Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

Question

Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide? (A) Bacterial leaf blight of rice (B) Downy mildew of grapes (C) Loose smut of wheat (D) Black rust of wheat

Tardigrade Admin · Accepted Answer

Bordeaux mixture was discovered by Millardet in France in

1882.

It is prepared by dissolving

40 g

of copper sulphate and

40 g

of calcium hydroxide in

5 L

of water. It was first used to control downy mildew disease of grape-vine that is caused by a fungus Plasmopara viticola. Black rust of wheat is caused by Puccinia graminis tritici. The use of fungicide Dithane

Z - 78

and Dithane

M - 45

control the disease even at lower concentration.
Loose smut of wheat is caused by Ustilago tritici. The use of fungicides (systemic fungicide like

D - 735

and

F - 461

) give quite encouraging result.

Q. Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

Bacterial leaf blight of rice

Downy mildew of grapes

Loose smut of wheat

Black rust of wheat