Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide ?
A
Loose smut of wheat
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B
Black rust of wheat
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C
Bacterial leaf blight of rice
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D
Downy mildew of grapes
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Solution
The correct option is D Downy mildew of grapes The Bordeaux mixture fungicide (copper sulfate and lime), discovered accidentally in 1882, was used successfully against vine downy mildew; this compound is still employed to combat it and potato blight.