The relationship between the survival rate, developmental duration of Microplitis sp. in Spodoptera litura larvae and time of exposure of the host larvae to virus, the inoculation virus concentration were investigated to determined if parasites which emerged from virus-infected S.litura larvae had normal survive, and if the parasites could sever as the vector for S.litura nuclear polyhedrosis virus (SlNPV). There was no significant difference in time that parasites spent in virus-infected larvae and healthy...