Abstract
Vitis labrusca «Concord» vineyards with hand-pruned umbrella Kniffin trained vines, hand-pruned top-wire cordon trained vines, or hedged top-wire cordon trained vines were examined for incidence and severity of Phomopsis cane and leaf spot, caused by Phomopsis viticola. These vineyards were also evaluated for the development of pycnidia of P. viticola before budbreak. Vines that were hedged for 2 yr or more had significantly more disease than hand-pruned vines
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