The only way to get on top of the broadleaf weeds in your lawn is to attack BOTH the pre-emergnet and post-emergent populations.
Prodiamine 65 WDG is a pre-emergent crabgrass control solution that contains 65% prodiamine active ingredient. Prodiamine is a generic form of Barricade. Prodiamine is just as effective on controling crabgrass and far less expensive. Prodiamine is an effective pre-emergent herbicide for pre-emergent crabgrass and broadleaf weed control. Prodiamine can be applied in the spring and fall for year-long crabgrass control. Prodiamine 65 also helps control bluegrass, spurge, witchgrass and others. It can be safely used on St. Augustine, Bermudagrass, Fescue and other common turf grasses (see label for complete list). Prodiamine 65 WDG is non-staining and can be mixed and applied with fertilizer and iron solutions. Contains a 5 lb. jug of Prodiamine.
Q4 Plus is a strong and effective post-emergentsolution for crabgrass and many other broadleaf weeds. Q4 Plus contains 0.75lbs./acre of quinclorac for enhanced control of grassy weeds such as crabgrass and foxtail. Quinclorac is absorbed by both the leaves and roots and translocated throughout the plant. The effects on grassy weeds include stunting, gradual reddening and yellowing followed by plant death. Q4 Plus also contains sulfentrazone, adding fast-acting yellow nutsedge control as a bonus. With precise ratios of 2,4-D and dicamba, is broadens the weed spectrum and adds systemic activity to the contact activity of sulfentrazone for multiple modes of action. Q4 plus can be used in both cool and warm season turf. For warm season turf, please refer to label for lower application rates.
Q4 plus is a strong concentrate containing 75% active ingredient of Quinclorac. Contains 1 quart of Q4 Plus which will treat aproximately 16,000 sq. ft.