Bordeaux mixture

Bordeaux mixture is a combination of copper sulphate and hydrated lime, invented in the vineyards of the Bordeaux region of France and known locally as Bouillie Bordelaise. It used mainly to control garden, vineyard, nursery and farm infestations of fungus, most notably vine fungus. This fungicide has been used for over a century and is still used, although the copper can leach out and pollute streams.