Which synthetic auxin is widely used as a weedicide to kill broad-leaved dicotyledonous weeds?
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Correct answer: 2,4-D (Dichlorophenoxyacetic acid)
2,4-Dichlorophenoxyacetic acid (2,4-D) is a synthetic auxin used to control dicotyledonous weeds in cereal crops. It does not affect mature monocotyledonous plants.
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