There is no increase of organic farming on these fields in Minnesota, yet wildlife is coming back. Other interventions around habitat preservation and restoration, and decreased runoff, seem far more crucial. Even organic farms use fertilizer, the runoff of which is far bigger contributor to ecosystem destruction than pesticides, at least according to everything I have seen. Algeal blooms and water ecosystem destruction are caused by excess nutrients, not from death by pesticides, for example.
I would love to see soemthing new that I have not yet been able to find with regards to this evidence!