THE DIFFERENCES BETWEEN PROBING BEHAVIOUR OF TEA APHIDS ON DIFFERENT PARTS OF TEATREE Behavior response of four Leis axyridis varieties to volatiles from tea and Toxoptera aurantii Spatial relationships among Empoasca vitis (Gothe) and Toxoptera aurantii (Boyer) and natural enemies in tea gardens of autumn-winter season in Hefei suburban Attraction effect of main volatile components from tea shoots and flowers on Sphaerophoria menthastri(Diptera:Syrphidae) and Chrysopa septempunctata(Neuroptera:Chrysopidae)