Time to Switch Crabgrass Control Strategies – Turfgrass Science at Purdue University

Time to Switch Crabgrass Control Strategies

Crabgrass is starting to germinate throughout much of the state and thus preemergence herbicides will be of limited effectiveness. Instead, combinations of preemergence plus postemergence herbicides will be most effective for the next month or so. The postemergence herbicide will control that already germinated while the preemergence herbicide will prevent future emergence (crabgrass will emerge as late as early July). MSMA (variety of brandnames), fenoxaprop (Acclaim), or quinclorac (Drive) should be tank-mixed with a preemergence herbicide, whereas dithiopyr (Dimension) can be used by itself.

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