The Environmental Working Group has a new report noting that

In addition to celery and peaches,strawberries, apples, domestic blueberries and nectarines made the “Dirty Dozen” list. Onions, avocados and sweet corn remain the cleanest produce, along with cantaloupe, grapefruit and honeydew which were tested for the first time.

However, as the article about the new report goes on, the

American Journal of Clinical Nutrition found a lack of evidence showing that organic produce has health benefits beyond conventional versions because so few relevant studies – 12 — have been conducted.

Not many studies, to say, one way or another. Still in all, it’s difficult to know how pesticide laden some of our food is, so eating a good variety, from different producers, seems like a good idea.