【Background】 Bemisia tabaci is an important pest on solanaceous vegetables in greenhouses. 【Method】 The sex attractant, yellow sticky card and sex attractant+yellow sticky card were hung in pepper fields and cucumber fields for trapping the B.tabaci. 【Result】 Both sex attractant and yellow sticky cards had good trapping effects on B.tabaci. After hanging sex attractant and yellow sticky card in cucumber field for 4 hours, there were 13.80, 7.40 and 31.20 B.tabaci adults on sex attractant, yellow sticky cards and sex attractant+yellow sticky card, respectively. As the hanging times increased, the amount of the attracted B.tabaci gradually increased. After 24 hours, the numbers of adult B.tabaci were 32.20, 31.80 and 52.80 on sex attractant, yellow sticky cards and sex attractant+yellow sticky card, respectively. In the first 48 hours, there were significantly more B.tabaci on sex attractant than those on the yellow sticky card. However, after 48 hours, the yellow sticky card significantly attracted more B.tabaci than sex attractant. Results from B.tabaci adults on cucumbers showed that, after 24 hours, the sex ratio on the sex attractant and cucumber+yellow sticky card were respectively 4.05∶1 and 3.31∶1, while the sex ratio of the yellow sticky card was close to 1∶1. Both sex attractant and yellow sticky cards trapped the largest amount of B.tabaci between 10:00~14:00 in a day. Different hanging heights of sex attractant have different trapping effects on B.tabaci. In a pepper field, more B.tabaci were trapped when the lower end of the white sex attractant card was at the same level than the top of the leaves than at 10 cm or 50 cm higher than the top of the leaves. After 4 days of the trapping, the corrected control effects of sex attractant, yellow sticky card and sex attractant+yellow sticky card on B.tabaci were 68.18%, 60.42% and 77.40%, respectively. 【Conclusion and significance】 Sex attractant has a strong sex trapping effect on B.tabaci and the combination of yellow sticky card and sex attractant has obvious synergies in trapping B.tabaci.