Evaluation of Strategies for Pruning and Crop Control of Concord Grapevines in Southwest Michigan

摘要

Seven strategies for pruning and adjusting the crop level of Concord vines were evaluated over a six-year period in a commercial vineyard in southwest Michigan to determine their long-term influence on vine productivity, vine structure, and fruit quality. Manual balance pruning retained 44 nodes per kilogram of cane prunings. Commercial manual pruning resulted in 25/100 more live nodes per vine and a 19/100 larger yield than manual balance pruning. Commercial manual pruning resulted in more clusters per meter of canopy but less yield per node, smaller clusters, and lower Brix than vines managed with manual balance pruning.