Abstract: A greenhouse experiment was carried out to evaluate the insects trapping efficiency of various colored traps in cucumber (Cucumis sativus L.) crop in Riyadh, Saudi Arabia. The treatments involved were seven different sticky traps (green, fluorescent yellow, orange, pink, red, yellow and transparent (control)) placed at four different heights (0.5, 1.0, 1.5 and 2.0 m above the ground) and each treatment was replicated four times. The experiment was laid out in "Complete Randomized Block Design". The insect pests recorded were Thrips Thrips tabaci (Lindeman) and the leafminer Liriomyze trifolii (Burgess). Significantly more insect pests were trapped on fluorescent yellow as compared to other traps whereas pink, green and orange colored traps caught significantly lower number of insects and found statistically similar. However, there was no significant difference between mean number of various insects caught on sticky traps placed at different heights from ground level but more insects were trapped at maximum height (2 m).