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    Question

    Which disease in Bengal Gram displays round or elongated

    lesions on leaflets with brown spots, surrounded by a brown margin, and pycnidia arranged in concentric circles on stems and pods?
    A Rust Correct Answer Incorrect Answer
    B Wilt Correct Answer Incorrect Answer
    C Blight Correct Answer Incorrect Answer
    D Root rot Correct Answer Incorrect Answer
    E Blight Correct Answer Incorrect Answer

    Solution

    Blight in Bengal Gram is caused by Ascochyta rabiei. Infected leaflets exhibit round or elongated lesions with depressed brown spots encircled by a brown margin. The stem and pods show spots with concentric circles of black pycnidia. Favorable conditions for this disease include high rainfall during flowering, temperatures of 20-25˚C, and a relative humidity of 60%.

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