Because these pesticides might be harmful for European workers, working on these farms, or the ecosystem surrounding it?
Saying "Look we don't want any of these pesticides in the final product delivered to us" is easier in negotiations than forcing them to accept all EU Regulations regarding farming for Mercosur
Well that's great for the EU consumer, but citizens have interests beyond those of mere consumers, and this doesn't help put their farmers on equal footing.
Saying "Look we don't want any of these pesticides in the final product delivered to us" is easier in negotiations than forcing them to accept all EU Regulations regarding farming for Mercosur