Glyphosate (N-phosphonomethyl glycine, C 3 H 8 NO 5 P CAS 1071-83-6) is a herbicide is not selective, broad spectrum, developed for elimination of herbs and shrubs, especially perennials. Es un herbicida total. It is a total herbicide. Es absorbido por las hojas y no por las raíces . It is absorbed by leaves and not the roots.

Glyphosate is an aminophosphonic analogue of the natural amino acid glycine and the name is a contraction of glycine, phospho-, and -ate. The molecule has several dissociable hydrogens, especially the first hydrogen of the phosphate group.

Paraquat is the trade name for N,N′-dimethyl-4,4′-bipyridinium dichloride, one of the most widely used herbicides in the world. Paraquat, a viologen, is quick-acting and non-selective, killing green plant tissue on contact. It is also toxic to human beings when swallowed.