If your herbicide keeps causing callbacks, you should switch and treat your customers' trees and shrubs with the longest residual on the market in Sureguard Herbicide. Use Sureguard Herbicide to provide outstanding weed free trees and shrubs in your customers' ornamental beds. It won't stain, and it provides excellent, long-lasting preemergence control of tough annual broadleaf and grassy weeds such as spurge, bittercress, oxalis, common groundsel and crabgrass. Sureguard also enhances knockdown performance of glyphosate when used as a tank mix partner, even on glyphosate-resistant weeds.