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Daily News Blog

Archive for the 'Chlorpyrifos' Category


28
May

Inspector General Blasts Trump’s Politicized EPA, No Announced Plans to Reverse Unscientific Decisions

(Beyond Pesticides, May 28, 2021) A report by the Office of the Inspector General for the U.S. Environmental Protection Agency (EPA) concludes that scientific analyses by the agency were altered so as to favor top Trump administration officials’ policy choices in the 2018 reapproval of the highly toxic and problematic pesticide, dicamba. The report, “EPA Deviated from its Typical Procedures in Its 2018 Dicamba Pesticide Registration Decision,” was publicly released on May 24. It confirms aspects of what Beyond Pesticides and many others in the science, advocacy, public health, and environmental communities have been saying and reporting since 2016: the Trump administration executed a wholesale assault on scientific integrity in federal decision making. In its research on the matter, the Inspector General’s office (OIG) reviewed EPA’s 2016 and 2018 decisions on dicamba’s registration, documentation that purported to support those decisions, and the concerns forwarded in the ruling by the U.S. Court of Appeals for the Ninth Circuit and by many stakeholders. (See more in figure below.) It also reviewed EPA internal procedures and guidance on pesticide registration, and agency scientific integrity materials; interviewed career scientists and other agency staff; and communicated with EPA’s Scientific Integrity (Science Advisor) program staff. As reported […]

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19
May

Canada Quietly Bans Chlorpyrifos, While EPA’s 60-Day Deadline For Action Rapidly Approaches

(Beyond Pesticides, May 19, 2021) Last week Health Canada quietly announced its intent to cancel all remaining registrations of the brain-damaging insecticide chlorpyrifos. The decision by Canada’s federal pesticide regulators comes shortly after a U.S. federal court gave the U.S. Environmental Protection Agency (EPA) a 60-day deadline to make a final decision on whether to amend or cancel the chemical’s registration. With Europe and now Canada eliminating use of this hazardous insecticide, advocates are urging that the Biden Administration, under EPA administrator Michael Regan, finally puts an end to the decades of harm caused after chlorpyrifos was first registered in 1965. Up until recently, Canada and the U.S. had relatively similar provisions regulating chlorpyrifos use. Officials in both countries eliminated homeowner use, and tightened up on agricultural uses in the 2000s and early 2010s, requiring additional personal protective equipment and drift mitigation measures. However,  Health Canada  began to look at significant restrictions on chlorpyrifos in 2019, when it proposed eliminating a range of uses that threaten environmental health. Under its draft decision, regulators planned to eliminate all uses except for mosquito control, structural pest control, outdoor ornamentals, and greenhouse ornamentals. Certain agricultural uses were provided an extended phase-out period with […]

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17
May

Stop EPA’s Racist Policies that Disproportionately Harm Farmworker Children’s Brains: Ban Chlorpyrifos

(Beyond Pesticides, May 17, 2021) The U.S. Environmental Protection Agency (EPA) has less than two months to decide whether to cancel or modify its registration of the brain-damaging organophosphate insecticide chlorpyrifos, following a decision from a federal appeals court. The ruling comes after more than a decade of delay from the federal agency tasked with protecting public health and the environment from the hazards of chemicals like chlorpyrifos. The decision now falls to the Biden Administration’s EPA Administrator Michael Regan, after the previous administration reversed a proposal to ban agricultural uses of chlorpyrifos in 2017. Most residential uses of the chemical were banned in 2000.  Tell EPA to ban chlorpyrifos and other neurotoxic pesticides. The target of action by which chlorpyrifos and many other pesticides kill is the nervous system. It is not surprising, then, that pesticides also target the nervous system in humans. They are particularly hazardous to children, who take in greater amounts of pesticides relative to their body weight than adults, and whose developing organ systems are typically more sensitive to toxic exposures. The body of evidence in the scientific literature shows that pesticide exposure can adversely affect a child’s neurological, respiratory, immune, and endocrine systems, even at […]

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04
May

Federal Court Gives EPA 60-Day Deadline to Decide the Fate of Chlorpyrifos

(Beyond Pesticides, May 4, 2021) The U.S. Environmental Protection Agency (EPA) has less than two months to determine whether cancel or modify its registration of the brain-damaging, organophosphate insecticide chlorpyrifos, following a decision from a federal appeals court last week. The ruling comes after more than a decade of delay from the federal agency tasked with protecting public health and the environment from the hazards of chemicals like chlorpyrifos. The decision now falls to the Biden Administration’s EPA Administrator Michael Regan, after the previous administration reversed a proposal to ban agricultural uses of chlorpyrifos in 2017. Most residential uses of the chemical were banned in 2000.   “The EPA has had nearly 14 years to publish a legally sufficient response to the 2007 Petition,” reads a 2-1 opinion from the U.S. Court of Appeals for the 9th Circuit in San Francisco. “During that time, the  EPA’s  egregious  delay  exposed  a  generation  of  American  children  to  unsafe  levels  of  chlorpyrifos.” Chlorpyrifos is an organophosphate insecticide that is currently registered for use on a range of food crops, golf courses, and for public health mosquito control (in cases of mosquito-borne diseases). It is highly acutely toxic, causing numbness, tingling sensation, in-coordination, dizziness, vomiting, […]

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28
Apr

Pesticide Exposure Increases Susceptibility to Covid-19, Gulf War Veterans Found At Risk

(Beyond Pesticides, April 28, 2021) New evidence set to be presented at the Experimental Biology (EB) 2021 meeting held this week suggests that Gulf War Veterans and other individuals with prior pesticide exposures may be more susceptible to Covid-19 infection. As the pandemic continues, it is critically important for researchers to better understand specific vulnerabilities in population groups in order to improve care and patient outcomes. “The reason why COVID-19 causes a severe form of disease leading to hospitalization and high rates of mortality in a small segment of society is unclear,” said Prakash Nagarkatti, PhD, co-author of the study and vice president for research at the University of South Carolina. “This work sheds new light on exposure to pesticides and potential susceptibility to COVID-19 through altered immune response.”   According to recent data, out of 160,000 Covid-19 cases among veterans, the mortality rate was more than 4%. Researchers are pointing to Gulf War Syndrome, and past exposure to organophosphate pesticides as part of the problem. “We have identified a basic mechanism linked with inflammation that could increase susceptibility to COVID-19 infection among people exposed to organophosphates,” said Saurabh Chatterjee, PhD, from the University of South Carolina. Interleukin 6 (IL-6) […]

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23
Dec

Trump EPA Gives Neurotoxic Insecticide Chlorpyrifos Another Thumbs Up, Ignoring Brain Effects in Children

(Beyond Pesticides, December 23, 2020) The litany of parting shots by the waning Trump administration got longer on December 4, when the Environmental Protection Agency (EPA) announced a proposed interim decision on the very toxic pesticide chlorpyrifos, functionally continuing its registration for many agricultural uses. The interim decision purports to put in place new limitations on use of this pesticide, but they are wholly inadequate to the threat this compound represents — to young children, most concerningly, as well as to farmworkers, critical species and ecosystems, and the public. Chlorpyrifos should not be re-registered for use — i.e., its sale and use should be banned altogether, as Beyond Pesticides has asserted for years. Chlorpyrifos is an organophosphate pesticide used on scores of food crops, for mosquito (and other pest) control, and for some turf management (golf courses, especially). It has been demonstrated to be highly neurotoxic, especially to young children, leading to impaired cognitive function, developmental delays, lower IQs, attention deficit disorder, and a variety of other pervasive developmental and learning disorders. The essence of the compound’s toxicity to developing brains lies in its function as a cholinesterase inhibitor; chlorpyrifos binds to the receptor sites for acetylcholinesterase (AChE), an enzyme […]

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23
Oct

Parents Sue Manufacturer of Neurotoxic Insecticide Chlorpyrifos, Corteva (formerly Dow), for Causing Child’s Disabilities

(Beyond Pesticides, October 23, 2020) In central California, what promises to be a landmark series of lawsuits against Corteva (formerly DowAgroSciences), maker of the pesticide chlorpyrifos, is under way, spearheaded by the case Alba Luz Calderon de Cerda and Rafael Cerda Martinez v. Corteva Inc., et al. This first suit, brought by the parents of Rafael Cerda Calderon, Jr. on his behalf, charges that his lifelong disabilities were caused by chronic exposures to chlorpyrifos. The parents are suing for general damages, compensatory damages (due to Rafael, Jr.’s loss of earning capacity), medical care costs, and “punitive damages for the willful, reckless, and recklessly indifferent conduct of the Defendants” in intentionally hiding the dangers of their chlorpyrifos products from customers and the public. As with so many dangerous pesticides, absent effective federal regulation, states, cities, and other entities are taking action to protect people from this compound, and as in this case, individuals are seeking redress for harms suffered. Beyond Pesticides has long advocated for a ban on the use of chlorpyrifos because of the grave risks it poses. The case was filed in mid-September in California Superior Court, Kings County, and names not only Corteva, but also, the cities of Huron and Avenal, Woolf […]

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15
Oct

Literature Review: Pesticides Exposure Highly Correlated with Respiratory Diseases

(Beyond Pesticides, October 15, 2020) A review of scientific literature on the correlation between respiratory diseases and pesticides exposure—published in the journal Annals of Agricultural and Environmental Medicine (AAEM), “Influence of pesticides on respiratory pathology—a literature review”—finds that exposure to pesticides increases incidents of respiratory pathologies (i.e., asthma, lung cancer, and chronic obstructive pulmonary disease [COPD]—or chronic bronchitis). The review by researchers at the Iuliu Hatieganu’ University of Medicine and Pharmacy Cluj-Napoca, Cluj-Napoca, Romania, looks at how pesticide exposure adversely propagates and reinforces respiratory diseases in humans. This review highlights the significance of evaluating how pesticide exposure impacts respiratory function, especially since contact with pesticides can happen at any point in the production, transportation preparation, or application treatment process. Researchers in the study note, “Knowing and recognizing these respiratory health problems of farmers and their families, and also of [pesticide] manipulators/retailers, are essential for early diagnosis, appropriate treatment, and preventive measures.” This study results are critically important at a time when exposure to respiratory toxicants increases vulnerability to Covid-19, which attacks the respiratory system, among other organic systems. The respiratory system is essential to human survival, regulating gas exchange (oxygen-carbon dioxide) in the body to balance acid and base tissue cells for normal […]

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02
Oct

EPA Dismisses Disproportionate Harm to Farmworker Children from Neurotoxic Insecticide Chlorpyrifos, Leaves in Food Supply, Rejects Scientific Method

(Beyond Pesticides, October 2, 2020) The U.S. Environmental Protection Agency’s (EPA) September 22 announcement asserts that, “despite several years of study, the science addressing neurodevelopmental effects [of the insecticide chlorpyrifos] remains unresolved,” as reported in The New York Times. This conclusion contradicts both ample scientific evidence and the agency’s own findings. Beyond Pesticides has repeatedly advocated for a ban on the use of chlorpyrifos because of the grave risks it poses. This organophosphate pesticide is used on approximately 60 different crops, including almonds, cotton, citrus fruits, grapes, corn, broccoli, sugar beets, peaches, and nectarines. It is also commonly employed for mosquito-borne disease control, and on some kinds of managed turf, including golf courses. Exposure to the pesticide has been identified repeatedly as problematic. Most residential uses were taken off the market in 2000, after the manufacturer, DowDupont (now Corteva) was faced with EPA action. Chlorpyrifos is a cholinesterase inhibitor that binds irreversibly to the receptor sites of acetylcholinesterase (AChE), an enzyme that is critical to normal nerve impulse transmission. In so doing, chlorpyrifos inactivates the enzyme, damages the central and peripheral nervous systems, and disrupts neurological activity. The compound is associated with harmful reproductive, renal, hepatic, and endocrine disrupting effects, and most […]

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10
Sep

Pesticides and Heavy Metals Found in Blunt (Cigar) Wrappers, Cellulose-Based Rolling Papers, and other Plant-based Rolling Paper Products

(Beyond Pesticides, September 10, 2020) A new analysis by Science of Cannabis Laboratories Inc. (SC Labs) finds detectable concentrations of pesticides and heavy metals in rolling papers, with hemp/blunt wraps and cellulose-based rolling papers containing the highest levels of contaminants. The analysis follows a SC Labs’ finding of high levels of chlorpyrifos—a neurotoxic, organophosphate insecticide—in the rolling paper of pre-rolled cannabis, which was undergoing compliance testing. Although the rolling paper regulations generally track standards for toxic tobacco products (which means there is very little meaningful regulation), the rolling paper use with cannabis may add an addition layer of scrutiny since some statewide cannabis regulations and independent certifications adhere to stricter guidelines similar to organic practices. Researchers note the goals of the experiment “were to assess the exposure risks to the consumer as well as identify any potential liabilities for cannabis producers who use these products to make their pre-roll products.” This report, and others like it, are significant as cannabis use expands in in the U.S. and around the world, and given that one of the most popular ways to consume cannabis product is as a rolled cigarette. Study author and president of SC Labs Josh Wurzer, Ph.D., said, “This [issue] is something that cannabis and paper […]

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21
Aug

EPA Relied on Flawed Analysis to Allow Use of the Neurotoxic Insecticide Chlorpyrifos

(Beyond Pesticides, August 21, 2020) A foundational study of the toxic insecticide chlorpyrifos left critical data out of its analysis, resulting in decades of an Environmental Protection Agency (EPA) “safe exposure limit” that is flat out wrong, new research says. That 1972 study concluded that the amount of the chemical to which a human could be exposed before adverse effects showed up (the “no observed adverse effect level,” or NOAEL) was more than twice as high as should have been determined had the study not ignored critical data. In addition, the study points to the perennial “fox and hen house” issues at EPA, which include using research commissioned, funded, or even conducted by industry as any basis for regulation. For years, Beyond Pesticides has rung the alarm on this very dangerous pesticide, and advocated for its ban nationwide. News of this omission from the 1972 “Coulston Study” comes from a team out of the University of Washington. The researchers re-analyzed that human intentional dosing study using both the original statistical methods and modern computational tools that did not exist in the 1970s. (An important side note: such a study is unethical by current research standards.) The new analysis finds two significant […]

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20
Aug

Arctic Glaciers Entrap Pesticides and Other Environmental Pollutants from Global Drift and Release Hazardous Chemicals as They Melt from Global Warming

(Beyond Pesticides, August 20, 2020) Persistent organic pollutants (POPs), including banned and current-use pesticides are present in snow and ice on top of Arctic glaciers, according to the study, “Atmospheric Deposition of Organochlorine Pesticides and Industrial Compounds to Seasonal Surface Snow at Four Glacier Sites on Svalbard, 2013–2014,” published in Environmental Science & Technology. Past research finds that air contaminated with these environmentally bioaccumulative, toxic chemicals drift toward the poles, becoming entrapped in ice under the accumulating snowfall. As the global climate continues to rise and the climate crisis worsens, studies like this become significant, as glaciers encapsulating these toxic chemicals are melting. Upon melting, some chemicals can volatize back into the atmosphere releasing toxicants into air and aquatic systems, with the ensuing consequences. Although this research demonstrates that specific computer programs can track the trajectory of chemically contaminated air parcels with practical precision, it falls to global leaders to curtail the continued manufacturing of these chemical pollutants. [For related pieces, see Silent Snow: The unimaginable impact of toxic chemical use and DDT in Glacial Melt Puts Alaskan Communities at Risk.] Countless scientists consider Arctic environments to be “pristine,” void of direct chemical inputs from pesticides and other POPs. However, the Arctic has become a sink for […]

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23
Jul

Pesticide Use Linked to Increased Risk of Lung Cancer

(Beyond Pesticides, July 23, 2020) Chronic pesticide use, and subsequent exposure, elevate a person’s risk of developing lung cancer, according to a study published in F1000Research by researchers at the Nakhon Sawan Provincial Public Health Office and Naresuan University, Thailand. Globally, cancer is one of the leading causes of death, with over 8 million people succumbing to the disease every year. Notably, the International Agency for Cancer Research (IARC) predicts new cancer cases to rise 67.4% by 2030. Although there is a vast amalgamation of research linking cancer risk to genetic and external factors (i.e., cigarette smoke), there is increasing evidence that pesticide exposure augments the risk of developing lung cancer, as well. This study highlights the importance of understanding how pesticide use can increase the risk of latent diseases, which do not readily develop upon initial exposure.  Study researchers state, “To our knowledge, the association between lung cancer and pesticides has never been studied before among [Thai] people. The objective of this study was to investigate associations between pesticide exposure and lung cancer among people [living in Nakhon Sawan province, Thailand]. The results can be used for the prevention of lung cancer, and to support the global literature.” Lung cancer is one of the […]

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20
Jul

Take Action: Tell Public Officials to Stop Mosquito Spraying and Adopt a Safe, Effective Mosquito Management Plan

(Beyond Pesticides, July 20, 2020) Does your community spray toxic pesticides for mosquitoes? In a well-intentioned but ill-informed attempt to prevent mosquito-borne illness such as West Nile virus, many communities spray insecticides (adulticides) designed to kill flying mosquitoes. If your community is one of these, then your public officials need to know that there is a better, more-effective, way to prevent mosquito breeding. Tell your public officials to stop spraying pesticides and adopt a mosquito management plan that protects public health and the environment. The problem with mosquito pesticides. Two classes of insecticides are favored by mosquito spray programs—organophosphates and synthetic pyrethroids. In order to better target flying mosquitoes, adulticides are generally applied as ultra-low-volume (ULV) formulations that will float in the air longer than usual.  Pesticides are toxic chemicals and can exacerbate respiratory illnesses like Covid-19.Organophosphates, which include malathion (Fyfanon), naled (Dibrom), and chlorpyrifos (Mosquitomist for public health uses only) are highly toxic pesticides that affect the central nervous, cardiovascular, and respiratory systems. Symptoms of poisoning in humans include numbness, tingling sensations, headache, dizziness, tremors, nausea, abdominal cramps, sweating, incoordination, blurred vision, difficulty breathing, slow heartbeat, loss of consciousness, incontinence, convulsions, and death. Some organophosphates have been linked to […]

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09
Jul

From Udder to Table: Toxic Pesticides Found in Conventional Milk, Not Organic Milk

(Beyond Pesticides, July 9, 2020) Conventional U.S. milk contains growth hormones, antibiotics, and low to elevated levels of pesticides not found in organic milk, according to a study published in the journal of Public Health Nutrition by Emory University researchers. Milk can bioaccumulate certain organic pollutants, making it a valuable medium to assess what chemical we might be ingesting daily. With milk being one of the most consumed beverages in the U.S., in addition to its use in other popular drinks (i.e., coffee and tea), this study discloses widespread contamination and highlights the need for improved regulation. Researchers in the study note, “To our knowledge, the present study is the first study to compare levels of pesticide in the U.S. milk supply by production method (conventional vs. organic). It is also the first in a decade to measure antibiotic and hormone levels and compare them by milk production type.”  The market for conventional milk, produced in chemical-intensive agriculture, is declining, but the demand for organic milk is increasing due to concerns over chemical contamination in consumer products from pesticides and other toxic chemicals. Although the U.S. Environmental Protection Agency (EPA) sets limits for pesticide residues in food products, the agency […]

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07
Jul

Study Matches Parkinson’s Disease Risk to Zip Code, Proximity to Pesticide Use

(Beyond Pesticides, July 7, 2020) One’s zip code plays an important role in the likelihood of developing Parkinson’s disease (PD), according to data published by Louisiana State University researchers in the International Journal of Environmental Research and Public Health. With genetics and exposure to agricultural pesticide use identified as the main factors affecting PD, proximity to certain cropland and its effluent had a major impact on disease risk. As with most environmentally related diseases, this study highlights the disproportionate risk and environmental racism low income, indigenous and people of color communities endure. Researchers received access to over 23,000 PD diagnoses in Louisiana between 1999 and 2012, and mapped these data by zip code. Risk was determined calculating the number of diagnoses per 10,000 people in a given zip code, based on census data. To flesh out the role agriculture was playing in PD diagnoses, additional data derived from water quality samples taken by the Louisiana Department of Health and Hospitals, and the U.S. Geological Survey pesticide use estimates were compared against reported disease incidence. Results show that certain zip codes faced significantly higher incidence of PD than others in the state. Further, “The PD high-risk areas match closely the arbor-pastoral […]

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01
Jul

U.S. and Brazil Trying to Force Thailand to Accept Food Coated in Hazardous Pesticides

(Beyond Pesticides, July 1, 2020) As the U.S. is subject to searing criticism for inadequately regulated hazardous pesticides domestically, administration officials are standing in the way as other countries’ work toward modest reforms. According to a report published in Reuters, the U.S. is standing alongside the corrupt Bolsonaro administration in Brazil to oppose Thailand’s efforts to protect its citizens from highly toxic pesticides used in food production. Both countries launched separate complaints to the World Trade Organization after Thailand announced it would ban imports of the brain-damaging insecticide chlorpyrifos and weedkiller paraquat, which has been strongly linked to Parkinson’s disease. On June 1, Thailand added paraquat and chlorpyrifos to its list of most hazardous substances. This listing initiated a follow-on regulation that banned the import of these substances on food, set to take effect in mid-July. Thailand has been feeling the brunt of U.S. diplomatic pressure since it first proposed restrictions on toxic chemicals late last year. By December, the U.S. was able to get Bangkok to remove glyphosate from its proposal, and delay the listing of paraquat and chlorpyrifos until June. But as the current situation shows, the U.S. had no plans to stop pressuring the Bangkok government after […]

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30
Jun

Implications for Human Health: Pesticides and Other Environmental Contaminants Alter Gut Microbiome

(Beyond Pesticides, June 30, 2020) A review of scientific literature on the toxic effect of environmental contaminants—including pesticides—published in the journal Toxicological Science, “The Impact of Environmental Chemicals on the Gut Microbiome,” associates these chemicals to changes in the gut microbiome and other adverse health implications. The review, by researchers at the University of Illinois, looks at how environmental contaminants adversely effects and reinforce chemical disruption of the gut microbiome. It highlights the importance of evaluating how environmental contaminants, like pesticides, impact body regulation by gut microbiota. The study has significant implications for considerations that should be, but are not currently, a part of pesticide review and registration by the U.S. Environmental Protection Agency (EPA). Gut microbiota plays a crucial role in lifelong digestion, immune, and central nervous system regulation, as wells as other bodily functions. Through the gut biome, pesticide exposure can enhance or exacerbate, the adverse effects of additional environmental toxicants on the body. Since the gut microbiome shapes metabolism, it can mediate some toxic effects of environmental chemicals. However, with prolonged exposure to various environmental contaminants, critical chemical-induced changes may occur in the gut microbes, influencing adverse health outcomes. Karen Chiu, Ph.D., a graduate research fellow at the […]

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23
Apr

Monarch Butterfly Larvae Adversely Affected by Pesticide Drift from Contiguous Soybean and Maize Crop Fields

(Beyond Pesticides, April 23, 2020) Pesticide spray drift from adjacent farmlands expose butterfly larvae to lethal pesticide concentrations, according to research published in Environmental Toxicology and Chemistry by Iowa State University (ISU). Lack of previous experimental pesticide toxicity data makes it unclear as to what degree insecticides impact monarch butterfly (Danaus plexippus) productivity in milkweed (Asclepias spp.) habitats near pesticide-treated pasture. This study adds weight to the idea that pesticides are playing a role in the ongoing decline of this iconic butterfly, as researchers find insecticide drift from adjacent fields to be strongly associated with larval mortality. Future monarch butterfly conservation efforts should consider risks stemming from pesticide exposure when developing butterfly rehabilitation efforts, according to advocates. As co-author Niranjana Krishnan (ISU graduate student) states, “In order to make the best decisions about how and where to plant milkweed, we first need to find basic toxicity and exposure data.”  ISU researchers established monarch butterfly colonies by collecting larvae from roadside milkweeds, which they then reared in the laboratory for incubation. To analyze the relative toxicity of various insecticides on monarch butterflies, researchers applied normal field-application rates of each pesticide at different larval development stages. Scientists used a bioassay to measure the […]

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09
Apr

Honey Bee Queens’ Exposure to Pesticides Weaken Reproductive Success and Colony Development

(Beyond Pesticides, April 9, 2020) Honey bees (Apis mellifera) remain in severe decline, with U.S. beekeepers losing 30% of their managed colonies each year. A Texas A&M University (Dr. Juliana Rangel’s laboratory)  study provides evidence that chemical-intensive farming practices contaminate honey bee hives with pesticides that cause developmental delays. Researchers found that toxic pesticides adversely affect honey bee queen physiology and worker bee performance. Moreover, pesticides exacerbate the health risks associated with the declining honey bee population. When maturing honey bees’ exposure to pesticides is limited, there is an improvement in honey bee queen health and colony behavior. In agricultural settings, honey bees are exposed to an amalgamation of pesticides. AAFC and Texas A&M researchers determined which pesticides (miticides, insecticides, and fungicides) are commonly used in combination and then used those pesticide combinations to expose honey bees to field-realistic doses in the lab: tau-fluvalinate and coumaphos, amitraz, or chlorothalonil and chlorpyrifos. Researchers cultivated maturing honey bee queens in plastic cups coated with either pesticide-free or pesticide-contaminated beeswax. Honey bee queens were transferred into hives upon maturation and bred naturally. Researchers measured their egg-laying frequency along with worker bee entourage size. Post-reproduction, scientists performed a bioassay (a measurement of substance potency or concentration effects on living cells) on […]

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24
Mar

Maryland Legislature Passes Limited Ban on Chlorpyrifos Insecticide

(Beyond Pesticides, March 24, 2020) Last week, Maryland became the latest state to prohibit use of the brain-damaging insecticide chlorpyrifos, after a measure cleared both the state Senate and House. Although the legislation implements a limited ban that sunsets after four years, advocates consider this action a step in the right direction that will protect the health and safety of Maryland residents. “Even amidst our current public health crisis, the Maryland legislature acted to protect all Marylanders’ health for years to come by banning this toxic pesticide, and we are so grateful,” said Ruth Berlin, Executive Director of the Maryland Pesticide Education Network to WBOC. Chlorpyrifos is an organophosphate insecticide known to inhibit the proper nerve functioning by affecting the enzyme acetylcholine esterase. The impacts of this pesticide are particularly concerning for young children, as research finds that children exposed to high levels of chlorpyrifos had mental development delays, attention problems, attention-deficit/hyperactivity disorder problems, and pervasive developmental disorder problems at three years of age. While Maryland is the fourth state to restrict the use of chlorpyrifos, it is the second to implement these restrictions through legislation. In California, the state Department of Pesticide Regulation is implementing a phase out of […]

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12
Feb

Major Manufacturer of Chlorpyrifos Drops Out of Market, But EPA Continues to Allow Use

(Beyond Pesticides, February 12, 2020) Corteva, a company spun-off from DowDupont, will stop producing chlorpyrifos by the end of this year as a result of declining sales. Despite the move being in the interest of public health, the company is earning little praise from health advocates for what amounts to simply a shrewd financial decision. As news articles on the announcement have noted, Corteva will continue to support Environmental Protection Agency (EPA) registration of chlorpyrifos, which allows generic manufacturers to continue to sell this brain-damaging chemical. “Other people are going to continue to profit from harming children,” said Marisa Ordonia, an attorney with the group EarthJustice to Canada’s National Observer. “It is big that such a major player is saying no, we’re not going to do this any more. It’s a great signal that people don’t want brain-damaging pesticides on their food. But we’re going to continue to keep fighting to make sure children and farmworkers are protected.” At odds is the difference between halting production of chlorpyrifos and cancelling its EPA registration. While Corteva has the ability to voluntarily stop producing its own product, EPA registration permits other generic manufacturers to continue to producing the product. And, over the […]

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30
Aug

Brain Function Damage from Exposure to Organophosphate Pesticides, including Chlorpyrifos, Documented with Imaging

(Beyond Pesticides, August 30, 2019) The indictment of organophosphate pesticides gained more traction with the publication, in the Proceedings of the National Academy of Sciences, of a new research study out of the University of California, Berkeley. The research, among the first to use advanced brain imaging to assess cortical activation, shows altered brain activity, during tasks that call on executive function, in teenagers from California’s Salinas Valley (the site of significant organophosphate use) whose mothers were exposed prenatally. The UC Berkeley study underscores the slow-motion calamity of the Trump administration Environmental Protection Agency’s (EPA’s) failure to ban the use of this class of pesticides, and of chlorpyrifos in particular, which compounds carry extreme risks for children. The effects of this prenatal exposure continue to unfold during children’s critical developmental periods. Researchers used fNIRS (functional near-infrared spectroscopy) imaging to monitor blood flow in the brains of the teens, 15–17, born and raised in the Salinas Valley. They used data from the California Pesticide Use Reporting program (which documents locations and times of pesticide spraying) to estimate the subjects’ mothers’ proximity to organophosphate (OP) applications during pregnancy. The subject adolescents — estimated to have relatively high levels of prenatal exposure to organophosphates — […]

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