Abstract: The best method to trap Bemisia tabaci adults using yellow card and the control effect of yellow card's (trap on) the B. tabaci population in the cucumber field were studied, the results showed that B. tabaci has strong taxis to the yellow card. When the yellow card to trap the adults of Bemisia tabaci was used on cucumber, the best method is to hang the yellow card vertically between the rows of the cucumber plants, and the height of yellow card is almost kept the same as the top of the cucumber plant. The yellow card can also trap other insects in the cucumber field such as springtails, cucumber aphids, cucumber thrips, etc. Life tables constructed by the affecting factors in the control area and yellow card-used area have been established. In control area, the B. tabaci population trend index (I-value) is 8.63, while in the yellow card-used area, its I-value is only 3.519 8; The interference index of population control (IIPC) of yellow card's trap and kill reaches 0.407 9. The exclusive index of population control (EIPC) in yellow card-used area is 6.791 7, while in the control area, the EIPC is 6.161 7.