re: What’s a good herbicide to kill trees at the stump? Specifically crape Myrtle?

I had success with fire on a crepe myrtle. Drilled holes as deep as I could and soaked with kerosene several times over a day or so, then put some fire wood around it and had a nice fire. Burned deep into the ground.

Still get shootups occasionally, but I don't think anything stops those. I just mow over them and they get fewer and further between.

ETA:

I'm weird about pesticide and herbicide though. Try to avoid as much as I can since my kids and dogs are constantly playing outside.