(Beyond Pesticides, November 19, 2015) French scientists say that they have found the “missing link” between laboratory studies and field studies that assess the adverse effects of neonicotinoid (neonic) insecticides on bees. The study, published in Royal Society Journal Proceedings B, evaluates the effects of neonics on honey bees in field trials. After 15 years of research into the effects of neonicotinoids on bees, researchers had identified a gap between the results of toxicity assessments on individual bees in the laboratory and  impacts seen at the colony level in the field. The new two-year study made two discoveries: First, they found that field exposure to thiamethoxam combined with imidacloprid contamination is associated with a significant excess mortality in individual free-ranging bees.  Second, while colonies appeared to be able to compensate for the excess mortality and preserve population size and honey production, this was done at the expense of a change in brood laying patterns. Thus, this study provides an explanation for the “missing link” in the discrepancies between labs studies and field studies, where the former establishes harmful and fatal effects that had yet to be replicated in real-life conditions. Because the bees responded to the increased mortality with selective […]

(Beyond Pesticides, November 18, 2015) Last week, the European Union’s (EU) European Food Safety Agency (EFSA) announced its determination that the popular herbicide glyphosate is “unlikely to pose a carcinogenic hazard to humans.” This is in direct contrast with findings released  earlier this year by  the World Health Organization’s (WHO) International Agency for Research on Cancer (IARC), which classified glyphosate a ”˜probable carcinogen.’  However, these seemingly conflicting conclusions from these premier scientific agencies are put into perspective by knowing that EFSA’s report is limited in that it reviewed glyphosate alone, unlike IARC which reviewed glyphosate and its formulated products (Monsanto’s Roundup) which are more relevant for evaluating risks to human health. In light of the March 2015 IARC findings —listing glyphosate as a probable carcinogen due to  sufficient evidence of carcinogenicity  based on laboratory studies, the European Commission requested EFSA consider glyphosate’s potential carcinogenicity. In its report released November 12, 2015, EFSA concludes that “glyphosate is unlikely to pose a carcinogenic hazard to humans and the evidence does not support classification with regard to its carcinogenic potential..” However, the agency notes that there are “several reasons explaining the diverging views” from IARC’s earlier conclusion. The most important difference is that […]

(Beyond Pesticides November 4, 2015) On Monday, the Center for Biological Diversity, the Center for Environmental Health, El Quinto Sol de America, Californians for Pesticide Reform, the Center for Food Safety and the Pesticide Action Network released a report with findings that that more than half of the commercial glyphosate sprayed in California is applied in the state’s eight most impoverished counties. Glyphosate is a phosphanoglycine herbicide that inhibits an enzyme essential to plant growth.  Commonly known as Roundup, glyphosate is classified as a probable carcinogen by the World Health Organization’s International Agency for the Research of Cancer (IARC), based on sufficient evidence of carcinogenicity in experimental animals, and is currently under review to receive a similar designation from the state under California’s Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). The report,  Lost in the Mist:  How Glyphosate Use Disproportionately Threatens California’s Most Impoverished Counties, found that 54 percent of glyphosate spraying in California is applied in eight counties, many of which are located in the southern part of the Central Valley. The analysis finds that the populations in these counties are predominantly Hispanic or Latino, indicating that glyphosate use in California is distributed unequally along […]

(Beyond Pesticides, November 3, 2015) The U.S. Environmental Protection Agency (EPA) is proposing to revoke all food tolerances for the organophosphate insecticide chlorpyrifos (also known as Dursban), a neurotoxic pesticide produced by Dow AgroSciences that poses particular risks to children and farmworkers. If EPA’s rule is finalized, chlorpyrifos would be effectively eliminated from use in agriculture 15 years after consumer uses were discontinued. However, other non-food uses, including golf courses, turf, green house and mosquito control are not affected by this decision and will remain. EPA’s proposed rule came on the day of a court-ordered deadline from the U.S. Court of Appeals Judge for the Ninth Circuit, M. Margaret McKeown. In August of this year, Judge McKeown ordered EPA to respond to a petition filed by Pesticide Action Network North America and the Natural Resources Defense Council nearly nine years ago. The lawsuit called on the agency to ban all uses of the insecticide in light of scientific evidence and public comments ignored by the agency after its cumulative risk assessment for organophosphate insecticides. In 2012, EPA imposed “no-spray” buffer zones around public spaces, including recreational areas, schools, and homes to reduce bystander exposure risks. Earlier this year, the agency […]

(Beyond Pesticides, November 2, 2015) The Center for Biological Diversity (CBD) submitted a formal notice last week for intent to sue the Environmental Protection Agency (EPA) for approving benzovindiflupyr, a fungicide that is highly toxic to fish and aquatic invertebrates. CBD asserts that EPA recognized that benzovindiflupyr could harm wildlife and critical habitat protected by the Endangered Species Act (ESA), but approved it for use without consulting with expert wildlife agencies as required by the act. This is  not the first time that EPA has approved toxic chemicals without fully understanding the consequences. On August 28, 2015, EPA granted broad approval for use of benzovindiflupyr on most crops, including cereals, corn, vegetables, fruits, turf grass and ornamentals. The agency’s own data show that benzovindiflupyr is highly persistent in the environment and will build up in waterways due to runoff from treated fields. Nonetheless, EPA approved benzovindiflupyr for immediate use. “This pesticide is highly poisonous to fish and other wildlife, but the EPA approved it anyway,” said Stephanie Parent, senior attorney at the Center for Biological Diversity, in their press release. “This agency’s cavalier approach to approving new toxic chemicals without required consultation or studies must end. The EPA’s indifference is […]

(Beyond Pesticides, October 28, 2015) On the heels of a recent federal court decision that rejected the U.S. registration of sulfoxaflor, which cited inadequate and flawed review of the science on the chemical’s toxicity to bees, European beekeepers filed complaint that that asks the European Court of Justice to take the same action. The complaint  asks the court to cancel sulfoxaflor’s authorization. Sulfoxaflor is a neonicotinoid-like chemical that, like neonicotinoids, is highly toxic to bees. Three of the most widely used neonicotinoids are currently under a two-year European-wide moratorium which began December 2013, due to concerns about risks to bee populations. European beekeepers, Bee Life European Beekeeping Coordination, the Italian National Beekeeping Union (UNAAPI), and PAN Europe, filed the complaint which cites a published  negative opinion on Dow AgroScience’s sulfoxaflor by the European Food Safety Authority (EFSA). According to EFSA, the pesticide is categorized as ”˜highly toxic to bees’ and it identified crucial toxicity data gaps, which according to the beekeepers, makes a proper risk assessment for bees impossible. Despite these facts, the European Commission’s Directorate-General for Health and Food Safety (DG Sante) and the EU member states authorized sulfoxaflor in July 2015, completely bypassing the pesticide regulation, the complaint […]

(Beyond Pesticides, October 27, 2015) Late Friday,  a coalition of public health, conservation and food safety groups filed their opening brief in the ongoing legal challenge to the U.S. Environmental Protection Agency’s (EPA) approval of the herbicide Enlist Duo for use on genetically engineered corn and soybeans. Enlist Duo, a blend of glyphosate and 2,4-D, was approved on October 15 for use on genetically engineered (GE) crops, despite concerns for human and environmental contamination. The challenge was originally brought in November 2014, shortly after the EPA approved the controversial herbicide for 6 Midwest states. Since then, EPA has expanded its approval to a total of 15 states, with more expected. Counsel from the Center for Food Safety (CFS) and Earthjustice are jointly representing Beyond Pesticides, Center for Biological Diversity, CFS, the Environmental Working Group, the National Family Farm Coalition, and Pesticide Action Network North America. “The Enlist Duo approval violated the laws protecting our communities, land, and farms,” said George Kimbrell, Center for Food Safety senior attorney, counsel in the case. “Regulators bowed to the chemical industry, but we are committed to holding them accountable.” The groups argue that in its approval of Enlist Duo, a combination of the herbicides […]

(Beyond Pesticides, October 20, 2015) Exposure to neonicotinoid (neonic) pesticides results in profound negative impacts to the health of honey bee queens, according to an international team of researchers led by Geoff Williams, MD, PhD, at the University of Bern in Switzerland. While most studies to date have investigated how neonics effect the health of individual workers or overall colony fitness, Dr. William’s study, Neonicotinoid pesticides severely affect honey bee queens, is one of the first to focus on the health of honey bee queens. Neither the European Union nor U.S. Environmental Protection Agency (EPA) study the impacts of pesticides on queen health before allowing a pesticide to market. The results of this research are particularly concerning, given widespread anecdotal evidence from beekeepers across the globe that ”˜poor quality queens’ are playing a role in bee declines. To test the impacts of these chemicals on queen honey bees, scientists exposed a sample of 29 queens to field-realistic levels of the neonics  clothianidian and thiamethoxam (1 parts per billion and 4 ppb respectively), and compared them to a population of 28 control queens, which were not treated with neonics. Both groups experienced similar environmental circumstances in terms of food availability, rearing […]

(Beyond Pesticides, October 19, 2015) Monsanto, the major producer of Roundup (glyphosate), has found itself in hot water recently, as personal injury lawsuits pile up over the link between glyphosate exposure and non-Hodgkin’s Lymphoma (NHL). Personal injury law firms around the U.S. have found a multitude of plaintiffs and are preparing for what could be a “mass tort” action against Monsanto for knowingly misinforming the public and farmworkers about the dangers of the chemical. The latest lawsuit was filed October 14 in Delaware Superior Court by three law firms representing three plaintiffs. One plaintiff in the Delaware lawsuit, Joselin Barrera, 24, a child of migrant farmworkers, relates  her non-Hodgkin lymphoma (NHL) to glyphosate exposure. Elias de la Garza, a former migrant farm worker and landscaper diagnosed with NHL, has a similar claim. These follow other lawsuits filed last month in New York and California that  accuse Monsanto of knowing that glyphosate was hazardous to human health. Monsanto “led a prolonged campaign of misinformation to convince government agencies, farmers and the general population that Roundup was safe,” the lawsuit states. Glyphosate is touted as a “low toxicity” chemical and “safer” than other chemicals by the Environmental Protection Agency (EPA) and industry […]

(Beyond Pesticides, October 9, 2015) Last week, the Environmental Protection Agency (EPA) released preliminary human health and ecological risk assessments for seven organophosphate pesticides (OPs) and announced the public open comment period for those chemicals. These risk assessments come as a result of the required periodic registration review, as required by  the Federal Insecticide, Fungicides, and Rodenticide Act. In general, OPs are highly toxic and many have been voluntarily removed from the market, considerably restricted, or denied reregistration. Unfortunately, EPA continues to rely on risk mitigation for individual OPs instead of phasing them out altogether. Seven OPs ­ ­—dimethoate, dictrotophos, chloyrophos-methyl, tribufos, terbufos, profenofors, and ethoprop—are among the first wave of chemicals whose preliminary risk assessments have been completed under the registration review program. Each of these was found by EPA to inhibit the enzyme acetylcholine esterase (AchE), which ultimately leads to neurotoxic  central nervous system effects. This information is not new, however. In 2012, University College London found long-term low-level exposure to OPs produces lasting damage to neurological and cognitive functions. In 2013, at least 25 children died after eating school lunches contaminated by OPs. One OP in particular, chlorpyrifos, chlorpyrifos (Dursban), is currently under petition for the same […]

(Beyond Pesticides, October 6, 2015) Last week, the International Federation of Gynecology and Obstetrics (FIGO) released a statement encouraging broad-based policy measures that prevent exposure to toxic environmental chemicals. “The global health and economic burden related to toxic environmental chemicals is in excess of millions of deaths and billions of dollars every year,” the report unequivocally states. FIGO’s statement follows a similar call to action from the American College of Obstetricians and Gynecologists in 2013 and the American Academy of Pediatrics in 2012. The piece lays out broad themes surrounding exposure to toxic chemicals, including issues of environmental justice, prenatal exposure and subsequent health effects, and overall global health and economic burden. Based on these impacts, several recommendations are submitted for obstetricians, gynecologists, midwives, women’s health nurse practitioners, nurses, and other health professionals to follow to achieve a goal of “prevention for all.” FIGO highlights how people of low-income, particularly in poverty-stricken countries, bare a higher burden of toxic exposure than richer nations. “[A]t every stage of development, the consequences of exposure to toxic chemicals —including morbidity and mortality, loss of family income and productivity, and environmental degradation— are disproportionately borne by people with low incomes,” the piece states. FIGO […]

(Beyond Pesticides, October 05, 2015) According to a Yale University study, prenatal exposure to the widely used agricultural pesticide chlorpyrifos is linked to tremors — involuntary contraction or twitching of muscles — in childhood. Chlorpyrifos, a broad-spectrum chlorinated organophosphate insecticide also known as Dursban, may also affect the cardiovascular and respiratory systems and is acutely toxic to bees, birds, mammals, and aquatic life. The study, titled Prenatal exposure to the organophosphate pesticide chlorpyrifos and childhood tremor  and published in the journal Neurotoxicology, measured the presence of chlorpyrifos in umbilical cord blood samples in 263 low-income, inner-city minority children. In 2001, the U.S. Environmental Protection Agency (EPA) banned residential use of chlorpyrifos, which was prominent in urban areas at the time. However, the study participants  —263 minority mothers  and their children, all from low income  communities in New York  City— were assembled in 1997,  before the ban was imposed. In  1997, the initial measure of each  child’s prenatal exposure to CPF  was taken from umbilical cord  blood. The children were then followed until approximately 11 years of age, after which they underwent a neurophysical assessment, which included a short drawing test. Researchers found that compared to all other children, those who […]

(Beyond Pesticides, September 22, 2015) A meta-analysis presented at the annual meeting of the European Association for the Study of Diabetes in Sweden concludes that exposure to pesticides is associated with an increased risk of diabetes. Although diabetes is long-suspected as involving an interplay between genetics and environmental factors, emerging research is revealing that contaminants like pesticides may play an important role in the pathogenesis of the disease. These findings add to a growing body of evidence demonstrating that pesticides play a key role in the development of a wide range of all-too-common diseases in the 21st century. To assess the association between pesticide exposure and diabetes, the recent research, Association between diabetes and exposure to pesticides: a systematic review and meta-analysis, examine 21 relevant studies comprising over 66,000 people. Most studies determined pesticide exposure through urinary or blood biomarker analysis, a highly reliable method of testing body burden. Exposure to any pesticide is linked to a 61% increase in diabetes. When looking specifically at type 2 diabetes, researchers found similar results, with any pesticide exposure increasing risk of developing the disease by 64%. However, researchers found that, although on the whole pesticides increased the chance of any diabetes diagnosis, […]

(Beyond Pesticides, September 18, 2015) Glyphosate’s harmful effects continue to accumulate, this time with evidence pointing to toxic and sublethal effects on bees. According to a new study conducted by German and Argentinian researchers, honey bees exposed to low levels of glyphosate have a hard time returning home. Glyphosate, the  controversial and toxic active ingredient in Monsanto’s Roundup, is an herbicide widely used on genetically-engineered (GE) crops as well as on parks and golf courses, for control of weeds and grasses. Along with neonicotinoids, which have been linked to worldwide bee decline by a growing body of science, glyphosate is just another chemical in the toxic mixture that bees and other non-target organisms are constantly exposed to in the environment. In the study, titled “Effects of sublethal doses of glyphosate on honeybee navigation” and published in the Journal of Experimental Biology, researchers evaluate the effects of recommended concentrations of glyphosate used in agricultural settings on honey bee navigation and found that a single exposure to a concentration of glyphosate within this range delays the return of the foraging honey bee to the hive. Flight trajectories were also affected after successive exposure to the herbicide, suggesting that the spatial learning process […]

(Beyond Pesticides, September 16, 2015) In a letter posted to the federal docket, the U.S. Department of Agriculture (USDA) states that it is opposed to U.S. Environmental Protection Agency’s (EPA) recent proposal to restrict pesticides highly toxic to bees on sites where managed bees are present, saying the measure “has not established the need for such a prohibition.” In its position, USDA  cites economic impacts to farmers and lack of a cost/benefit analysis. USDA’s critique of EPA’s proposal contrasts with a decision handed down last week by a federal court that ruled EPA should not ignore risk concerns for bees and rejected the registration of a pesticide known to be highly toxic to bees, highlighting a lack of collaboration and understanding between federal agencies in advancing  pollinator protection. USDA communicated its challenge to EPA despite the growing body of science on the hazards of neonicotinoid insecticides and findings in Europe that their restriction does not undermine crop productivity. Last May,  EPA announced a new proposal  to temporarily prohibit foliar applications of pesticides that are acutely toxic to bees during plant bloom and when managed bees are on site and under contract. The proposal received a mixed response, with many from […]

(Beyond Pesticides, September 11, 2015) On Thursday, the Ninth Circuit Court of Appeals unequivocally rejected the U.S. Environmental Protection Agency’s (EPA) unconditional registration of the systemic and bee-toxic pesticide sulfoxaflor. The Court concluded that EPA violated federal law and its own regulations when it approved sulfoxaflor without reliable studies regarding the impact that the insecticide would have on honey bee colonies. The Court vacated EPA’s unconditional registration of the chemical, meaning that sulfoxaflor may no longer be used in the U.S. However, while the decision is good news for now, it still leaves the door open for sulfoxaflor’s future use once EPA obtains the necessary information regarding impacts to honey bees and re-approves the insecticide in accordance with law. The case is Pollinator Stewardship Council, American Honey Producers Association, National Honey Bee Advisory Board, American Beekeeping Federation, Thomas Smith, Bret Adee, Jeff Anderson v. U.S. EPA (9th Circuit U.S. Court of Appeals,  No. 13-7234). Dow AgroSciences (a Dow Chemical company)  joined  the case as an intervenor to support EPA. EPA initially proposed to conditionally register sulfoxaflor and requested additional studies to address gaps in the data regarding the pesticide’s effects on bees. A few months later, however, EPA unconditionally registered […]

(Beyond Pesticides, September 10, 2015) Last week, California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment (OEHHA) announced that it intended to list glyphosate (Roundup) and three other chemicals as cancer-causing chemicals under California’s  Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). Glyphosate  is a phosphanoglycine herbicide that inhibits an enzyme essential to plant growth. Under California law, Proposition 65 requires that certain substances identified by the International View postAgency for Research on Cancer (IARC) be listed as known cancer-causing chemicals. In March, a study by the IARC classified glyphosate as a Group 2A material, which means that the chemical is carcinogenic based on sufficient evidence of carcinogenicity in experimental animals. The agency considered the findings from an EPA Scientific Advisory Panel report, along with several recent studies in making its conclusion. However, industry supporters of glyphosate all over the globe are conducting their own studies to attempt to prove that it is not a carcinogen. These studies, like one by German Federal Institute for Risk Assessments (BfR), are based almost solely on industry science and classified industry reports, each of which might not consider critical variables. With more glyphosate-focused studies being released, the growing evidence […]

(Beyond Pesticides September 9, 2015) A young Florida boy and his family are reeling after a routine termite treatment resulted in a devastating outcome. Ten-year-old Peyton McCaughey of Palm City, Florida has been in the hospital for weeks following a severe reaction to chemicals used to fumigate his family’s home. According to news reports, the  fumigation was performed by Sunland Pest Control, a subcontractor of Terminix. The Florida Department of Agriculture has since issued a “Stop Work Order” while it  investigates the company in collaboration with the Environmental Protection Agency (EPA) and the state Department of Health. After returning to their home hours after the Terminix subcontractor told them it was safe to enter, the whole family became very ill. While the parents and the 7-year-old daughter recovered, the young boy’s condition continued to worsen. “He was having some uncontrollable muscle movements, couldn’t stand up, couldn’t speak, so they took him to a local walk-in and the doctor quickly recognized it was probably poisoning from a treatment,” said Peyton’s uncle, Ed Gribben. Current reports indicate that the boy has likely suffered brain damage and has lost all muscle control, rendering him unable to stand or speak. He remains in a […]

(Beyond Pesticides, September 4, 2015) Research into neonicotinoid insecticides, a class of bee-toxic chemicals, and their effects on bees, needs to be more comprehensive in order to better reflect their global use, concludes a recent review of the current literature. The authors of the review state that despite considerable research efforts, there are still significant knowledge gaps concerning the impacts of neonicotinoids on bees. Since 2006, honey bees and other pollinators in the U.S. and throughout the world have experienced ongoing and rapid population declines. The science has become increasingly clear that pesticides (especially the  neonicotinoid class of insecticides), either acting individually or synergistically, play a critical role in the ongoing decline of honey bees and wild pollinators. Neonicotinoids can be persistent in the environment, and have the ability to translocate into the pollen and nectar of treated plants. The systematic review, titled Neonicotinoid Insecticides and Their Impacts on Bees: A Systematic Review of Research Approaches and Identification of Knowledge Gaps  and published in the journal PLoS ONE, took a look at over 200 primary research studies in order to identify knowledge gaps. While there is a growing body of science examining the impacts of neonicotinoid use, knowledge gaps need […]

(Beyond Pesticides, August 28, 2015) The European Union’s food safety agency confirmed Wednesday that foliar spraying of neonicotinoids (neonics), the widely-used bee-toxic insecticides, poses a risk to bees, bolstering previous research that led to a two-year moratorium on the chemicals in the EU. The European Food Safety Authority (EFSA), which guides EU policymakers, said leaf spray containing three neonicotinoid pesticides — clothianidin, imidacloprid, and thiamethoxam — could harm bees. Previous research found that these chemicals pose a risk as seed treatments or granules, which prompted the European Commission to limit their use in  December 1, 2013. The use of the three neonicotinoid substances in seed or soil treatments is prohibited in the European Union for crops attractive to bees and for cereals other than winter cereals except in greenhouses. “They (the EFSA conclusions) confirm that the Commission was correct to take precautionary measures in 2013,” a Brussels-based EU executive said in a statement. Neonicotinoids have been found by  a growing body of scientific literature  to be linked to honey bee and pollinator decline. Recently, a  study  performed by the Food and Environment Research Agency (FERA) in the United Kingdom provides evidence confirming the link between neonicotinoid pesticides and continually increasing […]

(Beyond Pesticides, August 27, 2015) Last week, Philip J. Landrigan, M.D., and Charles Benbrook, Ph.D., released a perspective article, GMOs, Herbicides, and Public Health, in the New England Journal of Medicine  that outlines  the hazards associated with food residues of  elevated pesticide use in the production  of genetically engineered (GE) crops. While mainstream media continuously misses the central issue  in the GE debate by asserting that these crops are merely an extension of selective breeding and effect a reduction in pesticide use, the authors  focus on  the significance of the actual increase in herbicide use and weed resistance in herbicide-tolerant crops. Drs. Landrigan and Benbrook offer two main recommendations in their article: the U.S. Environmental Protection Agency (EPA) should delay implementation of its decision to permit the use of Enlist Duo (the 2,4-D herbicide used with  Monsanto-engineered GE herbicide-tolerant  crop), and  the U.S. Food and Drug Administration (FDA) should  require labeling of GE foods and couple it with adequately funded, long-term postmarketing surveillance. Dr. Landrigan, Dean for Global Health at Mount Sinai School of Medicine, is an epidemiologist and pediatrician and one of the world’s leading advocates of children’s and environmental health. Dr. Benbrook is a research professor at the […]

(Beyond Pesticides, August 26, 2015) A  study performed by the Food and Environment Research Agency (FERA) in the United Kingdom (UK) provides evidence of confirming the link between neonicotinoid pesticides and continually increasing honey bee colony losses on a landscape level. The study, Evidence for pollinator cost and farming benefits of neonicotinoid seed coatings on oilseed rape, was published in the Nature journal Scientific Reports. This is a significant study, as the UK government has always maintained that neonicotinoid pesticides do not threaten bees, and that honey bee losses are instead caused by the parasitic varroa mite, siding with industry arguments that pesticides are safe when used properly. However, this new study indicates otherwise, confirming a direct link between neonicotinoids and honey bee colony losses at a nationwide level. This study distinguishes itself from  a previous study in the U.S. that extrapolated real world neonicotinoid exposure levels  to  test hives by analyzing actual fields in a  long-term assessment. To a large degree, the new study addresses industry critics of the earlier study design who have tried to discount previous findings of bee decline associated with neonicotinoid use (see Beyond Pesticides’ Sowing the Seeds of Doubt, which addresses these industry myths). […]

(Beyond Pesticides, August 21, 2015) Neonicotinoid insecticides contaminate over half of urban and agricultural streams across the United States and Puerto Rico, according to a study released earlier this week by the U.S. Geographical Survey (USGS). Neonicotinoids (neonics) are bee-toxic insecticides that have been linked to the global decline in bee populations by a large body of science. The study, titled “First national-scale reconnaissance of neonicotinoid insecticides in streams across the USA” and published in Environmental Chemistry,  was conducted from 2011 to 2014 and spans 24 states and Puerto Rico. Researchers found that at least one of the six neonicotinoids tested by USGS researchers was found in more than half of the sampled streams. Detections of the  six  neonicotinoids varied:    imidacloprid  was found in 37 percent of the samples in the national study, clothianidin in 24 percent, thiamethoxam in 21 percent, dinotefuran in 13 percent, acetamiprid in 3 percent, and thiacloprid was not detected. Both urban and agricultural uses contributed to neonic concentrations in streams, with imidacloprid occurrence significantly related to the amount of urban land-use and clothianidin and thiamethoxam significantly related to the amount of cultivated crop. “In the study, neonicotinoids occurred throughout the year in urban streams […]