Triclopyr is a chloropyridinyl compound herbicide used against woody and herbaceous weeds. Most triclopyr is sold as a triethylamine salt (abbreviated TEA) or butoxyethyl ester (abbreviated BEE) derivative of the parent chemical, triclopyr acid. Triclopyr TEA was registered with the EPA in 1979 and triclopyr BEE was registered in 1980 (#EPA). Both chemicals are used for weed control in forests, pastures, and on other grasses including home lawns.Triclopyr is sold under names such as Access, Crossbow, ET, Garlon, Grazon, PathFinder, Redeem, Rely, Remedy, and Turflon. It is often mixed other herbicides like picloram or 2,4-D to target a greater range of plant pests Triclopyr controls target weeds by mimicking the plant hormone auxin, causing uncontrolled plant growth. Low concentrations of triclopyr can stimulate RNA, DNA, and protein synthesis leading to uncontrolled cell division and growth, and, ultimately, vascular tissue destruction. Conversely, high concentrations of triclopyr can inhibit cell division and growth.