For the purpose of disease control it's not strictly necessary to exterminate all mosquitos. Mosquito borne diseases are transmitted when a mosquito bites an i

For the purpose of disease control it's not strictly necessary to exterminate all mosquitos. Mosquito borne diseases are transmitted when a mosquito bites an infected person, becomes infected itself, and later bites another person. So long as mosquitos can be eliminated from the populated areas of a region, even if only for a couple of months, the infected mosquitos will die off, and the people infected with the diseases will eventually (hopefully) recover. By the time new generations of mosquitos reach these populated areas, they will no longer be infected, there will be no infected people for them to bite, and the disease will be eradicated. Such a strategy might be more feasible than total extermination anyway since eliminating mosquitos in unpopulated regions would probably be the most expensive part of such a project due to the lack of infrastructure in those areas. Of course, once the mosquitos return, you still have to deal with those annoying bites....