Mean spermathecal value (MSV) of Glossina morsitans morsitans tsetse females mated with Glossina morsitans morsitans tsetse males that emerged from the irradiation and transportation (relative to the controls), of the 22- and 29-day-old pupae groups. Pupae were irradiated and transported at either 22 or 29 days of age. Comparison of MSV between treatment groups at each age. The graphs represent the minimum, first quartile, median, third quartile and maximum for each treatment. There were no significant differences within the groups.