(Beyond Pesticides, December 5, 2007) The state of Maryland, in an effort to stem the extensive pollution of the Chesapeake Bay, has developed a cost-share program that pays farmers to plant winter cover crops, beginning with a pilot program in 1992. Farmers plant a variety of crops, wheat being the most popular, which in turn absorb excess nutrients in the soil and reduce the amount that is washed into the bay. In spring, famers will harvest the cover crops (sometimes with an herbicide) and plant for the regular growing season. According to a 2005 report by the Maryland Department of Agriculture (MDA), “Excess nutrients and sediments entering the Chesapeake Bay from urban, agricultural, and forested nonpoint sources [NPS] within the Bay region have been shown to cause degradation of both water quality and living resources.” The report continued by acknowledging, “Excess loading of nutrients in the Chesapeake Bay region has been attributed to runoff and potential nitrate leaching from agricultural practices . . . agriculture has been its most frequent cause.” Cropland in Maryland accounts for 1.7 million acres of 6.3 million total acres in the state. The MDA report states, “As in other agricultural areas nationwide, crop yields are […]

(Beyond Pesticides, November 28, 2007) Researchers at the Centers for Disease Control (CDC) have determined that previous studies that assessed population-based exposure to atrazine were significantly and systematically underestimated. The CDC relies on the detection and analysis of only one of the twelve identified metabolites of atrazine measured in human urine samples to estimate exposure. However, after looking at multiple metabolites, researchers found that previous assessments missed most of the exposure. Atrazine mercapturate (AM), a metabolite of atrazine, was used as definitive evidence of direct atrazine exposure. General population data indicated that less than 5% of the population was exposed to atrazine-related chemicals. However, researchers at the CDC found that this research, which relied on AM detection, gives a low and misleading estimate of exposure to atrazine and atrazine- related metabolites. Published in Environmental Health and Perspectives and entitled “Assessing Exposure to Atrazine and Its Metabolites Using Biomonitoring”, the small-scale study involving 24 individuals measured nine atrazine-related metabolites in urine. The sample was organized with respect to how likely the individuals were to be exposed to atrazine: (1) high exposure (turf pesticide applicators), (2) low exposure (non-occupationally exposed people in whom atrazine mercapturate was found during a prior study) and […]

(Beyond Pesticides, November 7, 2007) A lawsuit was filed in federal court on Monday by fishing and environmental groups seeking to force the federal government to uphold five-year-old rules aimed to keep toxic agricultural pesticides from endangering salmon and steelhead. The lawsuit, filed in the U.S. District Court in Seattle, petitions the court to order the National Marine Fisheries Service (NMFS) to identify measures needed to protect salmon from the pesticides and to complete required consultations with the Environmental Protection Agency (EPA). The NMFS has failed to carry out these measures first ordered in 2002 by federal court. It was ordered to consult with the EPA to develop permanent methods for protecting salmon and steelhead from 54 toxic pesticides found in west coast salmon streams. Under the federal Endangered Species Act, the NMFS is required to complete such actions within 90 days. “Apparently what it takes to get this administration to do its job under [the Endangered Species Act] is to have someone there enforcing the law every step of the way,” said Joshua Osborne-Klein, an attorney for Earthjustice, the environmental public interest law firm representing the advocates. Pesticides have been detected in every major salmon stream in the Pacific […]

(Beyond Pesticides, November 5, 2007) Forty-four organizations signed on to a letter to the National Organic Standards Board (NOSB) on October 26, asking the board to protect organic aquaculture standards by prohibiting the USDA’s organic label from being placed on fish raised in open net pens or fed wild fish. Six months ago, the NOSB voted overwhelmingly to temporarily ban the labeling of any fish raised under these circumstances as organic until comments from industry and the organic community on the issue could be heard. During this time, the Aquaculture Working Group issued an Interim Report, which proposes conditions under which wild fishmeal and oil could be used as feed ingredients and open net pen fish farming would be allowed in organic aquaculture. In response to the report’s suggestions, the co-signing organizations conclude that while the farming of herbivorous finfish may be conducted within organic regulations, farming carnivorous finfish (including salmon) in open net cage systems is an inherently flawed farming practice, incompatible with organic principles. “Raising fish in this manner directly contradicts USDA Organic regulations; putting a USDA Organic label on these fish is like trying to force a round peg into a square hole,” said Center for Food […]

(Beyond Pesticides, October 16, 2007) Corn, genetically engineered (GE) to tolerate the pesticide Bacillus thuringiensis (Bt), has been found to harm non-target aquatic insects and disrupt the connected food web. A new study by researchers at Indiana University, funded by the National Science Foundation and published in Proceedings of the National Academies of Sciences, suggests that the crop, which has been licensed for use since 1996, poses an unforseen risk to aquatic ecosystems. According to the study, roughly 35 percent of American corn acreage is Bt corn. Pollen and other parts of the plants are travelling much farther than the fields in which they are planted, carrying Bt toxins through watersheds and being consumed by close relatives of the corn’s targeted pests. Caddisflies experience high mortality and stunted growth as a result of exposure. As researcher Todd V. Royer observed, they “are a food resource for higher organisms like amphibians and fish. And, if our goal is to have healthy, functioning ecosystems, we need to protect all the parts. Water resources are something we depend on greatly.” This effect went unnoticed for ten years because the Environmental Protection Agency (EPA), in its registration trials, tested Bt on a crustacean, rather […]

(Beyond Pesticides, October 1, 2007) For the second time in ten years, state officials have poured aquatic insecticide and piscicide rotenone into California’s Lake Davis in an effort to control an invasive species of fish, northern pike. Despite the first failure of rotenone to eradicate the pike in 1997, Fish and Game officials felt they had no alternative but to resort to the toxic chemical once more. The invasive pike were first introduced, illegally, into Lake Davis in 1994. Since then, the population has reached uncontrollable proportions, out-competing local trout. The small town of Portola, which uses Lake Davis as its drinking water supply, is largely supported by fishing and tourism, which are boosted by its reputation for producing extremely large trout. Local businesses fear the consequences of the pikes’ destruction of the attraction. Despite its economic concerns, the town did not universally support the first application of rotenone in 1997. Four residents, including the mayor pro tem, were arrested in a mass protest of the application as Fish and Game put thousands of gallons of the chemical in the lake. Within a year, pike reappeared. Ten years and many failed attempted alternatives later, the pike population thrives. Fish and […]

(Beyond Pesticides, September 20, 20087) A citizens group sued the county and the state of California September 14, 2007 for not allowing adequate public input before using toxic sprays on the Eel River to eradicate invasive weeds. Eureka-based Californians for Alternatives to Toxics (CATs) sued the Humboldt County Agricultural Commissioner (County) and the California Department of Parks and Recreation (DPR) for their decision to use herbicides to kill purple loosestrife plants for as many as 10 years without first consulting with the public. The suit, filed in Humboldt County Superior Court, also faults the agencies for failing to consider safer and more effective methods such as biological weed control programs, already used successfully throughout the country.“The decision to spray was made behind closed doors with the many people who care deeply about the Eel River locked out,” said Patty Clary, speaking for CATs. “State law requires that the public be involved in important environmental decisions and that alternatives be seriously considered – these requirements were not met.” The agencies’ decision to spray the herbicide imazapyr from boats on 200 riverbank sites along 25 miles of the Eel was first sprung on the public on July 10 at an invitation-only meeting […]

(Beyond Pesticides, September 14, 2007) Data collected by the Environmental Protection Agency (EPA) between 2003 and 2006 has found atrazine to exist in Midwest drinking water supplies at high levels. The federal monitoring data, obtained by the National Resources Defense Council (NRDC), shows increased atrazine levels in 94 of 136 water systems tested in Indiana, Ohio, Iowa, Kentucky, Minnesota, and Nebraska. Atrazine, which has been linked to cancer in numerous studies, is a common agricultural herbicide that could see increased use as demand for corn rises due to ethanol production. In 2003, EPA called it “the most heavily used herbicide in the United States.” According to NRDC’s report, EPA’s study found that nearly all 40 monitored watersheds showed levels of atrazine at levels that harm aquatic animals and habitat. Atrazine’s effect on amphibians has been well documented, and similarly serious health effects have been found in larger mammals. Chronically contaminated drinking water puts humans at the risk of exposure to similar long-term health effects. In agricultural areas of the midwest, the risk is especially high. “Kentucky’s waterways are particularly vulnerable to contamination,” said a Western Kentucky University report. “Networks of sinkholes and underground streams allow water and contaminants to flow […]

(Beyond Pesticides, August 17, 2007) The widespread presence of pesticides and other agricultural runoff has been confirmed in the world’s largest coral reef system. Degradation of the system threatens not only a natural treasure but also the region’s economy. Australia’s Great Barrier Reef is the subject of a recent report by the Great Barrier Reef Marine Park Authority. Entitled the “Annual Marine Monitoring Report 2006,” the study confirms extensive contamination in eight of the ten major tributaries into the marine park, much of which is fertilizer and pesticide runoff from the area’s farmland. Local environmental groups are calling for government protection of the reef from these pollutants, and tourism interests worry that damage to the reef will reduce the number of visitors to Australia. According to World Wildlife Foundation-Australia program leader Nick Heath, “Reducing pollution load is possible and will help us save the Reef, as well as the 60,000 tourism jobs based around the Reef.” According to the report, “Water quality in the Great Barrier Reef is principally affected by land-based activities in its adjacent catchments, including vegetation modification, grazing, agriculture, urban development, industrial development and aquaculture. Nutrients, sediments and pesticides are the pollutants of most concern for the […]

(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, July 3, 2007) A scientist at the Minnesota Pollution Control Agency (MPCA) has filed a whistleblower lawsuit in federal court, arguing that he was first not allowed to share his research with a legislative panel, and then fired for it. Hydrologist Paul Wotzka, who worked for the state Agriculture Department for sixteen years before leaving to join MPCA in October, had been slated to testify about the rise in atrazine levels in Whitewater State Park, which have exceeded recommended levels for several area species. Atrazine, which has been linked to cancer, birth defects, neurotoxicity, endocrine disruption and a variety of other health and environmental effects and has been banned by the European Union, is a widely used agricultural herbicide.. Mr. Wotzka said in his lawsuit, as well as publicly, that this rise in atrazine in Minnesota waterways was due to increased row-crop agriculture in the region and the the Agriculture Department’s support of corn for ethanol. In his lawsuit, Mr. Wotzka is asking for $75,000 and to return to his position with MPCA. He claims that he was put on investigative leave, “related to missing data that is property of the State of Minnesota.” The investigative leave led […]

(Beyond Pesticides, April 3, 2007) Responding to concerns about the state’s polluted waterways, Florida will become the first in the nation to enact a statewide restriction on the content of fertilizers. If passed, fertilizers sold in Florida must be no- or low-phosphate. Phosphorus, along with nitrogen, is a pollutant that contributes to algae blooms, fish kills, and dead zones, all of which alter already fragile ecosystems. The high phosphate levels are due in large part to Americans’ affinity for heavily-fertilized, brilliantly green lawns, golf courses, and recreational areas. The proposed rule was designed in response to a number of local fertilizer restrictions in the state; rather than deal with the confusion of regulating a wide variety of local standards, the Department of Agriculture’s rule will clarify and standardize the movement to reduce pollution from lawn fertilizers. According to Richard Budell, director of water resources protection for the Department of Agriculture and Consumer Services, “One of the things we’re trying to prevent is a patchwork of local ordinances that would be almost impossible to enforce.” Local regulations include a similar rule that has been in place in Wellington since 2000, one in Crystal River than allows only slow-release fertilizers, and a […]

(Beyond Pesticides, March 9, 2007) New research shows that frogs are more sensitive to hormone-disturbing environmental pollutants than was previously thought. Male tadpoles that swim in water with environmentally relevant levels of such substances become females, according to the study that will be published in the scientific journal Environmental Toxicology and Chemistry (ET&C) in May (See University Press Release). The results may shed light on at least one reason that up to a third of frog species around the world are threatened with extinction, suggests the study. In a laboratory experiment by researchers in Sweden, two species of frogs, the European common frog (Rana temporaria) and the African clawed frog (Xenopus tropicalis), were exposed to levels of oestrogen (estrogen or chemicals mimicking the effect of estrogen) similar to those detected in natural bodies of water in Europe, the United States and Canada.The results were startling: whereas the percentage of females in two control groups was under 50 percent – not unusual among frogs – the sex ratio in the groups of tadpoles who matured in water dosed with different levels of oestrogen were significantly skewed. Even tadpoles exposed to the weakest concentration of the hormone were, in one of the […]

(Beyond Pesticides, March 6, 2007) In a victory for Alaska’s environmental community, the state’s Department of Environmental Conservation (DEC) has denied the Alaska Railroad Corporation’s (ARRC) application to spray herbicides, citing water quality concerns. The decision effectively maintains a record of over 20 years of non-chemical vegetation management of Alaska’s railways. ARRC submitted the application to spray herbicides last year to DEC. According to DEC’s documents, the proposed treatment area included approximately 500 miles of track and 100 miles of rail yard. The spray mixture proposed would have been comprised of three pesticide products: Razor Pro (active ingredient glyphosate*), Solution Water Soluble (dimethylamine salt of 2,4-D*), and Oust Extra (sulfometuron methyl and metsulfuron methyl). The mixture would have also contained the drift retardant Alenza (proprietary polyvinyl polymer). ARRC claims on its website it has “tried to control vegetation along its track with non-chemical methods including mechanical brush-cutting, manual labor, steam and burning since 1983. Despite these efforts, the volume and location of vegetation along the track has resulted in stiff fines from the Federal Railroad Administration, the railroad’s federal regulatory agency.” Over one thousand written comments were filed with DEC, and oral testimony was given during the public participation process […]

(Beyond Pesticides, March 2, 2007) The United States Department of Agriculture’s (USDA) Pesticide Data Program (PDP) recently released its latest annual summary detailing pesticide residues in the U.S. food supply. The data, from 2005, reveals approximately two-thirds of sampled foods contained one or more pesticides at detectable levels. For the 2005 report, PDP sampled fresh and processed fruit and vegetables, soybeans, wheat, milk, heavy cream, pork, bottled water and drinking water. A total of 14,749 samples were tested for various insecticides, herbicides, fungicides and growth regulators. Twelve states reported data to comprise the report: California, Colorado, Florida, Maryland, Michigan, Minnesota, Montana, New York, Ohio, Texas, Washington and Wisconsin. Excluding drinking water, 84 percent of samples originated within the United States. Foods most likely to be consumed by infants and children are analyzed to provide data that is used in the implementation of the Food Quality Protection Act. The data is used in this context to assess dietary exposure to pesticide residues by the Environmental Protection Agency (EPA). Overall results show that, excluding drinking water samples, 36 percent of samples had more than one detectable pesticide, 30 percent had one detectable pesticide, and 34 percent did not have detectable levels of […]

(Beyond Pesticides, February 27, 2007) Pesticide run-off is polluting larger areas of the Great Barrier Reef than originally thought, leading scientists to call for better land care practices. For the first time a new series of satellite images show that sediment plumes, containing pesticides and other pollutants from Australian river systems, travel to the outer Great Barrier Reef, and beyond. Originally, it was thought that the plumes only affected the inner Great Barrier Reef Lagoon and the inner reef corals. The images, taken during the heavy rains in far north Queensland by the National Aeronautics and Space Administration’s MODIS satellite, show the pollutant plumes are travelling up to 135km offshore. Recent studies have shown agricultural chemicals are so poisonous to coral that it can prevent spawning, even when only present in minuscule amounts. This was found to consequently hinder the reef’s ability to regenerate and protect itself. Arnold Dekker, Ph.D., a scientist with the Australia’s Commonwealth Scientific and Industrial Research Organisation (CSIRO), said the images would change the way scientists analysed reef pollution and that they showed land care practices needed to be improved in order to save the reef from destruction. “This is the first time it’s been really […]

(Beyond Pesticides, February 20, 2007) With little oversight from the federal government, a myriad of chemicals are being injected underground in the name of energy exploration in the West. Among these chemicals, biocides are considered to pose a serious threat to environmental and public health. Hydraulic fracturing, known as “fracking” or “frac’ing” for short, is the process approximately 90 percent of oil and gas wells in the U.S. undergo to facilitate extraction. Biocides are used to kill microorganisms that can interfere with other fluids and methods used to stimulate extraction, and to prevent corrosion to pipes. Thousands of wells are popping up over Wyoming, Montana, Colorado, and New Mexico, many of which are located on private property, and some directly adjacent to homes. Many property owners do not own adequate mineral rights to what lies under their land and are rendered powerless to stop energy exploration. With minimal federal oversight, wells, roads and pipelines are established rapidly in these areas bringing heavy traffic, noisy equipment, and air, soil and water pollution. In 2005, the oil and gas industry was granted an exemption from the Safe Drinking Water Act, allowing the injection of toxic fluids directly into groundwater without oversight by […]

(Beyond Pesticides, February 1, 2007) Thirty-five years after the banning of DDT, extremely high concentrations of the pesticide are being found in fish caught in California’s Los Angeles county waters. According to a newly released federal survey by the National Oceanic and Atmospheric Administration (NOAA) and Environmental Protection Agency (EPA), the fish caught in the area contain the world’s highest-known DDT concentrations. The survey was conducted in order to update health advisories on which fish are unsafe to eat and to help EPA decide whether to attempt a costly operation to reduce continued contamination from a deposit of DDT on the ocean floor. The findings contradict the belief held by some scientists that DDT on the ocean floor has been breaking down into less-toxic compounds and would soon disappear from marine life. The contamination, most severe in the middle of San Redondo Bay, stems from a 100-ton deposit of DDT released by the Montrose Chemical Co. beginning in the late 1940s, which still covers several square miles of the ocean floor. The pesticide manufacturer had a plant near Torrance, California, from 1947 to 1971, releasing about 2,000 tons of DDT into county sewers that subsequently emptied into the ocean. The […]

(Beyond Pesticides, January 25, 2007) The commonly used herbicide atrazine has been found to have negative biological effects on phytoplankton-free-floating algae that forms the base of the food chain for aquatic animals. The study, published in the January 2007 issue of the journal Pesticide-Biochemistry and Physiology, indicates that protein levels in phytoplankton significantly decrease as a result of atrazine exposure, possibly having a negative affect on the nutritional levels of all aquatic species. The National Oceanic and Atmospheric Administration (NOAA) National Centers for Coastal Ocean Science researchers exposed five algal species to atrazine levels within the range of concentrations measured in the estuarine environment. In the majority of the species tested, the amount of energy converted into protein from photosynthesis, the process by which green plants convert water and carbon dioxide into organic materials using solar energy, significantly decreased with increased exposure. Atrazine is one of the most heavily used herbicides in the United States, applied to a wide variety of crops including corn, sorghum, sugarcane, pineapple, and Christmas trees, as well as turf. It acts as an inhibitor of photosynthesis by preventing the transfer of energy in certain plant species. NOAA researchers observed significant decreases in the size of […]

(Beyond Pesticides, January 18, 2007) A new study conducted in Costa Rica’s mountain forests indicates that surprisingly high concentrations of pesticides are accumulating far above the low altitudes at which they are used. Previously thought to be safe from pesticides applied to distant agricultural areas, some remote mountain forests of Costa Rica were found to have pesticide levels almost ten times greater than those in low-lying areas closer to farms and plantations. The study, led by University of Toronto, Scarborough professor Frank Wania, Ph.D., measured air and soil pesticide levels at 23 sites across Costa Rica in order to produce a model to predict potential accumulation of chemicals at high altitudes. The insecticide endosulfan and the fungicide chlorothalonil were found in the largest concentrations, with up to 1 part per billion (ppb) of chlorothalonil and 3 ppb endosulfan in soil. The high concentrations can be explained by a process in which polluted air above the farms and plantations is pushed up into the mountains, where it then cools and becomes polluted rainwater or fog. The hydrophilic nature of modern pesticides makes the occurrence of this phenomenon much more likely; as Crispin Halsall, Ph.D., of Lancaster University (U.K.) explains, “Most currently […]