Funding for control of the tsetse fly, the primary vector of African trypanosomiasis, has been decreasing since the 1970s. This decrease in funding from governments and donor groups has limited the success of control campaigns and has necessitated the development of more cost-efficient methods of control. This study uses Kenya as its area of focus and introduces control of spatially and temporally constrained fly distributions, termed control reservoirs, as an economical means of reducing tsetse presence. These reservoirs are formed when seasonal fluctuations in environmental conditions reduce the habitat available to the fly. To identify the reservoirs, spatially and temporally dynamic species distribution maps are used, which provide tsetse distributions every sixteen days. After identifying the reservoirs, a tsetse management campaign within the control reservoirs is simulated. Finally, a costing analysis is conducted. This costing analysis calculates the results that are realized when spatial and temporal fluctuations in fly distributions are considered. The results of the costing analysis reveal that large savings are achieved if control operations take place within the reservoirs.
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