There is a place called Bamboo Giant around here, went to their website and found this interesting article.
http://www.bamboogiant.com/html/Installation.html its mostly on installtion but they do talk about controlling the growth and spread of it with barriers. Take a look. Rereading found this quote on
"Removal
The best way we know of to kill bamboo is by prolonged flooding. In the winter, berm the area around the bamboo and flood for about 2 weeks. "
Of course you can always hire some gophers!! The other pest common in California is the gopher. They love bamboo and will keep your plants from spreading by eating the new shoots.
