What is the composition of Bordeaux mixture?
A. 10lb Copper sulphate + 5lb lime + 100 gallon water
B. 5lb Copper sulphate + 5lb lime + 100 gallon water
C. 5lb Copper sulphate + 5lb lime + 50 gallon water
D. 10lb Copper sulphate + 10lb lime + 100 gallon water
Answer: Option C
Solution(By Examveda Team)
The composition of Bordeaux mixture is 5lb Copper sulphate + 5lb lime + 50 gallon water.Bordeaux mixture is a mixture of copper (II) sulphate (CuSO4) and quicklime (CaO) used as a fungicide. It was invented in the Bordeaux region of France in the late 19th century, hence named after that.
Bordeaux mixture achieves its effect using the copper ions (Cu2+) of the mixture. These ions affect enzymes in the fungal spores in such a way as to prevent germination.
It is sprayed on plants as a preventive treatment; its mode of action is ineffective after a fungus has become established.
Related Questions on Plant Pathology
Which photosynthetic bacteria possess both PS I and PS II?
A. Purple sulphur bacteria
B. Cyanobacteria
C. Purple nonsulphur bacteria
D. Green sulphur bacteria
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