There are attempts to do exactly this where certain types of mosquitos are given something that makes them impotent after some number of generations. It can cre

There are attempts to do exactly this where certain types of mosquitos are given something that makes them impotent after some number of generations. It can create other issues, though, in regards to the disruption of that part of the food chain. This is from memory from a few years ago and I don't have a source on hand.