Title: Productivity of pruned and un-pruned 'Triple Crown' blackberry plants on the rotating cross-arm trellis system Authors
Submitted to: HortScience
Publication Type: Abstract Only
Publication Acceptance Date: April 20, 2014
Publication Date: April 23, 2014
Citation: Takeda, F., Rose, A.K. 2014. Productivity of pruned and un-pruned 'Triple Crown' blackberry plants on the rotating cross-arm trellis system. HortScience. Paper No. 20123. Technical Abstract: In 2012 and 2013, mature ‘Triple Crown’ blackberry plants were trained on the rotating cross-arm (RCA) trellis. By the end of the summer, as many as 30 lateral canes with lengths greater than 3.5 m had developed on three primocanes that had been bent at a 0.50-m height. In winter, the lateral canes were pruned back to 1.5 m lengths or left un-pruned to determine the effect of lateral cane length on budbreak, fruit cluster number, fruit number per cluster, fruit weight, and yield. On a plant basis, pruned and un-pruned plants possessed 36 and 54 m of cane length, 706 and 932 nodes, respectively. Pruned lateral canes had node numbers that were only 60 percent of un-pruned lateral canes, but 68 percent of buds developed a flowering shoot compared to only 32 percent of nodes on un-pruned laterals. Shortening the lateral canes to 1.5 m did not result in reduction of plant yield, fruit number, or fruit weight. The results indicated that pruning lateral canes to 1.5 m length was advantageous for blackberries trained on the RCA trellis.