Bringing in one invasive species to kill off another often doesn’t work.
Nutrias (think ‘large water rats’)were brought into the US southern states to eat water hyanciths years ago. It didn’t work and the nutrias stayed, creating holes in irrigation dykes for their nests.
Kudzu was brought in to stop erosion. It now covers the south in a strangling green blanket that nothing can stop apparently.
I read where Texas A&M is studying a plan to kill off fire ants by bringing in from S. America the only species of insect that is their natural enemy—a gnat that bites them behind the head and sucks out their brains. What could possibly go wrong? Gig ‘em Aggies!
These gnats attack humans and suck their brains out! But don’t worry, these victims survive quite well, they’re debating on C-Spam right now.