Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
Loose smut of wheat
Black rust of wheat
Bacterial leaf blight of rice
Downy mildew of grapes
Bordeaux mixture is the first inorganic fungicide which was developed by RMA Millardet (1882) against downy mildew (Plasmopara viticola) of grape-vine at the University of Bordeaux. It consists of Copper (II) Sulphate slaked lime and water. Hence, the correct answer is option 4.