Paraquat (l,l'dimethyl, 4,4' bipyridyl) is a nor selective contact herbicide. It is produced in several countries including China, Province of Taiwan, Italy, Japan, the United Kingdom, and the USA, and it is used world-wide ...

2,4-D is a selective herbicide which kills broad-leaved plants but not grasses or conifers. Its chemical structure is a modification of a naturally occurring plant hormone. 2,4-D is available as the free acid but is ...