Tomato leaf miner Liriomyza bryoniae Kltb. found in glasshouses in the area of Lazarevac was investigated. Morphological characteristics, development host plants and harmful effects caused to selected vegetables were studied. The leaf miner infestation had caused deterioration of local cucumber crops causing and average 4.64 injury category, and an average 95.67% damage to the assimilation surface. Tomato was also affected, but the injury was in considerably lower degree (level 4.0), and some injury was found on pepper (level 2.0). The miner was merely recorded to be present in garden bean (injury level 0-1). Attention is drawn to the need for timely insecticide treatments, as well as compounds that could be used to control L. bryoniae.