What do peaches, apples, sweet bell peppers, celery, nectarines, strawberries, cherries, lettuce, imported grapes and pears all have in common? Research done by the respected Environmental Working Group (EWG) determined from 45 produce items these 10 typically have the highest amounts of residual pesticides. So make them your priority when buying organic.
Alternatively, join one of the several organic farm-to-home delivery services such as Planet Organics
Here are the relevant links for more info: