Keep Kosher, Keep Pesticide Free
According to the TheDailyGreen.com the following foods are:
LOW in pesticide residue: onion, avocado, corn, pineapple, mango, asparagus, peas, kiwi, cabbage (Star-K Red Cabbage Consumer Alert), eggplant, watermelon, broccoli, tomato, and sweet potato.
HIGH in pesticide residue: celery, peaches, strawberries, apples, blueberries, nectarines, potatoes, spinach, kale, cherries, grapes, leafy greens, bell pepper, carrots, and pears.