Abstract: Investigations on the egg parasitoids of tea leafhopper, Empoasca vitis (Göthe), were conducted both at tea plantations and in laboratory of Fujian Agriculture & Forestry University, Fuzhou. Two dominant egg parasitoids, Stethynium empoasca Subba Rao and Schizophragma parvulas Ogloblin, in Mymaridae have been found in Fujian tea plantations. Studies on the biology showed that the adult activity, longevity and oviposition of the two mymarids were significantly affected by temperature and light. These two mymarids can reproduce in both ways of amphigony and arrhenotoky. Under 25℃ condition, the lifecycle from egg to adult emergence lasted for about 21.40±0.26 days. After 10% honey water solution was supplied as supplementary nutrition, the female longevity could be proplonged significantly. The average reproductive capacity in Schizophragma parvulas (about 36.83±0.81 eggs per female) was much more than which in Stethynium empoasca (about 22.33±0.48 eggs per female). The photomicrographs for general morphological characteristics of the two mymarids from egg to adult were provided as well.

Key words: tea leafhopper, Empoasca vitis(Gothe), egg parasitoids, biology, adult longevity, supplementary nutrition