Archive for the 'Events' Category
08
Aug
(Beyond Pesticides, August 8, 2008) University of California Davis Cancer Center physicians recently released results of research showing that Vietnam War veterans exposed to Agent Orange have greatly increased risks of prostate cancer and even greater risks of getting the most aggressive form of the disease as compared to those who were not exposed. The findings, which appear online now and will be published in the September 15 issue of the journal Cancer, are the first to reliably link the herbicide with this form of cancer by studying a large population of men in their 60s and the prostate-specific antigen (PSA) test to screen for the disease. “While others have linked Agent Orange to cancers such as soft-tissue sarcomas, Hodgkin’s disease and non-Hodgkin’s lymphoma, there is limited evidence so far associating it with prostate cancer,” said Karim Chamie, lead author of the study and resident physician with the UC Davis Department of Urology and the VA Northern California Health Care System. “Here we report on the largest study to date of Vietnam War veterans exposed to Agent Orange and the incidence of prostate cancer.” Chamie also said that, unlike previous studies that were either too small or conducted on men […]
Posted in 2,4-D, Prostate Cancer | No Comments »
04
Aug
(Beyond Pesticides, August 4, 2008) According to a new Center for Public Integrity investigation, Perils of the New Pesticides, pyrethrins and pyrethroids were responsible for more than 26 percent of all major and moderate human incidents involving pesticides in the United States in 2007, up from just 15 percent in 1998 ”” a 67 percent increase. This is based on an analysis of adverse reaction reports filed with the Environmental Protection Agency by pesticide manufacturers. As a result of the Center’s investigation, the director of the EPA’s Office of Pesticide Programs said the agency would begin a broad study of the human health effects of these chemicals this year. “The alarming rise of pesticide-related incidents attributed to pyrethrin and pyrethroid affiliated products is a serious concern for the millions of households that use them,” said Center Executive Director Bill Buzenberg. “The Center for Public Integrity uncovered this public safety issue through more than a dozen Freedom of Information Act requests and crunching the data. This should be basic public information if the EPA were doing its job.” Data from the American Association of Poison Control Centers reveals a similar trend that supports the EPA data analyzed by the Center. The […]
Posted in Disease/Health Effects, Pyrethrin | No Comments »
01
Aug
(Beyond Pesticides, August 1, 2008) The Oregon Department of Agriculture has released the 2007 Pesticide Use Reporting System (PURS) annual report, summarizing data collected last year -making it the first report to include information from a mandatory electronic reporting of pesticide use statewide. The requirement to report online applies to anyone using a registered pesticide or pest control product in the course of business, for a government entity, or in a public place. The 2007 annual report also includes data from a household pesticide use survey. The release comes nine years after being authorized by the state legislature, due to debate over funding and scope of the report. The required reporting is also set to expire in 2009, requiring activists to lobby for continuation of the program. For 2007, there were 5,732 reporters who filed 284,984 reports of pesticide use into PURS. The reports identified 551 active ingredients used statewide last year. The most used active ingredient, by pounds, was the soil fumigant metam-sodium (42 percent of total pounds reported), which is often used before planting potatoes to kill most soil life. The next two most commonly used active ingredients were the herbicide glyphosate (9 percent), and copper naphthenate (7 […]
Posted in Bifenthrin, Oregon, Pesticide Regulation | No Comments »
31
Jul
(Beyond Pesticides, July 31, 2008) The Third International Biofumigation Symposium took place in Australia July 21-25, 2008, highlighting new scientific advancements in the age old practice of planting crops in the brassica family (radish, mustard, etc.) prior to growing other crops to control diseases, insects, and weeds. Research in this area reveals that in many cases, “biofumigation,” as it is called, provides disease and pest control comparable to that of pesticides commonly used as soil fumigants, and does not have the negative health and environmental effects associated with these fumigants. Growing interest in biofumigation is spurred by the international phase-out of the toxic soil fumigant methyl bromide (for its role in ozone depletion) under the Montreal Protocol. Unfortunately, even though the environmental and health risks of methyl bromide and other soil fumigants have been documented, and non-toxic alternatives such as biofumigation exist, the U.S. Environmental Protection Agency (EPA) has essentially ignored the Montreal Protocol and continued to allow the use of methyl bromide under “exemptions.” In the most recent EPA action on the subject, the agency released proposed rules and risk mitigation measures for five toxic soil fumigants on July 10, 2008. These rules fall short of the hopes of […]
Posted in Alternatives/Organics, International, methyl bromide | 2 Comments »
29
Jul
(Beyond Pesticides, July 29, 2008) On July 28, 2008, a coalition of farmworker, public health, and environmental groups -including Beyond Pesticides- filed a lawsuit challenging the Environmental Protection Agency’s (EPA) decision to allow continued use of the toxic pesticide diazinon. “The lack of action on diazinon is yet another example of EPA’s failure to fully consider the risks to farmworkers, children, and the environment from pesticides,” said Jay Feldman, executive director of Beyond Pesticides. The lawsuit is part of the coalition’s multi-year campaign to protect children, farmworkers, and wildlife from the most dangerous pesticides and to reform EPA’s lackadaisical regulation of public and environmental health. The coalition has filed a series of lawsuits targeted at the worst poisons on the market: diazinon is near the top of that list. “EPA’s system for protecting the public from the dangers of pesticides like diazinon is broken,” said Joshua Osborne-Klein, an attorney for Earthjustice, the public interest law firm that represents the coalition. “The agency should be protecting farmworkers and children, not the profits of pesticide manufacturers.” Diazinon is an organophosphate pesticide that originates from nerve gases the Nazis developed during World War II. Farmworkers who are exposed to diazinon can suffer muscle […]
Posted in Chemicals, Diazinon, Litigation, Pesticide Regulation | No Comments »
28
Jul
(Beyond Pesticides, July 28, 2008) The U.S. Environmental Protection Agency (EPA) has announced a proposed decision that residues of carbofuran, a toxic pesticide that is used on a variety of crops, will no longer be allowed on food. This effectively means that carbofuran will have to be removed from the U.S. market, benefiting consumers and farmworkers, as well as birds, which are frequently poisoned by the deadly chemical. EPA has concluded that dietary, worker, and ecological risks are of concern for all uses of carbofuran. According to EPA’s website, all products containing carbofuran generally cause unreasonable adverse effects on humans and the environment and do not meet safety standards, and therefore are ineligible for reregistration. The agency says the notice, which is available now online, will be published in the Federal Register for a 60-day public comment period on July 30, 2008. “This is a huge victory for the environment. EPA is to be congratulated for taking such decisive action to eliminate the dangers posed by carbofuran,” said Dr. Michael Fry, American Bird Conservancy’s Director of Conservation Advocacy. “This decision is based on overwhelming scientific evidence and sends a clear signal to manufacturers that it doesn’t pay to fight the […]
Posted in Announcements, Carbofuran, Chemicals, Pesticide Regulation, Wildlife/Endangered Sp. | 1 Comment »
25
Jul
(Beyond Pesticides, July 25, 2008) San Francisco, California —  On July 24, 2008,  a broad coalition of farmworker, public health, and environmental groups filed a lawsuit against the Environmental Protection Agency (EPA) to stop the continued use of a hazardous pesticide called endosulfan. The coalition is demanding action from EPA to protect children, farmworkers, and endangered species. Endosulfan is an organochlorine, part of the same family of chemicals as DDT, which EPA banned in 1972. Like other organochlorine pesticides, endosulfan is persistent in the environment and poisons humans and wildlife both in agricultural areas and in regions far from where it was applied. “This dangerous and antiquated pesticide should have been off the market years ago,” said Karl Tupper, a staff scientist with Pesticide Action Network. “The fact that EPA is still allowing the use of a chemical this harmful shows just how broken our regulatory system is.” Acute poisoning from endosulfan can cause headaches, nausea, vomiting, convulsions, and in extreme cases, unconsciousness and even death. Studies have linked endosulfan to smaller testicles, lower sperm production, and an increase in the risk of miscarriages. One glaring omission in the EPA’s decision is its failure to consider risks to children. A […]
Posted in Announcements, Disease/Health Effects, Endosulfan, Litigation, Pesticide Regulation | 3 Comments »
24
Jul
(Beyond Pesticides, July 24, 2008) Although the text of the Department of Labor’s proposal on workplace safety standards has not been made public, the Washington Post reports that the proposal will likely weaken an already inadequate risk assessment process, thus putting workers at an even greater risk of health effects from toxic chemical exposure. This proposal follows on the heels of news that the Environmental Protection Agency (EPA) has recently lowered its value of a human life, which will make it easier to avoid environmental regulations. Peg Seminario, director of health and safety policy at the AFL-CIO, accused the Department of Labor of secrecy and said, “They are trying to essentially change the job safety and health laws and reduce required workplace protections through a midnight regulation.” According to the Post, changing the risk assessment process for workplace safety has become the priority for the Department of Labor. Undoubtedly, this prioritization came under pressure from industries, which claim that the risk assessment process overestimates worker risk. However, risk assessments, like those that the EPA employs in regulating pesticides, already allow for a 10-fold increase in risk of health effects for workers than they do for the general public. Risk assessments […]
Posted in Disease/Health Effects, Pesticide Regulation | No Comments »
23
Jul
(Beyond Pesticides, July 23, 2008) Aerial spraying for West Nile virus (WNv) over urban areas of Sacramento County, California has been halted for one week, after three days of spraying, in order to determine the success of the treatment. The results from a series of before-and-after mosquito trapping, dead bird testing and testing for infected mosquitoes are expected to take one week to complete before it is determined whether spraying should continue. The Sacramento-Yolo Mosquito and Vector Control District is hoping that previous treatments were successful in reducing infected mosquitoes and that it will not need to do more aerial spraying this season. Assistant manager, Gary Goodman, indicated that the possibility of continued spraying remains uncertain, as new data from dead bird testing, mosquito trap analyses and from human cases become available. To combat WNv, the Sacramento-Yolo district has sprayed the pesticide, Evergreen Crop Protection EC 60-6T (which contains pyrethrins) over selected urban areas. Spraying for mosquitoes over urban areas of the county started in 2005, even though aerial sprayings over agricultural fields and from the ground using trucks or hand crews have occurred for a long time. In 2005 however, WNv began spreading broadly in northern California, and Sacramento […]
Posted in California, Insect-Borne Disease, Pyrethrin | No Comments »
17
Jul
(Beyond Pesticides, July 17, 2008) In a new study published in Environmental Health Perspectives, researchers have found an increased occurrence of intersex toads in areas with greater agricultural land cover. This points to a link between certain pesticides and endocrine disruption, a change in the hormonal balance that can have sexual and reproductive effects. Such results implicate pesticides in the decline of amphibian populations, and suggests that these chemicals are also adversely affecting humans. The study, which was conducted in south Florida, looked at cane toads, Bufo marinus, at five sites with differing land use patterns ranging from suburban to nearly completely agricultural (primarily sugarcane and vegetables). Researchers examined physical characteristics such as coloration, sexual organs, and forelimb length, as well as hormone concentrations, and found a higher rate of feminization for toads in agricultural areas. In these areas, glyphosate (the active ingredient in Round Up herbicide) and atrazine (an herbicide) use is common. Tyrone Hayes, PhD, was one of the first to document the endocrine disrupting effects of atrazine on frogs in a laboratory setting. Countering any doubts of why this work is important, Dr. Hayes said, “People often say, ”˜It is just frogs, so who cares?’ Well it […]
Posted in Atrazine, Disease/Health Effects, Endocrine Disruption, Florida, Glyphosate, Wildlife/Endangered Sp. | No Comments »
16
Jul
(Beyond Pesticides, July 16, 2008) People exposed to pesticides are more likely to suffer changes in nerve responses and severe weakness in their neck and limb muscles in the days before they succumb to their symptoms. This is according to a new study, which found that the major cause of death was as a result of respiratory failure following acute organophosphate poisoning. The study entitled, “The Spectrum of Intermediate Syndrome Following Acute Organophosphate Poisoning: A Prospective Cohort Study from Sri Lanka” published in the open-access journal Public Llibrary of Science (PloS) Medicine was a collaboration between researchers from Sri Lanka, Australia, and the UK. These researchers examined and assessed 78 consenting symptomatic patients with organophosphate poisoning and found that 10 suffered severe weakness in their neck and limb muscles and five of these eventually developed respiratory failure. Respiratory failure is the major cause of death after poisoning by organophosphates. Lead author Pradeepa Jayawardane, clinical pharmacology lecturer at the University of Sri Jayawardenepura in Sri Lanka, and colleagues realized that there are changes in nerve transmission that are presented before individuals with organophosphate poisoning develop muscle weakness, also known as intermediate syndrome (IMS). IMS results in muscle weakness in the limbs, […]
Posted in Disease/Health Effects, International | No Comments »
15
Jul
(Beyond Pesticides, July 15, 2008) After three years of deliberation, the U.S. Environmental Protection Agency (EPA) proposed new rules for five highly toxic fumigant pesticides on July 10, 2008. Environmental health, community and farmworker groups say the rules, while substantially better than the past, still fall short of protecting people, workers and the environment. The rules will be published in the Federal Register on July 17, 2008.The fumigant review, mandated by the 1996 Food Quality Protection Act, was conducted as a combined evaluation of five commonly used fumigants, called the “Fumigant Cluster Assessment.” The five fumigants included in the assessment are methyl bromide, metam sodium, metam potassium, dazomet, and chloropicrin. Methyl bromide was slated for phaseout by January 2005 under the Montreal Protocol because it is a potent ozone depletor, but the Bush Administration has sought annual “critical use exemptions,” keeping it on the market. Fumigants, which are among the most toxic chemicals used in agriculture, are gases or liquids that are injected or dripped into the soil to sterilize a field before planting. Even with plastic tarps on the soil, fumigants escape from the soil and drift through the air into schools, homes, parks and playgrounds. Strawberries, tomatoes, peppers, […]
Posted in Chemicals, chloropicrin, Dazomet, Disease/Health Effects, Environmental Justice, Metam Sodium, methyl bromide | 2 Comments »
10
Jul
*July 14, 2008 Update: Officials have reported that the cause for poisoning of these Maryland residents was jimsonweed, not pesticides. Jimsonweed was found in the garden of the home where the stew had been prepared. Symptoms are similar to organophosphate pesticide poisonings. (Source: NBC4) (Beyond Pesticides, July 10, 2008) Showing just how toxic common pesticides can be, six people in Gaithersburg, Maryland who ate potentially contaminated stew have been hospitalized with probable pesticide poisoning. Reports say that mint leaves from a backyard garden that were in a potato stew are suspected to have contained organophosphate pesticide residues. Unfortunately, the media is reporting this as a case of failing to wash produce properly, which does not address the root of the pesticide poisoning problem””that pesticides are hazardous and their uses cause harm. In fact, when EPA registers pesticides for use in food production, whether in the garden or commercial agriculture, it does not disclose or warn the public about pesticide residues or require the washing of treated food commodities, and it does not point to the availability of nontoxic alternatives. The Washington Post reports, “In a textbook illustration of the importance of thoroughly washing plants and vegetables before eating them, authorities […]
Posted in Alternatives/Organics, Disease/Health Effects, Lawns/Landscapes, Maryland | 2 Comments »
08
Jul
(Beyond Pesticides, July 8, 2008) In comments filed July 7, 2008 with the Environmental Protection Agency on its new risk assessment and evaluation of the widely used anti-bacterial chemical triclosan, found in a wide range of products including soaps, toothpastes and personal care products, plastics, paints and clothing, public interest health and environmental groups point to health effects, environmental contamination and wildlife impacts and call for consumer uses to be halted. The comments, submitted by Beyond Pesticides, Food and Water Watch, Greenpeace US, Natural Resources Defense Council, Sierra Club and dozens of public health and environmental groups from the U.S. and Canada, urge the agency to use its authority to cancel the non-medical uses of the antibacterial chemical triclosan, widely found in consumer products and shown to threaten health and the environment. Triclosan and its degradation products bioaccumulate in humans, are widely found in the nations waterways, fish and other aquatic organisms, and because of triclosan’s proliferating uses, are linked to bacterial resistance, rendering triclosan and antibiotics ineffective for critical medical uses. The chemical and its degradates are also linked to endocrine disruption, cancer and dermal sensitization. “The nonmedical uses of triclosan are frivolous and dangerous, creating serious direct health […]
Posted in Pesticide Regulation, Triclosan, Water | No Comments »
07
Jul
(Beyond Pesticides, July 7, 2008) Officials have halted recovery efforts in the Philippines for bodies on the partially sunken ship MV Princess of the Stars after it was revealed that the ship’s cargo hull contains ten tons of the highly toxic pesticide endosulfan. The ship capsized and partially sank on June 21 in a typhoon, killing nearly 800 people onboard. Although the Philippines banned the use of endosulfan in 1993 because of its serious health effects, multi-national food companies Dole and Del Monte have maintained exemptions to the ban and continue to use endosulfan. In the wake of this tragedy, the potential for toxic contamination looms large and has raised frustrations for leaders in the government who are calling for an end to these exemptions, which benefit only foreign companies and threaten the health of the Philippine people. Globally, endosulfan has received substantial attention for its severe health and environmental effects. The European Union has submitted a petition that endosulfan be included in the Stockholm Convention, the international treaty regulating highly toxic, persistent organic pollutants. Endosulfan is banned in over 20 countries, including those of the European Union. Despite its known toxicity, endosulfan remains a commonly used insecticide and acaricide […]
Posted in Endosulfan, International | No Comments »
03
Jul
(Beyond Pesticides, July 3, 2008) The results of a U.S. Geological Survey (USGS) study  investigating the occurrence of selected pesticides and their degradation products in groundwater shows that these chemicals can persist for years, depending upon the chemical structure of the compounds and the environmental conditions. The study, funded by the USGS National Water-Quality Assessment (NAWQA) Program and published in the May-June issue of Journal of Environmental Quality, specifically examines several of the factors that can influence the likelihood of pesticides and their degradation products being detected in shallow ground water, including oxidation-reduction (redox) conditions and ground water residence times, at four study sites across the United States. Numerous studies over the past four decades have established that pesticides, which are typically applied at the land surface, can move downward through the unsaturated zone to reach the water table at detectable concentrations. The downward movement of pesticide degradation products, formed in situ, can also contribute to the contamination of ground water.The study reveals that the pesticides and degradation products detected most frequently in shallow ground water samples from all four areas are predominantly from two classes of herbicides””triazines and chloroacetanilides. None of the insecticides or fungicides examined are detected […]
Posted in Atrazine, Chemicals, Water | No Comments »
02
Jul
(Beyond Pesticides, July 2, 2008) Gardeners in the United Kingdom (UK) have been warned not to eat home-grown vegetables that have been exposed to the new and persistent herbicide, aminopyralid. Domestic gardens and allotments have been contaminated by manure originating from farms where the herbicide aminopyralid was sprayed on fields. All across the UK harvests of withered and rotten potatoes, beans, peas, carrots, salad vegetables and deformed tomatoes have been reported by confused and angry gardeners. It is believed that contamination of manure arose after grass was treated with aminopyralid 12 months ago. Experts say the grass was probably made into silage, and then fed to cattle during the winter months. The herbicide remained present in the silage, passed through the animal and into manure that was later sold. Aminopyralid is gaining popularity with farmers, who spray it on grassland to control weeds such as docks, thistles and nettles without affecting the grass around them. Dow AgroSciences, which manufactures aminopyralid, has made a statement on their website saying: ‘As a general rule, we suggest damaged produce (however this is caused) should not be consumed.’ Those who have already used contaminated manure are advised not to replant on the affected soil […]
Posted in aminopyralid, Chemicals, clopyralid, Lawns/Landscapes | 3 Comments »
01
Jul
(Beyond Pesticides, July 1, 2008) On behalf of the African American residents of Mossville, Louisiana, the non-profit, public interest law firm Advocates for Environmental Human Rights (AEHR) on June 23, 2008 filed with the Inter-American Commission on Human Rights (IACHR) a detailed account of the human rights abuses suffered by residents as a consequence of governmental approvals that allow industrial facilities to dump millions of pounds of toxic chemicals every year. The filing is an amended petition (Petition No. P-242-05), which includes a response to the U.S. Government’s arguments that attempt to defend its flawed environmental regulatory system that perpetuates environmental racism and denies basic human rights in Mossville and other similarly situated communities of color, according to AEHR. The petition states: “[The residents of] Mossville suffer from severe health problems, elevated levels of cancer-causing and hormone-disrupting chemicals, a devastated environment, and a deteriorated quality of life, all of which arise from governmental approvals of highly toxic industrial development in and around Mossville. The United States government and its political subdivisions have authorized fourteen industrial facilities to manufacture, process, store, and discharge toxic and hazardous substances in close geographic proximity to Mossville residents. Three of these facilities — an oil […]
Posted in Chemicals, Corporations, Disease/Health Effects, Environmental Justice, Louisiana, State/Local | No Comments »
26
Jun
(Beyond Pesticides, June 26, 2008) Over 7,500 acres of winter wheat in 15 Kansas counties were sprayed improperly with the fungicide Quilt, forcing the Kansas Department of Agriculture to put an embargo on harvestable wheat from these fields pending further tests. Farmers are legally required to wait 45 days between spraying Quilt and harvesting wheat, but this spring’s wet weather encouraged many to ignore the rules. The problem was discovered during a paperwork check of custom applicators, which revealed that some fields had been sprayed as recently as early June. Quilt, manufactured by Syngenta and registered with the Environmental Protection Agency (EPA) in 2003, is a combination of the two active ingredients azoxystrobin and propiconazole. Propinconazole is a fungicide and antimicrobial with registered uses on food and feed crops, turf and ornamentals, as well as wood and material preservation. It is estimated that 1.7 million acres of wheat alone is treated with propinconazole each year. Azoxystrobin was first conditionally registered with the EPA in 1997 for use on turf. Information on the usage of the combination of these two fungicides is unavailable because of the recent registrations. Unfortunately, the USDA has cut funding for pesticide reporting (see Daily News of […]
Posted in Azoxystrobin, Kansas, Propiconazole | No Comments »
20
Jun
(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 […]
Posted in Chlorothalonil, Chlorpyrifos, Golf, Lawns/Landscapes, Water | 3 Comments »
17
Jun
(Beyond Pesticides, June 17, 2008) A recent study at Cardiff University in Wales shows that antimicrobial wipes, including those containing triclosan, may be spreading antibiotic-resistant bacteria, rather than killing it. Researchers from the Welsh School of Pharmacy studied the bacteria methicillin-resistant Staphylococcus aureus, or MRSA, and the ability of different types of wipes to remove or kill it. They found that in “normal use” conditions, or how hospitals in Wales have been using the wipes, bacteria is only moved from surface to surface, increasing potential exposure. According to the university, “The research involved a surveillance programme observing hospital staff using surface wipes to decontaminate surfaces near patients, such as bed rails, and other surfaces commonly touched by staff and patients, such as monitors, tables and keypads. It was found that the wipes were being applied to the same surface several times and used on consecutive surfaces before being discarded.” Furthermore, in laboratory replications, the team found “that although some wipes can remove higher numbers of bacteria from surfaces than others, the wipes tested were unable to kill the bacteria removed. As a result, high numbers of bacteria were transferred to other surfaces when reused.” The findings raise concern from others […]
Posted in Antibacterial, Resistance, Triclosan | No Comments »
12
Jun
(Beyond Pesticides, June 12, 2008) A new study reports that pesticides, including DDT and tributyltin (TBT), have been found in deep-sea squids and octopods. This study is the first to analyze the chemical contamination of these deep sea organisms, and adds to the body of literature that demonstrates the far-reaching effects of pesticide use on global ecosystems. Pesticide contamination has been documented as far away from the point of use as the arctic and now the deep sea. In the study, to be published in the journal Marine Pollution Bulletin, Michael Vecchione of the National Oceanic and Atmospheric Administration (NOAA), and colleagues from the Virginia Institute of Marine Science of The College of William and Mary report finding a wide variety of chemical contaminants in nine species of cephalopods, a class of organisms that includes cuttlefishes and nautiluses along with squids and octopods. Cephalopods are important to the diet of cetaceans, which are marine mammals such as whales, dolphins and porpoises. Persistent organic pollutants (POPs) in the blubber of whales and some deep sea fish has already been documented. The twenty-two specimens analyzed were taken from depths between 1000 and 2000 meters (approximately 3,300 and 6,600 ft.) in the North […]
Posted in DDT, Tributyltin, Water | No Comments »
10
Jun
(Beyond Pesticides, June 10, 2008) According to scientists at Simon Fraser University in British Columbia, Canada, real-world pesticide combinations, such as those found in Canada’s Nicomekl River, may contribute to latest decline in the region’s endangered salmon populations. The study, published in Environmental Science and Technology (ES&T), a publication of the American Chemical Society, examines the impact by simulating the river’s low-level pesticide mixture to examine its effects on fish. The study used steelhead trout, a member of the salmon family, and found that the pesticide mix can deaden the trout’s sense of smell. This could harm the fish’s ability to avoid predators, find mates, and migrate back to sea, the researchers say, and could contribute to the threatened and endangered status of salmon species. “Most laboratory studies examine the effects of a single chemical, often at high concentrations, but real-world streams contain a mixture of chemicals at very low concentrations,” Keith Tierney, Ph.D., the study’s coauthor, told ES&T. Dr. Tierney and his colleagues re-created river water in the laboratory under controlled conditions with carefully measured levels of the 10 most frequently occurring pesticides in British Columbia’s Nicomekl River. The mixture contained four major classes of pesticides, including the commonly […]
Posted in Atrazine, Chemicals, Diazinon, Water, Wildlife/Endangered Sp. | No Comments »