What type of substances are 2,4-D and dicamba classified as?

2,4-D and dicamba are classified as synthetic auxins. These substances are herbicides that mimic the action of natural plant hormones known as auxins, which are crucial for plant growth and development. By imitating these hormones, synthetic auxins like 2,4-D and dicamba disrupt normal plant growth processes, leading to uncontrolled growth and, ultimately, the death of target plants, particularly broadleaf weeds.

Understanding the behavior of synthetic auxins helps in utilizing these herbicides effectively within cultural practices, ensuring that they control unwanted plant species while minimizing harm to desirable crops. This classification is crucial for applicators to select the right herbicides for specific weed management needs and to predict the potential environmental impact of their use.