Are most efficacious on seedling crabgrass. Can cause some phytotoxicity to desirable turf grasses, especially in hot weather. Acclaim Extra, the new isomer of Acclaim, provides similar efficacy to Acclaim.
Dimension also provides early postemergence crabgrass control.
Methods Various herbicides and rates were evaluated for postemergence crabgrass control on an established stand of Kentucky bluegrass. All liquid applications were made with a CO 2 -pressurized sprayer at 88 gpa. 20.0 20.0 Acclaim Extra 0.57 EW 0.09 53.3 40.0 6.7 0.0 0.0 50.0 46.7 8. 5.99 7.34 6.57 4.61 4.63 8.31 10.80 7.16 4.79 a Crabgrass cover is reported as percent crabgrass per plot averaged over three replications. The Kentucky bluegrass stand was maintained at a mowing height of 0.75 inches until three weeks prior to herbicide treatment.