Radiation increases mutation rates. Natural mutations occur through not vastly different mechanisms either.

In case you think no positive mutations come out of it; https://en.wikipedia.org/wiki/Mutation_breeding

We literally blasted plants with radiation and then bred the ones that looked like they had some positive mutations.

Especially the list of notable results is interesting: https://en.wikipedia.org/wiki/Mutation_breeding#Notable_muta...

You are definitely right, but I probably should have specified. Irradiating seeds is vastly different than irradiating already living specimen, and hardly transferable to insects I believe.

Irradiating the entire specimen is not so different if you also irradiate the part of them that produces the seed. You're just irradiating an earlier stage of reproduction, the result is unlikely to be different. Seeds have the advantage that they do not move and contain little water that could interfere with the radiation. The insect will produce it's own seed once irradiated, infertile or not.

It's been tried.

https://en.wikipedia.org/wiki/Atomic_gardening

"The practice of plant irradiation has resulted in the development of over 2000 new varieties of plants, most of which are now used in agricultural production"

See also:

https://99percentinvisible.org/episode/atom-garden-eden/