Mode of Action
2,4-D is a synthetic auxin, which is a class of plant hormones. It is absorbed through the leaves and is translocated to the meristems of the plant. Uncontrolled, unsustainable growth ensues, causing stem curl-over, leaf withering, and eventual plant death. 2,4-D is typically applied as an amine salt, but more potent ester versions exist as well.
Read more about this topic: 2,4-Dichlorophenoxyacetic Acid
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—Thomas Henry Huxley (1825–95)
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