[Risks due to chemical agents in agriculture].

After a few notices about the contribution that chemistry has given for the development of the agriculture in this last century, we give a short description, with a classification supposition, of the main chemical agents used in the agricultural field, for the development and the defence of animal productions and crop-farming. Then, we present national statistical information about the use of chemical means of agrarian interest. We give also a short description of risks caused by chemical agents in agricolture (with hygienic implications concerning consumers also) prefiguring, in conclusion, some hypoteses for the substitution of the chemical mean with alternative techniques and methods.