Diadegma molliplum was reared in the laboratory on the larvae of Phihorimaea operculella. At 20, 25 and 300C, the parasite egg incubation periods were 64.3, 46.6 and 34.8 h resp. The larval stage lasted 17.8, 12.6 and 9.4 days, resp., and the pupal stage lasted 8.2, 6.3 and 4.5 days, resp. 'Me total development periods from egg to adult were 29.7, 21.2 and 15.5 days, resp. The longevity of adult males was 28.8, 17.4 and 9.5 days, resp., whilst that of females was 34.8, 20.2 and 15.4 days, resp.The parasite's sex ratio was 1 male to 1.4 females, a larger proportion of females than in the wild. The number of eggs laid per host larva ranged from 1 to 25 but only 1 developed per host. A female laid on average a total 309 eggs at an average rate of 16.2/day. none