Abstract: Laboratory experiments were conducted to evaluate if Meteorus pulchricornis (Wesmael) attacks host larvae infected with the bacteria Empedobacter brevis and transmit the pathogen through parasitization from infected to healthy hosts. In the non-choice parasitism experiment using Spodoptera litura (Fabricius) larva as the host, bacterial concentration (5.0×10⁷, 1.25×10⁷ and 3.13×10⁶ cfu/mL) and the time post infection were manipulated in a factorial design on hosts, which in groups were then exposed to parasitism. The experiment showed that there were no significant interactions between the bacterial concentration and the time post infection on parasitism rate. When the bacterial concentration was higher (5.0×10⁷ and 1.25×10⁷ cfu/mL), the variation in parasitism rate was wide (10%－20%) across the time post infection, but when the concentration was lower (3.13×10⁶ cfu/mL), the variation in parasitism rate was narrow (10%－15%), both showed quadratic curvilinear relationships. In the dual-choice parasitism experiment using S. litura larva as the host, host larvae of 1 day and another time post infection were paired and then exposed to parasitism. The results showed that the parasitoid preferred the host of 1 day to that of 3 or 4 day post infection, attacking the former by 2.5 or 2.0 times more than the later two hosts, respectively. In the pathogen transmission experiment where S. litura and Mythimna separate Walker larvae were used as hosts, respectively, and treated as different days post infection. The results showed that parasitization of S. littura rarely transmitted the pathogen (5%), but that of M. separate the parasitoid could transmit the bacteria through parasitization, with the transmission success decreasing from 40% to about 10% with the time post infection. The results of this study suggested that M. pulchricornis may attack to a small extent the host larva infected with the bacteria E. brevis, and transmit the pathogen through parasitization.