Efforts to manage four species of economically important fruit flies in the Hawaiian Islands involve four techniques of fruit fly population control. Male annihilation, sterile insect release, protein-lure abatement, and the use of parasitoids are methods currently being utilized simultaneously. In order to predict fruit fly population dynamics in response to these methods, we developed a system of delay differential equations and conducted analyses using parameter values derived from field experiments. From our analysis we have outlined the most effected timing and use of the four techniques described.