(Beyond Pesticides, February 4, 2016) According to a study published in Oxford University Press, entitled High Levels of Resistance in the Common Bed Bug, bed bugs have developed resistance to neonicotinoids (neonics). Neonics have become one of the most widely used active ingredients to control bed bugs since the insects’ have exhibited  resistance to other chemicals, including synthetic pyrethroids.  Troy Anderson, Ph.D., entomologist at Virginia Tech and Alvaro Romero, Ph.D., entomologist at New Mexico State, studies found higher neonic  efficacy for neonics used on lab bed bugs as compared with bed bugs found in domestic settings. With the resurgence of bed bugs across the U.S., exterminators have relied heavily on insecticides to manage the pesky pests, despite questions about efficacy due to resistance, and viability of alternative, non-toxic solutions. To test the tolerance and ineffectiveness of pesticides used on bed bugs, Drs. Anderson and Romero used four popular neonics (imidacloprid, acetamiprid, dinotefuran, thiamethoxam) to compare their effectiveness in wild and isolated bed bug populations. Bed bugs isolated in a lab died quickly from a small amount of neonics, however, those same chemical treatments used on bed bugs found in Cincinnati and Michigan were ineffective. The isolated group of bed bugs […]

(Beyond Pesticides, November 23, 2015) Commonly-used pesticides can impact aquatic species over multiple weeks, even when chemicals are no longer detectable in water nor  monitored by regulators, according to new research. The study, titled A long-term assessment of pesticide mixture effects on aquatic invertebrate communities,  published in the journal Environmental Toxicology and Chemistry, investigates the long-term effects on aquatic invertebrate communities of commonly-used insecticides: two pyrethroids (permethrin and lambda-cyhalothrin) and an organophosphate (chlorpyrifos). Pesticide applications were based on environmentally relevant concentrations and lethal concentrations (a concentration required to kill a certain percentage of animals tested) ranging from 10% (LC10) to 50% (LC50). Researchers made repeat applications in order to mimic runoff events in a multiple grower or homeowner watershed. The results indicate that insecticide mixtures continue to impact natural systems over multiple weeks, even when bound to particles and no longer detectable in water. Combinations of indirect and direct effects caused consequences across the food chain. Pyrethroids rapidly dissipated from the water column, whereas chlorpyrifos was detectable even six weeks after application. “The effects we observed indicate that many species were affected at a sublethal level,” said Simone Hasenbein, Ph.D., lead author of the study tells Phys.org. “Thus, populations exposed […]

(Beyond Pesticides, October 14, 2015) New research from the Center for Environmental Research and Children’s Health (CERCH) shows that children, especially those in low-income and agricultural families, who switched to an organic diet reduced their bodies’  level of pesticides. This California study is one of several that documents the benefits of eating an organic diet, especially for children who are especially vulnerable to pesticide exposures due to the developing bodies. The study, Effect of Organic Diet Intervention on Pesticide Exposures in Young Children Living in Low-Income Urban and Agricultural Communities  follows 40 children, 3-6 years old from low-income families living in urban and agricultural environments in Oakland and Salinas, California. The children alternated between a conventionally grown diet and organic, and urine samples were analyzed each day. The researchers measure 23 metabolites of several pesticides classes, including organophosphates (OP) and pyrethroid insecticides, and the herbicides 2,4-D and metolachlor. These pesticides are frequently detected (> 72%) in urine samples collected, with metabolites of 2,4-D detected 90 percent of the time, and pyrethroids 82 percent. Overall, among the most frequently detected pesticides, metabolites of OPs  decreases by nearly 50 percent when children are on an organic diet, and levels of 2,4-D falls […]

(Beyond Pesticides, August 20, 2015) Just as children go  back to school, research  finds that lice in 25 of 30 states in a  U.S. study have developed resistance to common over-the-counter treatments like permethrin, calling into questions the justification for exposing children to a neurotoxic and carcinogenic pesticide and elevating the need to consider nontoxic alternatives. The  research was presented Tuesday at the 250th National Meeting and Exposition of the American Chemical Society (ACS), by Kyong Yoon, Ph.D., of Southern Illinois University, Edwardsville. Classified as a synthetic pyrethroid insecticide, permethrin is “likely carcinogenic” and a suspected endocrine disruptor, immunotoxic, neurotoxic, and highly toxic to fish, aquatic animals, and bees. Dr. Yoon and his colleagues describe the threefold mutations that lice have developed over time due to the constant use of synthetic pyrethroid insecticides. This new finding builds on his team’s previous research, which found that 99.6% of lice are resistant to chemical treatment, adding weight to the fact that chemical treatments not only are unnecessary given effective least-toxic alternatives, but also are not able to provide the lice control that manufacturers claim. “We are the first group to collect lice samples from a large number of populations across the U.S.,” […]

(Beyond Pesticides, August 19, 2015) Local fogging for  mosquito control turned tragic for a Palo Alto, California beekeeper who lost hundreds of honey bees from his backyard hives. The beekeeper, who also produces organic honey, now fears his honey is contaminated. The fogging, which occurred last month, was in response to positive tests for West Nile virus in mosquito samples. Many mosquito control pesticides are toxic to honey bees and given the declining populations of pollinators, vector control officials are being asked to carefully consider the risks associated with pesticide spraying. According to the local NBC affiliate, beekeeper Rondolph Tsien believes he was not given sufficient time to protect his bees from the mosquito fogging and, despite trying to cover his hives with a tarp to protect his bees from drifting pesticides, many were lost. A mosquito sample tested positive for West Nile virus about one mile from Mr. Tsien’s home, putting his property in the catchment area for fogging. Mr. Tsien worries the surviving bees will produce contaminated honey that can no longer be labeled organic. A Santa Clara County Vector Control representative stated during an interview that the county uses  an “extremely low dose” of pesticides during fogging […]

(Beyond Pesticides June 4, 2015) Another study has found links between a commonly used household pesticide and attention deficit hyperactivity disorder (ADHD) in children and young teens. Researchers at Cincinnati Children’s Hospital Medical Center found an association between pyrethroid pesticide exposure and ADHD, particularly in terms of hyperactivity and impulsivity. These results reinforce the findings of a study led by a research team at Rutgers University earlier this year that found links between the pesticide deltamethrin and ADHD. In 2001, over concerns about adverse health consequences, the U.S.  Environmental Protection Agency banned several commonly used organophosphate (organic compounds containing phosphorus) pesticides from residential use due to the chemicals neurotoxic properties. The ban led to the increased use of pyrethroid pesticides, which are now the most commonly used pesticides for residential pest control and public health purposes. Pyrethroids, like deltamethrin, are commonly used in the home,  office buildings,  and on vegetable crops, gardens, lawns and golf courses. This shift to predominantly using pyrethroids is troubling, as they have oft been promoted as a safer choice than banned organophosphates, despite the fact that they pose many real threats to human health. Many recent studies show significant concern with this class of chemicals, […]

(Beyond Pesticides, April 1, 2015) According to a new study from Harvard University researchers, eating fruit and vegetables containing pesticide residues adversely affect men’s fertility, leading to fewer and poorer quality sperm. The study, published online in the journal,  Human Reproduction, adds to a growing body of research that finds pesticide exposures give rise to impaired reproductive function, including reduced sperm counts, sperm quality and reduced fertility in exposed men. The results of this study also underscore the importance of an organic diet in reducing pesticide exposures. The study, “Fruit and vegetable intake and their pesticide residues in relation to semen quality among men from a fertility clinic,” believed to be the first to  look into the consumption of fruits and vegetables with high levels of pesticide residue in relation to semen quality, and conducted by researchers at Harvard University’s TH Chan School of Public Health, found that men who ate the greatest amount of fruit and vegetables with high levels of pesticide residue had a 49% lower sperm count and a 32% fewer normally formed sperm than those who consumed the least. Jorge Chavarro, MD, assistant professor of nutrition and epidemiology and co-author of the study, said, “We found […]

(Beyond Pesticides, February 2, 2015) A study led by a Rutgers University research team finds that the commonly used pesticide deltamethrin increases the risk of attention deficit hyperactivity disorder (ADHD) in children, adding to a mounting body of scientific research linking pesticide exposure to the disorder. Rutgers scientists, along with colleagues from Emory University, the University of Rochester Medical Center, and Wake Forest University discovered that mice exposed to the pyrethroid insecticide deltamethrin in utero and through lactation exhibit several features of ADHD, including dysfunctional dopamine signaling in the brain, hyperactivity, working memory, attention deficits and impulsive-like behavior. The study, Developmental pesticide exposure reproduces features of attention deficit hyperactivity disorder, was published Wednesday in the Journal of the Federation of American Societies for Experimental Biology (FASEB). ADHD is estimated to affect 8—12% of school-age children worldwide. ADHD is a complex disorder, and though is strong scientific evidence that genetics play a role in susceptibility to the disorder, no specific gene has been found that causes ADHD and scientists believe that environmental factors, such as pesticide exposure, may contribute to the development of the behavioral condition. “Although we can’t change genetic susceptibility to ADHD, there may be modifiable environmental factors, including […]

(Beyond Pesticides, January 26, 2015) Last week, the U.S. Environmental Protection Agency (EPA) announced it completed the registration of a new pesticide, flupyradifurone, that would be marketed as an alternative to neonicotinoid pesticides, and “safer for bees.” A closer look at this chemical reveals that the agency is grossly misleading the public on the ecological safety of flupyradifurone since the chemical is systemic, persistent, and highly acutely toxic to adult honey bees. At a time when bees are declining, advocates say it is inappropriate for EPA to introduce yet another bee toxic chemical to the market. Flupyradifurone (“Sivanto”) is a new systemic, butenolide insecticide from Bayer CropScience that is to be used on crops such as citrus, cotton, potatoes and many others, and also as seed treatment. Note: EPA is still considering soybean seed treatment. The chemical is a neurotoxic insecticide that can inhibit nicotinic acetylcholine receptors (nAChR) in the nervous system. Neonicotinoids, widely linked to devastating health impacts on bees,  affect the nervous system in the same way. However, EPA states that flupyradifurone differs from neonicotinoids because of the way it binds to the receptors and  is metabolized. However, most troubling is that, based on EPA’s registration documents, the […]

(Beyond Pesticides, July 18, 2014) After years of struggling to combat the rise of Lyme disease in the region, Loudoun County, Virginia has decided to forgo the spraying of a hazardous pesticide in public parks in favor of public education and continued surveillance of park lands. Controversy over spraying arose back in 2012 when Loudoun began ramping its spray program to manage ticks, often the carrier of the disease. Loudon County used the pesticide Talstar, which contains the active ingredient bifenthrin, a neurotoxic chemical whose use raises public health and product efficacy concerns, as documented by the Centers for Disease Control and Prevention. Beekeepers expressed concern that spraying would greatly damage their bee colonies, as bifenthrin is highly toxic to bees, while conservationists were concerned with the chemicals leaching into waterways and killing aquatic life. At the same time, some researchers point out that there was no evidence that spraying the chemical would reduce the number of Lyme disease infections. After years of debate and data analysis,  David Goodfriend, M.D., M.P.H, director of the Loudoun County Health Department, said that the county’s Lyme Disease Commission’s recommendation was to not spray any of the properties. The recommendation was based on two […]

(Beyond Pesticides, June 24, 2014) Research from the University of California, Davis CHARGE (Childhood Autism Risks from Genetics and the Environment) study finds that pregnant women who lived within a mile of agricultural fields treated with insecticides are more likely to have their child develop autism. The results of the CHARGE study, published in Environmental Health Perspectives, strengthens calls from public health and environmental groups urging regulators take a precautionary approach to agricultural chemicals and institute increased protections for those who live, work, or go to school near pesticide-treated fields. The CHARGE study looked at pregnant women’s addresses to determine their location relative to fields treated with pesticides. For women who lived less than one mile from crops sprayed with organophosphate insecticides during their pregnancy, researchers found the likelihood of their child being diagnosed with autism increased 60%. Women in the second trimester living near fields treated with chlorpyrifos, a widely used organophosphate insecticide banned for household use in 2001, are 3.3 times more likely to have their children diagnosed with autism. In response to a legal petition, the U.S. Environmental Protection Agency (EPA) in 2012 instituted risk mitigation measures for chlorpyrifos, including reduced application rates and no-spray buffer zones […]

(Beyond Pesticides, June 9, 2014) A recent talk given by Donald Weston, PhD, a professor emeritus in UC Berkeley’s Department of Integrative Biology, to a community group in San Jose, California warned residents about the dangers that  lawn care insecticides present to  local aquatic life. The talk focused on the problems synthetic pyrethroids and fipronil can have on Hyalella azteca and Chironomus dilutes. Increasing levels of pesticide runoff in local stream systems have not only led to decreased populations of these aquatic crustaceans, but also populations that have become resistant to pesticides. Aquatic invertebrates are extremely sensitive to pesticide runoff and different states around the country have struggled with creating pesticide regulations that foster a healthy aquatic ecosystem. A good way to reduce pesticide runoff is to transition away from toxic land care methods and adopt organic practices. Hyalella crustaceans, a tiny shrimp-like animal, are hypersensitive to pyrethroids, which are a class of insecticides used by professional lawn care companies and found in common products like Raid and mixed with fertilizer products like Scotts Turf Builder under the name SummerGuard. Chironomus dilutes, a red worm-like invertebrate, is sensitive to fipronil, which is used to kill fleas on dogs and cats […]

(Beyond Pesticides, March 13, 2014) Part deux of a 2012 study finding that sperm counts in French men had decreased 30% over the past 16 years came to a second startling conclusion in a 2014 analysis: the cause for those dramatic decreases may be pesticides. 2012 Sperm-Count Study Published in the scientific journal Human Reproduction, the landmark 2012 study showed an alarming 30 percent decrease in sperm counts across France between 1989 and 2005. Because the data for the 2012 study were drawn from Fivnat ””a French assisted reproduction technology database”” researches made sure to limit analysis to 26,600 sperm samples from otherwise virile 35-year-old men whose partners’ fallopian tubes were either blocked or missing. This control was added to ensure that the each couple’s infertility was due to these latter problems and not a problem with the man’s sperm. Broken down, the 2012 studies identified a 1.9 percent continued annual dip in sperm concentration and also found that there was a significant 33.4% decrease in the percentage of normally formed sperm over the entire 16-year period. At the time of release, the 2012 study’s authors wrote: “To our knowledge, it is the first study concluding a severe and general […]

(Beyond Pesticides, March 10, 2014)  Virtually all lice in the U.S. have developed resistance to over-the-counter and prescription shampoos containing the toxic chemical permethrin. The U.S. Environmental Protection Agency’s Office of Pesticide Programs  considers permethrin, part of the synthetic pyrethroid class of chemicals, “likely to be carcinogenic.” However, when used as a lice shampoo the chemical is regulated by the Food and Drug Administration and allowed for use on infants over two months old. The latest study on lice resistance, published in the Journal of the Entomological Society of America, shows that harsh chemical treatments not only are not necessary given effective least-toxic alternatives, but also are not able to provide the lice control that manufacturers claim. “In the UK and Europe, they don’t even use pyrethroids anymore. Virtually everyone but the United States and Canada has given up using these over-the-counter products,” said Dr. John Clark, PhD, a professor of environmental toxicology and chemistry at the University of Massachusetts Amherst and co-author of the new study. In an interview with the Detroit Free Press,  Eric Ayers, MD of the Children’s Hospital of Michigan noted that lice that are not killed by the chemical treatment not only survive, but become […]

(Beyond Pesticides, February 26, 2014) The French agriculture ministry is prosecuting Emmanuel Giboulot, an organic winemaker, for failing to apply insecticide to his vines. The ministry wants insecticide to be sprayed to control the leafhopper Scaphoideus titanus, believed to be responsible for the spread of the grapevine disease, but Mr. Giboulot believes the pesticide is ineffective and damaging to pollinating insects such as bees, and insists the disease can be fought via more natural means. Emmanuel Giboulot appeared before a judge in the city of Dijon on Monday after defying an official order to treat his vineyard against an insect suspected of transmitting a devastating plant disease, and risks six months in jail for failing to take preventive measures against a bacterial vine disease. He was fined €1,000 for putting neighboring vineyards at risk. The court’s final verdict will be announced on April 7. Mr. Giboulot, an organic and biodynamic winemaker, was found to be in violation of a directive to use pesticides to fight Flavenscence dorée, an infectious disease spread by the leaf hopper, Scaphoideus titanus that threatens the Côte-d’Or region of Burgundy. An estimated 30 acres of vines were destroyed by the disease in 2012. “Would we give […]

(Beyond Pesticides, February 10, 2014)    A recent study has found that exposure to pyrethroids is increasing among children and adults. The study also finds that children are still widely exposure to chlorpyrifos, an organophosphate chemical that has been banned for household use for over 12 years. This is not the first study to find high concentrations of pyrethroids in residential, but it may be the first to evaluate correlations between pesticide dust concentration and concentration of pesticides in children’s urine. The study, Urinary Pyrethroid and Chlorpyrifos Metabolite Concentrations in Northern California Families and Their Relationship to Indoor Residential Insecticide Levels,  conducted by researchers at the University of California, Davis, analyzed urine samples from 90 adults, 83 children, and 88 floor wipe samples from participants’ kitchen floors. The participants were 90 northern Californian families who had children born between 2000 and 2005, with the samples collected from 2007-2009.   These samples were analyzed for concentrations of pyrethroids, pyrethroid metabolites, chlorpyrifos, and chlorpyrifos metabolites.  The study found pyrethroid metabolites in 63 percent of all urine samples with concentrations twice as high as levels reported in a national 2001-2002 study. In children, higher concentrations of pyrethroids found in floor wipes were associated […]

(Beyond Pesticides, January 22, 2014)  Exposure to a widely used pesticide causes worker bumblebees to grow less and then hatch out at a smaller size, according to a new study by Royal Holloway University of London. The research, published this week in the Journal of Applied Ecology, reveals that prolonged exposure to a pyrethroid pesticide, which is used on flowering crops to prevent insect damage, reduces the size of individual bees produced by a colony. The researchers, Gemma Baron, Dr Nigel Raine and Professor Mark Brown from the School of Biological Sciences at Royal Holloway worked with colonies of bumblebees in their laboratory and exposed half of them to the pesticide. The scientists tracked how the bee colonies grew over a four month period, recording their size and weighing bees on micro-scales, as well as monitoring the number of queens and male bees produced by the colony. “We already know that larger bumblebees are more effective at foraging. Our result, revealing that this pesticide causes bees to hatch out at a smaller size, is of concern as the size of workers produced in the field is likely to be a key component of colony success, with smaller bees being less […]

(Beyond Pesticides, December 10, 2013) A former steward for Australian-based Quantas airlines is suing the Australian government claiming that frequent insecticide use in airplane cabins resulted in his Parkinson’s disease diagnosis. Australia is among 49 countries that require pesticide spraying on some or all flights. Pesticide use on flights into the United States is not required, but is permitted under international law. (See here for a breakdown of pesticide use in American-based airlines, and here for information from the U.S. Department of Transportation on pesticide use in aircrafts.) Brett Vollus, former Quantas airline steward, worked for the company for 27 years until this past May when he was diagnosed with Parkinson’s and a malignant brain tumor. “He [my doctor] asked me what I did for living and when I told him he just nodded and said: ‘Another one, I am seeing a lot of you’,” Mr. Vollus said to The Australian. “This is a nightmare that has ruined my life. I am very keen to start a legal action and if it can help others I am happy to lead the way.” This case puts an international spotlight on growing evidence that pesticide use is linked to Parkinson’s disease. Parkinson’s […]

(Beyond Pesticides, November 27, 2013) You can almost taste it: the moist, tender turkey, the fluffy mashed potatoes, the creamy green bean casserole, the perfectly seasoned stuffing, the roasted brussel sprouts sprinkled with salty bacon, the sweet tang of the cranberry sauce, and the velvety bite of the pumpkin pie. Thanksgiving and all its bounty is almost here. Of course, the impending feast doesn’t magically appear. Whether you have merely observed the bustle of preparation, assisted with the pealing and chopping, or orchestrated the entire affair, it is well known that the hard work of many lies behind the tantalizing spread. And if your Thanksgiving tradition is like most gatherings across the nation, before you carve the turkey, scoop the mashed potatoes and stuffing, serve up the salad, and ladle the gravy all over your plate, there is a moment of pause. Be it in the form of prayer, song, or simple sharing, it is a moment honoring the purpose for this great celebration. It is a moment to stop and be grateful for the bounty before you and the friends surrounding you. It is a moment to give thanks for the hard work of those who prepared the great […]

(Beyond Pesticides, November 1, 2013) Insecticides commonly used in homes and schools are associated with behavioral problems in children, according to a recent study by Canadian researchers. The study investigates exposure to pyrethroid pesticides, used in more than 3,500 products, including flea and tick controls, cockroach sprays, and head lice controls. The study, Urinary metabolites of organophosphates and pyrethroid pesticides and behavioral problems in Canadian children, published in the journal Environmental Health Perspectives, raises serious concerns about the impact of pyrethroids, which are increasingly used as a replacement for organophosphates. This study uses data from the Canadian Health Measures Survey (2007-2009), a nationally representative survey, so researchers are able to apply these findings to the entire population of Canadian children. In a previous study among U.S. children, researchers at the National Health and Nutrition Examination Survey (NHANES) examined the metabolites of pyrethroids in children below the age of six. Similarly, they found pyrethroid insecticides in more than 70 percent of the samples, concluding that children had significantly higher metabolite concentrations than those of adolescents. Together these studies demonstrate that exposure is widespread, with real impacts to human health. In the recent study, researchers analyzed organophosphate and pyrethroid metabolites in the […]

(Beyond Pesticides, October 3, 2013) According to new research, residents are more highly exposed to organophosphate and pyrethroid pesticides in New York City (NYC) than in the U.S. overall.  Researchers from the city’s Department of Health and Mental Hygiene reviewed the 2004 NYC Health and Nutrition Examination Survey (NYC HANES) to compare its pesticide exposure patterns in an urban environment with the nation as a whole. The NYC HANES includes a biomonitoring component to evaluate pesticide exposures by measuring concentrations of organophosphate and pyrethroid metabolites in urine. According to the authors, the findings underscore the importance of considering pest and pesticide burdens on cities, where a dense population results in a single exposure source affecting many people at the same time when regulating pesticide use. Organophosphate metabolites were measured in the urine of 882 New Yorkers, while 1,452 residents were tested for pyrethroid metabolites. As the researchers explain, the building density and disrepair in parts of NYC likely increased the chances of a pest infestation, which in turn can lead to the reliance on indoor pesticide use. By the 1980’s, organophosphates were the most common class of insecticides in the U.S., and were used indoors until the early 2000’s when […]

(Beyond Pesticides, September 3, 2013) For the past several years, corn rootworms  have  been widely reported to exhibit resistance  to corn genetically engineered (GE) with the Bacillus thuringiensis (Bt) toxin. A  new report by  University of Illinois researchers found the resistant corn rootworm  in two of the state’s counties significantly damaged by western corn rootworm. The increasing lack of efficacy of GE corn, developed with the claim that it  is specifically designed to protect corn from rootworm, calls into question the efforts of agrichemical companies to patent new forms of GE crops. The report by Joe Spencer, PhD, and Michael Gray, PhD,  identifies significant damage from western corn rootworms in farm field that were planted with GE corn that contain a Bt protein referred to as “Cry3Bb1,” which has been inserted into nearly one-third of the corn planted in the United States. This version of Bt corn was introduced by Monsanto in 2003, and was touted as a way to reduce insecticide use against rootworm pests. Evidence was gathered in two Illinois counties, Livingston and Kankakee, after fields that had severe root pruning and lodging were brought to the attention of Drs. Spencer and Gray. Dr. Gray was quoted in […]

(Beyond Pesticides, August 26, 2013) A recent study presented by the Centers for Disease Control and Prevention (CDC)   at the International Conference on Lyme Borreliosis and other Tick-Borne Diseases in Boston finds that spraying lawns with the insecticide bifenthrin does not reduce the incidence of tick-borne diseases. The study could have important policy implications for towns and communities that are feeling pressure to spray as prevalence of tick-borne diseases, such as Lyme disease, continue to rise.  There are least-toxic alternative management strategies that are effective and safer than chemical controls. The recently released study by CDC included 2,500 households in Fairfield, Litchfield, and New Haven Counties in Connecticut; Dutchess County in New York; and four counties in Maryland. Half of the households’ lawns were sprayed with bifenthrin and the other half was sprayed with water as a control. The study, conducted over two years, found that the households that were sprayed with bifentrhin saw a 60 percent reduction in ticks on their propriety but still had similar levels of tick encounters and tick-borne illnesses. These final results are similar to the results the study found after its first year.   This research reveals that using pesticides is not an […]