How to get rid of cactus.

Its pretty good eating.

See if any local mexican markets are interested.

Thats prickly pear. That stuff is a trickin weed and takes over everything. Its not gonna be easy to get it out. Take it from one who lives in AZ.

24-D will kill it.

We pry it up with a front end loader like other have said. It does good damage, but it will come right back. You never get all of it, and you could take one ear, throw it on its side on the ground, and it will root and start making new ears.

You can blow torch the needles and cows will eat it.

To answer your question, you can't get rid of it, but you can manage it.

I've always killed cactus by watering it.