A simple and easy method for rapidly evaluating the physiological activities of some causal factors from adult females of endoparasitoids Molecular detection and sequence analysis of wsp gene from Wolbachia in two species of pteromalids, Pteromalus puparum and Nasonia vitripennis Effect of adult nutrition and mating on ovarian development and vitellogenesis in the endoparasitoid, Pteromalus puparum