(Beyond Pesticides, September 4, 2020) When pesticide drift is investigated, it is most often drift from agricultural fields that is examined. A new study shows that off-target drift of pesticides from greenhouses is also a reality. This research deduced such drift of organophosphate and carbamate pesticides from crop applications done in Ecuadoran floriculture greenhouses by evaluating the acetylcholinesterase enzyme (AChE) activity, necessary to the transmission of nerve impulses, in children residing nearby. The team finds that children living in homes near greenhouses in which these insecticides (widely recognized as cholinesterase inhibitors) are used exhibit reduced activity of this enzyme and abnormal functioning of the nervous system. Beyond Pesticides has monitored the pesticide drift issue intensively, and has long advocated for far better protections for farmworkers. This new information connects those issues, and expands the “drift” concerns to include risks to people working in greenhouses, and to those, especially children, who happen to live near greenhouse-type structures in which these toxic chemicals are used. The study evaluates data during three separate periods (2008, April 2016, and July–October 2016) on 623 children, aged 4–17, living in floricultural communities in Ecuador. The research is part of the study of the Secondary Exposure to Pesticides […]

(Beyond Pesticides, September 3, 2020) Occupational exposure to pollutants including, those from wood burning, pesticides, metals, and vehicle combustion, increases the risk of developing heart abnormalities among Latinx individuals, according to new research published in the Journal of the American Heart Association. Although previous research focuses on the impact of pollutants on human health from occupational or residential exposure, this study highlights the risk chemical exposure can have on communities, especially for those underrepresented in conventional occupational health studies, such as those with Hispanic or Latinx backgrounds. People of color communities are already at greater risk of exposure to environmental and health harms, such as pesticide pollution, which has been identified as environmental racism. Additionally, not only are people of color at risk of developing various, serious health issues associated with additional or cumulative pesticide exposure, they disproportionately face an elevated risk from Covid-19 as essential workers or family members of those workers. According to the researchers, “The objective of this study was to assess the relationship between occupational exposure to hazardous substances and cardiac structure and function in Hispanic/Latino participants in ECHO‐SOL (Echocardiographic Study of Latinos).” It is significant as it highlights the regular/routine exposure to environmental pollutants, including pollution from […]

(Beyond Pesticides, September 2, 2020) It’s being called the Monarch Massacre—hundreds of monarch butterflies found dead after the Vector Control Department of Cass County, North Dakota aerially sprayed the county for mosquito control. This incident occurred during a moment in history that is seeing monarchs at the edge of extinction, with the number of monarch butterflies overwintering in Mexico having declined 53% from last year, according to a count conducted by World Wildlife Fund (WWF) Mexico. This tragedy happened as the nation and the world are experiencing an insect apocalypse and severe biodiversity decline, threatening the web of life. (See Study Predicts Demise of Insects within Decades if Pesticide Dependence Continues.) While it is critical that steps be taken by communities nationwide to protect their local ecology, the incident generated a response from Cass County that claims that the insecticides used are “the lowest toxicity products on the market for mosquito control,” and points to the “monarch migration [that] is a sporadic event that unfortunately occurred during the latest adult mosquito control application.”  The County justifies the spraying because of nuisance mosquitoes and a finding in the “surrounding communities” of mosquitoes carrying West Nile virus (WNv). In its Facebook statement, the County […]

(Beyond Pesticides, August 13, 2020) Levels of the notorious herbicide compound glyphosate in the human body are reduced by 70% through a one-week switch to an organic diet, finds a new, peer-reviewed study published in August 2020 in the journal Environmental Research. This result emphasizes both the ubiquity of this compound in the human body, and diet as the primary source of exposure for most people. It also adds to the evidence for Beyond Pesticides’ assertions that: (1) chemical-intensive agriculture must be abandoned, for a variety of reasons that include human health, and (2) in the lead-up to a transition to organic and regenerative agriculture, consuming organic foods as much as is practicable is powerful protection from glyphosate, and from the assault of multiple chemical pesticides to which most people are exposed. Glyphosate is the active ingredient in the popular weed killer RoundupTM, which has been used intensively in the U.S. and around the world, especially during the last couple of decades. It is very commonly used on crops grown from genetically engineered (GE) companion seeds for a variety of staple crops (e.g., soybeans, cotton, and corn). These GE seeds are glyphosate-tolerant, whose attribute has allowed growers to apply the herbicide and […]

(Beyond Pesticides, August 6, 2020) New research finds that a decline in wild pollinator abundance, notably wild bees, limits crop yields in the U.S., according to the study, “Crop Production in the USA Is Frequently Limited by A Lack of Pollinators.” The study results, published in the journal Proceedings of the Royal Society B, find the annual, national average value of wild bee pollination for the most economically important and pollinator-dependent crops is approximately $1.5 billion, with the total value of all U.S. pollinator-dependent crops equaling $50 billion annually. The United Nations states that 75% of the 115 top global food crops depend on insect pollination, with one third of all U.S. crops dependent on pollinators, according to the U.S. Department of Agriculture (USDA). However, research finds that many insect populations are declining by half with a third threatened by extinction, including managed and wild pollinators, mainly due to habitat fragmentation, climate change, and extensive pesticide use. With the global reliance on pollinator-dependent crops increasing over the past decades, a lack of pollinators threatens food security and stability. The researchers in the study note, “Our findings show that pollinator declines could translate directly into decreased yields or production for most of the crops studied, […]

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

(Beyond Pesticides, July 16, 2020) Long-term exposure to sublethal (low-level) concentrations of the neonicotinoid in soil negatively affects the health and behavioral development of black garden ants (Lasius niger) colonies, according to a study published in Communications Biology by scientists at the University of Bern, Switzerland. Ants are one of the most biologically significant insects in the soil ecosystem, acting as ecosystem engineers. Their burrowing behavior aerates the soil, allowing oxygen and water to penetrate down to plant roots. Additionally, ants increase soil nutrient levels by importing and accumulating organic material like food and feces, thus enhancing nutrient cycling. Like many other insects, ants are unfortunate victims of the global insect apocalypse or population decline, and much research attributes the recent decline to several, including pesticide exposure. Broad-spectrum pesticides, like neonicotinoids, indiscriminately kill pests and nontarget organisms alike, as their ubiquitous use contaminates soils, even in untreated areas. This study highlights the necessity of rethinking chemical pest management, developing sustainable agricultural practices that reduce the use of agrochemicals, like pesticides, to prevent permanent environmental ecosystem damage. Researchers in the study note, “To prevent irreparable damages to functioning ecosystems, [we] suggest to either fully incorporate long-term effects in risk assessment schemes, or to make a shift […]

(Beyond Pesticides, July 10, 2020) A study published in June 2020 in Environmental Health journal is especially concerning for people who become, or plan to become, pregnant. It concludes that personal, agricultural, and household exposures to pesticides may increase the risk of a relatively rare fetal disorder called “holoprosencephaly.” The study finds that pre-conception and the first few weeks of pregnancy are the most vulnerable periods during which exposure can increase risk of this disorder, in which the embryo’s forebrain fails to develop into two distinct hemispheres. The study’s results reinforce Beyond Pesticide’s long-standing warnings of the dangers of pesticides to children and the necessity of shifting to a precautionary approach to the introduction and use of synthetic pesticides (and other chemicals) across all sectors. The importance of this shift is perhaps no more poignantly illustrated than in the impacts that pesticide exposure can have on new life. The study, conducted from 2016 through 2019 by researchers from NIH (the U.S. National Institutes of Health) and the University of Wisconsin–Madison, is a case-control study — one that compares subjects who have a disease or disorder with “controls” who do not have the disorder, comparing the frequency of exposure to a particular risk […]

(Beyond Pesticides, July 8, 2020) Efforts to control the transmission of malaria are encountering a big, though predictable, problem: the mosquitoes that transmit malaria are developing resistance to at least five of the insecticides that have been central to limiting transmission of the disease. A study released in late June reveals a dramatic increase in resistance to pyrethroid insecticides and DDT across sub-Saharan Africa. This signals the failure of a mainstay chemical approach to the spread of malarial mosquitoes; this same problem — resistance — is happening with chemical management of agricultural pests and weeds, and with antibiotics to treat human bacterial infections. This study underscores a point Beyond Pesticides has made repeatedly: resistance to pesticides (whether insecticides, herbicides, biocides, fungicides, or medical antibiotics) is nearly inevitable. The solution to containing the spread of malaria lies not in the use of more and different chemicals, but in nontoxic approaches that respect nature and ecological balance. Malaria is a sometimes deadly disease caused by female Anopheles mosquitoes infected with any of four varieties of the Plasmodium parasite. The disease kills roughly 400,000 people annually, with half that mortality in sub-Saharan Africa. The U.S. sees approximately 2,000 cases of malaria annually, primarily in […]

(Beyond Pesticides, June 11, 2020) Researchers at North Carolina State University (NC State) and Duke University found that dogs can potentially operate as a sentinel, or indicator, species for environmental contaminate exposure – and subsequent diseases – in humans using silicone monitoring devices (i.e., wristbands, collars, etc.), according to research published in Environmental Science & Technology. Although scientists commonly use silicone devices to gauge organic contaminant exposure levels in epidemiological studies, the identification of chronic human diseases from pollutants remains challenging. Anthropoid (human) diseases can take many years to develop, even after initial contaminant exposure. However, dogs can develop comparable anthropomorphic diseases from susceptibility to the same environmental contaminants, but at a much quicker pace. This research highlights the significance of researching disease identification methods, mutual amid multiple species, to mitigate challenges surrounding long disease latency periods. Matthew Breen, Ph.D., professor of comparative oncology genetics at NC State, asserts, “If we develop ways to correlate dog disease with their exposures over time, it may allow human-health professionals to mitigate these exposures for both species. This study reinforces the concept of One Health, demonstrating that in addition to being our closest animal companions, our dogs are truly a sentinel species for health.” As […]

(Beyond Pesticides, May 29, 2020) The U.S. Environmental Protection Agency (EPA)’s Office of Inspector General (OIG) recently released a report highlighting employee discontent with scientific integrity (SI) within the agency. While the number of official complaints about scientific integrity have been fairly minimal over the 8 years that the 2012 policy has been in place—only 85 complaints were filed—the new survey found 400 EPA employees had experienced, but did not report, potential violations of EPA’s scientific integrity policy. Further, according to OIG’s findings, dissatisfaction regarding scientific integrity abounds within the agency. EPA’s 2012 Scientific Integrity (SI) Policy was instated to “ensure scientific integrity throughout EPA and promote scientific and ethical standards, including quality standards; communications with the public; the use of peer review and advisory committees; and professional development.” EPA’s policy defines scientific integrity as “the adherence to professional values and practices when conducting, supervising, communicating and utilizing the results of science and scholarship.” OIG’s performance audit took place from September 2018 to February 2019 and included a survey given between November and December of 2018. OIG’s report states, “The survey was structured to examine (1) awareness of and familiarity with the SI Policy, (2) experience with the four focus […]

(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, February 13, 2020) Congress unanimously passed the Food Quality Protection Act (FQPA) in 1996 to increase protections for children from pesticide exposure. Unfortunately, according to a new study published in Environmental Health, the law is not being employed by the Environmental Protection Agency (EPA) to its full capacity. For most of the 59 pesticides reviewed by the study, EPA did not apply an additional FQPA safety factor and thereby missed an opportunity to protect children’s health. In fact, FQPA solidified EPA’s reliance on risk assessment calculations and mitigation measures that consistently fall short of adequate levels of protection because of serious data gaps, a failure to consider exposure to mixtures and synergistic effects, and a bias against consideration of alternatives (alternatives assessment)  that show toxic pesticides to be unnecessary.  FQPA establishes a safety standard applied to all food commodities that considers specific risks for infants and children. The law requires EPA to assess the “aggregate risk” (considering exposure from multiple sources) and “cumulative exposure” to pesticides that have a “common mechanism of toxicity.” FQPA mandates “an additional tenfold margin of safety for the pesticide chemical residue and other sources of exposure shall be applied for infants and children […]

(Beyond Pesticides, January 21, 2020) As news reports come in demonstrating the threats to major groups of organisms, such as insects and birds, and the stability of Earth’s ecosystems, and scientists appeal for major policy changes, recent actions by the Environmental Protection Agency’s Science Advisory Board highlight the need for public insistence that EPA do its job. Tell EPA Administrator Andrew Wheeler to follow the advice of scientists and do his job. Tell your Congressional representatives to support scientific integrity at EPA and other agencies. Although the influence of regulated corporations has historically silenced science that threatens profits–as shown by industry reaction to Rachel Carson’s Silent Spring—attacks on science in federal agencies have increased in the Trump administration. EPA has dismissed findings of scientists concerning chlorpyrifos, atrazine, and synthetic pyrethroids. Now EPA’s war on its own scientists has reached the point that its Science Advisory Board, which oversees the scientific integrity of the agency’s regulation, posted letters on-line criticizing EPA’s rollback of environmental protections. As reported in a front page story on January 1, 2020 by The New York Times, “A top panel of government-appointed scientists, many of them hand-selected by the Trump administration, said on Tuesday that three of President Trump’s most far-reaching and scrutinized proposals to weaken major […]

(Beyond Pesticides, January 16, 2020) Exposure to environmental chemicals in the U.S. since the turn of the century has resulted in millions of lost IQ points, hundreds of thousands of cases of intellectual disability, and trillions of dollars of lost economic activity. This is according to a study led by a team of scientists at the New York University Grossman School of Medicine, published in the journal Molecular and Cellular Endocrinology. “Although people argue against costly regulations, unrestricted use of these chemicals is far more expensive in the long run, with American children bearing the largest burden,” says senior study author Leonardo Trasande, MD, MPP in a press release. Exposure to environmental chemicals can result in neurotoxic effects. Prenatal exposure represents a critical window when these effects can be particularly pronounced and result in lasting damage to a child. Researchers focused their study on contact with mercury, lead, organophosphate pesticides, and flame retardants in the womb. Biomonitoring data from a long-running Centers for Disease Control and Prevention study on environmental chemicals was used to determine exposure levels. Because each chemical results in differing levels of intellectual damage, each was assigned an IQ impact based on past research. For example, scientists indicated […]

(Beyond Pesticides, January 15, 2019) A study published in the journal Environment International, Association of urinary metabolites of organophosphate and pyrethroid insecticides, and phenoxy herbicides with endometriosis, is the first of its kind. Researchers considered the endocrine-disrupting properties of pesticides (such as reduced sperm counts) and investigated whether there might be a relationship between pesticide exposure and endometriosis. Endometriosis is an estrogen-dependent gynecologic disease that affects about 176 million women globally. It can cause extreme pain and infertility as well as increased risk for cancer and cardiovascular diseases. This study finds a positive correlation between some pesticide metabolites and endometriosis, though authors encourage further study to corroborate the findings. Researchers examined exposure to 11 “universal pesticides” and their metabolites and its relationship to endometriosis in 492 reproductive-age women recruited from 14 surgical centers in Utah and California from 2007-2009. The women at these clinics were scheduled for laparoscopy or laparotomy—the “gold standard” for identifying endometriosis is through these surgeries. The study compares results from the clinical cohort to a group of women in the same age bracket from areas surrounding the participating clinics. 619 urine samples were analyzed from the operative and population cohorts. This study detected six of the […]

(Beyond Pesticides, January 10, 2020) A new study by researchers out of the University of Iowa College of Public Health, published in JAMA (the Journal of the American Medical Association) Internal Medicine, demonstrates that greater exposure to pyrethroid insecticides is associated with higher risks of death from all causes and from cardiovascular disease. These compounds can be inhaled, ingested, or absorbed through the skin; they are highly neurotoxic, and have also been linked to certain cancers, endocrine disruption, and suppression of the immune system, as well as respiratory and reproductive impacts. The researchers gathered data, for 2,116 adults aged 20 or older, from the National Health and Nutrition Examination Survey. Each of those subjects had contributed a urine sample at some point between 1999 and 2002. Urine samples reflect levels of a pyrethroid metabolite (3-phenoxybenzoic acid) present, which in turn offer information about pyrethroid exposure. The researchers followed the participants until 2015; the research analysis was performed in the summer of 2019. Data were adjusted to accommodate multiple factors (age, sex, ethnicity, socioeconomic status, diet and lifestyle, smoking status, body mass index, and urinary creatinine levels). The co-authors report that subjects with the highest levels of metabolites had a 56% […]

(Beyond Pesticides, December 9, 2019) Although the influence of regulated corporations has historically silenced science that threatens profits – as shown by industry reaction to Rachel Carson’s Silent Spring – attacks on science in federal agencies have increased in the Trump administration. EPA has dismissed findings of scientists concerning chlorpyrifos, atrazine, and synthetic pyrethroids. The U.S. Department of Agriculture has discontinued collecting data on honeybees. The U.S. Fish and Wildlife Service refused to designate critical habitat for the endangered rusty patched bumblebee. Tell your Congressional Representative to cosponsor H.R. 1709, the Scientific Integrity Act, and thank those who already have cosponsored. H.R. 1709, the Scientific Integrity Act, was introduced by Rep. Paul Tonko of New York, in an effort to restore scientific integrity to government agency decision-making. The bill begins with the premise that “science and the scientific process should inform and guide public policy decisions on a wide range of issues, including improvement of public health, protection of the environment, and protection of national security.” It prohibits scientific misconduct, suppression of scientific findings, intimidation of researchers, and creation of barriers to communicating scientific or technical findings. It limits the actions an agency may take in the process of approving dissemination of scientific results and gives individual researchers […]

(Beyond Pesticides, November 25, 2019) Continuing its marathon of deregulation to benefit the chemical industry, the Trump administration’s Environmental Protection Agency (EPA) announced its proposal to increase the amount of the weed killer atrazine allowed in U.S. waterways by 50% during the chemical’s registration review—a stark reversal of previous proposals to significantly reduce atrazine levels in the environment. The atrazine proposal follows closely on the heels of a proposal to further weaken protections regarding 23 pyrethroid insecticides that have been repeatedly linked by peer-reviewed studies to neurological issues such as learning disabilities in children. Ask Congress to request an investigation into whether EPA is ignoring its statutory duty and regulatory requirements to use science in its proposals. EPA’s atrazine proposal comes after agrichemical giant Syngenta and the National Corn Growers Association requested that EPA dismiss independent research regarding the adverse impact of atrazine. Atrazine, a broadleaf herbicide, is linked to endocrine disruption, neuropathy, and cancer. It disrupts the sexual development of frogs at levels far below the current allowed concentrations by EPA. Studies by Tyrone Hayes, PhD, University of California, Berkeley, and others have shown that concentrations as low as 0.1 ppb turn tadpoles into hermaphrodites. A 2009 study linked birth defects like gastroschisis and choanal atresia to the relative concentrations of atrazine and other pesticides […]

(Beyond Pesticides, November 14, 2019) The Environmental Protection Agency (EPA), under pressure from chemical companies, released a proposal on Tuesday to further weaken protections regarding 23 pyrethroids. Pyrethroids are a common class of neurotoxic insecticides that have been repeatedly linked by peer-reviewed studies to neurological issues such as learning disabilities in children. They are also extremely damaging to non-target invertebrates, according to EPA’s own analysis. Despite this, EPA had already recently undermined protections for children from these chemicals, and the Trump Administration is now embracing industry proposals to further remove other safety barriers to human health and the environment. The Pyrethroid Working Group, a weighty working group of pesticide companies, requested EPA reduce safeguards such as a permanent 66-foot vegetation buffer between fields and water bodies to a 10 – 25-foot buffer. Also, the working group (and now EPA) suggests that the wind-speed cutoff for spraying should be increased from 10 mph to 15 mph. EPA’s announcement proposes the reapproval of five out the 23 pyrethroids; proposals regarding the rest are already pending approval. EPA is accepting public comments on the proposal until January 13, 2020. As mentioned, this is only the latest detrimental decision EPA has put forth regarding […]

(Beyond Pesticides, October 17, 2019) The U.S. Environmental Protection Agency (EPA) is downplaying the connection between exposure to the herbicide paraquat and the development of Parkinson’s disease, per registration review documents released by the agency this week. Although unsurprising given the current administration’s track record of defending some of the most heinous chemicals still on the market, the review nonetheless marks a low point for scientific integrity within EPA’s Office of Pesticide Programs, according to advocates. Health and environmental advocates have already discounted EPA’s industry-biased review, and are instead pushing hard for Congressional action – namely HR 3817, the Protect Against Paraquat Act, introduced by Congresswoman Nydia Velazquez (D-NY). Under federal law, pesticides are required to undergo reevaluation every 15 years. Paraquat is a potent restricted use herbicide, not available to be applied by residential users, but permitted for use on multiple agriculture crops. Over the last decade, independent peer-reviewed scientific studies have repeatedly found strong associations between paraquat to the development of Parkinson’s disease. Many of these studies have been covered in Beyond Pesticides’ Daily News or are recorded in the Pesticide-Induced Diseases Database. In response to this growing body of literature, EPA conducted an epidemiological evaluation of published […]

(Beyond Pesticides, September 24, 2019) In 2016, Canadians and Americans residing in Havana reported symptoms of headaches, dizziness, nausea. They described hearing strange buzzing and high-pitched sounds – some woke in the middle of the night fumbling for alarm clocks that were not going off. Media used the term “Havana syndrome” to describe the illness. Diplomats, scared by symptoms that seemed to only hit them in their hotel rooms or at home, speculated that a sonic weapon was being used against them. The Trump administration accused Cuban leaders of misconduct and removed all but essential employees. Later, some suspected that the diplomats could have experienced “mass hysteria.” A new Canadian study provides a more likely explanation to this mysterious illness that impacted diplomats in Havana: neurotoxic pesticide exposure. Researchers conducted testing on 14 individuals who had resided in Havana and a control group of 12 that had never lived there. Some of the experimental group had been recently exposed while others, tested 19 months after their return, were classified as “remotely exposed.” Tests included brain imaging and self-reported symptom questionnaires. They analyzed blood samples for routine biochemistry, kidney, liver, and metabolic functions. Individuals that showed symptoms of brain injury went […]

(Beyond Pesticides, August 15, 2019) An article in the journal Plos One, “An assessment of acute insecticide toxicity loading (AITL) of chemical pesticides used on agricultural land in the United States,” shows that recent shifts in insecticide use—from organophosphates and carbamates to synthetic pyrethroids and neonicotinoids—have made a large contribution to the ongoing insect apocalypse. This shift to insecticides that target insects based on both selective toxicity and delivery method occurs within a context of shrinking habitat and biodiversity. The study, by Michael DiBartolomeis, PhD, Susan Kegley, PhD, Pierre Mineau, PhD, Rosemarie Radford, and Kendra Klein, PhD, presents a measure of acute insecticide toxicity loading that incorporates acute toxicity, quantity used, and the rate at which the insecticide degrades. Goulson et al. applied a similar measure in Great Britain that did not incorporate the rate of degradation. Both studies use the median lethal dose (LD50) to honey bees as a measure of acute toxicity and calculate the potential number of bee deaths based on the number of lethal doses of various insecticides applied in the field. In both cases, researchers used toxicity estimates for honey bees because they are widely available. Other insects may be more or less sensitive. The […]