Figure 5. Average reduction (%) in pruning weights of Cabernet Sauvignon/SO4, grown with under trellis cover crops or herbicide treated vine row, Yadkin Valley, North Carolina, 2005 to 2015, exclusive of 2011 and 2012.
Greatest reductions in pruning weights were acheived with KY-31 and Elite II fescues.

Source: Gill Giese, Arkansas State University