You can find a complete list of the worst and the best for pesticide residue at www.foodnews.org
Some Quick Tips to Reduce Pesticide Residues:
1.) Wash produce thoroughly, removing any outer leaves, with running water. Don't use soap.
2.) Trim visible fat and skin from meats, as pesticide residues are prone to build up in fat.
3.) Shop for produce at your local farmers market or a local co-op. You can often find less expensive organic foods in these venues.