Which group of herbicides includes 2,4-D and dicamba?

The group of herbicides that includes 2,4-D and dicamba is known as synthetic auxins. These herbicides function by mimicking the natural plant hormone auxin, which regulates growth processes in plants. When synthetic auxins are applied, they disrupt normal plant growth patterns, leading to abnormal growth responses that can inhibit or halt the development of weeds.

2,4-D and dicamba specifically target broadleaf weeds and are commonly used in agricultural and non-agricultural settings. Their effectiveness in controlling these types of weeds stems from their ability to override natural developmental pathways, resulting in cells breaking down and the plant eventually dying.

The other groups mentioned—amino acid derivatives, photosystem II inhibitors, and lipid synthesis inhibitors—do not encompass 2,4-D and dicamba. Amino acid derivatives are associated with different modes of action, while photosystem II inhibitors work by interrupting photosynthesis. Lipid synthesis inhibitors target the lipid biosynthesis pathways in plants. Thus, identifying synthetic auxins as the correct group is crucial for understanding how these herbicides operate and their specific role within weed management strategies.