Quality and safe food is an imperative in organic production. Recently, in EU market some organic fruits and vegetables were positive (>0.01 mg/kg) to phosphonic acid (i.e., phosphite), despite fosetyl-Al or phosphite are not allowed as plant protection products in Reg. EC n.889/2009. In 2016, the Italian Ministry of Agricolture funded the BIOFOSF project to the Council for Agricultural Research and Economics, which promoted a partecipatory approach among researchers, farmers and control bodies for solving this issue. The endogenous production of phophonic acid was not observed, while it was evidenced that its origin is due only to external inputs. A contamination of some plant protection products (PPP) and organic fertilizers allowed in organic farming was found, thus suggesting a deep revision of their official control system
