Diuron 4L (diuron)Diuron 4L (diuron), EPA# 66222 54, READ THE LABEL Diuron provides pre emergence, residual control of many annual broadleaf weeds and grasses in established vineyards. Apply as a band treatment to established vineyards at least 3 years old. Do not apply more than 4 quarts per acre surface sprayed per application with a maximum of 2 applications per year. Consult the label for additional restrictions for use on soils low in clay or organic matter.