Abstract: Efficacies of yellow, green, blue, red, purple and pink sticky traps on catching Bemisia tabaci adults were compared in a tomato greenhouse. The yellow traps (YSTs) were found to be most effective, followed by the traps of green, blue, and red, purple or pink colors. Subsequently, the hanging heights and densities of YSTs were varied for further testing. The results showed that the height to hang a trap significantly affected the trapping efficacy. YSTs placed with top edges parallel to and 15 cm above or below the canopy of a tomato plant caught significantly more adult insects than those were hung 30 cm above or below the canopy. YSTs exerted a significant control on the size of B. tabaci adult population. The trap setting of 0.06, 0.09 and 0.12 units·m^-2 for 8 weeks resulted in trapping rates of 54.18%, 67.29% and 80.01%, respectively. Thus, YSTs was considered an effective tool for managing the B. tabaci population in greenhouses.