Bayer Advanced 704115 Crabgrass Killer for Lawns Ready-To-Spray, 32-Ounce This product kills crabgrass and other listed grass weeds  to the root Will not harm your lawn when used as directed Formula is ideal if you have crabgrass invading your lawn or if you missed your pre-emergent crabgrass control application The convenient sprayer connects to a garden hose and automatically dispenses the crabgrass killer One bottle treats 5,000 square feet