Dithiopyr 2EW Pre Emergent Herbicide gallon (128 oz) non restricted Always read and follow the Always read and follow the complete product label before application Less competition for nutrients in the soil allows plants to develop healthier root systems with increased biomass Dithiopyr 2EW Herbicide is a professional grade pre emergent and early post emergent herbicide designed to deliver reliable control of crabgrass and more than 40 annual grasses and broadleaf weeds Dithiopyr 2EW controls crabgrass up to the tillering stage (≤5 leaves) and provides long lasting residual pre emergent control when applied prior to weed germination