Dear Friend, Never been to South Texas, and maybe someone down there could help, but here in New England, we use the old fashioned fly paper. This is a roll of sticky paper, looks like an old fashioned film canister, and it works well. I have put it by the cage, hanging off the ceiling, and had much success. Those big ants, we have some and my mother always called them "Tree Ants". I do not know what to do for them, have heard they will not cross cucumber peelings, but never had a big influx of them. If you know what they eat, I would use the Boric Acid power on them also. If you cannot find the fly paper, let me know, I'll send you some. Marilyn [Posted in FML 5761]