(Beyond Pesticides, May 28, 2020) Exposure to agricultural and industrial pesticides, solvents (thinners), electromagnetic fields, and heavy metals predispose humans to amyotrophic lateral sclerosis (ALS), according to an Italian research study, “Environmental and Occupational Risk Factors of Amyotrophic Lateral Sclerosis: A Population-Based Case-Control Study,” published in the International Journal of Environmental Research and Public Health. Although research supports ALS’s genetic etiology, epidemiologic research associating ALS risks and to environmental, or work-related risk factors (i.e., pesticide use, pollutant exposure, heavy metal exposure, etc.) has been inconsistent and non-definitive. This research demonstrates the importance of assessing aggregate health risks associated with occupational pesticide exposure, especially when determining potential exposure routes in specific occupational sectors. In the study, researchers note, “In particular, having an occupation in the agricultural sector, especially with a long duration of the working activity as well as occupational exposure to some chemicals…might increase ALS risk.” While scientists extensively study the epidemiology of amyotrophic lateral sclerosis (ALS)—a rare, yet fatal neurodegenerative disease—occupational and environmental hazards inducing random (sporadic) or hereditary ALS diagnoses remain vague. With researchers predicting a global ALS incidence increase of 69% by 2040, identifying ALS’s causal factors are important to future research. In this research, Italian researchers conducted a case-control, […]

(Beyond Pesticides, May 21, 2020) Use of the herbicide dicamba increases humans’ risk of various acute and chronic cancers, according to research published in the International Journal of Epidemiology by the National Institutes of Health (NIH). Many pesticides are “known or probable” carcinogens (cancer-causing agents), and their widespread use only amplifies chemical hazards, adversely affecting human health. However, past research lacks comprehensive information regarding human health effects associated with long-term pesticide use. This study highlights the significant role that long-term research plays in identifying potential health concerns surrounding registered pesticides, especially as the Environmental Protection Agency (EPA) plans to reaffirm its decision to allow dicamba use on genetically engineered (GE) crops. Nathan Donley, Ph.D., a scientist with the environmental health program at the Center for Biological Diversity, comments: “This sweeping study exposes the terrible human cost of the EPA’s reckless decision to expand the use of dicamba. […]For the EPA to approve widespread use of this poison across much of the country without assuring its safety to people and the environment is an absolute indictment of the agency’s persistent practice of rubber-stamping dangerous pesticides.” Dicamba—a benzoic acid chemical that controls broadleaf weeds—is one of the most widely applied herbicides in corn production. As a result of weed resistant to […]

(Beyond Pesticides, May 15, 2020) New research out of Japan’s Chiba University suggests that exposure to glyphosate, the active ingredient in the most commonly used pesticide worldwide (Roundup), may be a risk factor in the development of Parkinson’s Disease. The ubiquity of glyphosate use in agriculture — which leaves residues of the toxic chemical in food — may mean that exposures to it represent a significant risk factor for the disease. Glyphosate is already implicated or proved in the development of numerous health anomalies, including cancer. Beyond Pesticides recognizes that pesticides play a variety of roles in causing or exacerbating negative health outcomes, including Parkinson’s Disease (PD). Transitioning pest management — in agriculture, land management, and household and personal care contexts — to nontoxic and organic approaches is the critical step away from bathing humans and the Earth in harmful chemicals. The researchers in this subject study, out of the Chiba University Center for Forensic Mental Health’s Division of Clinical Neuroscience, sought to investigate whether exposures to glyphosate could impact dopaminergic neurotoxicity in the brains of mice. They found that exposures to glyphosate in adult mice intensified a type of neurotoxicity associated with PD. [The abstract for the research paper, titled […]

(Beyond Pesticides, May 14, 2020) Four banned organochlorine pesticides (OCP) are present in over 60% of a cohort of reproductive-age, black women in Detroit, according to a study published in Environmental Research by Boston University School of Public Health (BUSPH). OCPs are lipophilic (fat combining/dissolving), environmentally steadfast chemicals linked to harmful health effects. This study stresses the importance of monitoring pesticide accumulation, particularly regarding environmentally persistent chemicals and their metabolization via indirect exposure routes. Lead author Olivia Orta, Ph.D., a postdoctoral research associate in the Department of Epidemiology at BUSPH, highlights the significance of water monitoring—especially in light of historically disproportionately high hazards for people of color (e.g., Flint, Michigan)—and testing sources prone to OCP contamination. She remarks, “The sources that we identified as potential OCP correlates should be tested for pesticide contamination,[…] especially drinking water.” Environmental contaminants, like organochlorine pesticides (OCP), can persist in the environment decades after use stops, as OCPs have greater chemical stability and gradual attenuation. Minority populations are at higher exposure risk of environmental contaminants (i.e., pesticide) exposure that can catalyze adverse health and birth effects, especially in metropolitan areas. Although black women endure higher body burdens than other U.S. populations, there remains a lack of research surrounding the association. Boston University researchers enrolled […]

(Beyond Pesticides, May 13, 2020) A pilot study at New York University (NYU) provides evidence of a direct relationship between increased risk for celiac disease (adverse immune response to eating gluten) and exposure to endocrine-disrupting chemicals, including DDE – a metabolite of the infamous, bird-killing pesticide DDT. Researchers at NYU set out to elucidate the connection between the autoimmune disease and persistent organic pollutants (POPs), also known as “forever chemicals” or “legacy chemicals” due to their persistence in nature and the human body. The new research, published in Environmental Science, highlights higher odds for celiac disease among participants with elevated POPs exposure and differing results among male and female participants. Considering the complexity of these initial results, researcher Leonardo Trasande, Ph.D. says, “It’s not as if these chemicals were designed with the human body in mind; These chemicals were designed with materials in mind.” [See video overview here] Celiac disease produces an immune-mediated inflammatory response to the consumption of gluten, a protein found in wheat, rye, and barley. Risk for celiac disease has long been associated with genetic factors, but increased prevalence of the disease inspired further research. Considering previous studies on the deleterious impact of POPs on the immune […]

(Beyond Pesticides, May 12, 2020) California Governor Gavin Newsom (D) is issuing new enforcement guidelines intended to protect children and residents from toxic pesticides during the Covid-19 pandemic. With schoolchildren spending their time at home while in quarantine, many, particularly those in agricultural communities, are at increased risk of pesticide exposure. “During this public health crisis, it is important to ensure the strict enforcement and oversight of regulations that protect children from pesticide exposure,” Governor Newsom wrote in a letter to the state Environmental Protection Agency (CalEPA). While much of the guidance simply reinforces current legal requirements, it places an emphasis on strict enforcement. County Agricultural Commissioners (CACs), the state’s primary enforcement officers for pesticide laws, must “strictly enforce all applicable health protections around homes and schools” during the pandemic, seven days a week. Further, it stresses that pesticide applications “are expressly prohibited,” when there is, “reasonable possibility of contamination of the bodies or clothing of persons not involved in the application.” The state will prioritize the investigation of any violations made in residential areas. The state will also “take a strict approach to assessing penalties.” Violations of pesticide law that occur near homes or schools during coronavirus quarantine will […]

(Beyond Pesticides, May 11, 2020) Protecting ourselves from Covid-19 requires not only that we avoid contact with the virus, but also that we avoid exposing ourselves to chemicals that may disrupt our immune or respiratory systems. But when it comes to pesticide products—and disinfectants are pesticides—we encounter once again the problem of so-called “inert,” or nondisclosed, ingredients. Tell EPA and Congress that ALL Ingredients in Pesticides Must Be Disclosed. “Inert” ingredients are not necessarily chemically or biologically harmless. “Inert” or “other” ingredients—as distinguished from “active” ingredients—are generally the majority of the product formulation that makes up the liquid, spray, dust, or granule, but does not specifically attack the pest, according to the manufacturer. They include emulsifiers, solvents, carriers, aerosol propellants, fragrances, and dyes. Many “inerts” are quite toxic, and may be “active” ingredients in other products. “Inert” ingredients may also be described as “adjuvants” or “formulants.” “Inerts” are typically not listed on the label, and hence are often called “secret ingredients.” Beyond Pesticides reviews the disinfectants on EPA’s List N, which are approved for use against the novel coronavirus, but it is only possible to review the active ingredients. One product on the list, for example, contains 99.7784% “other ingredients.” Unfortunately, although this product may […]

(Beyond Pesticides, May 8, 2020) At the height of Covid-19 impacts in the Northeast U.S., Massachusetts Governor Charlie Baker (R) and Lieutenant Governor Karyn Polito (R) filed emergency legislation at the Boston State House that would, according to their April 16 press release, “help the Commonwealth more effectively combat diseases transmitted by mosquitoes, including arboviruses like Eastern Equine Encephalitis (EEE) and West Nile Virus (WNV), by authorizing a coordinated, proactive, statewide approach to mosquito control activities.” Protecting the public from such diseases is an important public health mission. However, the Governor’s bill, H.4650, represents an alarming “over-reach” that would give unitary authority to the State Reclamation and Mosquito Control Board (SRMCB) to conduct mosquito control activities, including ineffective and toxic spraying, with virtually no effective oversight or transparency. Beyond Pesticides opposes this bill, whose passage would enable use of pesticides that can have respiratory and immune impacts — increasing health risks for everyone, but especially for the many people already at higher risk from Covid-19, despite the availability of ecological management approaches that eliminate the need for toxic chemicals. H.4650, An Act to mitigate arbovirus in the Commonwealth — was promulgated in response to a Massachusetts Department of Public Health […]

(Beyond Pesticides, May 7, 2020) On April 22, 2020, the Ninth Circuit U.S. Court of Appeals granted the U.S. Environmental Protection Agency (EPA) 90 days to respond to Natural Resources Defense Council’s (NRDC) petition requesting cancellation of tetrachlorvinphos (TCVP), a toxic organophosphate pesticide in pet products. The order followed the Ninth Circuit’s decision to grant NRDC’s petition for a writ of mandamus (a court’s order requiring a lower court or public authority to perform its statutory duty) as EPA withheld action to fulfill NRDC’s judicial review of TCVP, for over a decade. A favorable ruling on NRDC’s mandamus petition can influence other petitioners that hope to coerce agency action, especially when public health is at risk. The court states, “Repeatedly, the EPA has kicked the can down the road and betrayed its prior assurances of timely action, even as it has acknowledged that the pesticide poses widespread, serious risks to the neurodevelopmental health of children.” NRDC petitioned EPA to cancel TCVP pesticide registration under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) in April 2009, after studies indicated humans absorb TCVP through contact with pesticide-treated pet products. EPA failed to respond to the initial petition after five years, and NRDC filed a 2014 mandamus requiring […]

(Beyond Pesticides, May 6, 2020) The Trump Administration announced late last month that it is waiving a requirement that multinational chemical company Syngenta-Chemchina continue to monitor Midwest waterways for the presence of the weedkiller atrazine throughout 2020. While rationalized by the Administration as “due to the unanticipated impact of Covid-19,” the move will instead put residents health at increased risk. Atrazine is one of 78 pesticides that has been linked to the development of respiratory ailments like wheeze. “The public will now have no idea whether dangerous levels of atrazine are reaching rivers and streams throughout the Midwest. That’s absurd and reckless,” said Nathan Donley, PhD a senior scientist with the Center for Biological Diversity. “Syngenta should suspend the sale and use of this extremely toxic pesticide until it can safely ensure it’s not polluting Corn Belt waterways.” Syngenta, which merged with state-owned China Nation Chemical Corporation (Chemchina) in 2016, has been bound by EPA to monitor Midwestern waterways since a 2004 review by the agency. This is because atrazine is a potent groundwater contaminant. Just two years ago, an analysis by the Environmental Working Group found atrazine to be exceeding legal limits in drinking water for many Midwestern states. […]

(Beyond Pesticides, May 4, 2020) Exemptions to the Fair Labor Standards Act allow children to work unlimited hours in agriculture at the age of 12 and allow child farmworkers to perform hazardous work at the age of 16. These exemptions apply only to farm labor and are significantly less stringent than law applying to other sectors. U.S. Representative Lucille Roybal-Allard of California has reintroduced H.R. 3394, the Children’s Act for Responsible Employment and Farm Safety (CARE) to correct these inconsistencies, which harm farmworker children. Tell your Congressional Representative to co-sponsor H.R. 3394. Thank those who are co-sponsors of the bill. Currently, children ages 12-13 may not be employed outside the home in non-agriculture labor, but may work in agriculture outside of school hours. Children ages 14-15 may work in non-agriculture only with strict limitations on time of day and hours per week, but may work in agriculture outside of school hours without any restrictions. The minimum age for hazardous work in agriculture, such as pesticide handling, is 16, but is 18 for non-farm labor. H.R. will make the restrictions for agriculture child labor consistent with non-agriculture labor. The bill does not apply to the sons and daughters of farmers working on their family farm. The worker protection […]

(Beyond Pesticides, May 1, 2020) As the globe settles in for a long summer of social distancing to prevent the spread of COVID-19, experts warn that concentrated animal feeding operations (CAFOs), more commonly referred to as “factory farms,” are setting the table for the next pandemic. Crowded conditions and prophylactic use of antibiotics, scientists say, are creating an environment ripe for viruses and bacteria to evolve and jump from animal to human populations. The Food and Agriculture Organization of the United Nations said back in 2013, “Livestock health is the weakest link in our global health chain.” Alternatively, organic principles offer an existing federal guideline for ecologically and environmentally viable conditions for agriculture. Michael Greger, M.D., Ph.D., author of Bird Flu: A Virus of Our Own Hatching, explains, “When we overcrowd animals by the thousands, in cramped football-field-size sheds, to lie beak to beak or snout to snout, and there’s stress crippling their immune systems, and there’s ammonia from the decomposing waste burning their lungs, and there’s a lack of fresh air and sunlight — put all these factors together and you have a perfect-storm environment for the emergence and spread of disease.” Dr. Greger notes that the spread of […]

(Beyond Pesticides, April 30, 2020) Chemical-intensive farming of crops for animal fodder powers the global market for highly hazardous pesticides (HHPs), according to data analyzed by Unearthed, and the Swiss NGO Public Eye. Animal fodder production not only intensifies global pollution, but it also increases pesticide exposure and degrades human, animal, and environmental health. This data analysis supports advocates advancing pesticide policies to eliminate HHPs by identifying which toxic chemicals lead global pesticide sales. However, it will take more than eliminating the worst chemicals to address the impending biodiversity collapse and the climate crisis, according to experts who point to the need for an urgent shift to organic land and agricultural management practices. United Nations’ (UN) special rapporteur on toxic substances and human rights, Baskut Tuncak, says, “There is nothing sustainable about the widespread use of highly hazardous pesticides for agriculture. Whether they poison workers, extinguish biodiversity, persist in the environment, or accumulate in a mother’s breast milk, these are unsustainable, cannot be used safely, and should have been phased out of use long ago.”  Unearthed and Public Eye investigated over $23 billion in global pesticide market sales to determine the proportion of pesticides considered highly hazardous by the Pesticide Action Network’s […]

(Beyond Pesticides, April 29, 2020) The terrible reputation with which bats are commonly saddled — especially now, because of their association with the origins of the family of coronaviruses — is undeserved. These nocturnal insect vacuums are fascinating, flying mammals that are under-appreciated, not least for their performance of important services for ecosystems, and for human health and agriculture. Investigators from Israel’s Ben-Gurion University and the Section for Evolutionary Genomics at Copenhagen’s Natural History Museum recently published a study demonstrating that bats can be a mighty tool against pests that damage cotton crops. Bats’ pest control services — relatively invisible because they do their insect marauding at night when humans are not watching — represent an excellent, nontoxic, biological control for some agricultural pests, as well as for mosquitoes that may be human disease vectors. Advocates say that these services should be well considered before any decision to use toxic pesticides that can harm bats, as Beyond Pesticides has covered. The study, “An appetite for pests: Synanthropic insectivorous bats exploit cotton pest irruptions and consume various deleterious arthropods,” was published in Molecular Ecology. [Note: “synanthropic” species are those plants or animals that live near, and benefit from, association with humans […]

(Beyond Pesticides, April 27, 2020) Federal guidance and orders by most Governors have identified “landscaping” as an essential activity that is permitted in spite of stay at home or shelter in place requirements. Tell Your Governor that Lawn Care Pesticides are Not Essential and Increase Risk of COVID-19. Most states follow some variation of guidance issued by the Department of Homeland Security, Memorandum on Identification of Essential Critical Infrastructure Workers During COVID-19 Response, in determining which industries are “essential” and can therefore remain in operation. DHS guidance identifies as essential, “Workers such as plumbers, electricians, exterminators, builders, contractors, HVAC Technicians, landscapers, and other service providers who provide services that are necessary to maintaining the safety, sanitation, and essential operation of residences, businesses and buildings such as hospitals, senior living facilities, any temporary construction required to support COVID-19 response.” While some of the services provided by landscapers and exterminators may be necessary to maintaining safety, sanitation, and essential operations, pesticide application for cosmetic lawn care purposes is not. The hazards of pesticides may be amplified during this pandemic. Threats to the immune and respiratory systems posed by pesticides are likely to make those exposed more susceptible to the coronavirus. Governors should designate as essential outdoor maintenance, including vegetation, only when necessary to […]

(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 […]

In 1962, Rachel Carson said we stood at a crossroads: “The road we have long been traveling is deceptively easy, a smooth superhighway on which we progress with great speed, but at its end lies disaster. The other fork of the road — the one less traveled by — offers our last, our only chance to reach a destination that assures the preservation of the earth.” Eight years later, on April 22, 1970, the first Earth Day encouraged collective action for conservation. Now, in the midst of a pandemic and cascading environmental crises (arguably, down the road of disaster), forging a new path toward restoration will take courage and imagination. This Earth Day, Beyond Pesticides is putting forth a toolkit to abandon half measures and forge ahead with an organic approach for repairing human health and the environment. LISTEN TO SCIENCE Biodiversity is plummeting worldwide. The climate crisis looms even as COVID-19 grabs headlines. Environmental pollution is a predictor of coronavirus death. Never has it been more obvious that the global community is interconnected, and enforcing preventative measures is critical before it is too late. Meanwhile, the Trump Administration’s Environmental Protection Agency (EPA) ignores science, moving ahead with deregulation to […]

(Beyond Pesticides, April 17, 2020) As the novel coronavirus pandemic upends much of human activity, some governments are acting to loosen environmental regulations — purportedly, in the interests of public health in the face of Covid-19 threats, and/or in deference to economic concerns of certain industrial sectors. There has been little analysis, to date, of what the “on the ground” impacts of these relaxed rules may be, but news out of Scotland illustrates some kinds of concerns critics and advocates have about such loosening of regulations. The Scottish Environment Protection Agency (SEPA) has issued new, temporary rules that allow some salmon farms both to ignore newly established limits on the amount of emamectin, an insecticide used to control sea lice that plague the salmon, and to boost use of azamethiphos, another insecticide used against the lice, beyond previous 24-hour limits. SEPA says the relaxed rules will endure only as long as the Covid-19 “lockdown” remains in place (perhaps the end of June), and apply only to new or expanding enterprises, which to date total approximately 14 of the country’s 200+ salmon farms. The farmed salmon industry represents a huge domestic and export commodity worth approximately $2.5 billion annually. In addition […]

(Beyond Pesticides, April 16, 2020) Pesticide exposure in farmland birds is a concomitant of pesticide-treated muesli (cereal) seed commonly planted during winter months, according to research published in Science of the Total Environment by United Kingdom (UK) scientists. Not only do pesticide-treated seeds pose the highest dietary risk to birds, but pesticide-treated seeds also go underreported as farmers often lack knowledge of what pesticides are on the seeds they plant. This study emphasizes the global effects of treated seeds, and their corresponding pesticide exposure, on bird species. Future risk assessments for bird should address these implications when implementing agricultural pesticide policies.  Farmers use of treated seeds exposes farmland birds to pesticides like neonicotinoids (neonics), including clothianidin (CLO). Pesticide residues then accumulate in the birds’ blood. UK scientists examined pesticides in farmland bird blood samples to connect the field-based use of treated seeds to clothianidin exposure patterns. At the time of this study, CLO was the most widely used pesticide on treated winter cereal seeds in the UK. Scientists recorded the presence of neonicotinoid-treated seed in 39 fields of 25 farms after seeding. Camera traps monitored farmland birds’ seed consumption. To measure CLO concentration in treated seed and seedling, scientists used liquid chromatography-tandem mass spectrometry to identify inorganic, organic, […]

(Beyond Pesticides, April 15, 2020) Home pesticide use during pregnancy is associated with an increased risk of a child developing the kidney cancer nephroblastoma, or Wilms’ tumor, according to research published in Cancer Epidemiology by a team of French scientists. Wilms’ tumor is one of the most common childhood cancers but has an inscrutable etiology. This study adds weight to the theory that pesticides are a driver of the tumor’s development, as pesticide use was more strongly associated than other widely investigated causes, including parental smoking and alcohol consumption during pregnancy. Families enrolled in an ongoing nationwide French study were questioned by phone about their lifestyle, including smoking habits, mother’s alcohol consumption, and household pesticide use. Participants were further segmented by their frequency of these risk factors, and pesticide use was narrowed down by type, including herbicide, fungicide, and insecticide use, as well as where the chemicals were used (indoor/outdoor). Researchers ultimately enrolled 117 families whose children developed nephroblastoma, and included 1100 families as a control. A regression analysis found no association between either parent smoking and incidence of the disease. Similarly, no pattern was found in the relation between maternal alcohol consumption and Wilms’ tumor. However, use of any […]

(Beyond Pesticides, April 14, 2020) An op-ed in the New York Times asks, “What Happens if America’s 2.5 Million Farmworkers Get Sick?” Without those farmworkers, the year-round supply of fresh fruits and vegetables that we take for granted would be impossible. The supply chain of those vital foods starts with the workers who plant, cultivate, and harvest them. Our society and everyone living in the U.S. depend on farmworkers. Tell Congress to provide essential benefits to essential farmworkers. But farmworkers are at high risk from the coronavirus (COVID-19) pandemic. Living in crowded conditions, social distancing is impossible for them. They have little access to health care. Washing hands is often impossible in the field. With children home from school, they have additional childcare costs to pay with their low wages. They also have increased costs from using private transportation to avoid crowded buses. And many farmworkers are exposed to respiratory hazards like pesticides and fungal spores that make them more susceptible to the coronavirus. As the medical demand for personal protective equipment (PPE) increases, farmworkers are being faced with potential shortages of masks, gloves, and suits. Last month, a group of Washington farmworkers walked off a worksite because their employer was not offering sufficient […]

(Beyond Pesticides, April 13, 2020) Since 1990, Congress has required an every-five-years review of its Dietary Guidelines — recommendations that are supposed, minimally, to promote public health and prevent chronic diseases. The next review and a draft updated iteration, the 2020–2025 Dietary Guidelines for Americans, are currently underway. The Union of Concerned Scientists (and several colleagues) have examined recent studies on dietary patterns and sustainability; their analysis reveals that the current federal guidelines on diet are unlikely to support sustainability of the food system in the long-term. Beyond Pesticides concurs, and maintains that a transition to sustainable, organic, regenerative agriculture is the path to both improved human health and long-term sustainability of the natural world essential to life. The Union of Concerned Scientists’ (UCS’s) report — In Support of Sustainable Eating: Why U.S. Dietary Guidelines Should Prioritize Healthy People and a Healthy Planet — identifies this next version of the federal guidelines as a critical opportunity to shift the direction of the U.S. food and agricultural system toward far greater sustainability. UCS asserts that such a shift is beyond due: the food system in the U.S. has huge environmental impacts on pollution, use of chemical pesticides, biodiversity, and emissions that significantly […]

(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 […]