Tag: pesticides

Yet Another Study Links Lower Sperm Count with Pesticides

A new review of existing studies on insecticides has found “sufficient evidence” that exposure to high levels of insecticides is associated with lower sperm concentration in men. The review focused on organophosphate (OP) and N-methyl carbamate (NMC) insecticides. The researchers said their systematic review and meta-analysis are the most comprehensive on this topic to date.

The paper, “Adult Organophosphate and Carbamate Insecticide Exposure and Sperm Concentration: A Systematic Review and Meta-Analysis of the Epidemiological Evidence,” was published in the journal Environmental Health Perspectives. It sought to answer the question, “What is the association between adult exposure to OP and NMC insecticides and sperm concentration?”

The researchers concluded that “the strength of evidence of an association between higher adult OP and NMC insecticide exposure and lower sperm concentration is sufficient enough to warrant concern, particularly in light of observed downward trends in semen quality.”

Although the paper acknowledges numerous factors that impact sperm concentration, such as age, nutrition, and lifestyle, they also point the finger at “reproductive toxicants in the environment,” particularly endocrine-disrupting chemicals.

“Reproductive toxicants are ubiquitous in the environment, and usually go unnoticed until unintended adverse effects are observed,” they write. “Pesticides are a prime example in that pesticides have known endocrine disrupting and reproductive effects but continue to be manufactured and widely applied, resulting in occupational and environmental exposures.”

Regarding occupational exposures, the review noted that workers exposed to toxins in the course of their job “generally experience higher exposures than the general population.” However, they also noted that because of widespread exposure to the chemicals in the environment, “even a small magnitude of effect could have consequential impacts on sperm concentration at a population level.”

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Study Shows Pesticide Companies Hid Developmental Neurotoxicity Data From EU Regulators

A recently published study reveals that pesticide companies have failed to disclose data related to brain toxicity. What does this mean for toxicity data in other fields of research?

Recently, the U.S. Geological Survey acknowledged that at least 45% of the nation’s tap water is estimated to have one or more types of the chemicals known as per- and polyfluorinated alkyl substances, or PFAS, also known as forever chemicals. This is, unfortunately, just the latest in a string of similar admissions relating to water quality which have come to light in recent years.

As more Americans grapple with the reality that we are swimming in a soup of toxins and radiation, Europeans are becoming aware of the lack of transparency involving studies of pesticides, and potentially other toxins.

A study published in early June found that some studies of pesticides relating to developmental neurotoxicity (DNT) were submitted to the U.S. Environmental Protection Agency (EPA), but not to regulatory bodies within the European Union. It took between 14 and 21 years for EU regulators to become aware of these studies. Once they were aware of the data, they enacted new safety regulations in some cases and continue to evaluate necessary steps in others.

A DNT test typically exposes pregnant female rats to a pesticide to assess their offspring for neuropathological and behavioral changes. The tests have been useful for identifying chemicals which will cause DNT in humans.

The study was first reported on by The Guardian in collaboration with European outlets Bayerischer Rundfunk/ARD, Der Spiegel in Germany, SRF in Switzerland, and Le Monde in France. It has received little attention in the American media.

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EPA Refuses to Regulate Pesticide-Coated Seeds That Harm Pollinators

Last week, the U.S. Environmental Protection Agency (EPA) denied a legal petition by Center for Food Safety (CFS), Pesticide Action Network of North America and others, demanding that the agency fix its failure to regulate pesticide-coated seeds, which are known to be widely harming bees and other pollinators.

These crop seeds are coated with systemic insecticides known as neonicotinoids, the most widely used insecticides, and have devastating environmental effects.

CFS filed the rulemaking petition in 2017 that would close the loophole, but was forced to take take the agency to court when EPA failed to answer the petition as of late 2021.

Last week’s response is issued pursuant to a court-set deadline.

“We gave EPA a golden chance and a blueprint to fix a problem that has caused significant harm to people, bees, birds, and the environment — and it stubbornly refused,” said Amy van Saun, senior attorney with the Center for Food Safety. “It’s extremely disappointing and we’ll be exploring all possible next steps to protect communities and the environment from the hazard of pesticide-coated seeds, including a lawsuit challenging this decision.”

Crops grown from pesticide-coated seeds, such as corn, soybean and sunflower seeds cover over 150 million acres of U.S. farmland each year.

Neonicotinoids are taken up into the plant’s circulatory system as the plant grows, permeating leaf, pollen, nectar and other plant tissues. Neonicotinoids affect the central nervous system of insects, causing paralysis and death.

Sublethal impacts include impaired navigation and learning. As a result, beneficial insects, valuable pollinators and birds — including threatened and endangered species protected under the Endangered Species Act — are killed or injured.

For songbirds, ingesting just one neonic-coated seed can cause serious harm or death.

Additionally, more than 80% of the pesticide coating can leave the seed, contaminating the air, soil and waterways of surrounding environments. Most notably, clouds of neonicotinoid-laced dust released during planting operations have caused mass die-offs of honeybees and wild native bees.

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Pesticides Increase Transmission of Debilitating Snail Fever Affecting Hundreds of Millions of People

Widespread use of pesticides, including the world’s most used herbicide, glyphosate, can speed the transmission of the debilitating disease schistosomiasis (snail fever), while also upsetting the ecological balances in aquatic environments that prevent infections, a new study led by researchers at the University of California, Berkeley has found.

Schistosomiasis (also known as Snail Fever and Bilharzia) is a disease of poverty that leads to chronic ill-health, according to the World Health Organization. Infection is acquired when people come into contact with fresh water infested with the larval forms (cercariae) of parasitic blood flukes, known as schistosomes. The microscopic adult worms live in the veins draining the urinary tract and intestines. Most of the eggs they lay are trapped in the tissues and the body’s reaction to them can cause massive damage.

Schistosomiasis affects almost 240 million people worldwide, and more than 700 million people live in endemic areas. The infection is prevalent in tropical and sub-tropical areas, in poor communities without potable water and adequate sanitation.

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