Nature does have decent pest control, but the way we do farming does basically everything to circumvent it.
If you were actively trying to encourage the development of new forms of highly specialized pests, setting up a continent-scale monoculture with low genetic diversity is pretty much the best way to do it. It's also largely how modern farming works.
If you were actively trying to encourage the development of new forms of highly specialized pests, setting up a continent-scale monoculture with low genetic diversity is pretty much the best way to do it. It's also largely how modern farming works.