Interestingly, the two products have different active ingredients. BioAdvanced crabgrass killer for lawns is Fenoxaprop-p-ethyl, while the other uses quinclorac. Fenoxaprop-p-ethyl is a post ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." The persistent weed known as crabgrass (Digitaria spp.) has a way of sneaking into almost every lawn.