(Beyond Pesticides, December 19, 2024) As The New York Times reported last month, the government in South Africa declared a national emergency—23 children died and nearly 900 people were sickened from pesticide poisoning in Johannesburg’s Soweto township. The illnesses and fatalities have been traced to small amounts of highly neurotoxic pesticides, including the insecticides terbufos and aldicarb, found in local food items. These chemicals, described by South African President Cyril Ramaphosa as “street pesticides,” are being increasingly used (legally and illegally) for pest infestations in the townships and informal settlements of South Africa’s poorest communities, where poverty and inadequate waste collection exacerbates the pest management challenges. Without formal electricity, running water, or municipal garbage collection, many residents rely on highly toxic pesticides for pest infestations in their homes and makeshift markets, resulting in food inadvertently being contaminated with pesticides.  The announcement highlights the dangers of allowing these highly toxic agricultural chemicals to be used in farming, with tragic consequences for vulnerable communities when they are diverted for use in urban settings. This tragic situation also draws attention to the elevated threat that pesticides pose when stringent enforcement mechanisms are not in place to ensure compliance with pesticide restrictions, even with […]

(Beyond Pesticides, December 18, 2024) A bombshell investigation conducted by Canada’s National Observer finds that Bayer, which acquired the Monsanto chemical company in 2018, colluded with environmental and public health regulators in Canada to obstruct a proposed neonicotinoid insecticide ban originally introduced in 2018. Advocates were stunned back in 2021 when Canada’s Pest Management Regulatory Agency (PMRA)—the Canadian counterpart to the U.S. Environmental Protection Agency (EPA)—reversed its decision to phase out imidacloprid, clothianidin, and thiamethoxam by 2023. The weaponization of scientific institutions and regulatory processes is commonplace in the U.S. context, with U.S. Right to Know publishing a report earlier this year on the corrupting impact of pesticide manufacturers at the Entomological Society of America 2023 annual meeting. (See Daily News here.) There are numerous Office of Inspector General (OIG) reports signaling EPA corruption and failures, including persisting industry influence in the cancer risk assessment process, inadequate leadership in addressing community harms of a former creosote-treated wood preservative plant turned Superfund site in Pensacola, Florida, and failure to protect the public from endocrine-disrupting chemicals, to name several examples. In a recent press release, the David Suzuki Foundation, alongside numerous medical, legal, and civil society organizations, is calling on Health Canada […]

(Beyond Pesticides, December 17, 2024) A systematic review of studies on pesticides as endocrine-disrupting chemicals (EDCs) on body weight, published in Biomedicines, evaluates 36 clinical and preclinical studies and links their agricultural use to obesity. The authors, with the lead researchers from the School of Medicine and Health Sciences at Catholic University of Valencia San Vincente, Valencia, Spain, assess studies on a range of pesticides, including organophosphates, pyrethroids, neonicotinoids, and others. In addition to concluding that the EDCs promote obesity, they report that the chemicals cause “other anthropometric changes by altering lipid and glucose metabolism, modifying genes, or altering hormone levels such as leptin.” Endocrine disruption and obesity are public health concerns, and there is a wide body of science linking pesticide exposure to these effects (see more here). “Obesity is considered to be a worldwide pandemic that leads to an increase in medical costs and thus becomes a public health problem,” the researchers share. They continue, “[Obesity] is also associated with the increased production of environmental chemicals, also called environmental obesogens, used mainly in agriculture, as disease vector control, helping to prevent harmful effects caused by fungi, bacteria, or even pests, using pesticides, insecticides, and herbicides, or endocrine disruptors […]

(Beyond Pesticides, December 12, 2024) A literature review of 161 articles in Discover Toxicology finds that pesticides with different mechanisms of action cause memory and learning impairments. These effects are noted in nontarget species including humans. Pesticide “[e]xposure during development, as well as chronic environmental and occupational exposure, can contribute to decreased cognitive performance,” the researchers say. With a focus on organophosphate pesticides, synthetic pyrethroids, and neonicotinoid insecticides, the authors highlight neurological impacts. Both learning and memory are crucial for the survival of many species. “Considering the importance of learning and memory for human and non-human animal behavior and the growing association between pesticide exposure and cognitive impairment, the aim of this review was to describe the studies showing the impact of pesticide exposure on memory and learning abilities in nontarget species, providing evidence of the impact of pesticides in central nervous system function,” the researchers state. The 161 articles included in the review were identified through database searches in PubMed/Medline and Scielo. The authors note, “Inclusion criteria for article selection included all articles published in English between 2015 and 2024 containing original studies in animals or humans with single or multiple pesticides exposure.” The articles consist of 132 preclinical […]

(Beyond Pesticides, December 10, 2024) Scientists from the Engineering Research Center of Protection and Utilization of Plant Resources at Shenyang Agricultural University in China reveal adverse effects of imidacloprid on soil communities in a study published in Pesticide Biochemistry and Physiology. The researchers highlight risks to nematodes from imidacloprid exposure in maize soil, as well as potential resistance mechanisms that impact not only nematode populations but also overall soil health. Maize, or corn, a productive crop grown worldwide, is a source of food and biofuel. In assessing the soil and species in maize fields after exposure to imidacloprid at various concentrations, the study researchers assess the impact of neonicotinoid insecticides on nontarget organisms and the health of soil communities. The assessment includes an evaluation of nematodes’ survival, growth, reproduction, and chemotaxis/locomotion behavior. With a statistical analysis of lipid and lipofuscin accumulation, acetylcholinesterase (an enzyme necessary for neurotransmission) activity, and gene expression levels, the study results show that imidacloprid induces: significantly reduced abundance and diversity of nematode species. negative effects on body length, reproduction, locomotion, lipid accumulation, lipofuscin accumulation, and acetylcholinesterase activity in Caenorhabditis elegans ( elegans). the upregulation of gpa-1, cyp-35a2, fat-2, fat-6, hsp-16.41, and hsp-16.2, along with the downregulation […]

(Beyond Pesticides, November 5, 2024) Published in the journal Frontiers in Toxicology, a recent study uncovers serious flaws in the pesticide registration process at the U.S. Environmental Protection Agency (EPA) with an in-depth evaluation of the agency’s failure to protect the public from the harmful effects of five neonicotinoid (neonic) insecticides—as mandated by the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) and amendments, including Food Quality Protection Act (FQPA) of 1996. This coincides with EPA’s ongoing review to renew their approval for the next 15 years (set to be announced in 2025). The report is based on the first comprehensive assessment of unpublished rodent-based Developmental Neurotoxicity (DNT) studies, conducted between 2000-2003 and submitted by pesticide manufacturers as part of the registration process. All five neonicotinoids evaluated—acetamiprid, clothianidin, imidacloprid, thiacloprid, and thiamethoxam—are associated with significant shrinkage of brain tissue at the highest dosage, according to EPA data reports (see acetamiprid, clothianidin, imidacloprid, thiacloprid, and thiamethoxam). However, with little or no data regarding the chemicals’ impacts at low and mid-level dosages, EPA has either failed to find a “No Observed Adverse Effect Level” (NOAEL) or, seemingly at random, set the NOAEL at the mid-level dosage. The evaluation suggests that perinatal exposure to […]

(Beyond Pesticides, September 18, 2024) A literature review in Trends in Analytical Chemistry analyzes scientific articles from the last ten years from around the globe that identify more than 300 pesticides in bee pollen. Bee pollen, often used as an edible dietary supplement, is not regulated for pesticide residues, which sparks concern for human exposure due to contamination with pesticides, heavy metals, metalloids, and mycotoxins. “Bee pollen is a food supplement that is receiving increasing attention for its nutraceutical and therapeutic properties. However, several uncertainties on the safety of this beekeeping product still exist. The present work addressed this issue through the critical evaluation of 61 studies, published over the 2014–2024 period,” the Spanish authors state. Bee pollen is produced by honey bees. After they forage on flowers and gather pollen on their hind legs (in pollen baskets or corbiculae) to transport back to the hive, it is moistened with nectar and salivary secretions to create bee pollen in the form of pellets. While the composition of bee pollen can vary between geographical locations with different flowers, the studies reviewed all utilize mass spectrometry to pinpoint pesticides, as well as mycotoxins (created by naturally occurring mold spores), that threaten human […]

(Beyond Pesticides, June 21, 2024) A recent review of the scientific literature, published in Science of The Total Environment, analyzes multiple species of bees on a molecular level to better understand the poisoning mechanisms that could, as the authors see it, inform chemical risk assessments with more precision. The mechanisms “implicated in the tolerance of bees to specific pesticides, and thus as determinants of insecticide sensitivity, … include metabolic detoxification, insecticide target proteins, the insect cuticle and bee gut microbiota,” the authors write. This review references more than 90 studies performed over the last 30+ years, with most being published in the last 5-10 years, as the understanding and importance of molecular determinants of bee sensitivity has emerged. Pollinators, such as bees, provide crucial ecosystem services by pollinating both wild plants and essential crops. The exposure these insects are subjected to threatens their existence, which occurs through pesticide contamination that can lead to impacts on growth and development or even colony collapse.    “While bees have only been exposed to human-made pesticides over the recent past (last 80 years) they have co-evolved with plants and fungi which produce a range of xenobiotics, including plant allelochemicals and mycotoxins,” the authors state. […]

(Beyond Pesticides, June 12, 2024) A study of pesticide contaminated algae finds that the disruption of algal communities has a devastating effect on the health of the aquatic food web. The study findings show that contact with pesticides can result in changes to “algal physiology, causing tissue injury, developmental delay, genotoxicity, procreative disruption, and tissue biomagnification” that alters the dominance of algae species in the environment. This in turn “can impact higher trophic levels and have a domino effect on the aquatic food web. It is possible for biodiversity to disappear, reducing ecosystem stability and resistance to environmental alterations,” the authors state. The study, a worldwide literature review conducted by researchers from India, South Korea, and Saudi Arabia, appears in Aquatic Toxicology.  The health of aquatic ecosystems is at risk with indirect effects on nontarget species from pesticides in the environment. This includes impacts on species of fish, invertebrates, microbial communities, and marine mammals. In explaining the importance of extensively studying effects of pesticides, the researchers note, “Different pesticide classes have different chemical structures, which define their modes of action and affect how they interact with both target and nontarget organisms.” Because of this, the range of effects seen from […]

(Beyond Pesticides, May 16, 2024) In a recent study at the Institute of Biochemistry and Molecular Biology at Ulm University in Germany, published in Current Research in Toxicology, scientists exposed embryos of South African clawed frogs (Xenopus laevis) to three neonicotinoids (NEOs), which led to developmental effects down to a molecular level. These frogs are a well-established model species often used in ecotoxicology studies as bioindicators for overall environmental and ecosystem health. When amphibian species like Xenopus laevis are exposed to contaminants in the water, it leads to negative impacts in the food chain and harms biodiversity. The study concludes that exposure to NEOs directly or through contaminated water leaves entire ecosystems vulnerable.    The NEOs that the embryos were subjected to include imidacloprid (IMD), thiamethoxam (TMX), and its metabolite clothianidin (CLO). NEOs are a class of insecticides that target the central nervous system of insects and lead to death. These insecticides pose a potential hazard to nontarget organisms, such as animals and humans, since they are persistent in the environment and “are found in natural waters as well as in tap water and human urine in regions where NEOs are widely used,” this study states. The authors continue by […]

(Beyond Pesticides, April 11, 2024) Scientists are moving forward in testing an agroecological method of “push-pull” pest management (reducing the attractiveness of the target organism and luring pest insects towards a trap) to fight the Asian citrus psyllid (ACP) in Florida orange groves, as it spreads a plant disease known as the pathogenic bacteria huanglongbing (HLB), also known as citrus greening, which is deadly to citrus trees. The disease is spread by the pathogenic bacteria Candidatus Liberibacter asiaticus (CLas).  The chemical-intensive, or conventional, citrus industry is under intense pressure to find alternatives, as synthetic antibiotic use for this purpose has been successfully challenged in court. ACP is the carrier, or vector, for HLB, spreading it through the citrus groves and killing the trees. The chemical-intensive industry has focused on using antibiotics, which the environmental and public health community has rejected because of serious medical concerns associated with life-threatening bacterial resistance to antibiotics used to protect humans. A federal district court decision in December 2023 found illegal the U.S. Environmental Protection Agency’s (EPA) decision to register the antibiotic streptomycin in Florida citrus without adequate review of its impact on endangered species. The streptomycin lawsuit, filed in 2021 by a coalition of […]

(Beyond Pesticides, March 15, 2024) Toxic pesticides harm all beings and ecosystems, including coral reefs. Large benthic foraminifera (LBF) are single-celled organisms found on reefs that face adverse metabolic impacts after exposure to the weed killer glyphosate and insecticide imidacloprid, according to a study published in Marine Pollution Bulletin. The study found that “even the lowest doses of the fungicide and herbicide caused irreparable damage to the foraminifera and their symbionts.” Beyond Pesticides reiterates our mission of banning toxic petrochemical pesticides by 2032 and that this goal applies to land and water exposure to pesticides. LBFs are typically used as bioindicators for coral health because they are found in substantial quantities and gathering data is not intrusive or damaging to reef health. Researchers in this study screened three different herbicides (one insecticide, one fungicide, and one herbicide) at three different concentration levels. The experiments were performed in six well-samples, each with 10mL of filtered artificial seawater and a singular LBF. The control plates are artificial seawater and the experimental plates include artificial seawater with the addition of three pesticides (imidacloprid, glyphosate, and tebuconazole). Each pesticide was applied at low, medium, and high doses to measure the direct impacts of each […]

(Beyond Pesticides, March 11, 2024) Inside a recent disagreement between the Office of the Inspector (OIG) and the U.S. Environmental Protection Agency’s (EPA) Office of Pesticide Programs (OPP) on the agency’s review of pet flea and tick collars—leading to thousands of deaths and poisonings—is a basic question of the adequacy of pesticide regulation. The disagreement is over the cause of 105,354 incident reports, including 3,000 pet deaths and nearly 900 reports of human injury, and the February 2025 OIG report’s conclusion that “[EPA] has not provided assurance that they can be used without posing unreasonable adverse effects to the environment, including pets.” While the disagreement focuses on a number of EPA process failures, Beyond Pesticides urges that the findings advance the need for the agency to address a key element of chemical mixtures in pesticide products not currently evaluated, potential synergistic effects—the increased toxic potency created by pesticide and chemical combinations not captured by assessing product ingredients individually.  Key to the dispute is what many see as a foundational failure of EPA to evaluate the effect of pesticide mixtures and full formulations of pesticide end products, a longstanding criticism of the agency’s pesticide registration process, which focuses on pesticide products’ active […]

(Beyond Pesticides, March 6, 2024) With over 2,500 pet deaths and 900 reports of adverse effects to people, an Office of Inspector General (OIG) report, published on February 29, 2024, reveals multiple systemic failures by the U.S. Environmental Protection Agency’s (EPA) Office of Pesticide Programs (OPP), citing inadequate safety reviews of Seresto pet collars. The report, The EPA Needs to Determine Whether Seresto Pet Collars Pose an Unreasonable Risk to Pet Health, concludes, “The EPA’s response to reported pesticide incidents involving Seresto pet collars has not provided assurance that they can be used without posing unreasonable adverse effects to the environment, including pets.” At the time the animal effects made headlines in 2021, the agency defended the product’s registration, telling the media that, despite these incidents, EPA deemed Seresto collars “‘eligible for continued registration’ based on best available science, including incident data… No pesticide is completely without harm, but EPA ensures that there are measures on the product label that reduce risk.” Despite the scathing criticism, EPA maintains the position that it conducted an adequate review of the two active insecticide ingredients in the pet collars—the neurotoxic insecticide flumethrin, and the notorious neonicotinoid imidacloprid—proven to have adverse effects on the endocrine system as […]

(Beyond Pesticides, January 25, 2024) Legislative efforts to curtail some life-threatening pesticides associated with birds and bees (and other pollinators) decline were weakened in New York State at the end of December 2023 as the governor negotiated and stripped elements of a bill relating to agriculture that had passed the legislature—again illustrating the grip of the agrichemical industry on public policy intended to begin to address the crisis in ecosystem collapse. (See “Study Cites Insect Extinction and Ecological Collapse.”) In passing the Birds and Bees Protection Act, New York joined New Jersey, Nevada, and Maine in banning most nonagricultural uses of neonicotinoid (neonic) insecticides, but, in last-minute changes to avoid the governor’s veto, failed to phase out corn, soybean, and wheat seeds coated with these chemicals. [Pointing to an exemption in federal law that has been challenged by advocates, the U.S. Environmental Protection Agency (EPA) does not regulate treated or coated seeds as pesticides despite their toxic pesticidal properties.] In New York State, the governor can, in consultation with the leadership of the legislative branch, negotiate language changes (called Chapter Amendments) in legislature-passed legislation (originally enacted) before deciding to sign it into law or can simply choose to veto the legislation. […]

(Beyond Pesticides, December 8, 2023) Nine pesticides have been found in nearly 40% of nonorganic conventional baby foods tested, according to a study conducted by Environmental Working Group (EWG). The study found no residues of the pesticides studied in a sample of certified organic baby food. While the study finds no traces of the highly neurotoxic insecticide chlorpyrifos, associated with brain damage in children, the chemical has been allowed back on the agricultural market after being removed in 2021—raising an alarm for parents who purchase baby food with ingredients grown in chemical-intensive (“conventional”) agriculture. In November 2023, a three-judge panel of the Eighth Circuit Court of Appeals reversed a 2021 U.S. Environmental Protection Agency (EPA) decision to ban chlorpyrifos’ agricultural uses, which came after a 2021 Ninth Circuit Court of Appeals decision found that the agency’s inaction violated federal pesticide law. Because of its neurotoxic effects on children, EPA had in 2000 negotiated Dow Chemical’s voluntary cancellation of most residential uses of the chemical, but left virtually all of the chemical’s agricultural uses in place. While the EWG study focuses on pesticide residues in food and the hazards associated with ingestion of dangerous chemicals, raising alarms, purchasing baby food processed with nonorganic […]

(Beyond Pesticides, October 17, 2023) In the past month, Paris, France has witnessed a surge in bed bug populations. From public transportation to hotels, hostels, and movie theatres, bed bugs are posing a threat to the city’s two million residents and potentially a broader global population as the infestation spreads.   This resurgence of bed bugs in Paris is not unique. For centuries, these pests have been both adaptable and persistent, presenting an enduring challenge to pest control. However, the current surge in bed bug infestations is not merely a revival of a longstanding problem; it is a complex issue intertwined with the development of resistance to insecticides, mainly through a mechanism known as knockdown resistance. This mechanism, along with three other main resistance mechanisms, has enabled these insects to defy chemical-intensive control methods  Knockdown resistance is a significant factor contributing to the resistance exhibited by bed bugs to insecticides, especially pyrethroids. The mechanism plays a central role in countering the action of these insecticides, which target the nervous system of bed bugs, causing paralysis and eventual death. Knockdown resistance provides the genetic adaptation that provides bed bug populations with resistance to insecticides. It inhibits the effectiveness of certain insecticides. Bed […]

(Beyond Pesticides, September 19, 2023) Farmworkers in Paarl, South Africa took to the streets on Friday, September 8, demanding an end to the indiscriminate importation and use of pesticides, herbicides, and fungicides containing substances prohibited by the European Union (EU). This protest is part of a broader global trend of outcry against systemic issues of environmental racism that disproportionately burden communities with environmental and health risks.   Organized by the Women on Farms Project, the protesters marched to the headquarters of Bayer. The German pharmaceutical, biotechnology, and pesticide company, responsible for producing and exporting agrochemicals known to be toxic to ecosystem and human health, has previously faced multiple lawsuits, including a multimillion-dollar one linking their glyphosate weed killer products (Roundup®) to non-Hodgkin Lymphoma. At the Bayer office, the protesters presented a memorandum demanding an end to the importation and use of EU-prohibited substances.    Protesters sought to expose the hypocritical tactics European agrochemical companies use to sell products in developing nations, even when those products are deemed unsafe in their home countries. Numerous farmworkers, like victim-turned-activist Antie Dina, spoke out about their health issues from petrochemical exposure. In her talk, Dina emphasizes that, “… enough is enough, we do not want any […]

(Beyond Pesticides, February 14, 2023) The waterways that flow into the Great Lakes are experiencing year-round pesticide contamination that exceeds benchmarks meant to protect aquatic life, according to research published in Environmental Toxicology and Chemistry by scientists at the U.S. Geological Survey (USGS). “What you use makes it into the water,” study coauthor Sam Oliver, PhD, told the Milwaukee Journal Sentinel. These data buttress growing calls from pesticide reform advocates that new laws are needed to protect the nation’s increasingly threatened waters. USGS scientists conducted their analysis on 16 tributaries that feed into the Great Lakes, including sites that correspond to urban, agricultural, and undeveloped land. Samples were taken at locations closest to the lake the tributary flowed into over a period of roughly one year from October 2015 to September 2016. Each sample was tested for 231 pesticides and their breakdown products. Researchers used aquatic life benchmarks set by the U.S. Environmental Protection Agency (EPA), and created a relative hazard index (RHI) for the study to evaluate whether specific sites should be prioritized for further protections.   Across every sampled tributary, pesticides were found. Accordingly, 96% (190 out of 198) of samples taken contained pesticides or their breakdown products. […]

(Beyond Pesticides, January 11, 2022) Neonicotinoid insecticides can have detrimental effects on liver health, according to research published in the Journal of Hazardous Materials. While this is the first study to investigate how these chemicals harm the liver, there is increasing evidence that neonicotinoids, otherwise notorious for their effects on pollinators and aquatic life, can cause direct harm to human health. As the U.S. Environmental Protection Agency (EPA) continues to protect the pesticide industry from any measure of meaningful regulation around these hazardous products, the job falls to advocates to place pressure on elected officials to make the changes necessary to safeguard long-term health and well-being. Scientists postulated that neonicotinoids are neither metabolized by the liver nor excreted by urine. To test that hypothesis, 201 individuals from a hospital in China were enrolled into a study. Of the enrolled,  81 were cancer patients, and 120 were not. These individuals underwent a procedure called endoscopic retrograde cholangiopancreatography whereby samples of their bile, a fluid produced in the liver, were retrieved and analyzed. Researchers also performed a series of blood tests, measuring a range of biomarkers, including cholesterol, bilirubin, bile acids, white blood cells, platelets, and others. Lastly, scientists determined the amount […]

(Beyond Pesticides, November 15, 2022) Spraying a flowering plant with synthetic fertilizers makes it less attractive to bumblebees, according to research published this month in PNAS Nexus.  “A big issue is thus—agrochemical application can distort floral cues and modify behaviour in pollinators like bees,” said study author Ellard Hunting, PhD, of the University of Bristol, UK. The findings underscore the limited understanding that proponents of chemical agriculture have for the complex processes that food production relies upon and reinforce calls for a broad scale transition to regenerative, organic farming practices. Scientists began with the knowledge that spray applications of various agrichemicals affect the visitation patterns of bumblebees and other pollinators through a range of different processes. Past research finds that notorious bee-killing neonicotinoid insecticides not only kill bees outright, but also result in a range of complex damage, including their ability to impede bees’ olfactory senses and adversely affect their vision and flying ability. Other chemicals like glyphosate weaken bees’ ability to distinguish between colors.   A growing area of research is investigating the ways in which pollinators use static electric fields surrounding flowers to find food sources. A 2013 study found that bumblebees use floral electrical fields to discriminate […]

(Beyond Pesticides, October 6, 2022) A new study finds alarmingly high levels of PFAS (Per- and Polyfluoroalkyl Substances) “forever chemicals” in commonly used pesticides, calling into question assurances from the U.S. Environmental Protection Agency (EPA) that contamination is limited to storage containers. For some pesticides, PFAS levels are nearly one billion times higher than the EPA’s recently updated Health Advisory for the PFAS chemical PFOS. “If the intent was to spread PFAS contamination across the globe there would be few more effective methods than lacing pesticides with PFAS,” said Kyla Bennett, PhD, of the nonprofit Public Employees for Environmental Responsibility. “These findings point to an appalling regulatory breakdown by EPA.” A team of researchers based in Texas, including scientists from Texas Tech and the U.S. Department of Agriculture’s (USDA) Cropping Systems Research Laboratory, participated in the study published in the Journal of Hazardous Materials Letters. Ten different formulated pesticide products were tested for 24 different PFAS substances. The pesticide products selected were determined based on unexpected PFAS contamination at USDA’s research facility. During the course of conducting a separate study on plant uptake of PFAS, detectable levels of PFAS were found in plants intended to be used as unexposed controls. […]

(Beyond Pesticides, September 27, 2022) Exposure to widely used neonicotinoid insecticides harms amphibians at multiple life stages, adversely affecting their ability to survive in the wild, according to research published in the Journal of Zoology. As long-lived, systemic insecticides, neonicotinoids are consistently found in U.S. waterways,  often above federal safety limits, making these findings particularly dangerous for frogs and other amphibians throughout the country. As troubling data piles up on this class of dangerous insecticides, which are damaging pollinators, birds, deer, aquatic wildlife, and human health, it is left to the public to place pressure on federal regulators and members of Congress to act. To understand the impact of neonicotinoids on amphibian life stages, researchers conducted a range of  experiments. These were designed to investigate how exposure to the neonicotinoid imidacloprid affected larval survival, sexual development, locomotor skills, and avoidance behavior of the wood frog (Rana sylvatica). Larval survival was examined by exposing tadpoles to 10 parts per billion (ppb) of imidacloprid, a rate lower than the lethal concentration expected to kill half of other frogs species in acute toxicity tests. Four treatment protocols were established, adding the variable of natural pond drying to half of the tested frogs to […]