The primary functions of pruning grapevines are to--
-Shape the vine and maintain this shape so cultural practices can be carried out economically (For example, cultivation, irrigation, disease and pest control, and harvesting)
-Regulate crop. Pruning is the cheapest way to reduce the number of clusters and prevent overbearing of the vine. Thinning is a more efficient way to regulate crop but too costly.
-Distribute the bearing wood over the vine and regulate the amount of bearing wood according to each individual vine's capacity. Proper pruning results in a good crop of quality fruit year after year.
-Shape the vine and maintain this shape so cultural practices can be carried out economically (For example, cultivation, irrigation, disease and pest control, and harvesting)
-Regulate crop. Pruning is the cheapest way to reduce the number of clusters and prevent overbearing of the vine. Thinning is a more efficient way to regulate crop but too costly.
-Distribute the bearing wood over the vine and regulate the amount of bearing wood according to each individual vine's capacity. Proper pruning results in a good crop of quality fruit year after year.
