Bamboo can be very invasive once it becomes established, Use a glyphosate herbicide as this will be most effective on bamboo. There are lots of products on the market that use this as their main active ingredient, including Roundup and Tumbleweed. Many persistent perennial weeds require more than one application of glyphosate to weaken and destroy the plant. Dont give up after one treatment; keep on treating the new growth. By treating the new shoots as they appear eventually the plant will weaken giving a better chance of controlling it. Alternatively try digging it out or burning the new shoots off with a flame wand. Whatever the chosen method, to have any real effect, the plant will need to be attacked several times. Using a combination of these methods to make life really difficult for the bamboo – remember persistence is the key to success!