Abstract: To evaluate parasitization potential of Meteorus pulchricornis against Spodoptera litura, functional responses to and searching efficiency for 2nd, 3rd and 4th instar host larvae were assessed in the laboratory. Functional responses to host larvae were in line with predictions of Holling type-II model. The attack rate was higher for the 3rd instars than for the 2nd, and was the lowest for the 4th instars. The handling time increased with host instars. Searching efficiency of M. pulchricornis was lower for 4th instars than for 2nd and 3rd instars. Our results suggest that M. pulchricornis may have stronger parasitization potential against younger than older S. litura larvae.