(Beyond Pesticides, September 24, 2010) Researchers from Virginia Tech discovered, for the first time, a way to detect nanosilver particles in the environment, finding that the particles leaching from consumer products can transform into silver sulfide in sewer sludge. Despite their widespread use, scientists still know very little about how nanomaterials move from consumer manufactured products into the environment and what impact they might have. These findings provide new information about the life cycle of silver nanoparticles, which are used in a number of consumer products as antimicrobial agents, including cosmetics, sunscreens, sporting goods, clothing, electronics, baby and infant products, food, and food packaging. Previous studies have shown that the particles, which are between one and 100 nanometers in size and smaller than many viruses, can enter the environment through wastewater, where they can accumulate in biosolids at wastewater treatment plants. These biosolids, also known as sewage sludge, are often sold to consumers as fertilizer, despite the fact that they can contain toxic contaminants, including another antibacterial, triclosan, which was recently found to persist in the environment. Nanosized particles can be released from impregnated materials via washing or or as a result of sweating, posing unknown adverse effects to humans […]

(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 3, 2010) A new study shows that due to a flaw in standard risk assessments, which consider toxic effects at fixed exposure times, the risks posed by the neonicotinoid pesticides imidacloprid and thiacloprid are likely to be underestimated. The authors believe that minute quantities of imidicloprid may be playing a much larger role in killing bees over extended periods of time than previously thought. The study, “The significance of the Druckrey—Küpfmüller equation for risk assessment””The toxicity of neonicotinoid insecticides to arthropods is reinforced by exposure time,” was published online July 23, 2010 in the journal Toxicology. The authors believe that standard risk assessment calculations underestimate toxicity because they do not accurately account for the interplay of time and level of exposure. According the study: The essence of the Druckrey—Küpfmüller equation states that the total dose required to produce the same effect decreases with decreasing exposure levels, even though the exposure times required to produce the same effect increase with decreasing exposure levels. Druckrey and Küpfmüller inferred that if both receptor binding and the effect are irreversible, exposure time would reinforce the effect. The Druckrey—Küpfmüller equation explains why toxicity may occur after prolonged exposure to very low toxicant […]

(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, April 22, 2010) In a new consumer factsheet posted April 8, 2010, the U.S. Food and Drug Administration (FDA) attempts to moderate the position it took in a February 23, 2010 letter to Congress in which it said, “[E]xisting data raise valid concerns about the effects of repetitive daily human exposure to these antiseptic ingredients” and “FDA shares your concerns over the potential effects of triclosan and triclocarban as endocrine disruptors that has emerged since we issued the TFM [Tentative Final Monograph] in 1994.” Instead, in bureaucractic-speak FDA is now saying, “[T]riclosan is not currently known to be hazardous to humans.” Safety advocates say that the FDA’s latest statement creates public confusion as the triclosan market continues to grow and manufacturers in the soap and cosmetics industry daily push misleading advertising claims about the protection from bacteria attributed to the toxic ingredient triclosan. While equivocating on the science on triclosan’s adverse effects, FDA does question the efficacy of the widely marketed triclosan products with the statement, “At this time the agency does not have evidence that triclosan in antibacterial soaps and body washes provides any benefit over washing with regular soap and water.” The new FDA factsheet, featured […]

(Beyond Pesticides, April 9, 2010) U.S. Representative Edward J. Markey (D-Mass), Chairman of the Energy and Environment Subcommittee of the Energy and Commerce Committee, yesterday called for a ban on many applications of the antimicrobial chemical triclosan ””which is found in many consumer soaps and countless other products ranging from toys to lipstick. Rep. Markey called for the ban in conjunction with the release of correspondence from the Food and Drug Administration (FDA) and the Environmental Protection Agency (EPA) that raise serious concerns regarding the use of the chemical triclosan. In response to the FDA and EPA letters, Chairman Markey also announced plans to introduce legislation that will accelerate the evaluation and regulation of substances such as triclosan that may harm the human endocrine system. “Despite the fact that this chemical is found in everything from soaps to socks, there are many troubling questions about triclosan’s effectiveness and potentially harmful effects, especially for children,” said Chairman Markey. In January 2010, Chairman Markey sent letters of concern regarding triclosan to FDA and to EPA. In FDA’s response letter to Chairman Markey, the FDA stated that, “existing data raise valid concerns about the [health] effects of repetitive daily human exposure to these […]

(Beyond Pesticides, March 16, 2010) The New Hampshire House of Representatives passed a measure last week to study the passage of a bill, HB 1456, that would establish a New Hampshire General Court committee to study the use of pesticides and their alternatives in areas where children may be exposed. Yes, that’s right; they passed a bill to study a study bill. The House majority committee proposed the interim study bill as an alternative to seeking a floor vote on HB 1456 itself because of the bill opponents’ view that the safety of pesticides is unquestionable and fear that HB 1456 would lead to a moratorium on lawn pesticides, much like what has been done throughout Canada. HB 1456 is the first state bill in the country to be successfully introduced and have a hearing with intent to restrict toxic pesticide use on public and private property, showing the momentum that is building throughout the country on this issue. At the House Environment and Agriculture Committee hearing on HB 1456 in February, the issue of studying the impact of pesticides, mainly herbicides, on children where they are commonly used in residential neighborhoods, on school grounds, playgrounds, and other places where […]

(Beyond Pesticides, March 11, 2010) The New York State Department of Environmental Conservation (DEC) determined that a pair of bald eagles were killed and a host of other wildlife were injured after an Allegany County farmer applied a highly toxic pesticide that has been canceled for use by the U.S. Environmental Protection Agency (EPA). Following an investigation, the state DEC determined that the two bald eagles were poisoned after ingesting the improperly applied pesticide Furadan, or carbofuran, on his farm. The farmer and landowner, Richard Sekoll, was charged with and pleaded guilty to violating state pesticide laws and fish and wildlife laws and paid $3,000 in fines. After receiving a call that two dead bald eagles were found near the Genesee River last fall, DEC began an investigation and sent the eagles to the department’s Wildlife Pathology Unit. Lab results showed that the birds died of poisoning from consumption of carbofuran, which occurred after the eagles consumed prey that had ingested the pesticide. State officials with the DEC’s Division of Pesticides and the Division of Wildlife, as well as the U.S. Fish and Wildlife Service assisted in the investigation, which found that a farm within 500 yards of where the […]

(Beyond Pesticides, March 8, 2010) Twenty local businesses and organizations around New Brunswick, New Jersey announced their commitment to not purchase, use or sell products that contain triclosan, an antimicrobial pesticide shown to pose risks to both human health and the environment. Last week, the national consumer advocacy group Food & Water Watch convened an event with the businesses and organizations as part of its “Wash Your Hands of Triclosan” campaign. Speakers additionally expressed support for a proposed Highland Park ordinance to ban the municipal purchase of products containing triclosan, which will be discussed at the Highland Park Board of Health’s meeting on March 11. The community support behind prohibiting triclosan products is a strong indication of an increasing public rejection of the chemical. Originally developed as an anti-bacterial agent for hospital settings, triclosan is widely found in many consumer and household products ranging from dish soaps and detergents to toothpastes, deodorants, and others. A known endocrine disruptor, triclosan has been linked to antibiotic resistance, and can affect male and female reproductive hormones, which could potentially increase risk for cancer. Due to its prevalence in so many products, triclosan is now showing up in many things, from human breast milk […]

(Beyond Pesticides, March 2, 2010) A lawsuit filed March 1, 2010 in federal court against the U.S. Fish and Wildlife Service seeks to compel the Service to uproot genetically engineered (GE) crops from its Bombay Hook National Wildlife Refuge in Delaware. As many as 80 other national wildlife refuges across the country now growing GE crops are vulnerable to similar suits. Filed in the U.S. District Court for Delaware by the Widener Environmental and Natural Resources Law Clinic on behalf of Delaware Audubon Society, Public Employees for Environmental Responsibility (PEER) and the Center for Food Safety, the federal suit charges that the Fish & Wildlife Service had illegally entered into Cooperative Farming Agreements with private parties, allowing hundreds of acres to be plowed over without the environmental review required by the National Environmental Policy Act (NEPA). In March 2009, the same groups won a similar lawsuit against GE plantings on Prime Hook National Wildlife Refuge. Ironically, Prime Hook has now been administratively incorporated into Bombay Hook, meaning that the same refuge management that is overseeing execution of the Prime Hook verdict is violating its tenets on Bombay Hook. In August 2009, several environmental groups led by the Center for Food […]

(Beyond Pesticides, February 24, 2010) On February 22, 2010 the U.S. Food and Drug Administration (FDA) issued a federal notice requesting data and information regarding the potential environmental impact of triclosan’s use in acne and antiplaque/antigingivitis products. The agency, in order to comply with the National Environmental Protection Act (NEPA), must complete environmental assessments (EA) for active ingredients before they are included in the agency’s over-the-counter (OTC) drug regulation system. Triclosan, a controversial antibacterial agent found in hundreds of consumer products, from hand sanitizers to toys, is one of 13 chemicals being assessed by FDA for environmental impacts according to their proposed uses. According to FDA regulations, the agency must conduct EAs before chemicals are approved for use in OTC drug products. In this case, triclosan is being considered for use in acne and antiplaque/antigingivitis products. Even though this action is being taken, FDA has never been able to finalize and approve the use of triclosan in any OTC products, despite the proliferation of these products in the consumer marketplace. It appears that EAs for the vast majority of triclosan uses have been completed. Other FDA regulations on triclosan have not been updated since 1994 and much of the data […]

(Beyond Pesticides, February 19, 2010) To protect humans and the environment from the drift of pesticide spray and dust the U.S. Environmental Protection Agency (EPA) proposed new labeling guidelines last November and is seeking public comments. The Draft Guidance for Pesticide Registrants on Pesticide Drift Labeling is intended to provide clearer, more consistent and enforceable directions. EPA’s current pesticide label requirement, which instructs the user to avoid drift, is widely considered unenforceable and inadequate. Pesticides drift is a major threat to those living near agricultural areas, as wind and rain can carry these chemicals miles from the application site. A National Cancer Institute study shows that pregnant women living within 9 miles of farms where pesticides are used have an increased risk of losing an unborn baby to birth defects. Another study finds that children living near agricultural areas have twice the risk of developing acute lymphoblastic leukemia. When pest management strategies rely on spray and dust pesticide application, drift is inevitable. Aerial pesticide application is of greatest concern, where an estimated 40% of pesticides used are lost to drift. Despite this inefficiency the aerial application of pesticides. especially fungicides, is actually increasing. EPA’s labeling guidelines were introduced a month […]

(Beyond Pesticides, February 4, 2009) The Obama Administration proposed a budget of $10 billion for the U.S. Environmental Protection Agency (EPA), which represents an overall cut of $300 million from its 2010 fiscal year budget. However, within its $10 billion budget EPA is proposing a $43.5 million in new funding for climate regulatory efforts in fiscal 2011. Overall, $1.1 billion is devoted to EPA’s clean air and global climate change program – one of five funding priorities for the agency – that represents about 12 percent of the agency’s budget. Of that, the proposal sets aside $169 million to reducing greenhouse gas emissions. The budget would also add $13 million for the Chesapeake Bay. Last year, the Obama administration promised an overhaul of the EPA-led cleanup program, which despite 25 years of effort and billions of dollars failed to improve the bay’s problems with low-oxygen “dead zones.” “To meet our environmental challenges and ensure fiscal responsibility, we’re proposing targeted investments in core priorities. This budget cuts spending while promoting clean air, land and water, growing the green economy and strengthening enforcement,” said Administrator Lisa Jackson. “The president’s budget is focused on creating the conditions that help American families, communities and […]

(Beyond Pesticides, December 15, 2009) Exposure to the endocrine-disrupting herbicide atrazine triggers the release of stress hormones in rats, according to a new study published in the December 2009 issue of the journal Toxicological Sciences. The researchers believe this may explain how the popular weed killer produces some its harmful reproductive effects. The study, “Characterization of the Hypothalamic-Pituitary-Adrenal Axis Response to Atrazine and Metabolites in the Female Rat,” was conducted by the Environmental Protection Agency’s (EPA) National Health and Environmental Effects Research Laboratory. According to a December 4 analysis by Environmental Health Sciences, a foundation-funded journalism organization, the researchers discovered that female rats fed atrazine at the time of ovulation released a flow of stress hormones that are known to interfere with hormones essential for reproduction. The findings reveal one way atrazine may impact female reproduction. Elevated stress hormones can disrupt the hormone signals that spur ovulation. Such a stress response to atrazine could partially explain why previous studies find that the herbicide inhibits reproduction. The stress reaction is similar to that seen when the animals are restrained against their will. One of the most widely used agricultural pesticides in the U.S., atrazine can currently legally be applied before and […]

(Beyond Pesticides, December 10, 2009) Following news that the Environmental Protection Agency (EPA) is considering a higher uncertainty factor in all pesticide risk determinations, the agency is making available for comment a policy paper entitled “Revised Risk Assessment Methods for Workers, Children of Workers in Agricultural Fields, and Pesticides with No Food Uses.” The paper describes how EPA will assess pesticide risks not governed by Food Quality Protection Act (FQPA) amendments to the Federal Food, Drug and Cosmetic Act (FFDCA). EPA describes its proposal as incluing a more thorough assessment of risks to workers, including farmworkers and farm children, as well as risks posed by pesticides that are not used on food. The agency is asking the public to comment on the new approach and how best to implement the improvements. “Better information and applying these tools will strengthen EPA’s protections for farm workers exposed to these chemicals, and children living in and around the areas of highest possible exposure,” says EPA Administrator Lisa P. Jackson. “It’s essential we have the tools to keep everyone, especially vulnerable populations like children, safe from the serious health consequences of pesticide exposure.” EPA licenses or registers pesticides for sale and distribution under the […]

(Beyond Pesticides, November 24, 2009) The Environmental Protection Agency (EPA) is considering expanding to all pesticides the use of what is typically referred to as the Food Quality Protection Act (FQPA) safety factor (the allowable margin of error or the uncertainty factor in risk determinations), which is currently only applied to the agency’s pesticide evaluations for infants and children. Under the plan the increased uncertainty factor will be applied to other sensitive populations, including farmworkers. Beyond Pesticides learned of the plan through communications with the agency over the past several months. EPA officials told Beyond Pesticides that, under the Obama Administration leadership, the agency would like to apply an equal standard to all people living in the U.S. Beyond Pesticides called on the Obama Administration to protect farmworkers and their children in the Transforming Pesticide Policy document sent after the 2008 election to President Obama’s transition team and top agency officials. Applying an additional uncertainty factor in risk assessments affecting infants and children and a reassessment of all existing pesticide tolerances were touted as the centerpieces of FQPA, which passed and amended the Federal Insecticide Fungicide and Rodenticide Act (FIFRA), the federal pesticide law, in 1996. The legislation gained momentum […]

(Beyond Pesticides, November 19, 2009) A three-year old child in Kenya died after eating the highly toxic pesticide carbofuran, according to a report attributed to the boy’s father, Nahashon Kigai. He said in an interview that, while he knew Furadan was toxic for pests, he had no idea it was so harmful to humans. Mr. Kigai said he had purchased Furadan a few months ago in preparation for planting vegetables at his small farm. Carbofuran is sold in Kenya in both a liquid form and a more widely available granular form, which farmers sprinkle around their seeds when planting crops. “I am sure he ate it, because he had [the pesticide] in his hand and in his mouth,” Mr. Kigai said. Mr. Kigai had put the Furadan into a small container, which his son later found. Soon after Kimutai apparently ate the Furadan, the boy began to show signs of paralysis and later became unconscious. Carbofuran is a toxic insecticide that does not meet current U.S. food safety standards, and the U.S. Environmental Protection Agency (EPA) is moving forward to implement the agency’s May 2009 final rule revoking tolerances, or residue limits, for the pesticide carbofuran. EPA says that it […]

(Beyond Pesticides, November 18, 2009) A report released yesterday and authored by Charles Benbrook, PhD, chief scientist at The Organic Center (TOC), finds that the rapid adoption by U.S. farmers of genetically modified corn, soybeans and cotton has promoted increased use of pesticides, an epidemic of herbicide-resistant weeds, and more chemical residues in foods. The report, “Impacts of Genetically Engineered Crops on Pesticide Use in the United States: The First Thirteen Years,” explores the impact of the adoption of genetically modified (GM) corn, soybean, and cotton on pesticide use in the United States, drawing principally on data from the U.S. Department of Agriculture (USDA). The most striking finding, is that GM crops have been responsible for an increase of 383 million pounds of herbicide use in the U.S. over the first 13 years of commercial use of GE crops (1996-2008). The report identifies, and discusses in detail, the primary cause of the increase–the emergence of herbicide-resistant weeds. The steep rise in the pounds of herbicides applied with respect to most GM crop acres is not news to farmers. Weed control is now widely acknowledged as a serious management problem within GM cropping systems. The rise in herbicide use comes as […]

(Beyond Pesticides, November 17, 2009) According to a new study by researchers at the University of Wisconsin-Madison, exposure to low levels of the organophosphate insecticide chorpyrifos during pregnancy can impair learning, change brain function and alter thyroid levels of offspring into adulthood for tested mice, especially females. The study, “Long-term sex selective hormonal and behavior alterations in mice exposed to low doses of chlorpyrifos in utero,” was led by Beyond Pesticides board member and professor of zoology and environmental toxicology, Warren Porter, PhD. Read the full analysis of the study on the Rodale Institute website. On June 8, 2000, the Environmental Protection Agency (EPA) and Dow AgroSciences, reached an agreement to stop the sale of most home, lawn and garden uses for chlorpyrifos because of its health risks to children. However, its use continues in agriculture. According to advocates, this new study provides further evidence for the need to ban chlorpyrifos and fully protect farmworkers, their families, and rural communities from the toxic hazards of this outdated, unnecessary pesticide. According to the Rodale Institute, which provided part of the funding for the study, “The new animal study accentuates the risk of ultra-low levels of the common pesticide chlorpyrifos to cause […]

(Beyond Pesticides, November 9, 2009) One out of every four farmers who plants genetically engineered (GE) corn is failing to comply with at least one important insect-resistance management requirement, which increases the likelihood that pesticide-resistant bugs will threaten the future of organic crops, conventional crops and other biotech crops. That finding comes in a new report, Complacency on the Farm, by the Center for Science in the Public Interest (CSPI). According to CSPI, in 2008, 57 percent of the corn acreage in the United States was planted with corn spliced with genes from the Bacillus thuringiensis bacterium, or Bt. Those crops produce natural toxins that are harmless to humans but will kill corn rootworms and corn borers, which otherwise reduce crop yields. Farmers who plant such crops are supposed to plant a refuge of conventional corn in, adjacent to, or near the GE crop. That refuge is designed to reduce the risk that pests that survive the toxin will breed with each other and produce resistant offspring. Resistant offspring would not only reduce yields of the Bt crops, but could also threaten organic or conventional farmers who use natural Bt-based pesticides on non-GE crops. Depending on the location of the […]

(Beyond Pesticides, November 5, 2009) The U.S. Environmental Protection Agency (EPA) has rolled out proposed guidance for new pesticide labeling in an effort to reduce off-target spray and dust drift. According to EPA, the actions detailed in the draft Pesticide Registration (PR) Notice on Pesticide Drift Labeling, when implemented, are projected to help improve the clarity and consistency of pesticide labels and help prevent harm from spray drift. The agency is also requesting comment on a petition to evaluate children’s exposure to pesticide drift. Last month, a petition filed by Earthjustice and Farmworker Justice asked EPA to set safety standards protecting children who grow up near farms from the harmful effects of pesticide drift. The groups also asked the agency to adopt an immediate no-spray buffer zone around homes, schools, parks and daycare centers for the most dangerous and drift-prone pesticides. According to the agency, the new instructions are said to prohibit drift that could cause “adverse health or environmental effects,” by evaluating scientific information on risk and exposure based on individual product use patterns on a pesticide-by-pesticide basis. These assessments will help the agency determine whether no-spray buffer zones or other measures, such as restrictions on droplet or particle […]

(Beyond Pesticides, October 7, 2009) The U.S. Environmental Protection Agency (EPA) is establishing a new transparent process that will allow the public to review and comment on risk assessments and proposed registration decisions for pesticides. This expanded process will apply to all new pesticide active ingredients and first food uses, first outdoor uses, and first residential uses. It is not clear at this writing whether the agency will at the same time release the underlying test data on potential adverse health effects that companies submit for product registration. Starting October 1, 2009, the public will be able to review and comment on the risk assessments and proposed registration decisions for certain pesticide registration actions. Upon receiving a complete application for registration for a new pesticide active ingredient or a new use of an already registered active ingredient, EPA will publish a Federal Register Notice of Receipt, establish a case docket in regulations.gov, and open an initial 30-day public comment. Following the comment period, EPA will publish its decision and a response-to-comment document. Once the agency’s risk assessments and proposed decision for the registration application are added to the docket, EPA will open another 30-day public comment period. After the final […]

(Beyond Pesticides, September 21, 2009) In a federal lawsuit filed in San Francisco earlier this month, the environmental watchdog group Ecological Rights Foundation (ERF) claims that dioxin is being discharged from Pacific Gas and Electric Company’s (PG&E) utility poles into the San Francisco Bay, violating both the Clean Water Act and the Resource Conservation and Recovery Act. Dioxin is a contaminant in the wood preservative pesticide pentachlorophenol (penta), the chemical used to treat more than one million PG&E utility poles in Northern California. Dioxin is a known human carcinogen. It also causes birth defects at extremely low levels. The ERF suit asks the court to stop PG&E from discharging dioxin from its utility poles, a move that could eventually lead to wide scale replacement of the ubiquitous penta-treated wood poles. “These are the common, I guess you could say ‘classic,’ brown wood poles you see holding up wires on practically every street,” says ERF attorney Bill Verick. Pentachlorophenol (penta) is a chlorinated aromatic hydrocarbon, closely related to other chlorophenols, hexachlorobenzene, polychlorinated dibenzo-p-dioxins and furans, all of which are found in commercial grade penta, along with secret “inert” ingredients. It was 1978 when EPA began its review of wood preservatives, including […]