Killing root ofY ucca

Keltis

I’ve take out three Yucca tubers but there’s a large lump of root left. How can I kill it without harming surrounding plants please?

Mrs-B3-Southampton,-Hants

Please can someone answer this because I have one I want to get rid of.

AnniD

Maybe something like SBK stump killer ?
https://www.wilko.com/sbk-tree-stump-killer-250ml/p/0478644?gclid=EAIaIQobChMIsOzVy7SJ-QIVEZftCh2QbQLGEAQYAiABEgJkWvD_BwE&gclsrc=aw.ds

(Other makes are available)

Keltis

Thank you