What you need is the Meropidae bird, which is native to Africa also occurs in southern Europe, Australia, and New Guinea, this is the Wasp's only known natural predator. Sure you could waste money on chemicals that would probably work better than bringing a new speices of bird to set free in the US, but we have this thing called Evolution (in most states) that can wipe them out the natural way. And this Meropidae bird is actually a really nice looking bird, so we gain that too.