pesticide

February 15, 2024

Another pesticide problem on your plate

By Carey Gillam

Highlighting a fresh health concern for US consumers, a new study has found that a farm chemical linked to reproductive problems is increasingly showing up in the urine of people across the United States.

The study, published in the Journal of Exposure Science & Environmental Epidemiology on Thursday, reported that the majority of a set of nearly 100 urine samples collected from people in different states over the last few years showed the presence of a pesticide called chlormequat, which is used in agriculture to control growth in plants.

Notably, the study found that both frequency of detection and concentrations of the chemical were starkly higher in 2023 than in samples collected from prior years.

“While the sample size is small and more research will be needed to verify the extent of the problem, it is very concerning to see chlormequat chloride showing up in these samples, and at increasing levels,” said Danielle Melgar, a specialist in food and agriculture advocacy work with the Public Interest Research Group.

“It means that consumers are clearly being exposed to it. If it wasn’t linked to health concerns, that might not be an issue, but independent research has established connections to fetal and reproductive health harms in animal studies,” Melgar said.

Chlormequat is used to regulate the size of plants by blocking certain hormones. Though primarily used on ornamental plants in the United States, it is allowed on imported foods from other countries, including from Canada and Europe where chlormequat is approved for use on wheat, oats and barley.

Last year, the US Environmental Protection Agency (EPA) proposed that farmers in this country also be allowed to apply it to their food crops. By regulating the growth of crops such as wheat, yields can be improved, farmers have found.

But animal studies show chlormequat exposure can disrupt embryonic growth and contribute to other health problems.

Environmental and health advocates cite those studies in strongly opposing any expansion of use. Last year, PIRG sent a petition to the EPA, arguing “a slightly bigger harvest isn’t worth the risk to our health.”

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.

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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.