date:Jun 03, 2016
sin grapes are generally manually pruned.
Table grapes, even spur-pruned varieties, are also mostly hand-pruned, though I have recently seen a table grape vineyard being pre-pruned by machine. If this method proves successful, other table grape growers are likely to adopt it.
Machine-pruned vines are prone to overcropping since they typically retain more nodes than hand-pruned vines. Thats why its common to use a machine to pre-prune wine grapes, and a labor crew to finish the job.
A less lab