Squire Ultra from Interfarm controls docks and some annual broad leaved weeds in grassland. It contains 75% amidosulfuron in a water dispersible granule formulation. Controls both broad and curled leaf docks in rotational and permanent grassland. Doesn’t harm clover. Amidosulfuron, a sulphonylurea herbicide, is fully systemic and slower to act than traditional dock herbicides, moving throughout the weed, especially into the roots resulting in high levels of control