(Beyond Pesticides, September 3, 2010) New research shows that silver nanomaterials, which are used in a number of consumer products as antimicrobial agents, can interrupt important cell signaling within male reproductive sperm cells, causing them to stop growing. In previous studies, scientists reported how smaller-sized silver nanoparticles — in the 10 – 25 nanometer range — decrease the growth of male stem cells when they are exposed at concentrations greater than 10 micrograms per milliliter (μg/ml). This new study, on the other hand, is the first to identify how the silver nanoparticles stop the sperm stem cells from growing, with the biggest effects from the smallest-sized nanoparticles tested. Like many other studies on the effects of nanotechnology, this study raises important questions about the potential hazards to human health due to the prolific use of silver nanoparticles in the market. Researchers tested the effects of different sizes, concentrations and coatings of silver nanoparticles on cell growth of mouse sperm cells. They compared silver nanoparticles coated with either hydrocarbons — at 15 nm, 25 nm and 80 nm diameters — or sugars — at 10 nm, 25 – 30 nm and 80 nm diameter. Exposure to the smaller sized particles led […]

(Beyond Pesticides, August 31, 2010) As the Environmental Protection Agency (EPA) continues its review of the popular herbicide atrazine, a new study shows that male rats prenatally exposed to low doses of the gender-bending chemical are more likely to develop prostate inflammation and to go through puberty later than non-exposed animals. The research adds to a growing body of literature on atrazine, an herbicide used in agriculture, especially in corn and sugar cane production, and on golf courses and residential lawns. Atrazine and its byproducts are known to be relatively persistent in the environment, potentially finding their way into water supplies. It has been linked to a myriad of health problems in humans including disruption of hormone activity, birth defects, and cancer. The research, “Effects of prenatal exposure to a low dose atrazine metabolite mixture on pubertal timing and prostate development of male Long-Evans rats,” which is available online and will be featured on the cover of Reproductive Toxicology (Vol. 30, # 4), found that the incidence of prostate inflammation went from 48 percent in the control group to 81 percent in the male offspring who were exposed to a mixture of atrazine and its breakdown products prenatally. The severity […]

(Beyond Pesticides, August 25, 2010) Exposure to pesticides while in the womb may increase the odds that a child will have attention deficit hyperactivity disorder (ADHD), according to researchers at the University of California-Berkeley School of Public Health. Maternal metabolites of organophosphate pesticides have previously been associated with neurobehavioral deficits in children. The California researchers are studying the impact of environmental exposures on the health of women and children who live in the Salinas Valley, an agricultural region with heavy pesticide use. They tested the urine of pregnant women for pesticide residue, and then tested the behavior of their children at ages 3 ½ and 5. The 5-year-olds who had been exposed to organophosphate pesticides while in the womb have more problems with attention and behavior than did children who were not exposed. Results are published online in the study entitled, “Organophosphate Pesticide Exposure and Attention in Young Mexican-American Children,” in the journal, Environmental Health and Perspectives. Previous studies have shown that exposure to some organophosphate compounds cause hyperactivity and cognitive deficits in animals. One study published in Pediatrics earlier this year found that exposure to organophosphates in developing children might have effects on neural systems and could contribute to […]

(Beyond Pesticides, August 19, 2010)

(Beyond Pesticides, Aug 2, 2010) A new report conducted by an Ann Arbor, Michigan based coalition of health and environmental groups estimates that children’s exposure to toxic chemicals, including pesticides, cost Michigan billions of dollars each year. The study examines the costs associated with four environmentally related childhood diseases: lead poisoning, asthma, pediatric cancer, and neurodevelopmental disorders. Treating these four disorders costs the state of Michigan an average of $5.85 billion annually. The study, “The Price of Pollution: Cost Estimates of Environment-Related Childhood Disease in Michigan” was released in time for the US House Energy and Commerce Committee hearings on the Toxic Chemicals Safety Act of 2010, an overhaul of the 1976 Toxic Substances Control Act (TSCA). Using conservative estimates researchers consider direct costs such as medical treatment, as well as less direct costs such as parent wage losses. The study also notes the substantial emotional costs to families dealing with these potentially life threatening or debilitating conditions which cannot be quantified. Lead poisoning is found to be the most costly of the diseases studied, costing on average $4.85 billion annually, followed by childhood asthma, pediatric cancer, and neurodevelopmental disorders. These four disorders alone cost the state of Michigan 1.5% […]

(Beyond Pesticides, July 27, 2010) Groups filed a lawsuit in federal court to force the Environmental Protection Agency (EPA) to decide whether or not it will cancel all remaining uses and tolerances for the pesticide chlorpyrifos, which has been banned for residential use, but continues to expose farmworkers and consumers through its use in agriculture. In September 2007, the Natural Resources Defense Council (NRDC) and Pesticide Action Network North America (PANNA) filed a petition with EPA asking the agency to ban chlorpyrifos. In the nearly three years since, the agency has not responded. NRDC and PANNA v. EPA, filed by the nonprofit environmental law firm Earthjustice on July 22, 2010, would force EPA to make a decision on the pesticide’s ban. “This dangerous pesticide has no place in our fields, near our children, or on our food,” said Earthjustice attorney Kevin Regan. “We’re asking a court to rule so that EPA will finish the job and ban this poison.” According to Beyond Pesticides, EPA’s 2000 negotiated settlement with Dow AgroSciences, which allows the highest volume chlorpyrifos uses to continue, represents a classic failure of the risk assessment process (including the so-called cumulative risk assessment which accounts for all chemicals with […]

(Beyond Pesticides, July 23, 2010) A new study published in BioMed’s online journal, Environmental Health, links endocrine disrupting pesticides and other chemicals in household cleaning products to an elevated risk of breast cancer. Researchers at the Silent Spring Institute in Newton, MA and Boston University found that women who use household cleaners more often have double the risk of breast cancer, compared to women who use household cleaners less frequently. The study includes over 1,500 women selected from Cape Cod, MA and found a correlation between cases of breast cancer and the number of women who reported using household cleaners, particularly solid, slow-release air fresheners when used more than seven times a year, and mold removers when used more than once a week. The antimicrobials, phthalates and alkylphenolic surfactants often found in mold and mildew products are associated with various health and environmental issues. The antimicrobial triclosan for example, can cause skin irritation, allergy susceptibility, bacterial and compounded antibiotic resistance, and dioxin that jeopardizes fragile aquatic ecosystems. The study highlights methylene chloride (in some fabric cleaners), nitrobenzene (soaps, polishes), perfluorinated compounds (stainresistant, waterproof coatings), phthalates (surfactants), alkylphenols (solvents), parabens (preservatives), triclosan, and polycyclic musks (fragrance) as ingredients of concern. Past […]

(Beyond Pesticides, July 7, 2010) Long-term exposure to nitrates, a common agricultural water contaminant, through food and water may increase an older woman’s risk of thyroid disease, a recent study in Iowa finds. Public water supplies contaminated with nitrates increased the risk of thyroid cancer in the women. Eating nitrates from certain vegetables was also linked to increases in thyroid cancer and hypothyroidism, one type of thyroid disease. Nitrate is a common contaminant of drinking water, particularly in agricultural areas where nitrogen fertilizers are used. High rates of fertilizer application may also increase the natural nitrate levels found in certain vegetables, such as lettuce and root crops. In the body, nitrate competes with uptake of iodide by the thyroid, thus potentially affecting thyroid function. This is the first study to show a link between nitrates and thyroid cancer in people, although nitrates have been shown to cause thyroid tumors in animal studies. Researchers at the National Institute of Health, in a study entitled, ”Nitrate intake and the risk of thyroid cancer and thyroid disease,” investigated the association of nitrate intake from public water supplies and diet with the risk of thyroid cancer and self-reported hypothyroidism and hyperthyroidism in a cohort […]

(Beyond Pesticides, July 6, 2010) A review report published last Friday highlights that some research studies indicate that pesticide exposure either prior to conception, during pregnancy or during childhood appears to increase the risk of childhood cancer, with maternal pesticide exposure during pregnancy being most consistently associated with childhood cancer. Furthermore, the report notes that several studies indicate that farmers are at greater risk of developing certain cancers than the general population. In particular, several studies strongly suggest that pesticide exposures are associated with some cases of non-Hodgkin’s lymphoma (NHL), leukemia, prostate cancer and other hormone related cancers. The report, A Review of the Role Pesticides Play in Some Cancers: Children, farmers and pesticide users at risk?, is published by the United Kingdom organization CHEM (Chemicals, Health and Environment Monitoring) Trust. “Pesticide exposures may interact with other chemical exposures and genetic factors, to cause cancer. Research suggests that pregnant women, in particular, should avoid direct exposure to pesticides, if possible,” said Gwynne Lyons, Director of CHEM Trust and report co-author. “It is high time that the UK was more supportive of EU proposals to take a tougher approach to reducing exposure to potentially harmful chemicals. If the UK is to […]

(Beyond Pesticides, June 24, 2010) Our food purchases have a direct effect on the health of our environment and those who grow and harvest what we eat. Beyond Pesticides launched its Organic Food: Eating with a Conscience guide, which shows consumers why, according to the group, “food labeled organic is the right choice.” Jay Feldman, executive director of Beyond Pesticides, said, “In addition to serious health questions linked to actual residues of toxic pesticides on the food we eat, our food buying decisions support or reject hazardous agricultural practices, protection of farmworkers, and stewardship of the earth.” The Eating with a Conscience guide explains to consumers the effect they are having on health and the environment when they purchase food grown with chemical-intensive methods, even if a large number of residues do not remain on the finished food product. The group points to USDA organic certification as “the only system of food labeling that is subject to independent public review and oversight, assuring consumers that toxic, synthetic pesticides used in conventional agriculture are replaced by management practices focused on soil biology, biodiversity, and plant health.” “Organic practices under the Organic Foods Production Act eliminate commonly used toxic chemicals in the […]

(Beyond Pesticides, June 16, 2010) Men with certain genetic variations who were exposed to some toxic pesticides that are now largely banned run an increased risk of developing Parkinson’s disease, French scientists said Monday. In a study published in Archives of Neurology, entitled “Interaction Between ABCB1 and Professional Exposure to Organochlorine Insecticides in Parkinson Disease,” French researchers found that among men exposed to pesticides such as DDT, carriers of the gene variants are three and a half times more likely to develop Parkinson’s than those with the more common version of the gene. The scientists think the brains of people with the gene variant fail to flush out toxic chemicals as efficiently as those with common versions of the gene, suggesting that environmental as well as genetic factors are important in the risk of Parkinson’s. Alexis Elbaz, MD, PhD and Fabien Dutheil, PhD, of France’s National Institute for Health and Medical Research (INSERM) studied 101 men with Parkinson’s and 234 without the disease to look at links between organochlorine exposure and Parkinson’s disease. The study includes only men, and all of them had high levels of exposure to pesticides through their work as farmers. The scientists found the link was […]

(Beyond Pesticides, June 2, 2010) After decades-long litigation over the use of the toxic pesticide dibromochloropropane, or DBCP, in the 1970’s which has been linked to sterility and has since been banned, Dole Food Co. is proposing new settlements for farm workers claiming they were injured by exposure to the pesticide. A request has been filed by lawyers for Dole in the Los Angeles Superior Court asking that nearly 1,500 Honduran farm workers who are suing Dole be allowed to drop out of those suits and settle their claims out of court under an existing program arranged by the company and Honduran government officials. This could potentially end years of legal action inexpensively for Dole while providing compensation to workers quickly, however some people view this plan as a way for the company to back out of its responsibilities to former plantation workers. The pesticide DBCP was used by workers from Nicaragua, Costa Rica, Guatemala, Honduras, and Panama to kill worm infestations in the trees’ roots. In the U.S., DBCP was used as a soil fumigant and nematocide on over 40 different crops until 1977. According to the U.S. Environmental Protection Agency (EPA), DBCP causes male reproductive problems, including low […]

(Beyond Pesticides, May 28, 2010) The repeated exposure to organophosphate and organochlorine insecticides can increase the risk of developing Alzheimer’s Disease (AD) or dementia later in life according to a new study published in the May issue of Neurology. The observational study entitled “Occupational exposure to pesticides increases the risk of incident AD” is one of very few studies to examine a link between pesticides and AD. Researchers lead by Kathleen M. Hayden, PhD of Duke University Medical Center examined residents 65 years and older from an agricultural community in Cache County Utah. Participants were assessed for cognitive ability at the inception of the study and again after 3, 7, and 10 years. Data showed that those repeatedly exposed to any pesticides were more likely to develop AD or dementia. Researchers found a higher incidence of AD among those exposed to organophosphates and organochlorines. The risk of AD associated with organophosphate exposure was slightly higher than the risk associated with organochlorines. Researchers also found an increase in dementia among those exposed to organophosphates or organochlorines; however this increase was not statistically significant. Dr. Hayden said that more research was necessary to determine a causal link. Organophosphates are known to reduce […]

(Beyond Pesticides, May 25, 2010) An analysis of 266 potential environmental contributors to type 2 diabetes published May 20, 2010 in the online edition of the journal PLoS ONE, links the disease to individuals who have higher levels of polychlorinated biphenyls (PCBs) and the pesticide heptachlor, as well a form of vitamin E found at high levels in soybean and corn oil, in their bodies compared to the general population. PCB was banned in 1979 and most uses of heptachlor were canceled between 1978 and 1989 (except for limited control of fire ants, which continues), but the compounds persist in the environment, especially near former industrial sites or contaminated soil. Environmentalists point to the fact that chemicals banned decades ago are still increasing people’s risk of disease, as a reason to take a precautionary approach when evaluating and registering chemicals. The analysis, led by Atul Butte, MD, PhD, assistant professor of medical informatics and pediatrics at the Stanford University School of Medicine, drew on data collected by the Centers for Disease Control and Prevention as part of the National Health and Nutrition Examination Survey (NHANES) to examine a wide range of environmental influences on type 2 diabetes. Dr. Butte conceived […]

(Beyond Pesticides, May 18, 2010) A team of scientists from the University of Montreal and Harvard University have discovered that exposure to organophosphate pesticides is associated with increased risk of Attention-Deficit Hyperactivity Disorder (ADHD) in children. Using data from the National Health and Nutrition Examination Survey, the study focused on 1,139 children from the general U.S. population and measured pesticide breakdown product levels in their urine. The authors conclude that exposure to organophosphate (OP) pesticides, at levels common among U.S. children, may contribute to a diagnosis of ADHD. “Previous studies have shown that exposure to some organophosphate compounds cause hyperactivity and cognitive deficits in animals,” says lead author Maryse F. Bouchard, a professor at the University of Montreal Department of Environmental and Occupational Health and scientist at the Sainte-Justine Hospital Research Center. “Our study found that exposure to organophosphates in developing children might have effects on neural systems and could contribute to ADHD behaviors, such as inattention, hyperactivity, and impulsivity.” Marc Weisskopf, PhD, ScD, another study author told Reuters, “What this paper specifically highlights is that this may be true even at low concentrations.” For children with a 10-fold increase in the concentration of the most common dialkyl phosphate metabolites […]

(Beyond Pesticides, May 11, 2010) Even with the growing body of evidence linking environmental exposures to cancer in recent years, a report released May 6, 2010 by the President’s Cancer Panel finds that the true burden of environmentally-induced cancer is greatly underestimated. The Panel’s report, Reducing Environmental Cancer Risk: What We Can Do Now, concludes that while environmental exposure is not a new front on the war on cancer, the grievous harm from this group of carcinogens has not been addressed adequately by the nation’s cancer program. “There remains a great deal to be done to identify the many existing but unrecognized environmental carcinogens and eliminate those that are known from our daily lives — our workplaces, schools and homes,” said LaSalle D. Leffall, Jr., M.D., chair of the Panel. “The increasing number of known or suspected environmental carcinogens compels us to action, even though we may currently lack irrefutable proof of harm,” he added. Beyond Pesticides applauds the chairman’s precautionary approach and encourages President Obama to heed the panel’s call to “use the power of your office to remove the carcinogens and other toxins from our food, water, and air that needlessly increase health care costs, cripple our Nation’s […]

(Beyond Pesticides, April 19, 2010) Mississippi Governor Haley Barbour last week signed a childhood asthma management and prevention bill into law that includes provisions requiring all public school districts to implement an Integrated Pest Management (IPM) program and prohibiting the use of hazardous substances such as cleaning products and pesticides. Although the bill reads as though it will do a lot for children with asthma, with regard to the actual eliminatiion or significant reduction of toxic pesticide use at schools, the bill is weakly worded and will need strong regulations to be meaningful in protecting children from pesticide-asthma triggers. Specifically, this new law, effective July 1, 2010, requires schools to allow students to self-administer asthma and anaphylaxis medication; recommends students with asthma to have an Asthma Action Plan on file at the school; provides training for teachers, nurses, and all other school staff on asthma; requires buses to minimize idling time; requires local school health councils to adopt and support the implementation of a local school wellness policy that includes minimizing children’s exposure to pollutants that can aggravate asthma and prohibits the use of hazardous substances such as cleaning products and pesticides in and around school buildings during the hours […]

(Beyond Pesticides, April 16, 2010) Every day, children still die of malaria, a devastating disease that is both preventable and curable. In 2009, the United Nations Environment Program (UNEP) and the World Health Organization (WHO) announced a renewed international effort to combat malaria with an incremental reduction of the reliance on the synthetic pesticide DDT. However, efforts to invest in real solutions are often derailed by those promoting DDT as a “silver bullet” for malaria prevention. Tell President Obama that the President’s Malaria Initiative must invest in safe solutions to malaria, not increase reliance on DDT. Sign by April 22nd and you will be included in the petition to mark World Malaria Day. Sign the petition here. DDT, or dichloro diphenyl trichloroethane, while highly persistent in the environment, was initially found to be effective against mosquitoes and the diseases they carry, such as malaria. However, insect resistance to the chemical has been documented since 1946. DDT was banned in the U.S. in 1972 after it was linked to the decline of the bald eagle and other raptors, and it continues to be linked to health problems. A 2007 study finds that women who were exposed to DDT before the age […]

(Beyond Pesticides, April 12, 2010) Environmental, public health, labor and farmworker advocacy organizations from across the country have filed a petition asking the U.S. Environmental Protection Agency (EPA) to rescind the Bush administration era approval of the highly toxic fumigant pesticide methyl iodide in light of troubling new findings uncovered in California studies. The petition was submitted on the birthday of famed farmworker rights advocate Cesar Chavez, who drew national attention to pesticide misuse on grapes in the 1980s. “In 1988, Cesar Chavez again put his life on the line to draw attention to farmworker rights when he protested the use of pesticides with a 36-day, water-only fast,” said Jeannie Economos, Pesticide Safety and Environmental Health Project Coordinator at Farmworker Association of Florida. “Over 20 years later, we should not have to be fighting the same battles. Methyl iodide use takes us in the dead wrong direction for workers, public health and the future of agriculture.” The movement to ban methyl iodide follows the legacy of Cesar Chavez: the pesticide poses significant, direct risks to farmworkers, their families and neighboring communities. Methyl iodide is a water contaminant, nervous system poison, thyroid toxicant and is listed on California’s Proposition 65 list […]

(Beyond Pesticides, April 1, 2010) While most previous literature on melanoma has focused on host factors and sun exposure, new research shows a link between several pesticides and this deadly form of skin cancer. Epidemiologists from University of Iowa, the National Institute of Environmental Health Sciences and National Cancer Institute found that agricultural workers who apply certain pesticides to farm fields are twice as likely to contract melanoma, providing support for the hypotheses that agricultural chemicals may be another important source of skin cancer risk. The study, “Pesticide use and cutaneous melanoma in pesticide applicators in the Agricultural Heath Study” was published last month in the journal Environmental Health Perspectives. It examines cancer rates in 56,285 pesticide applicators in Iowa and North Carolina as part of the federal government’s Agricultural Health Study, a large, long-term study of pesticide applicators and their spouses. Researchers asked the pesticide applicators how often they were exposed to 50 pesticides and compared their cancer rates. Each person’s exposure was then approximated by adding up the total days that the workers had been exposed and using information from survey results on how the chemicals were applied and what protective equipment was being used. The pesticides that […]

(Beyond Pesticides, March 29, 2010) Prenatal exposure to pesticides at levels that do not cause adverse health effects in the mother can lead to delayed brain developmental in the child, according to the new study, “Neurobehavioral Deficits and Increased Blood Pressure in School-Age Children Prenatally Exposed to Pesticides,” published last month in the early online edition of the journal Environmental Health Perspectives. Many pesticides are suspected of being capable of damaging the nervous system, in particular the development of a child’s brain during pregnancy and the early postnatal years of life. Now an international research team led by Philippe Grandjean, M.D., from the University of Southern Denmark and Harvard School of Public Health, has shown a delayed brain development up to two years in school children, whose mothers worked in a greenhouse during pregnancy. The exposed children also had increased blood pressure, while the mothers do not suffered adverse symptoms themselves. “The results support the notion that, in this cohort of children, prenatal exposures to pesticides are more harmful than current exposures, thereby confirming previous results of other environmental studies of neurodevelopmental toxicity and the theory of window of vulnerability of central nervous system during uterine life,” write the authors. […]

(Beyond Pesticides, March 26, 2010) A new study by researchers at Columbia University’s Mailman School of Public Health has linked exposure to the insecticide chlorpyrifos to early childhood developmental delays. Chlorpyrifos is a broad spectrum organophosphate insecticide that was banned for household use in 2001, but is still widely used in agriculture. The study, entitled “Chlorpyrifos Exposure and Urban Residential Environment Characteristics as Determinants of Early Childhood Neurodevelopment,” was published online and will be published in print in the may issue of the American Journal of Public Health. The study examined 266 children born between 1998 and 2002 living in low income neighborhoods of the South Bronx and Northern Manhattan in New York City. Before being banned chlorpyrifos was widely used in these areas. Of the children studied, 47% were male, 59% were Dominican and 41% were African American. Researchers compared motor and mental development to levels of exposure to the pesticide at birth. They found that high concentrations of chlorpyrifos in umbilical cord blood (>6.17 pg/g) corresponds to a 6.5 point decrease in the Psychomotor Development Index, and a 3.3 point decrease in the Mental development index in 3 year olds. Previous research published in 2006 on the same […]

(Beyond Pesticides, February 25, 2010) To include more grassroots activists and community members in Greening the Community: Green economy, organic environments and healthy people, Beyond Pesticides announced a new $25 “recession rate.” The conference, Beyond Pesticides’ 28th National Pesticide Forum, will be held April 9-10 at Case Western Reserve University in Cleveland, Ohio. To take advantage of the reduced registration, register online today. We are also pleased to announce exciting additions to our speaker list including: journalist, author, democracy and environmental activist Harvey Wasserman; ecologist, ecological engineer and 2004 Stockholm Water Prize laureate William Mitsch, PhD; and several others. These speakers join Jeff Moyer, organic farming and gardening expert with the Rodale Institute; Melinda Hemmelgarn, award-winning “Food Sleuth” journalist who encourages people “think beyond their plates”; David Hackenberg, beekeeper who first discovered colony collapse disorder; Canadian organizers who played a key role in the effort that banned cosmetic pesticide use in Ontario in 2009; and, cutting-edge scientists focusing on endocrine disruption, cancer, learning disabilities, and the link between birth defects and season of conception. Harvey Wasserman is a journalist, author, democracy activist and environmental advocate. He is author of a dozen books, including Solartopia! Our Green Powered Earth. Harvey helped […]