Tribenuron-methyl
Type: Herbicide
Mode of Action: Inhibiting the enzyme acetolactate synthase (ALS)
Common Product Names: Express, Harmony, Ally
What is it?
Tribenuron-methyl is a selective herbicide used primarily in cereal crops such as wheat and barley. It belongs to the sulfonylurea class of herbicides and is known for its effectiveness at low application rates. This active ingredient is absorbed by the foliage and roots of weeds, providing both pre-emergence burndown and post-emergence control of a wide range of broadleaf weeds.
How does it work?
Upon application, tribenuron-methyl is absorbed by the leaves and roots of target weeds. Once inside the plant, it travels to the meristematic regions, where cell division and growth occur. By inhibiting the ALS enzyme, it disrupts the plant's ability to produce essential amino acids, leading to cessation of growth, chlorosis (yellowing of leaves), and ultimately plant death. The herbicide's selectivity allows it to target specific weed species without harming the desired cereal crops.