Get a Panda Bear??
Hopefully you saved all that you cut down, that stuff is pricey.
I use it all the time and sell it to my clients who need a plant, small tree or veggie staked. I just wait until someone is attempting to get rid of a patch and go collect a bunch.
I've been working on a bunch of about 150 10' long stems for about a year, I need to restock.
Look into Tordon. Even Though Bamboo is not on the label. it should work. It may take repeated apps.