Question

Which of the following when dissolved in water make (s) Bordeaux mixture?

• A. Copper sulphate
• B. Calcium oxide
• C. Both [a] and [b]
• D. None of the above

Answer 1

Answer: (B)

Bordeaux mixture was discovered by Millardet in France in $1882$. Bordeaux mixture is prepared by dissolving $40g$ of copper sulphate and $40g$ of calcium hydroxide in $5L$ of water. Bordeaux mixture is used primarily as a fungicide. It was first used to control downy mildew disease of grape-wine caused : fungus, Plasmopara viticola. The first pesticide to be used commercially was Bordeaux mixture.