Abstract

Weeds are found throughout the orchard or vineyard floor. They are controlled mostly in a band down the tree or vine row with cultivation, or more frequently with one or more applications of one or more herbicides. Instead of resident vegetation, planted cover crops of choice are being planted to “control” the vegetation. Two aspects of cover crops for weed control have been studied. First, the selective herbicides, sethoxydim, fluazifop, 2,4-D and combinations have been applied to selectively shift plant species within the vineyard to more desirable cover crops. Secondly, cover crops have been planted into prepared soil, grown for biomass, chopped and transferred as a mulch to the tree or vine row. A mixture of cultivated oat, purple and common vetch grown between the rows, chopped and blown into clean soil under trees or vines has effectively controlled annual weeds. The quantity of cover crop biomass produced is critical for adequate weed control.

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