wound dressing. In most cases, it does more harm than good. Trimming when the tree is in the dormant season ensures time for wounds to heal naturally.