pesticides are widely used agricultural inputs, and they are esters of the phosphoric acid and
the derivates thereof, and they share in common as a pharmacological characteristic, the action
of inhibiting enzymes having esteracic activities, and more specifically, the inhibition of the
acetylcholinesterase. They are easily hydrolyze and they have a low capacity of remaining in
the environment (Palacios and Moreno, 2004), (Chakraborty, 2009), (Ntow et al, 2009).
Other pesticides under study are the organochlorated, which are persistent, lypophilic and