Here's the most recent list of various foods and their pesticide contents.

The Dirty Dozen

Highest in Pesticides - Buy these organic

Celery   Peaches   Strawberries   Apples    Blueberries    Nectarines    Bell Peppers   Spinach   Cherries   Kale/Collard Greens   Potatoes   Grapes

The Clean 15

Lowest in Pesticides

Onions   Avocados   Sweet Corn  Pineapples   Mangoes   Sweet Peas   Asparagus   Kiwis   Eggplant   Cantaloupe   Watermelon  Grapefruit   Sweet Potato  Honeydew

Source : www.foodnews.org