Isolation and Activity Identification of Volatiles Among Tea plant-Green Leafhopper-Evarcha spider

The volatiles emitted from the various treated tea shoots were entrapped by Tenax TA and identified by GC/MS. Meanwhile, the bioassay on tea shoots volatiles and their single components to the predatory spider of Empoasca vitis --Evarcha albaria was conducted. Investigation indicated that the attractive rate of predatory spider E. albaria toward the volatiles from normal tea shoots and mechanically damaged tea shoots was significantly weaker than that from the E. vitis damaged tea shoots. Among the tested components from various volatiles of treated tea shoots, the 2,6-dimethyl-3,7-octadiene-2,6-diol and indole are the specific compounds formed after the damaging of E. vitis. These two compounds showed a significant attractive activity to the predatory spider and regarded as the active compound in attracting the E. albaria predatory spider.