Scoring, ringing, root pruning may be helpful in controlling vegetative growth in these types of plantings. A second important reason for controlling growth is related to crop loss. This process is done when new growth is approximately 4 to 6 inches in length, usually about 10 days after petal fall. More than one time around the tree provides no additional benefit. Scoring later in the season reduces the effectiveness, and likely will provide no benefit if done after June drop.
Caution is advised when selecting trees to score.
Weak or moderately vigorous trees may be overly devigorated by the scoring treatment, and this effect may last for several years. On vigorous trees, scoring may be performed in successive years, but careful assessment of the previous season's growth should be made each year prior to treatment. Scoring breaks the flow of nutrients, photosynthates, and growth regulators between the tree canopy and its roots. The score will heal, but prior to healing it will reduce both the length and diameter of the new growth. Additionally, it will enhance fruit set and increase flower bud formation for the next season.