In agreement with other herbicides of sulfonyl urea group, the primary target site of action is the enzyme acetohydroxyacid synthase (AHAS). Both the actives are phloem-xylem mobile in the target weed both via the foliage and via the soil, with clear predominance of foliar action. The visible symptoms of herbicide action are
arrested growth within first few days after application and the appearance of chlorotic patches, followed by slow shoot necrosis. Susceptible plants stop
growth almost immediately after post-emergence application. Plants will be completely killed in 4 to 6 weeks after application.
Herbicide Resistance Action Committee (HRAC) Classification Group B (both a.i.)