Present value criterion in mosquito-control decisions was presented with several examples that illustrate its applicability and the modifications it allows. An actual case study from data derived in Chatham County, GA was presented. Findings of this case study suggest that permanent control contributed to the reduction of ground adulticide applications and quantities, adult densities of female mosquitoes per light-trap night, and the proportion of primary target salt-marsh species relative to total species per light-trap night.