Which of the following is a bacterial plant disease
A
Tikka disease of Groundnut
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B
Downy mildew of Grapes
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C
Ring rot of Potato
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D
Red rot of Sugarcane.
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Solution
The correct option is B Ring rot of Potato C. Ring rot of Potato
EXPLANATION: Ring rot of potato is caused by the bacterium Clavibacter michiganensis subsp. sependonicus. The primary symptoms of the plant disease are soft cheese-like rotting of the vascular ring and in severe cases, the skin of potato totally cracks. Tikka disease of groundnut is a fungal disease. Downy mildew of grapes is caused by Plasmopara viticola and it is a major disease of grapes. Red rot of sugarcane is caused by the fungus Colletotrichum falcatum. This disease is seen in Indian sub-continent.