I treated the stumps and surrounding area with Tordon. Used my tractor FEL to push them over with the bucket and then cut them off close to the ground - this kept the thorns away from me - then moved them with a grapple bucket. Luckily no tire damage. I do have a weed burner and will give that a try. I learned the hard way there are little thorns on the bark.
The active ingredient in Tordon is picloram. I have cut some very large ones that I had 100% kill success using Pathway (picloram plus 2,4-D). I think your Tordon should kill them if you applied it shortly after cutting. I did NOT have a 100% kill rate using Remedy Ultra (triclopyr) and diesel. However, I do have good success with that combination for basal stem treatments on smaller Honey Locust trees when the bark is still smooth.
Picloram is a systemic herbicide, so do not let it get into your waterways and run into your pond.
I am pretty sure that after God created the Earth, the Devil snuck in behind him and created Honey Locust trees.
