Kudzu will probably be the first thing to grow back. ;)
If they're gonna do genetic engineering, why not breed fireants with a fatal, insatiable taste for kudzu?
Beware! Even as we speak, scientists at Texas A&M are studying some South American gnats that they hope will stop the fire ant menace. Apparently, the gnats are the fire ant's natural enemy, killing them by biting them behind the head and sucking the fire ant's brains out.
Only a moron or someone from Oklahoma wants Aggies importing brain sucking gnats into Texas.