Abstract: In said procedure, following placement of the agricultural food product in a bag, the following stages are carried out: a) the CO2 and O2 are mixed, with the concentration of CO2 equal to or higher than 40% and the concentration of O2 equal to or lower than 5%; b) the bag is filled with the mixture resulting from stage (a) by teans of a scavenging operation or the creation of a vacuum inside the bag, setting up a pressure of 350 mbar inside the bag; c) the agricultural food product is exposed to the mixture of gases for a time that ranges between 4 and 26 days, the concentration of CO2 falling to 30% and the concentration of O2 rising to 9%; said procedure permitting the eradication of insects and/or mites at any stage of their development.