Actually, I avoid produce from Mexico. Too many stories of tainted lettuce and other vegetables or fruit. Whatever I buy, I look for the "Grown in the USA" label or something similar.
Of course, now with so many Mexican illegals in this country, God only knows what they do to our produce. US produce might not be safe either.
Now my brother, who has been to Chile several times, says grapes and other produce grown in Chile are safe. He says Chile, unlike Mexico, understands the concepts of good hygiene and sanitation.