PRELIMINARY STUDY ON RESISTANCE OF DIFFERENT TEA VARIETIES TO SMALLER GREEN LEAFHOPPER Spatial relationships among Empoasca vitis (Gothe) and Toxoptera aurantii (Boyer) and natural enemies in tea gardens of autumn-winter season in Hefei suburban Genetic variation of Empoasca vitis (Göthe) (Hemiptera: Cicadellidae) among different geographical populations based on mtDNA CO I complete sequence