When loading or applying wear goggles, long sleeves and long pants. Pyramite 0.6 WSB 4.4 ozs. Borers tunnel inside vines or below ground level, weakening or killing them. There are two control options. Mounding provides cultural control.
Lorsban treatment provides chemical control.
Neither control system is without flaw. Mounding uses layers of soil to make it more difficult for young larvae to reach the roots or adults to emerge. Look at 100 vines in each vineyard block. If possible treat before adult borers emerge, at least 35 days before harvest. Apply 2 qts.