The EWG Shopper’s Guide to Pesticides shows which fruits and vegetables have the most pesticide residues. These fruits and vegetables are the most important to buy organic. Avoid the twelve most contaminated fruits and vegetables and eat the least contaminated produce.
Remember, while it is good to avoid pesticide exposure, the health benefits of fruit and vegetables in the diet outweight these risks. Eating conventially grown produce is much better than not eating fruits and vegetables at all.