............. is a bacterial plant disease

Tikka disease of groundnut

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Downy mildew of grapes

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Ring rot of potato

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Red rot of sugarcane

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Solution

The correct option is C Ring rot of potato
Ring rot of potato is caused by bacterium Clavibacter michiganensis. The red root of sugarcane is caused by fungi Colletotrichum falcatum. Tikka disease of groundnut by Cercospora arachidicola and Downy mildew of grapes is caused by fungi Plasmopara viticola. So, the correct answer is option C.

Suggest Corrections

List-I	List-II
a. Angular leaf spot of cotton	$1$ . Phytophora infestans
b. Late blight of potato	$2$ . Colletotrichum falcatum
c. Red rot of sugarcane	$3$ . Cercospora personata
d. Tikka leaf spot of groundnut	$4$ . Xanthomonas malvacearum