Parkinsons and spraying
One commonly used fungicide and one commonly used herbicide are linked to Parkinsons, see:
Please cite this article in press as: Negga R ,etal. Exposure to Mn/Zn ethylene-bis-dithiocarbamate and glyphosate pesticides leads to neurodegeneration in Caenorhabditis elegans.
Apparently this nematode is considered a good test system for Parkinsons studies. The abstract is quite technical. I have the full paper, but I cannot distribute an "in-press" paper. I could not find simple sections to cut and paste in order to make the results clearer.
Here is a link that might be useful: link for above