That seems mild.

Could we try to convince the males that they are the ugliest things on earth so they find large animals that can step on them?

Maybe come up with a liquid that you put in standing water that makes the mosquitoes grow very tiny legs and a very large left wing? You know, so they have to fly to move and they can only fly spinning like crazy.

I got a better one! Make them neon bright and glow in the dark. Make those fuckers be the center of attention. I'm talking kids with nets and old guys with cameras and microscopes with single mosquito flashes (like 1 mosquitoes per photo). And of course sugar sweet flavor? Everything under the sun trying to find them and eat them as snacks. I kinda like this one the best.