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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 None of the above 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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