Consider the Cane Toad problem in Australia as a case in point. Introduced in 1935 to control a beetle that attacked sugar cane, it became a huge ecological disaster. It also failed to solve the original objective.
It appears the toads have evolved longer legs so they can travel faster and further.
The big problem with the toad is that they are poisonous. Native larger animals eat them and die, which reduces biodiversity and leaves the toads free to grow and expand.
It appears the toads have evolved longer legs so they can travel faster and further.
The big problem with the toad is that they are poisonous. Native larger animals eat them and die, which reduces biodiversity and leaves the toads free to grow and expand.
https://en.wikipedia.org/wiki/Cane_toads_in_Australia