Barricade with Fertilizer 18-0-4 is The Andersons professional-grade, pre-emergent weed and feed. Containing 0.426% of the active ingredient prodiamine, Barricade is one of the best granular weed preventers on the market. It can be used on established lawns and landscape beds to prevent over 30 grass and broadleaf weeds like poa annua, crabgrass, goosegrass, foxtail, lambsquarter, henbit and more. Barricade with Fertilizer 18-0-4 features The Andersons patented Dispersible Granular (DG) Technology which allows each granule to disperse into thousands of micro particles after coming into contact with water. Because of DG Technology, Barricade can move past the thatch layer of your lawn and into the soil where it prevents the germination of weed seeds.