The Spectracide Weed Stop For Lawns Concentrate 2 is designed to control more than 460 types of weeds, including dandelion, chickweed, clover, and yellow nutsedge. Here’s how to mix it for a sprayer: Dilutable Concentrate: Mix 5 fl oz of the concentrate with 1 gallon of water. Ready-to-Spray Concentrate: Attach the 32 fl oz bottle directly to your garden hose and spray until wet.