What Will Kill Crabgrass In Centipede? 

Q: What will kill crabgrass in centipede? 

A: It is tough to find products that can distinguish between your centipede grass and your crabgrass. Sulfentrazone plus quinclorac (Image Kills Crabgrass) is labeled for use in your situation. For best results, weeds should be small and the grass not under any stress from heat or drought. Mesotrione (Tenacity) is also effective but it is expensive and you must measure and apply it carefully. If you don’t, your centipede grass will turn white. As with any pesticide, read and follow the label exactly.