DFI/2021-0171: Environmental Information Regulations 2004 request for information about annual costs to the Department for Infrastructure of controlling five named injurious weed species, specified by the 1959 Weeds Act (Ragwort [Jacobaea vulgaris], Broad-leaved Dock [Rumex obtusifolius], Curled Dock [Rumex crispus], Creeping/Field Thistle [Cirsium arvense], & Spear Thistle [Cirsium vulgare}).