Khaki Weed (Alternanthera caracasana) is a perennial weed from tropical America that has invaded the southern U.S. at an alarming rate. Because it has a tremendous tap root, it is difficult to control in its mature stage. Repeated sprays and use of surfactant is necessary. Surfactants (spreader-stickers) break down the surface tension on the leaf and allows the herbicide to penetrate better and be more effective. The best control is to not let the plant go to seed. If it does go to seed, pre-emergent control can be effective. The [...]