The lesser tea leafhopper, Empoasca vitis (Homoptera: Cicadellidae) is the mostserious tea tree pest, which has developed high resistance to almost all insecticides andneeds biological alternatives. In the present study, an isolate of Isaria javanicus from thelesser tea leafhopper, Empoasca vitis and4isolates of Beauveria bassiana from otherleafhoppers were tested for their extracellular protease. I. javanicus isolate and2Beauveriaisolates were screened out for bioassay to early instar nymphs of the leafhop...