It sounds like they’re being careful with it, but…
However, some critics say that it is impossible to be certain that the Japanese insect will only target the superweed and could attack other species once in the wild.
I remember reading a book as kid about a town overrun with mice. They bring in cats to rid the mice, then dogs to rid cats, and so on and so on until they’re infested with elephants, at which point they bring back the mice and decide they can live with that.
Still pretty cool, though