Dallisgrass is a type of grassy weed that keeps coming back each year because it is a perennial. It has a light green color and grows upright in a clump-like manner. To get rid of it, you can use two applications of selective herbs, and you can also use Tenacity turf herbicide, Sulfonylurea herbicide, and Quinclorac. If you decide to remove it by hand, make sure to get rid of its roots as well.