The fate of imidacloprid was investigated intomato plants during 75 days in soil contaminated by14C-imidacloprid. Leaves and fruits were separately ana-lysed for total radioactivity and metabolites. Almost 85%of plant radioactivity was translocated to shoots. Radio-activity concentrations decreased from bottom leaves to topleaves. Desnitro-imidacloprid was the main metabolitein leaves. Nevertheless, more than 50% of the leaveradioactivity corresponded to imidacloprid. Residue con-centrations were similar in all fruits (62.9 ng g–1),irrespective of their position on plant. In fruits more than85% of the radioactivity was due to imidacloprid. Thesmall fraction of residues translocated to fruits dependedon the low xylem flow in fruits.