Mating ability of Glossina morsitans morsitans tsetse flies that emerged after irradiation and transportation of 22- and 29-day-old pupae groups. Pupae were irradiated and transported at either 22 or 29 days of age from pupation. Comparison of mating ability between treatment groups of each age. The graphs represent the minimum, first quartile, median, third quartile and maximum for each treatment. Bars indicated by the same lower-case letter or number did not differ significantly at the 5% level.