Glad you don't have them in "outdoor soil"; fumigation with synthetics is what works for most (not organic). IMHO, find the source of "contamination" and stay off the never ending "pesticide hamster-wheel".
Heat (no synthetics/poisons) is how I controlled the lil buggers.
Cheers!
Heat (no synthetics/poisons) is how I controlled the lil buggers.
Cheers!