Abstract
Demographic studies were carried out for Tribolium freemani HINTON on a wheat shorts or wheat flour medium under a laboratory condition (32.5°C and 73% r.h.). The sex ratio determined at pupal stage was 1 : 1. The mean lonevity of females and males was 329.1 and 346.7 days, respectively. The survivorship curves for both sexes were negatively skewed rectangular type. A female produced ca 1, 000 eggs during her enitre life. The intrinsic rate of increase (rm) was 0.073 per day, the net reproductive rate (R0) was 351 and the mean generation time (T) 80.6 days. T.freemani had a relatively low age specific reproductive value (vx) which was retained for a long period. Ecological and pest status of T. freemani, in comparison with other Tribolium species ofstored-product pests, was discussed.
