The chemical is atrazine and it tests it did turn frogs from male to female. We can quibble over whether or not dosage matters but I think it should also be uncontroversial that using a chemical that disrupts hormones like that should not be used on food that we consume.
The company that makes atrazine (an aromatase promoter) knows that it causes increases in cancer in humans. That's why they (under other names) also sell cancer drugs that work by being aromatase inhibitors. They'll sell the poison and then sell you the "cure".
