Cover crops can serve as a useful tool of an integrated weed management program. Our research has shown that cover crops such as cereal rye can provide good control of winter annual weeds and other troublesome species like horseweed, and also provide early-season suppression of summer annual weeds like waterhemp. However, proper spring termination of cover crops is important in order to be able to plant your cash crop successfully, and also to prevent any of the surviving cover crop from competing with the cash crop.