Abstract
Mature vines of head-trained, cane-pruned Cabernet Sauvignon in a trial located near Oakville, California, were converted in 1979 to bilateral cordon training using three methods. The purposes were to study conversion techniques and to compare the productivity of cane <i>vs.</i> spur pruning. Observations were made for four years on crop yield, cluster numbers, fruit composition, berry, prunings and cluster weights, and numbers of shoots and flower clusters (one year). In 1983, an experiment was conducted to evaluate the overall quality of wines made from cane- <i>vs.</i> spur-pruned vines grown on three rootstocks (St. George, AxR1 and 110R). The conversion to bilateral cordon training was best effected by using previous year canes. The productivity from cane- or spur-pruned vines was similar, and fruit composition was not consistently different. Overall quality scores of wines from the 1983 trial were not significantly different as a result of either rootstock or method of pruning.
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