Organic food laced with natural poisons

"99.99 percent (by weight) of the pesticides in the American diet are chemicals that plants produce to defend themselves" The vast majority of pesticidal substances that we consume are in our diets “naturally” and are present in organic foods as well as non-organic ones. Moreover, “natural and synthetic chemicals are equally likely to be positive in animal cancer tests.” Thus, consumers who buy organic to avoid pesticide exposure are focusing their attention on just one-hundredth of one percent of the pesticides they consume.

Bruce Ames

Sourced at Forbes, quoting an unnamed Berkley study by Ames and colleagues. The Ames link is clear that he has published in this field and designed the most common test for mutagenicity but doesn't point to a specific paper.

It's no surprise that a life form that competes with us but has no legs has found a thousand tricks to be bitter, prickly, nauseating, sour, rash-causing and generally tough.  That goes into the food chain.