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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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