I'm not sure about opposite, but there's this (an undergrad discovered traces of DDE on organic carrots in 2005): https://www.sciencenews.org/blog/food-for-tho

I'm not sure about opposite, but there's this (an undergrad discovered traces of DDE on organic carrots in 2005): https://www.sciencenews.org/blog/food-for-thought/organic-doesnt-mean-free-pesticides https://www.sciencenews.org/blog/food-for-thought/organic-do...