I came here to mention that. It's scary how effective it is. I used it to decimate a large blackberry patch last year, they aren't coming back.
http://www.amazon.com/Crossbow-Herbicide-Brush-Killer-Gallon/dp/B004TGNLJ8
This will take care of your bamboo problem. http://www.amazon.com/Crossbow-Herbicide-Brush-Killer-Gallon/dp/B004TGNLJ8