Correct pruning keeps fruit trees healthy. Trees with few overlapping or competing limbs have a better chance of a long fruitful life. In young and mature trees, allowing more sunlight and air to penetrate the canopy aids tree health and fruit production. Older and veteran trees can be kept in balance, or even rebalanced to prevent them from falling. However, the very act of pruning is causing a wound to the tree. Using the right pruning technique, a tree will seal the wound using its own mechanisms and little harm will come to the tree.