Question

Which of the following growth hormones can be used for the eradication of weeds?

Options

• IAA

• IBA

• 2, 4-D

• Cytokinin

Answer 1

2, 4-D

Explanation:

2, 4-D is a synthetic auxin extensively used as a selective herbicide (weedicide) in agriculture. It is highly effective at eradicating broad-leaved dicotyledonous weeds while completely sparing mature monocotyledonous crops like wheat, rice, and lawn grasses. It works by mimicking natural auxins to trigger rapid, uncontrolled, and distorted growth in the target weeds, quickly exhausting their resources and leading to their death.