This is from the Des Moines Register and can also be found online. Yet another reason why organic/chemical free is so important.
Research links pesticides with attention-deficit disorder:
A new analysis of U.S. health data links children's attention-deficit disorder with exposure to common pesticides used on fruits and vegetables. Although the study couldn't prove that pesticides used in agriculture contribute to childhood learning problems, experts said that the research is convincing. "I would take it quite seriously," said Virginia Rauh of Columbia University, who has studied prenatal exposure to pesticides and was not involved in the study. The findings are published in Pediatrics.
Another link for this info is: http://www.cnn.com/2010/HEALTH/05/17/pesticides.adhd/