Question

2,4-D does not affect

• A. mature monocotyledons
• B. mature dicotyledons
• C. both (a) and (b)
• D. none of these

Answer 1

Answer: (A)

$NAA$ (Naphthalene acetic acid) and $2,4-D(2,4$-dichlorophenoxyacetic acid) are synthetic auxins. All these auxins have been used extensively in agricultural and horticultural practices. They are widely used as herbicides. $2,4-D$ is widely used to kill dicotyledonous weeds, it does not affect mature monocotyledonous plants. It is used to prepare weed-free lawns by gardeners.