Organophosphates: Represented by glyphosate, these herbicides hold a significant share of the global herbicide market. They work by inhibiting EPSP synthase in plants, blocking amino acid synthesis and thus controlling weeds.
Phenoxycarboxylic acids: Such as 2,4-D, primarily used to control broadleaf weeds. Their mechanism of action mimics plant growth hormones, causing weeds to grow abnormally and eventually die.
Triazines: For example, atrazine kills weeds by interfering with photosynthesis. However, they have a long half-life and tend to remain in the soil, causing some environmental impact.
Sulfonylureas: Such as nicosulfuron, these are ultra-high-efficiency herbicides, requiring very low dosages per acre. However, long-term use can lead to herbicide resistance in weeds, so caution is advised.
