Halosulfuron-methyl
Halosulfuron-methyl is a sulfonylurea post-emergence herbicide used to control some annual and perennial broad-leaved weeds and sedges in a range of crops, established landscape woody ornamentals and turfgrass. It is marketed under several tradenames including Sedgehammer and Sandea.
Halosulfuron-methyl's HRAC classification is Group B, Group 2, as it inhibits acetohydroxyacid synthase.Effects
Halosulfuron-methyl is systemic and selective, and acts as an inhibitor of acetohydroxyacid synthase restricting the biosynthesis of the essential amino acids, valine and isoleucine, thus restricting plant growth. Symptoms take several weeks to develop and include general stunting, chlorosis, and necrosis of the growing points. It typically does not affect other major annual and perennial weed grasses and broadleaves such as spurge, dandelions, lambsquarters, and oxalis.