Last Call Selective Herbicide is a systemic herbicide which controls emerged grasses and broadleaf weeds at time of spraying. Young, actively growing grass weeds are more easily controlled than larger grass weeds. Use 44 to 88 gallons of finished spray solution per acre for thorough coverage. For application rates, refer to the Application Rate chart below. Avoid applications to turfgrass under stress due to lack of moisture, chemical injury or temperature extremes. For adequate control, treat annual grass weeds between the 1 leaf to 4 tiller stage of growth.