The 14C-glyphosate utilized is radiolabelled in the phosphonomethyl carbon, which is also present in the aminomethyl phosphoric acid (AMPA) molecule, that is the main metabolite of glyphosate. Thus, the detected amounts of 14CO2 were formed from the degradation of glyphosate to AMPA, as well as from degradation of AMPA and express really total degradation of the pesticide molecule.