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Question
Potato leaf roll or leaf curl of papaya are caused by
Potato leaf roll or leaf curl of papaya are caused by
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Solution
The correct option is B Viruses
Potato leafroll disease is caused by potato leaf roll virus. It is a phloem limited positive sense RNA virus which infects potatoes and other members of the family Solanaceae. High levels of infection within a crop reduces tuber yield, size and marketability. Papaya leaf curl disease is caused by a papaya leaf curl virus. Papaya leaf curl virus is a DNA virus and causes severe disease in papaya but can also infect other crops such as tobacco or tomato. So, the correct answer is 'Viruses'.
Potato leafroll disease is caused by potato leaf roll virus. It is a phloem limited positive sense RNA virus which infects potatoes and other members of the family Solanaceae. High levels of infection within a crop reduces tuber yield, size and marketability. Papaya leaf curl disease is caused by a papaya leaf curl virus. Papaya leaf curl virus is a DNA virus and causes severe disease in papaya but can also infect other crops such as tobacco or tomato.
So, the correct answer is 'Viruses'.
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