none Ephestia elutella; Paralipsa gularis; Plodia interpunctella; HYMENOPTERAN-PARASITES; Bracon hebetor; Parasite biology; SOUTH-KOREA; Hymenopteran parasite biology Bracon hebetor; LIFE-CYCLE; Seasonal emergence; DEVELOPMENT-; Characteristics of parasite; LEPIDOPTERAN-HOSTS; Ephestia elutella, Paralipsa gularis & Plodia; Parasite biology; POPULATION-SEX-RATIO; Parasite on lepidopteran hosts; SOUTH-KOREA; Biology Tobacco moth, Ephestia elutella H., is one of the most serious insect pests of stored tobacco. Their ecto-parasitic hymenoptera, Bracon hebetor S., had two peak times of adults emergence i.e. middle of May and late of September in tobacco warehouse. B. hebetor S. layed 12.6 +- 2. 33 eggs on a larvae of Paralipsa gularis Z., 6.2 +- 0.67 eggs on a larva of Plodia interpunctella (H.) and 3.5 +- 0.53 eggs on a larva of Ephestia elutella (H.) Emerged adults of parasitic hymenoptera were calcurated on each host such as 4.43 +- 1.67, 3.00 +- 0.93 and 2.34 +- 0.21. Larval periods of B. hebetor S. on each larvae of various hosts were investigated 7-9 days and pupal periods were 8-10 days, respectively. The sex ratio of B. hebetor S. with P. gularis Z., P. interpunctella H. and E. elutella H. as hosts, were found to be 63.1, 63.6 and 61.9% male, respectively.