Nominee is a post-emergent herbicide that will selectively control Winter Grass (Poa annua) and suppress Winter Grass seedheads in Bent Grass golf green situations.
Nominee is a Group B herbicide which works by inhibiting synthesis of the enzyme acetolactase (ALS), which plants require to produce amino acids essential for normal growth and development. Selectivity is achieved through differences in physiological responses to the herbicide by different species. Different species vary in how the herbicide is translocated through the plant and their ability to metabolise the herbicide. For example, creeping bent grass retains more of the herbicide in the leaves whereas Poa annua will translocate more of the herbicide to the crown (Lycan and Hart 2006). Additionally, creeping bentgrass, tall fescue and perennial ryegrass metabolise (breakdown) the herbicide significantly faster than Poa annua.