It is nearly impossible to dig up Jerry due to it being so rootbound so I didn't even offer to give any away.
RoundUp is exactly what I used. I cut the canes down near the ground last year and poured undeluted RoundUp into each cane. Green foliage has popped up in a few places and I sprayed it with a strong solution of RoundUp. I have a 2' deep root barrier surrounding the black bamboo but that stuff is so aggressive that it went under it in several places and that is why I decided it had to go.