I received the info I earlier mentioned.

In the link DD_BobK gave, the Auburn link, there is mention of
yaupon. The herbicide of choice for yaupon is what my cousin used:
Garlon 4, made by Dow. Comes in 2.5 gallon containers (concentrate),
about $250 per container. Mix an 8% Garlon to diesel mix and spray
onto the bottom 20" of the bamboo. It is readily available to
consumers, so you don't need any special permits to purchase and use
it, as with the forest service's potent tree-killing herbicide. My
cousin, in Houston, purchased his Garlon 4 from Red River Chemicals.
You may have to Google for a source near you.

Once killed, you will still need to remove the dead bamboo stalks.
The roots can be left alone.... or tilled, for faster decomposition.

The coming new spring-time growth may be an excellent time for
spraying the bamboo. The new shoots will be prime for absorbing any
herbicide treatment. But note, you don't spray the leaves with the
Garlon. You spray the base/stalk of the plants, the bottom 20". New
sprouts may "qualify" as stalks.

Using concentrate RoundUp may work, also, i.e., spraying the leaves.
RoundUp may cost nearly as much as Garlon 4. You may have to test the
% mix to get the best results. For different species, different mixes
work best on the different plants.... usually a range from 5% to 10%,
which isn't too much of a range. When you have lots to spray, the
savings may make a difference, so you want to maximize your product.

Hope this helps.
Sonny