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      Question

      Which plant growth regulator is used to reduce

      pre-harvest fruit drop in grapes?
      A Chlormequat chloride Correct Answer Incorrect Answer
      B Gibberellic acid Correct Answer Incorrect Answer
      C Hydrogen cyanide Correct Answer Incorrect Answer
      D Naphthalene acetic acid Correct Answer Incorrect Answer
      E Maleic hydrazide Correct Answer Incorrect Answer

      Solution

      The traditional material used to help prevent pre-harvest drop in grapes is NAA (Fruitone N), a synthetic auxin.

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