Nico-T is a selective, systemic and post-emergence herbicide absorbed by foliage and root to control grass weeds in maize by inhibiting the plant enzyme acetolactate synthase, or ALS Enzyme. Nico-T blocks the production of the amino acids, valine and isoleucine , essential building blocks of proteins and other plant components. Nico-T is applied post-emergence with a non-ionic surfactant when weeds are 4-12 inches tall and actively growing. Rain within two hours of application will not decrease the effectiveness. Nicosulfuron is used for control of weeds such as Johnsongrass, quackgrass, foxtails, shattercane, panicums, barnyardgrass, sandbur, pigweed, morningglory and others. Crops include field corn and popcorn.