(Beyond Pesticides, February 25, 2016) Feminine care products sold in France may contain “potentially toxic residues,” according to a study conducted by 60 Millions de Consommateurs, a French consumer rights group. The study finds  traces of chemicals, such as dioxins and insecticides, in 5 of 11 products tested. A separate analysis conducted by Corman, a manufacturer of feminine care products, also finds  residues of the weedkiller glyphosate, which was classified in March 2015  as a probable carcinogen by the International Agency for Research on Cancer (IARC). Researchers at 60 Millions  reported finidng traces of halogenated waste, a by-product related to the processing of raw materials, in Tampax Compak Active Regular Fresh tampons. The researchers also detected residues of organochlorine and pyrethroid pesticides, linked to a wide range of adverse health impacts, in some Always sanitary towels. Highly toxic dioxins, which can be cause cancer, reproductive and developmental problems and damage the immune system, according to the World Health Organization, were also found in products by OB and the European Nett brands. Corman, which makes Organyc panty liners, told the Agence France-Presse (AFP) news agency that it conducted its own analysis that confirmed the trace amounts of glyphosate, the active ingredient […]

(Beyond Pesticides, February 25, 2016)  On Tuesday, the City Council of Irvine, California, with a population of over 250,000 people, voted unanimously to stop the use of hazardous pesticides on city property. The Council adopted an  organic  management policy that limits  the use of synthetic pesticides on city property, which includes 570 acres of parks, more than 800 acres of right-of-way, 70,000 trees and nearly 1.5 million square feet of facilities. The policy permits pesticides   “only when deemed necessary to protect public health and economic impact.” The vote capped a campaign led by  the local advocacy group Non Toxic Irvine, which has been advocating that the city  nix synthetic pesticides in favor of better plant management and materials compatible with organic practices. The group is led by local mothers concerned about the synthetic pesticide health risks related to children.  Kathleen Hallal, a leader with Non Toxic Irvine, said, “It is not radical for a city to use organic methods. It’s radical to use toxic methods to control weeds and pests around our children.” According to the Orange County Register, in May 2015, the Irvine Unified School District (IUSD) agreed to end the use of glyphosate (RoundUp) on all school […]

(Beyond Pesticides, February 22, 2016) A scientific review was released last week by a group of fourteen scientists in which they expressed concern over the widespread use of glyphosate-based herbicides (GBHs), the lack of understanding regarding human exposure, and the potential health impacts. Along with the reasons for concern, the scientific panel called for increased government scrutiny of glyphosate and further testing. In an excerpt from the review, the scientists’ state that,“A thorough and modern assessment of GBH toxicity will encompass potential endocrine disruption, impacts on the gut microbiome, carcinogenicity, and multigenerational effects looking at reproductive capability and frequency of birth defects.” The study, published in the journal Environmental Health, was authored by 14 health scientists mostly from universities. Pete Myers, founder and chief scientist at Environmental Health Sciences is the lead author of the report. “It’s time to call on the global science and regulatory community to step back and take a fresh look at glyphosate since everyone on the planet is or will be exposed,” said senior author Charles Benbrook, an agricultural economist and consultant at Benbrook Consulting Services. According to the report, federal health agencies, such as the U.S. National Toxicology Program, the U.S. Centers for Disease […]

(Beyond Pesticides, February 19, 2016) Pesticide mixtures are more harmful than individual pesticides, according to a University of California, Los Angeles (UCLA) study that focuses on three commonly used fumigants — chloropicrin, Telone, and metam salts. The study also concludes that, while California law requires the Department of Pesticide Regulations (DPR) and county agricultural commissioners to assess these kinds of cumulative risks when regulating pesticides, they have so far failed to do so. The report, titled Exposure and Interaction — The Potential Health Impacts of Using Multiple Pesticides: A Case Study of Three Commonly Used Fumigants, was published by the Sustainable Technology and Policy Program, based in the UCLA School of Law and the UCLA Fielding School of Public Health. The case study of the three fumigants, which are commonly applied together in California on high value crops, such as strawberries, tomatoes, tree nuts, and stone fruits, finds that: These pesticides may interact to increase the health risk for California farm workers and residents, Workers and residents are regularly exposed to two or more of these pesticides simultaneously, and DPR does not regulate the application of multiple pesticides to prevent or decrease risks to human health, despite having authority to […]

(Beyond Pesticides, February 18, 2016) Last week, 35 members of Congress, led by Representatives Earl Blumenauer (OR-3) and Peter DeFazio (OR-4), signed a letter to Environmental Protection Agency (EPA) Administrator Gina McCarthy, challenging  EPA’s review process for the  glyphosate  and  2,4-D  herbicide mixture, known as Enlist Duo. It is produced by Dow AgroSciences for use in genetically engineered  crops. The letter requests “more information about EPA’s plan to reevaluate Enlist Duo’s health and environmental risks.” The letter comes just weeks after the 9th U.S. Circuit Court of Appeals denied a request from EPA to vacate its own decision to  approve the  toxic herbicide cocktail. Because of the court’s decision, EPA is solely responsible for the decision about Enlist Duo’s registration. “This is part of a vicious cycle that is leading to more potent, dangerous chemicals being widely used on crops across the United States,” said  Rep. Blumenauer. He continued, “With the rise of herbicide-resistant genetically modified crops, herbicides are more widely sprayed causing weeds to grow more resistant — ultimately, requiring the application of even stronger herbicides. EPA must take action to make sure products entering the market to be used on our food are safe for human health and […]

(Beyond Pesticides, February 12, 2015) A new study published last week asserts a viral epidemic driven by parasitic mites is contributing to the global decline in bees, problematically underplaying the significant impact that bee-toxic neonicotinoid insecticides have on pollinator populations, as supported by a growing body of scientific literature, especially findings that show bees’ increased vulnerability to parasites and viruses. Researchers of the study, titled “Deformed wing virus is a recent global epidemic in honeybees driven by Varroa mites” and published in the journal Science, conclude that the deformed wing virus (DWV), which is typically transmitted through its main vector, the Varroa mite, is globally distributed and recently spread from a common source, European honeybee Apis mellifera. Lead researcher Lena Bayer-Wilfert, PhD, of the University of Exeter, said European bees are at the heart of the global spread of what she calls a “double blow” for colonies. “This is clearly linked to the human movement of honey bee colonies around the globe,” she told BBC News. Co-researcher Professor Roger Butlin of the University of Sheffield said DWV was a major threat to honey bee populations across the world with the epidemic “driven by the trade and movement of honeybee colonies.” […]

(Beyond Pesticides, February 9, 2016) Last week, Bayer CropScience reneged on an agreement with the U.S. Environmental Protection Agency (EPA) to voluntarily cancel the conditionally registered insecticide flubendiamide if  the agency  received  data that  identified adverse ecological effects. Based on the data, EPA found that the chemical causes “unreasonable adverse effects” to benthic organisms living in sediment near agricultural fields. Bayer’s defiance in the face of EPA’s finding  points to  a fundamental  weakness in  the agency’s conditional pesticide registration process, which allows toxic chemicals onto the market without a complete and comprehensive assessment  of their  potential  harm, in this case to  wildlife and the vital ecosystem services they provide. In 2008, EPA granted Bayer a “conditional” registration for flubendiamide, a classification that allows a new pesticide to be registered and used in the field, despite outstanding data points on its toxicological impact. In this case, original data submitted to EPA by Bayer showed concern over the effect of the chemical and its breakdown product on freshwater benthic invertebrates, species such as crustaceans and aquatic insects that  live in stream sediment and provide important ecosystem services such as decomposition and nutrient cycling. In response, rather than declining to proceed with registration […]

(Beyond Pesticides, February 4, 2016) According to a study published in Oxford University Press, entitled High Levels of Resistance in the Common Bed Bug, bed bugs have developed resistance to neonicotinoids (neonics). Neonics have become one of the most widely used active ingredients to control bed bugs since the insects’ have exhibited  resistance to other chemicals, including synthetic pyrethroids.  Troy Anderson, Ph.D., entomologist at Virginia Tech and Alvaro Romero, Ph.D., entomologist at New Mexico State, studies found higher neonic  efficacy for neonics used on lab bed bugs as compared with bed bugs found in domestic settings. With the resurgence of bed bugs across the U.S., exterminators have relied heavily on insecticides to manage the pesky pests, despite questions about efficacy due to resistance, and viability of alternative, non-toxic solutions. To test the tolerance and ineffectiveness of pesticides used on bed bugs, Drs. Anderson and Romero used four popular neonics (imidacloprid, acetamiprid, dinotefuran, thiamethoxam) to compare their effectiveness in wild and isolated bed bug populations. Bed bugs isolated in a lab died quickly from a small amount of neonics, however, those same chemical treatments used on bed bugs found in Cincinnati and Michigan were ineffective. The isolated group of bed bugs […]

(Beyond Pesticides, January 29, 2016) This week, the 9th U.S. Circuit Court of Appeals handed a victory to Dow Chemical Company and its  efforts to keep the toxic pesticide Enlist Duo on the market, despite new safety concerns identified by the Environmental Protection Agency (EPA).  Enlist Duo has been marketed as a “solution” for the control of glyphosate-resistant weeds in genetically engineered (GE) crops, brought on by the  widespread use of Monsanto’s  Roundup  on glyphosate-tolerant (Roundup Ready) crops over the last decade. EPA asked the court at the end of November, 2015 to vacate its 2014 approval of Enlist Duo based on new information on the  toxic effects associated with the synergistic interactions of  the chemical cocktail of 2,4-D, glyphosate, and other undisclosed ingredients in the product to plants outside the treated area, including endangered plants. The three-sentence order, which does not include  the judge’s reasoning, denied EPA’s request. While considering other legal options, EPA can choose  to exercise it administrative powers by  canceling specific uses or the entire  registration of Enlist Duo under  its pesticide cancellation process, and within that process could choose to identify an imminent hazard and remove the pesticide from the market immediately, while it faces […]

(Beyond Pesticides, January 25, 2016) Monsanto filed a lawsuit in California last week seeking to prevent glyphosate, the main ingredient in its Roundup herbicide, from being added to California’s  list of known carcinogens under the state’s Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). Glyphosate is  classified  as a probable carcinogen by the World Health Organization’s International Agency for the Research of Cancer (IARC) based on sufficient  evidence  of carcinogenicity in experimental animals. This is the highest level carcinogen based on laboratory animal studies  under  IARC’s rating system. California law requires the state to keep a list of cancer-causing chemicals to inform residents of their risks. California Office of Environmental Health Hazard Assessment (OEHHA) said in September that it planned to add glyphosate to the list after the World Health Organization’s International Agency for Research on Cancer (IARC) classified it as a probable human carcinogen last March. Monsanto has disputed the assessment, citing decades of studies deeming glyphosate safe, including a 2007 study by OEHHA that concluded the chemical was unlikely to cause cancer. The agrochemical company said it filed the suit against the state’s OEHHA, citing the agency’s acting director, Lauren Zeise, in California state court, […]

(Beyond Pesticides January 22, 2016) Last week, the Oregon Department of Agriculture (ODA) released a list of pesticide products available for use on marijuana cultivated within the state. The list, which contains 257 pesticide products, aligns with similar product lists published by Washington State and Colorado, and raises the same concerns over the allowance of products that violate the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA) and have not been subject to health evaluations of public exposure to the pesticides used. Those concerns were on full display last week in Colorado, when the Colorado Department of Agriculture (CDA) held a public meeting to discuss amendments to its Pesticide Applicators’ Act that would allow growers to use pesticides that violate FIFRA. Additionally, in an attempt to address consumers’ concerns over the issue of unregulated pesticides in marijuana, two lawmakers in Colorado introduced a bill that would establish a program for certifying marijuana as “pesticide free” within the state. Oregon Releases List of Approved Pesticides for Cannabis Growers Like Colorado and Washington, the Oregon list construes broad label language to allow the use of pesticide products that have not been specifically tested for use on marijuana, despite the fact that the Environmental […]

(Beyond Pesticides, January 21, 2016) The Pest Management Regulatory Agency (PMRA) of Health Canada announced Tuesday that it intends to discontinue the granting of new conditional registrations under the Pest Control Products Act. In the U.S., conditional registrations have been controversial because they allow pesticide use  without complete data, as was the case with the neonicotinoid insecticide chlothianidin, linked to the decline in bee health. A startling number of pesticides, nearly 65% of the more than 16,000 pesticides now on the market, were first approved by the process of “conditional registration,” a loophole in which EPA allows new pesticides on the market without the full range of legally mandated toxicity tests.   Currently, the Pest Control Products Regulations grants conditional registration for pesticides only when “the review of the scientific data and information is sufficient to determine that the risks of a pesticide are acceptable, but PMRA requires additional information, such as monitoring data after a product registration, to confirm the results of models used in the risk assessment.” Because this change will only affect new registration applications and less than  one percent of all existing pesticide registrations in Canada are conditional, this action is unlikely to have a large […]

 (Beyond Pesticides, January 20, 2016) Aldi Süd, the German supermarket chain with stores in the U.S., has become the first major European retailer to ban pesticides toxic to bees, including the neonicotinoids imidacloprid, clothianidin and thiamethoxam, from fruits and vegetables produced for their stores. Aldi has requested suppliers comply at the earliest possible time. In light of the growing pollinator crisis and due to public pressure, retailers in Europe and the U.S. are slowly beginning to make the switch away from bee-toxic pesticides. Beginning January 1, suppliers of fruits and vegetables to Aldi suppliers will have to ensure that their cultivation practices do not include the following eight pesticides identified as toxic to bees (thiamethoxam, chlorpyrifos,  clothianidin, cypermethrin, deltamethrin, fipronil, imidacloprid and sulfoxaflor) to meet  the new requirement. According to a press release from Greenpeace, the chemicals are used on various commodities in Europe  —thiamethoxam (used in lettuce and endive), chlorpyrifos, clothianidin (used in kohlrabi, herbs, Brussels sprouts, head cabbage, cauliflower and kale), cypermethrin (leek, head cabbage and leguminous vegetables), deltamethrin (cauliflower, peppers, eggplant, zucchini, cucumber, pea, head cabbage, tomato and lettuce),  imidacloprid (applied to apples, peaches, apricots and lettuce). Sulfoxaflor was recently granted regulatory approval in Europe, despite calls […]

(Beyond Pesticides, January 14, 2016) Bayer CropScience, revising its stance,  has decided to concur with the  Environmental Protection Agency’s (EPA) preliminary risk assessment of neonicotinoids and acknowledge the finding of harm to honey bees in certain crops. A spokesman for Bayer CropScience said the neonic-selling giant has reviewed the assessment and found it to be “quite good and scientifically sound,” according to a news report.  The Guardian  is reporting that Bayer will be proposing new protections for pollinators, however the company has not yet announced what the new protections will be. This is a stark turnaround from  Bayer’s statement last week, which said EPA’s assessment “appears to overestimate the potential for harmful exposures in certain crops, such as citrus and cotton, while ignoring the important benefits these products provide and management practices to protect bees.” Last week, EPA released its preliminary honey bee risk assessment for one of the most widely used neonicotinoids, imidacloprid, which is  linked to severely declining honey bee populations. The assessment found  harmful residues of the insecticide  in crops where the pollinators forage  and confirmed bees’ widespread and sustained exposure to the highly toxic and persistent chemical through poisoned pollen and nectar. Imidacloprid, like the other […]

(Beyond Pesticides, January 13, 2016) Last Friday, the Willapa Grays Harbor Oyster Growers Association (WGHOGA) in Washington State sent a 71-page request to the Washington Department of Ecology (Ecology) asking state regulators to approve  a permit to  spray neonicotinoid insecticides  that are having devastating effects on the ecosystems worldwide. Yet, WGHOGA is pursuing a single-minded approach to chemically control the shrimp that are hurting their oyster crops, while using chemicals that the preponderance of science finds cause ecosystem imbalance. In  April 2015, much to the dismay of activists and concerned local residents, Ecology approved a permit for the use of imidacloprid (a neonicotinoid) to combat a growing native population of burrowing shrimp that threatens  valuable shellfish (oyster) beds in Willapa Bay and Grays  Harbor. But, with a  nationwide public outcry, the permit was withdrawn in May 2015. Ecology sent KING 5, a local Washington news agency, the below statement last Friday: “We received the permit application this morning from the Willapa Grays Harbor Oyster Growers Association to use imidacloprid on shellfish beds. It will take some time for us to review the 71-page application. On May 3 (2015) the Oyster Growers Association asked Ecology to withdraw their permit. Since then, […]

(Beyond Pesticides, January 11, 2016) Scientists at Sussex University in the United Kingdom (UK) have found that bumble bees and honey bees are exposed to a harmful chemical cocktail when collecting pollen from wildflowers and hedgerows that border neonicotinoid-treated crops in UK farmland. After testing oilseed rape croplands during blooming season, these chemical cocktails were found to be mixed with fungicides and insecticides, and at concentrations much higher than expected.  According to the Soil Association, which supported the study, “These chemical cocktails could make the impact of neonicotinoids up to 1,000 times more potent than previously realized.” With at least 121 different agrochemicals detected in hive wax and pollen samples in the Unites States, most of which include systemic pesticides, it is becoming increasingly more important to study the synergistic effects of pesticides in and outside of farm land. The study focused on “determining which mixtures of commonly used fungicides occur alongside neonicotinoids” and found that all individual oilseed rape pollen samples contained at least six neonicotinoid and fungicide residues. To compare, three neonicotinoid and six fungicides were detected in wildflower pollen samples. While the wildflower contamination was expectedly lower than crop contamination, the rate of bee contamination paints a […]

(Beyond Pesticides January 8, 2016) This week the Center for Food Safety, on behalf of several beekeepers, farmers and sustainable agriculture and conservation groups, filed a lawsuit in federal court on Wednesday  charging  the Environmental Protection Agency (EPA) with a  failure to adequately regulate neonicotinoid insecticide seed coatings used on dozens of crops throughout the U.S. The suit alleges that EPA has illegally allowed millions of pounds of coated seeds to be planted annually on more than 150 million acres  nationwide, constituting a direct violation of the registration requirements established by  the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA). Absent adequate assessment of the serious ongoing environmental harms associated with coated seed use, as well as failure to require the registration of coated seeds and enforceable labels on seeds bags, this lawsuit demands immediate action to protect beekeepers, farmers and consumers from the harms associated with neonicotinoid coated seeds. Neonicotinoids are a class of insecticides that share a common mode of action that affects the central nervous system of insects, resulting in disorientation, paralysis and death. Neonicotinoid pesticides are tied to  recent pollinator declines by an ever-growing body of science. Just this week EPA released a preliminary honey bee risk […]

(Beyond Pesticides, January 7, 2016) A long-awaited U.S. Environmental Protection Agency (EPA) preliminary honey bee risk assessment, released yesterday, for one of the most widely used pesticides linked to severely declining honey bee populations confirms harmful residues of the chemical in crops where the pollinators forage, including citrus and other crops.  While EPA finds the insecticide imidacloprid, a neonicotinoid or neonic pesticide, at various levels in crops, the assessment confirms bees’ widespread and sustained exposure to the highly toxic and persistent chemical through poisoned pollen and nectar. EPA’s assessment failed to address risks posed to wild bees and widespread exposure through soil and water. [See  docket with EPA documents, for which EPA has set a 60-public comment period.] “We cannot incorporate highly toxic and persistent chemicals into virtually all agricultural crops and ornamental plants without detrimental impacts on large populations of bees, butterflies, and birds and other organisms important to a healthy ecosystem on which life depends,” said Jay Feldman, executive director of Beyond Pesticides, a science and advocacy group based in Washington, DC. “Even low level exposures to bees over vast acreage represent an unsustainable threat,” he continued. Other toxic pesticides in the neonicotinoid class of insecticides have been […]

(Beyond Pesticides, December 21, 2015) Last week, the U.S. Senate passed legislation (S.697, Frank R. Lautenberg Chemical Safety for the 21st Century Act) by unanimous consent to update  the Toxic Substances Control Act (TSCA) of 1976, the national law that regulates industrial chemicals. Before the bill becomes law, it must go to conference committee to iron out the differences of a much different version of the bill approved in June by the U.S. House of Representatives (H.R. 2576, TSCA Modernization Act of 2015). If the differences are reconciled and passed by both Houses of Congress, it will  then go to President Obama for signature. Mike Belliveau, executive director of Environmental Health Strategy Center in Maine, in a press release, issued the following statement in response to the Senate action: “Although improved, the Senate bill remains badly flawed. In a shameful give-away to chemical manufacturers and other multinational industries, the Senate bill would actually weaken current law.” The House bill lacks the same flaws that appear in the Senate bill. The House bill does not give a free pass to toxic toys or take away (preempt) the authority of the states to regulate these toxic materials. The serious problems with the […]

(Beyond Pesticides, December 8, 2015) Exposure to common agricultural pesticides in early life leads to a measurable decrease in children’s lung functioning, according to researchers from the University of California, Berkeley. Organophosphate pesticides, a relatively older generation of crop chemicals still widely used on farms in California, have been associated with a broad range of diseases in both children and adults. This latest study adds to calls from health and environmental advocates to eliminate these toxic pesticides in agriculture, and move towards safer, sustainable, and organic management practices. The higher the rate of organophosphate exposure, the smaller a child’s lung capacity would be, scientists found. The UC Berkeley study traces exposure by looking at pesticide metabolites in urine five  times over the course of childhood (6 months to 5 years). Participants were part of the Center for the Health Assessment of Mothers and Children of Salinas (CHAMACOS), a longitudinal birth cohort study investigating the effects of pesticides and other environmental chemicals on the growth, health, and development of children in California’s Salinas Valley. For every 10-fold increase in pesticide metabolites measured in a child’s urine, an average of approximately 8% air function within the lungs was lost. “Researchers have described […]

(Beyond Pesticides, December 3, 2015) Last month, the European Commission and member states approved the new pesticide flupyradifurone. The department, known as Directorate-General for Health and Food Safety, authorized the approval of the pesticide, which is an insecticide in  the chemical class  butenolides. Bayer Crop Sciences, the creator of flupyradifurone, touts the insecticide as a “safe” alternative to neonicotinoids (neonics), although both neonics and butenolides are systemic, persistent, and acutely toxic to adult honey bees. Already launched in the United States, Mexico, Nicaragua, Guatemala, Honduras, and the Dominican Republic, advocates are pointing to the hasty nature of flupyradifurone’s approval and the lack of scientific research supporting its use. Flupyradifurone, marketed as “Sivanto prime” in Europe, is approved for use in the EU on sucking pests that feed on fruits and vegetables as well as specialty crops such as hops.  It is also approved for use in seed coatings. The chemical is neurotoxic and can inhibit nicotinic acetylcholine receptors (nAChR) in the nervous system. Neonicotinoids, widely  criticized for their harmful effects on bees,  affect the nervous system in the same way. Matthias Haas, Ph.D., Global Project Manager at Bayer CropScience says, “It combines efficacy and convenience for the grower with excellent […]

(Beyond Pesticides, November 24, 2015) The Canadian province of Quebec has announced plans for a major overhaul of its pesticide laws in order to protect pollinators, public health and the wider environment. Canadian provinces, particularly Quebec and Ontario, have long led the way in crafting common sense pesticide legislation that responds to sound science on the dangers of these chemicals. The proposed reforms will focus on further restricting the most toxic pesticides allowed for use in both agriculture and residential pest control, including atrazine, chlorpyrifos, and the neonicotinoid class of insecticides, which are  widely implicated in pollinator declines. “Québec has made progress in recent years with respect to responsible pesticide management,” said the Quebec Minister of Sustainable Development, Environment and the Fight Against Climate Change. “However, the time is  right to intensify our efforts and become even more proficient at reducing the risks to health and the environment that are associated with pesticide use, particularly by supervising the use of highest-risk pesticides like neonicotinoids, which have a recognized major effect on bee mortality.” Quebec’s Pesticide Strategy 2015-2018  is structured  to incentivize farmers and home gardeners to choose lower risk pesticides through economic motivators such as levies, permits, and compensation fees. […]

(Beyond Pesticides, November 23, 2015) Commonly-used pesticides can impact aquatic species over multiple weeks, even when chemicals are no longer detectable in water nor  monitored by regulators, according to new research. The study, titled A long-term assessment of pesticide mixture effects on aquatic invertebrate communities,  published in the journal Environmental Toxicology and Chemistry, investigates the long-term effects on aquatic invertebrate communities of commonly-used insecticides: two pyrethroids (permethrin and lambda-cyhalothrin) and an organophosphate (chlorpyrifos). Pesticide applications were based on environmentally relevant concentrations and lethal concentrations (a concentration required to kill a certain percentage of animals tested) ranging from 10% (LC10) to 50% (LC50). Researchers made repeat applications in order to mimic runoff events in a multiple grower or homeowner watershed. The results indicate that insecticide mixtures continue to impact natural systems over multiple weeks, even when bound to particles and no longer detectable in water. Combinations of indirect and direct effects caused consequences across the food chain. Pyrethroids rapidly dissipated from the water column, whereas chlorpyrifos was detectable even six weeks after application. “The effects we observed indicate that many species were affected at a sublethal level,” said Simone Hasenbein, Ph.D., lead author of the study tells Phys.org. “Thus, populations exposed […]