From Reuters:
The Sterile Insect Technique (SIT) is a simple idea. Scientists breed insects and expose the males to enough radiation to render them sterile. The males are then released into the environment to breed with the females, whose eggs are unfertilized and never hatch.
"The whole idea or concept is that the population would actually start to crash and eventually may actually lead to eradication of the insect, and therefore eradication of the disease and less malaria," said Knols, who has personally suffered nine bouts of malaria through working with mosquitoes.
I still think DDT was easier...