to ATP, Meridie! I have large bamboo and small bamboo. I cut the small (1/2in or so) ones with my loppers. The culms of my large type are nearly 2in. diameter so much too large for pruners, even the big loppers. I use my DH's Sawzall (not a chainsaw, but a reciprocating saw with a nice size blade about the size of a large knife) for those. Works great and I can cut them at a nice angle so that they are easy to put in the ground. If you don't have something like that, a hand saw such as you'd use for wood will work fine, but be a little more labor.
Ken is right, bamboo does take a very long time to cure, and if you don't cure it, the part that's in the ground will rot quite quickly. I don't worry about this too much as I have a lifetime supply. I just use them until they rot, then cut off the bottom part and use them again another year.