Assuming it’s using some sort of ML to detect the bugs, that’s a matter of just inputting a new set of data. Easier to update a set of training images than find new poisons that don’t kill absolutely everything.

Or they would start widening their diet to include non-agricultural plants as well. That, too, is a way of escaping the killer robots.

> camouflage/hiding from the zapper

Mirrored carapace. The refection could even harm the sensor.