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      Question

      The key symptom of Cotton Wilt (Fusarium oxysporum)

      includes:
      A Leaf curling Correct Answer Incorrect Answer
      B Yellowing of tissues Correct Answer Incorrect Answer
      C Vascular discoloration and hyphal plugging Correct Answer Incorrect Answer
      D Root galls Correct Answer Incorrect Answer
      E Leaf mosaic Correct Answer Incorrect Answer

      Solution

      Fusarium oxysporum obstructs xylem vessels, causing tissue discoloration and wilting. Yellowing is a secondary symptom, while root galls are typical of nematode infections.

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