Nathan Myhrvold (of Microsoft fame) tried to build a laser to kill mosquitoes, ~11-12 years ago. He even gave a TED talk about it [0].
It seems that the project eventually failed to achieve anything of sufficient value. [1]
[0]: https://www.ted.com/talks/nathan_myhrvold_could_this_laser_z...
[1]: https://nymag.com/intelligencer/2017/07/laser-shooting-mosqu...