The plant hormone used to destroy weeds in a field is :

1. IAA

2. NAA

3. 2, 4-D

4. IBA

Doubtly Asked 30 Oct 2026 NEET UG 2021 Practice test neet Save WhatsApp Report

1 answer

Best answer

Answer: 3. 2, 4-D

2,4-D is a synthetic auxin that kills dicot weeds without harming monocot crops such as wheat and maize.

IAA, NAA and IBA are auxins used mainly to promote rooting, fruit set and growth, not as weedicides.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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