Lawyers involved in U.S. litigation accusing Syngenta AG of spending decades selling an herbicide that causes Parkinson’s disease are moving toward selection of a bellwether trial to be held roughly a year from now, according to the federal judge overseeing the litigation. In a hearing on Friday, U.S. District Judge Nancy Rosenstengel of the Southern … Litigation alleging Syngenta’s paraquat weed killer causes Parkinson’s disease moving toward trial