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How to Calibrate and Use a Backpack Sprayer

  Rick Dunst, Viticulturist, Double A Vineyards, Inc.     Small vineyard owners often find that they need to spray chemicals for control of weeds, insects, and disease, but can’t justify the expense of a tractor-operated sprayer (not to mention the tractor). The need for chemical applications to control grapevine diseases can be minimized by …

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