(Beyond Pesticides, August 14, 2008) The first report released by the National Marine Fisheries Service (NMFS) as a result of a lawsuit (NCAP et al. v. NMFS, No. 07-1791 RSL) settlement reveal “overwhelming evidence” to suggest that the pesticides chlorpyrifos, malathion, and diazinon increase the chance of extinction for protected salmon and steelhead. The report on the three pesticides and their effects on threatened fish is the first in what is expected to be a four year review process of 37 pesticides. “These are pesticides that EPA [the Environmental Protection Agency] has swept under the rug for years. These are three that stood out as the nastiest of the (pesticides) that are still in widespread use,” said Joshua Osborne-Klein, an attorney for Earthjustice who represented the plaintiff, Northwest Coalition for Alternatives to Pesticides (NCAP). The 377-page report is clear in its conclusion that current use patterns of these three toxic pesticides threaten the salmon and steelhead protected by the Endangered Species Act, but it does not delineate the next steps to reduce the risk. A report on mitigation measures, which could include restrictions or bans, is expected in the next few months. The timing of the report coincides with other […]

(Beyond Pesticides, June 20, 2008) University of Massachusetts (UMass) researchers have identified certain plants that can absorb excess pesticides from soil and prevent their runoff into adjacent waterways. Golf courses typically use considerable amounts of herbicides and fungicides to maintain perfectly manicured greens, much of which ends up polluting water and harming aquatic organisms. This study found that plants like blue flag iris can act as “living filters” on the edge of greens.“ Studies from golf greens have shown that five percent to ten percent of the total pesticides applied are lost in runoff. In worst case conditions, this figure can be as high as 30 percent,” says John Clark, Ph.D., a professor of veterinary and animal science and a principal investigator on the grant. “We have identified plant species that can reduce the amount of certain pesticides in soil by up to 94 percent in the greenhouse.” Blue flag iris reduced chlorpyrifos by 76 percent and levels of chlorothalonil by 94 percent after three months of growth. The study was funded by the UMass Amherst Environmental Institute, the Massachusetts Pesticide Analysis Laboratory, and the U.S. Golf Association. Interest in “greener” turf management practices have risen lately along with golf’s […]

(Beyond Pesticides, March 24, 2008) Scientists at the U.S. Geological Survey (USGS) announced that they have identified ten contaminants, including pesticides, in the Potomac River, which flows through downtown Washington, DC, that could be responsible for the alarming discovery of “intersex fish,” male fish producing eggs. The suspected chemicals include: atrazine, a common herbicide used in agriculture and on lawns that is already linked to sexual abnormalities in frogs; insecticides chlorpyrifos and endosulfan; the herbicide metolachlor; and two chemicals used to add fragrance to perfumes, soaps and other products, tonalide and galaxolide. To collect the samples, USGS scientists suspended a device intended to serve as a facsimile fish in the Potomac River near the Washington, DC’s Blue Plains sewage plant. The device had a plastic-coated tube, which simulated a fish’s permeable skin, and a layer of simulated fat. According to the Washington Post, the tests on this fake fat revealed a range of potentially worrisome pollutants. Most have been found in other streams around the U.S. “The types of things we’re finding are the types of things that are associated with everyday life,” David Alvarez, a U.S. Geological Survey research chemist who analyzed samples from the Potomac told the Washington […]

(Beyond Pesticides, March 20, 2008) A 2000-2005 U.S. Geological Survey (USGS) study, Pesticide Occurrence and Distribution in the Lower Clackamas River Basin, Oregon, 2000-2005, finds a variety of pesticides in river and tributary samples, along with trace-level detections of pesticides in treated drinking-water samples collected from a drinking-water treatment plant that uses the Clackamas River as a raw-water source. While the federal government is quick to point out that detections in drinking water are below existing Environmental Protection Agency (EPA) drinking-water standards and most river samples are below the agency’s aquatic life benchmarks, studies show hazardous endocrine-disrupting and immunosuppressive effects at extremely low levels — far below EPA standards. A total of 63 pesticide compounds were detected in 119 water samples collected during storm and non-storm conditions using low-level detection methods. More pesticides were detected in the tributaries than in the Clackamas River mainstem. One or more of 15 pesticides were detected in nine of 15 samples of drinking water. Environmental and public health advocates are concerned that these results add to a pattern of contamination across the country. USGS data released in 2008, shows widespread pesticide contamination in the Chesapeake Bay watershed, and a 2004 USGS report of nationwide […]

(Beyond Pesticides, March 13, 2008) Exposure to certain chemicals, including pesticides and nerve agents, explains the high rates of illness in Persian Gulf War Veterans, according to a new study published in the Proceedings of the National Academy of Sciences. Veterans from the 1990-91 conflict have a higher rate of chronic, multi-symptom health problems than either non-deployed personnel or those deployed elsewhere. Symptoms routinely reported by these veterans include fatigue, muscle or joint pain, memory problems, trouble sleeping, rash and breathing problems. Due to the findings, the study author, Beatrice Golomb, M.D., Ph.D., associate professor of medicine at the University of California, San Diego School of Medicine, warns of the potential risk to civilians exposed to pesticides.“Health issues among Gulf War veterans have been a concern for nearly two decades. Now, enough studies have been conducted, and results shared, to be able to say with considerable confidence that there is a link between chemical exposure and chronic, multi-symptom health problems,” said Dr. Golomb. “Furthermore, the same chemicals affecting Gulf War veterans may be involved in similar cases of unexplained, multi-symptom health problems in the general population.”The study synthesized evidence regarding a class of chemicals known as acetylcholinesterase inhibitors (AchEs), including […]

(Beyond Pesticides, March 11, 2008) A Decade of Children’s Health Research: Highlights from EPA’s Science to Achieve Results Program, a ten-year Environmental Protection Agency (EPA) study released March 10, 2008, summarizes important research findings found from $127 million invested in research grants on children’s environmental health in response to an executive order issued in 1997. Executive Order 13045, Protection of Children From Environmental Health Risks and Safety Risks, requires federal agencies to place a high priority on assessing risks to children. EPA, through its Science to Achieve Results (STAR) program, issued more than 60 research grants in response to this order, which in turn, produced more than 1000 scientific journal articles. “Understanding potential environmental health risks to children is important to EPA,” said George Gray, assistant administrator of EPA’s Office of Research and Development. “This research will help us assess and address environmental factors that may affect some of the most vulnerable members of our society.” The report summarizes research from the STAR children’s health program over the past 10 years, highlighting scientific findings in epidemiology, exposure science, genetics, community-based participatory research, interventions, statistics and methods. Some of the major findings of this research include: People metabolize pesticides differently based […]

(Beyond Pesticides, February 20, 2008) Pesticides that run off agricultural land and mix in rivers and streams combine to have a greater than expected toxic effect on the salmon nervous system, according to researcher Nathaniel Scholz, PhD, a zoologist with the National Oceanic and Atmospheric Administration (NOAA) in Seattle. Dr. Scholz, who presented his findings at the symposium entitled From Kitchen Sinks to Ocean Basins: Emerging Chemical Contaminants and Human Health,  which was organized by NOAA and hosted at the American Association for the Advancement of Science (AAAS) Annual Meeting, had previously looked at the effects of individual pesticides. However, to get a more realistic idea of exposure, combinations of several pesticides were used and juvenile salmon exposed to them two at a time. The results surprised Dr. Scholz and his team. The total impact observed from combined pesticides was greater than the sum of the individual pesticides, demonstrating a synergistic effect. Some pesticides that were not deadly when tested in individual trials killed all salmon exposed to combinations. A mixture of the pesticides diazinon and malathion, exhibited the greatest synergistic effect and killed all the salmon exposed to them, even at the lowest concentrations. “It was eye opening,” Dr. […]

(Beyond Pesticides, January 31, 2008) A study to be published in the February 2008 issue of Environmental Health Perspectives finds that children who eat a conventional diet of food produced with chemical-intensive practices carry residues of organophosate pesticides that are reduced or eliminated when they switch to an organic diet. The study is entitled “Dietary Intake and Its Contribution to Longitudinal Organophosphorus Pesticide Exposure in Urban/Suburban Children” (Chensheng Lu, Dana B. Barr, Melanie A. Pearson, and Lance A. Waller) and includes authors from Rollins School of Public Health, Emory University, and the National Center for Environmental Health, Centers for Disease Control and Prevention.According to the authors, “The objective of this article is to present the data of assessing young urban/suburban children’s longitudinal exposure to OP [organophosphate] pesticides in a group [of] young children participating in the Children Pesticide Exposure Study (CPES). The results from this study identify not only the predominant source of OP pesticide exposure but also the profile of exposures in children that are vital in formulating the strategies, both from the regulatory policy and personal behavior change perspectives, in reducing children’s exposures to OP pesticides.” The study design included 23 children, male and female, from the Seattle […]

(Beyond Pesticides, January 14, 2008) Researchers at the Indian Institute of Technology (IIT) Madras have developed nanoparticles that can remove organochlorine pesticides from drinking water. These chemicals are quite persistent in the environment and difficult to remove from water. Notorious organochlorines include DDT, endosulfan, HCH (hexacholorcyclohexane) and aldrin, all of which have known health and/or environmental hazards. Many of these chemical pesticides are used heavily in agriculture and taint India’s water. Though no comprehensive national survey has been done, isolated studies show contamination of groundwater and river systems that cannot be removed by standard water filters. “Even though some of these pesticides have been banned, they are very much present in the environment. For instance, endosulfan has an environmental lifetime of 100 years,” said Thalappil Pradeep, professor of chemistry at IIT Madras. He leads the research that has shown that nanoparticles, mostly from gold, silver, copper and several oxides, are effective at removing endosulfan even at very low concentration. “Efficient chemistry at low concentration is important so that even if one molecule of the pesticide passes by, it gets removed by the nanoparticle,” said Pradeep. He holds a US and an Indian patent and has licensed part of the technology […]

(Beyond Pesticides, November 27, 2007) While there is a trend towards less pesticide use in Christmas tree production, most trees are still treated with one pesticide or another — many of which are prohibited for residential use. In it’s 2007 survey results, North Carolina State University’s Mountain Horticultural Research and Extension Center, reports that glyphosate was the pesticide applied most commonly. The Center found that almost 90 percent of the state’s tree growers had applied glyphosate last season. The following tables summarize the state’s results, listing the pesticides that are used on at least 5% of the Christmas tree acreage. Nearly 40 different active ingredients are registered for tree production nationwide. Oregon, North Carolina, Michigan, Pennsylvania, Wisconsin, Washington, New York, and Virginia are the nation’s top Christmas tree producing states. Pennsylvania’s Department of Agriculture, which published a list of insecticides for Christmas tree production in February 2007, recommends carbaryl, carbofuran, chlorpyrifos, diazinon, endosulfan, imidacloprid, malathion, permethrin and many more. Many of these pesticides have been “banned” or have always been prohibited in residential settings, however EPA’s registration process and phase-out deals with manufacturers allows continued use on Christmas trees and other agricultural products. For information on the toxicity of these […]

(Beyond Pesticides, August 1, 2007) Farm workers and advocate groups, including Beyond Pesticides, filed a lawsuit yesterday against the Environmental Protection Agency (EPA) to stop the continued use of a deadly pesticide called chlorpyrifos. Chlorpyrifos is a highly neurotoxic insecticide developed from World War II-era nerve gas. Exposure can cause dizziness, vomiting, convulsions, numbness in the limbs, loss of intellectual functioning and death. “This pesticide puts thousands of workers at risk of serious illness every year,” said Erik Nicholson of the United Farm Workers. “It is inexcusable for the EPA to allow the use a pesticide they know to be damaging to people, especially children.” Luis Medellin, a Lindsay, California resident, suffered first hand exposure to chlorpyrifos. “I got sick, and my mother and younger sisters started throwing up, all this in our own home. It was a terrible feeling, the smell coming in through our air conditioner,” he said. “The government must not allow this dangerous chemical to be sprayed around our schools and communities.” Chlorpyrifos is used widely on corn, orchard, and vegetable row crops all over the country. Also know as Lorsban, it is responsible for a substantial number of worker poisonings each year and has been […]

(Beyond Pesticides, July 23, 2007) New research finds several species of freshwater fish have lower temperature tolerances when exposed to the widely used pesticides endosulfan and chlorpyrifos. The discovery reveals another key pesticides issue in the global warming debate. The study, “The Effects of Three Organic Chemicals on the Upper Thermal Tolerances of Four Freshwater Fishes” (Environmental Toxicology and Chemistry, July 2007), is the work of Ronald Patra of Australia’s Department of Environment and Conservation and colleagues. The study establishes the upper temperature tolerances of both unexposed and exposed silver perch, eastern rainbowfish, western carp gudgeon and rainbow trout. Exposed fish were given sublethal doses of endosulfan, chlorpyrifos or phenol. The results show exposure to endosulfan cause a decrease of temperature tolerance in silver perch by 2.8 °C, eastern rainbowfish 4.1 °C, western carp gudgeon 3.1 °C, and rainbow trout 4.8 °C. Chlorpyrifos decreases temperature tolerance in silver perch by 3.8 °C, eastern rainbowfish 2.5 °C, western carp gudgeon 4.3 °C, and rainbow trout 5.9 °C. Phenol is not shown to cause a significant decrease in tolerance. The authors conclude, “The reduction in thermal tolerance of fish in the presence of endosulfan and chlorpyrifos suggest that, not only does temperature […]

(Beyond Pesticides, July 5, 2007) A new study showing that the order of exposure to multiple pesticides may be just as important as the dose, timing and length of exposure adds another dimension to the complex task of risk assessments. Using carbaryl and chlorpyrifos, University of York scientists have observed significant differences in mortality rates of freshwater invertebrates depending on the order of exposure to these frequently used agricultural chemicals. The study, Modeling Combined Effects of Pulsed Exposure to Carbaryl and Chlorpyrifos on Gammarus Pulex, suggests the sequence of pesticide exposure may be just as important of a variable as the dose, the timing of the dose and the length of exposure when factoring environmental and health endpoints. The researchers conducted the study by exposing the freshwater invertebrate Gammarus pulex — a tiny shrimp — to pulses of the two insecticides (both of which affect the nervous system through acetylcholinesterase inhibition) mimicking exposure to chemical mixtures in the environment — for example, farmers may apply several different pesticides over the growing season that run off into the aquatic environment. After receiving a pulse of one pesticide, the shrimp were given 14 days, a time period chosen based on previous experiments, […]

(Beyond Pesticides, May 17, 2007) Initial results of a pilot program conducted in a Central Valley farming community in California finds that residents have significant levels of the organophosphate chlorpyrifos in their bodies during the spraying season. The levels topped what the U.S. Environmental Protection Agency (EPA) considers acceptable for pregnant and nursing women. Over 91% of the people tested had above average levels of breakdown products of the insecticide chlorpyrifos in their urine, and all but one had chlorpyrifos concentrations above EPA’s recommended threshold of 1.5 parts per billion. The study is an outcome of the collaboration between Pesticide Action Network, Californians for Pesticide Reform, the nonprofit environmental research firm Commonweal, and the community group El Quinto Sol de America. The groups tested the urine of 12 adults in various locations throughout the town of Lindsay during peak spraying season last summer. The results are paired with air monitoring data, also done by the group, that show for three years running chlorpyrifos has not only been detected in the air in town and near schools, but also exceeded EPA’s acceptable level for short-term exposure. The results for the first time shed light on a problem residents suspected but could […]

(Beyond Pesticides, April 27, 2007) Health risk, environmental risk and investment risk all have one thing in common — they are all part of Amvac Chemical Corporation’s business practices. According to a Los Angeles Times investigation earlier this month, this socially irresponsible business model has led Amvac to double-digit revenue growth and a toxic legacy. The Amvac homepage reads, “The Company’s chief strategy is to acquire niche product lines from multi-billion dollar companies that divest mature products to focus on newly discovered molecules. The Company’s products include insecticides, fungicides, herbicides, soil fumigants, defoliants, molluscides and growth regulators.” In actuality, Amvac buys the rights to older, high risk pesticides from larger companies. Many of these pesticides, which are some of the most toxic on the market, are likely to be banned or restricted due to safety concerns. Amvac hires scientists and lawyers to keep these dangerous chemicals on the market as long as possible. The company also often skirts regulatory issues by exporting products to countries with weaker regulatory systems. “There’s something here rather unique, which is a company that basically goes intentionally after chemicals that are in trouble because of health and safety concerns,” said Steve Schatzow, a former director […]

(Beyond Pesticides, February 6, 2007) Conservation groups have challenged a government plan that would allow six more years use of a deadly pesticide it admits needs to be banned. The groups, represented by Earthjustice, have reopened a lawsuit in federal district court aiming at speeding up the removal of azinphos-methyl, commonly called AZM or guthion. The legal actions also takes aim at getting rid of two other deadly pesticides, phosmet and chlorpyrifos. All three pesticides were developed from World War I-era nerve toxins. AZM is used primarily to kill insects on orchard crops such as apples, cherries, pears, peaches, and nectarines. The highest uses occur in Washington, Oregon, California, Michigan, Georgia, New York, New Jersey, and Pennsylvania. Chlorpyrifos is used widely on corn and orchard crops. Use of phosmet on orchard crops and blueberries poses particularly serious risks to workers. In November 2006, EPA decided that AZM poses unreasonable adverse effects and must be banned but allowed its continued use on fruit crops for six more years — until 2012 — and on nut crops for three more years — until 2009. “With safer alternatives already in widespread use, EPA has betrayed the trust of the men, women, and children […]