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    Question

    Black arm in Cotton is caused due to

    –
    A Fungus Correct Answer Incorrect Answer
    B Bacteria Correct Answer Incorrect Answer
    C Deficiency of Iron Correct Answer Incorrect Answer
    D Deficiency of Nitrogen Correct Answer Incorrect Answer
    E Protozoan Correct Answer Incorrect Answer

    Solution

    Bacterial blight:  Xanthomonas campestris p.v malvacearum caused black lesions on stem and branches, premature drooping off of the leaves resulting in die back known as Black arm.

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