ECOLOGY AND POPULATION BIOLOGY Demography of Habrobracon hebetor (Hymenoptera: Braconidae) on Two Pyralid Hosts (Lepidoptera: Pyralidae)

DemographyofHabrobraconhebetor(Say)(Hymenoptera:Braconidae)on twopyralid host species [Galleria mellonella (L.) and Ephestia kuehniella Zeller] (Lepidoptera: Pyralidae) was studied at 28 C in the laboratory. Data were analyzed based on an age-stage, two-sex life table, to take both sexes and variable development into consideration. The intrinsic rate of increase (r), Þnite rate of increase ( ), net reproductive rate (R0), gross reproductive rate (GRR), andmean generation time (T) ofH. hebetor onG.mellonellawere 0.1520 d , 1.1640 d , 12.5 offspring, 50.1 offspring, and 16.8 d, respectively. These values were not signiÞcantly different from the values obtained for E. kuehniella, i.e., 0.1375d , 1.1473d , 11.9 offspring, 54.9 offspring, and 18.2 d. The life expectancyof anH.hebetor egg was 10.6 d on E. kuehniella and 10.4 d on G. mellonella. On both host species, the maximum reproductive value of female H. hebetor occurred on the 12th day.