The identification of European leafminer Scaptomyza flava Fallen is depending on the morphological characters of larvae, pupae and adults of insects which were collected from three plants of Brassicaceae,i.e., mustard, watercress and radish. The specimens were collected by different methods including sweeping nets, sticking traps and hand picking, during the period from 2015-2018 in months of December, January, February and March. The first appearance of insect was in December 2015 on radish plant, the specimens were studied and identified at laboratories of science college, Basrah University, Iraq using taxonomical key. The specimens were sent to Natural History Museum of Baghdad University to be confirmed