George Isaak used paraquat to treat weeds on orchard and vineyard property from 1964 through 2004, mixing, loading and spraying the pesticide routinely before he was diagnosed with Parkinson’s in May of 2020, according to his lawsuit.

Syngenta AG is facing a growing number of U.S. lawsuits over allegations that its paraquat herbicide causes Parkinson’s disease, with a Fresno, California man pushing for an expedited trial that potentially would start within the next few months, and multiple plaintiffs’ lawyers jockeying for power and influence over future trial proceedings.

Plaintiff George Isaak used paraquat to treat weeds on orchard and vineyard property from 1964 through 2004, mixing, loading and spraying the pesticide routinely before he was diagnosed with Parkinson’s in May of 2020, according to his lawsuit.

Isaak used a 200-gallon “spraying rig” on the 60-acre farm where he raised peaches, nectarines, almonds, pistachios and grapes before retiring in 2005. Isaak, 84, now has such severe Parkinson’s symptoms that he has suffered several falls, finds it hard to speak, and is confined to a wheelchair, according to his lawyers.