paraquat

October 27, 2022

Amid calls for ban on weed killer linked to Parkinson’s, a battle over science

By Carey Gillam

When US regulators issued a 2019 assessment of the widely used farm chemical paraquat, they determined that even though multiple scientific studies linked the chemical to Parkinson’s disease, that work was outweighed by other studies that did not find such links. Overall, the weight of scientific evidence was “insufficient” to prove paraquat causes the brain disease, officials with the US Environmental Protection Agency (EPA) declared.

The EPA reiterated its assessment in a 2021 report. The agency said after extensive analysis of numerous factors, including concerns about Parkinson’s risk, it determined farmers could safely continue to apply the weed killer across millions of US acres to help in the production of soybeans, corn, cotton and an array of other crops.

The determination has been significant for Syngenta, the longtime maker of paraquat weed killers. The company is facing calls in the US for a paraquat ban, as well as more than 2,000 legal claims brought by farmers and others alleging they developed Parkinson’s disease because of their exposure to paraquat.

Syngenta cites the EPA assessment of the science on paraquat in defense of the pesticide, and says scientific research “does not support” a causal relationship between the chemical and the disease. On a Syngenta-run paraquat information website, the company highlights several studies it says also backs that position, including many conducted by company scientists or by outside scientists who received company funding for their work.

Last week the Guardian and The New Lede reported that internal corporate records show Syngenta had knowledge of science linking paraquat to Parkinson’s decades ago but sought both to refute the evidence with various secret tactics. The documents are available at the Paraquat Papers Media Library.

US farmworker, health and environmental advocacy groups say in contrast to the corporate science, research conducted by independent scientists provides abundant evidence of paraquat’s ability to cause Parkinson’s and other health dangers, and the EPA is improperly discounting that body of research.

More than 50 groups have called for the US to follow the lead of dozens of other countries in banning paraquat. The Michael J. Fox Foundation for Parkinson’s Research submitted a petition to the EPA with 107,000 signatories calling for a ban. The foundation cited a study that found people exposed to paraquat in their teens or as young adults had an increased Parkinson’s risk of 200 to 600 percent, depending on the overall exposure.

October 21, 2022

A human toll- paraquat users blame Syngenta for Parkinson’s disease

By Carey Gillam and Aliya Uteuova

When Illinois farmer Ron Niebruegge was diagnosed with Parkinson’s disease at the age of 55, he was certain it must be a mistake. Niebruegge had always been healthy and active, someone who loved horseback riding and taking his wife dancing on weekend nights.

But a dizzy spell and a fall in 2007 led him to visit a neurologist, and then another. Both doctors agreed that the little things Niebruegge had started to notice – a left arm that didn’t seem to work quite right, some stiffness in his joints – were undeniable signs of the onset of Parkinson’s, a progressive debilitating brain disease for which there is no cure.

Now 70 years old, Niebruegge lives a very different life: The horses he loved have been given away and the horse trailer sold. Dancing is a thing of the past; Niebruegge struggles simply to walk across a room. He uses a cane but falls so frequently and unexpectedly that he fears leaving home.

One recent fall left him with a dislocated shoulder that required surgery. And his wife of 49 years has transitioned from dance partner to caregiver.

Niebruegge is far from alone. More than 8 million people globally suffer from what scientists see as the fastest growing neurological disorder in the world. And while scientists see multiple toxins as potential causes, one pesticide popular with farmers across the US has been prominently linked to the disease: a weed killer called paraquat that has grown in use over recent decades.

The longtime manufacturer of paraquat, Syngenta AG, along with Chevron USA, the successor to a former US paraquat distributor, are now being sued by thousands of Parkinson’s sufferers. The plaintiffs claim scientific studies show that exposure to paraquat can cause, or significantly increase the risk of, Parkinson’s disease, but rather than warn users, the companies prioritized paraquat sales over human health.

October 20, 2022

Secret “Paraquat Papers” reveal corporate tactics to protect weed killer linked to Parkinson’s disease

By Carey Gillam and Aliya Uteuova

For more than 50 years, Swiss chemical giant Syngenta has manufactured and marketed a widely used weed killing chemical called paraquat, and for much of that time the company has been dealing with external concerns that long-term exposure to the chemical may cause the dreaded, incurable brain ailment known as Parkinson’s disease.

Syngenta has repeatedly told customers and regulators that scientific research does not prove a connection between its weed killer and the disease, insisting that the chemical does not readily cross the blood-brain barrier, and does not affect brain cells in ways that cause Parkinson’s.

But a cache of internal corporate documents dating back to the 1950s obtained by The New Lede in a reporting collaboration with the Guardian suggests that the public narrative put forward by Syngenta and the corporate entities that preceded it has at times contradicted the company’s own research and knowledge.

And though the documents reviewed do not show that Syngenta’s scientists and executives accepted and believed that paraquat can cause Parkinson’s, they do show a corporate focus on strategies to protect product sales, refute external scientific research and influence regulators.

In one defensive tactic, the documents lay out how the company worked behind the scenes to try to keep a highly regarded scientist from sitting on an advisory panel for the US Environmental Protection Agency (EPA). The agency is the chief US regulator for paraquat and other pesticides. Company officials wanted to make sure the efforts could not be traced back to Syngenta, the documents show.

And the documents show that insiders feared they could face legal liability for long-term, chronic effects of paraquat as long ago as 1975. One company scientist called the situation “a quite terrible problem,” for which “some plan could be made….”

farmer-spraying-pesticide-royalty-free-image-1629408657

May 26, 2022

EPA backing of pesticide poses human health risks, groups allege

The Environmental Protection Agency (EPA) is risking the health of farmworkers and other Americans by allowing continued widespread use of a highly toxic pesticide called paraquat that has been linked to Parkinson’s disease and other health problems, a coalition of advocacy groups alleged in court filings this week.

The group of eight organizations is challenging a 2021 EPA decision that the group’s allege violates federal law. They say the EPA failed to adequately account for the “magnitude” of the risks posed by paraquat use, and improperly determined that the benefits of paraquat for crop production outweigh the dangers to farmworkers and others.

May 10, 2022

Guest column: Syngenta’s paraquat product kills weeds, but also people

By Jon Heylings

From 1986 until 2008, I worked as the lead scientist on a project aimed at creating a “safer” paraquat-based weed killing product for what was then known as the ICI Central Toxicology Laboratory, which became part of Syngenta AG in 2000.

March 4, 2022

Syngenta’s Monsanto moment

Five years ago the once seemingly invincible Monsanto Co. was dealt its first searing courtroom loss over allegations that its glyphosate weed killer causes cancer and Monsanto worked to hide the risks. That loss was followed by another, and another, and the global recognition of damning internal Monsanto documents that ultimately led Monsanto owner Bayer AG to agree to pony up more than $11 billion to settle thousands of cancer claims. The litigation still lingers as Bayer wrestles with angry investors and plans to remove glyphosate-based products, such as the widely used Roundup herbicide, from the US consumer market.

Now it’s Syngenta’s turn.