Pesticides: A link to Parkinsons?

Curious about the affects of boxing and Parkinson's disease I searched for an article that could maybe explain in detail why many boxers suffer from Parkinson's disease later in life. However, my quest for this information brought me to an article on Web MD about pesticides and their possible influence on Parkinson's disease. Being a review article it does not go into much detail about the manners in which they believe prolonged exposure to pesticides can be linked to the disease. I found this interesting in that I have not heard of this possible link until now. I then searched other sources for further information and found that a study with more than 300 Parkinson's sufferer found that sufferers were more than twice as likely to report heavy exposure to pesticides over their lifetime. The strongest associations were between people with Parkinson's who had been exposed to herbicide and insecticide chemicals such as organochlorides and organophosphates. No links were found between Parkinson's disease and drinking well-water or living or working on a farm, two commonly used proxies for pesticide exposures. They also believe that genetic disposition for Parkinson's also plays a role in the onset of the disease after prolonged pesticide exposure. Although evidence is not definite I find this possible link very crucial and hope to see more research conducted behind these findings.