[Objectives]  To explore the ecological effects of the exogenous application of semiochemicals on Empoasca vitis and its main natural enemies. [Methods]  We investigated the effects of three semiochemicals on E. vitis and predatory spiders. We soaked lures in either salicylic acid (SA), methyl salicylate (MeSA), linalool, antioxidant, and a UV resistant agent, and hung them in the field. Lures soaked in n-hexane served as a control. After 1, 3, 7 and 14 d, we investigated the number of E. vitis and predatory spiders within 1, 2 and 3 m of the center of each lure. [Results]  Numbers of E. vitis decreased under all 3 treatments. SA had the most significant repellent effect followed by MeSA. There was a significant decline in the number of E. vitis after 7 d. Spider numbers increased under all treatments but MeSA attracted significantly more spiders than the other treatments. The maximum number of spiders was recorded after 3 days. There was no significant trend in the abundance of E. vitis or its natural enemies with distance from the center of each lure. [Conclusion]  SA and MeSA can both reduce the abundance of E. vitis, and attract spiders, in tea plantations. These results provide a basis for further research on the control of E. vitis, and attracting its main natural enemies, in tea plantations.