Archive for the 'Increased Vulnerability to Diseases from Chemical Exposure' Category
04
Aug
(Beyond Pesticides, August 4, 2015) Nearly every food available for purchase at the U.S. Congressional Dining Hall contains detectable levels of neonicotinoids (neonics), chemical insecticides implicated in the global decline of wild and managed pollinators. The results of a new study, performed by the American Bird Conservancy (ABC) and the Harvard T.H. Chan School of Public Health, reveals how reliance on these toxic chemicals can both directly and indirectly affect  our food supply. Authors of the study hope the results will build Congressional support for the Saving America’s Pollinators Act of 2015, which would suspend the use of neonics while an independent review analyzes the chemical’s effects to birds, pollinators, and other wildlife. Researchers for the study conducted two rounds of food testing, the first in January, and the second in May 2015. Approximately half of samples were taken from the House Longworth Cafeteria and half from Senate Dirksen Cafeteria in Washington, D.C. In total, 66 food samples were tested for the presence of neonicotinoids. Of that, 60, or 91% of samples tested positive for one neonic, and 47, or 71% of samples had two or more neonics present. “We were surprised to find that most foods contained multiple neonicotinoids, […]
Posted in Announcements, Birth defects, Chemicals, Disease/Health Effects, Increased Vulnerability to Diseases from Chemical Exposure, Learning Disabilities, Litigation, National Politics, neonicotinoids, Persistence, Pesticide Residues, Pollinators, Take Action, Washington D.C. | No Comments »
31
Jul
(Beyond Pesticides, July 31, 2015) New information has surfaced regarding the role of agrochemical giants Bayer and Syngenta in the United Kingdom (UK)’s recent decision to temporarily allow the use of neonicotinoid seed treatment on oilseed rape crop. A record of the meeting, involving the UK government’s expert committee on pesticides (ECP) and industry representatives, had previously been suppressed. The newly released record of the meeting shows that Bayer and Syngenta were the only external representatives asked to answer the ECP’s questions. The emergency use, which has been granted for 120 days, allows growers to use Bayer’s Modesto (clothianidin) and Syngenta’s Cruiser OSR (thiamethoxam). The active ingredients of these products belong to a class of toxic chemicals known as neonicotinoids  (neonics), which have been  linked  to pollinator decline. These pesticides are associated with  decreased learning,  foraging  and navigational ability in bees, as well as increased vulnerability to pathogens and parasites as a result of suppressed bee immune systems. Used widely in agriculture as seed treatment for various crops, foraging bees, in the absence of their native habitat, are exposed to fields of poison where even pollen and nectar are contaminated. In addition to toxicity to bees, neonicotinoids have been shown […]
Posted in Agriculture, Alternatives/Organics, Announcements, Bayer, Chemicals, Clothianidin, Corporations, Habitat Protection, Increased Vulnerability to Diseases from Chemical Exposure, International, Pesticide Regulation, Pesticide Residues, Pollinators, Syngenta | No Comments »
30
Jul
(Beyond Pesticides, July 30, 2015) Despite concerns for human and environmental contamination, the U.S. Department of Agriculture (USDA) adds 2,4-D-tolerant cotton, a genetically engineered (GE) crop, to the list of unregulated GE crops, joining 2,4-D resistant corn and soybeans. Last week, the Animal and Plant Health Inspection Service (APHIS) division of USDA released its decision on Dow AgroSciences’ petition to deregulate the 2,4-D resistant GE cotton. The decision was signed off by Michael J. Firko, the Deputy Administrator of Biotechnology Regulatory Services. In September of last year, Deputy Firko also signed the determination paperwork that deregulated GE corn and soybean. The deregulation essentially releases the GE organism from the regulatory requirements of 7 CFR part 340 or the plant pest provisions of the Plant Protection Act. Dow’s GE cotton, part of the Enlist Weed Control System, is resistant to 2,4-D choline, glufosinate, and glyphosate. Growers in the cotton industry have been vying for the GE cotton to enter the market in order to combat herbicide-resistant weeds due to the broad scale use of Monsanto’s RoundUp (glyphosate), which continues to fail across the agricultural industry due to weed resistance. Glyphosate is a phosphanoglycine herbicide that inhibits an enzyme essential to plant […]
Posted in 2,4-D, Agriculture, Announcements, Chemicals, Contamination, Corporations, Dow Chemical, Genetic Engineering, Glyphosate, Habitat Protection, Increased Vulnerability to Diseases from Chemical Exposure, Litigation, Monsanto, National Politics, Persistence, Pollinators | No Comments »
28
Jul
(Beyond Pesticides, July 28, 2015) Data published from the Harvard School of Public Health reveals  neonicotinoids (neonics), a class of chemicals implicated in the global decline of honey bees and other pollinators, in over 70% of both pollen and honey samples collected throughout the state of Massachusetts during months when bees are most actively foraging. The results of this study have grave  implications for pollinator health, as even minute, near-infinitesimal doses of neonics can cause sublethal impacts that compromise the health of entire bee colonies. The Harvard study, led by Chensheng (Alex) Lu, PhD, and published in the Journal of Environmental Chemistry, took monthly honey and pollen samples from 62 volunteered bee hives between April and August 2013. The 219 pollen and 53 honey samples were then analyzed for the presence of eight neonic insecticides. Every month, in every location, researchers found neonics in the pollen and honey collected by bees. In total, 73% of pollen samples and 72% of honey samples contained at least one neonicotinoid at levels which could result in sublethal harm. While previous studies have tested the presence of neonics at a single point in time, this is the first study to show the long-term persistence […]
Posted in Agriculture, Alternatives/Organics, Announcements, Chemicals, Increased Vulnerability to Diseases from Chemical Exposure, neonicotinoids, Pesticide Regulation, Pollinators, Wildlife/Endangered Sp. | No Comments »
23
Jul
(Beyond Pesticides, July 23, 2015) A recent study looks at the detrimental effects of neonicotinoids (neonics) on molluscan herbivores and their non-target insect predators, finding that slug exposure to neonics results in the secondary poisoning of beneficial predatory beetles. The study, authored by Maggie Douglas, PhD candidate at Penn State University, was presented earlier this month at a congressional briefing, An Expert Briefing to Discuss Pollinators and Efforts to Protect Them. The briefing was organized by Center for Food Safety and attended by the sponsors of Saving America’s Pollinators Act (H.R. 2692), Representatives John Conyers (D-MI) and Earl Blumenauer (D-OR). The study specifically looks at the pest slug Deroceras reticulatum and its predator beetle, Chlaenius tricolor. Ms. Douglas and her co-researchers find that neonicotinoid seed-treated soy beans can unintentionally impact predatory, beneficial insects through a previously unexplored pathway. Here are some highlights of the study’s methods and findings: Soy beans were treated with the neonicotinoid thiamethoxam. The seed treatments had zero effect on pest slugs, and instead were bioaccumulated and then transferred through the slugs into their insect predators, impairing or killing >60%. This resulted in a loss of crop due to a decline in beneficial insect predators and an […]
Posted in Agriculture, Alternatives/Organics, Announcements, Chemicals, Habitat Protection, Increased Vulnerability to Diseases from Chemical Exposure, neonicotinoids, Persistence, Pollinators, Take Action, Thiamethoxam, Wildlife/Endangered Sp. | No Comments »
29
Jun
(Beyond Pesticides, June 29, 2015) A recent study has provided supporting evidence to previous work showing that sublethal doses of imidicloprid, a toxic neonicotinoid insecticide, impairs olfactory learning in exposed honey bee workers. Since 2006, honey bees and other pollinators in the U.S. and throughout the world have experienced ongoing and rapid population declines. The science has become increasingly clear that pesticides (especially the neonicotinoid class of insecticides), either acting individually or synergistically, play a critical role in the ongoing decline of honey bees and wild pollinators. Neonicotinoids can be persistent in the environment, and have the ability to translocate into the pollen and nectar of treated plants. “Honeybees need to learn to associate nectar reward with floral odor. One of the main reasons why flowers produce odor is so that this odor can be learned by pollinators and used to repeatedly visit the same flower species. Without this repeat visitation, pollination does not occur. We showed that a neonicotinoid pesticide, at sublethal doses, harms this odor memory formation,”  Chinese Academy of Science’s Ken Tan, who led the study, told CBS News in an email interview. Published in Nature on June 18, 2015, the study finds that “adults that ingested […]
Posted in Chemicals, Increased Vulnerability to Diseases from Chemical Exposure, National Politics, neonicotinoids, Pesticide Residues, Pollinators, Take Action, Wildlife/Endangered Sp. | No Comments »
22
Jun
(Beyond Pesticides, June 22, 2015) Two new studies raise concerns over the connection between the use of fungicides and the declining overall health of bee colonies. While  the use of neonicotinoid insecticides has been established as a  primary contributor  to declining pollinator populations, these new studies shine a light on the use of fungicides and the negative impacts their use has on overall bee health. The first study was performed after a group of local farmers asked researchers at the University of Wisconsin to assess whether it was safe to spray fungicides on crops while they are in bloom and bees are foraging. Because insecticides, like neonicotinoids, are meant to kill insects, researchers have performed numerous studies on how the use of these insecticides may harm beneficial insects as well as those they are intended to target. Fungicides, however, are not meant to kill insects, so the relationship between their use and effects on bee populations is relatively unstudied. Researcher Hannah Gaines Day, Ph.D., an entomologist at the University of Wisconsin, cautions that her team’s study, which involved five bumblebee colonies kept in field enclosures where flowers were sprayed with field-realistic doses of chlorothalonil, a  common fungicide, was small and […]
Posted in Agriculture, Alternatives/Organics, Announcements, Chemicals, Chlorothalonil, Increased Vulnerability to Diseases from Chemical Exposure, neonicotinoids, Pollinators, Take Action, Wildlife/Endangered Sp. | No Comments »
18
Jun
(Beyond Pesticides, June 18, 2015) A major international study on bee pollination involving 58 researchers finds that astonishingly few bee species are responsible for pollinating crops worldwide, and offers compelling economic rationale for conserving wild bees. The study, published in Nature Communications, calculates that the value of wild bee pollination to the global food system at $3,000 per hectare of insect-pollinated agricultural land, a number in the billions globally. However, research also indicates that just two percent of wild bee species pollinate 80 percent of bee-pollinated crops worldwide. While the study shows that contribution of wild bees to crop production is significant, researchers warn that conserving the biological diversity of bees requires more than just ecosystem-service-based arguments. “Rare and threatened species may play a less significant role economically than common species, but this does not mean their protection is less important,” says Professor David Kleijn, PhD of the Netherlands’ Wageningen University, who led the study. The economic benefits to people from nature —such as crop pollination, water purification, and carbon storage— are increasingly known as ecosystem services. The fact that nature provides these services has increasingly been used as a reason to protect the environment and its biodiversity. Research strongly […]
Posted in Announcements, Environmental Justice, Increased Vulnerability to Diseases from Chemical Exposure, Pollinators, Take Action, Wildlife/Endangered Sp. | No Comments »
10
Feb
(Beyond Pesticides, February 10, 2015) Scientists at the Universities of Dundee and St. Andrews in Scotland have found evidence confirming that the levels of neonicotinoid (neonic) pesticides bees are likely to encounter in the wild impair the pollinator’s brain cells, resulting in colony declines. Bees and other wild pollinators provide services of over $125 billion globally, but are experiencing widespread and consistent losses that have the potential to increase global malnutrition and disease if not properly addressed. Although countries and regions across the globe have taken action to suspend or restrict the use of neonic pesticides in light of their threat to bees, policymakers in the U.S. continue to delay, impose inadequate changes, or even introduce new bee-toxic chemicals. The recent study, Chronic exposure to neonicotinoids increases neuronal vulnerability to mitochondrial dysfunction in the bumblebee (Bombus terrestris), published in the Journal of the Federation of American Societies for Experimental Biology, finds a mechanistic explanation for previous findings that observed poor navigation and foraging in colonies of bumblebees exposed to neonicotinoids. To do this, researchers exposed bumblebees to doses of the neonics imidacloprid and clothanidin generally expected to be seen in the field (10 nanomoles[nM]/2.1ppb), and measured the amount that accumulated […]
Posted in Chemicals, Increased Vulnerability to Diseases from Chemical Exposure, International, neonicotinoids, Pollinators, Take Action, Wildlife/Endangered Sp. | No Comments »
05
Nov
(Beyond Pesticides, November 5, 2014) New research from Pennsylvania State University reports that pesticides cause large changes in the expression of genes involved in detoxification, immunity and nutrition-sensing in bees, adding to previous research that has found that pesticides compromise bee immune function. This research also finds that bees with a diet of natural, high quality pollen exhibit greater resistance to pesticides’ deleterious effects than bees on an artificial diet. The new study, “Genomic analysis of the interaction between pesticide exposure and nutrition in honey bees (Apis mellifera),” finds that pesticide exposure can impact the expression of genes that are sensitive to diet and nutrition. The researchers, upon feeding honey bees either the miticidal pesticides, coumaphos or fluvalinate, for a period of seven days, noticed significant changes in 1,118 transcripts – or strands of RNA – in the experimental group. The transcripts include genes involved in detoxification, immunity, and nutrition. The authors report that there is substantial overlap in responses to pesticides and pollen-containing diets at the genetic level. Subsequent analyses demonstrate that pollen-based diets reduce the honey bees’ susceptibility to pesticide stress verses an artificial diet – e.g. a soy protein or no protein diet. Thus, the researchers note […]
Posted in acetamiprid, Announcements, Chemicals, Clothianidin, dinotefuron, Increased Vulnerability to Diseases from Chemical Exposure, Litigation, National Politics, neonicotinoids, Pollinators, Resistance, Take Action, thiacloprid, Thiamethoxam | No Comments »
12
May
(Beyond Pesticides, May 12, 2014) A study published in the Bulletin of Insectology substantially undercuts chemical industry arguments that neonicotinoid pesticides are not the primary contributing factor  in Colony Collapse Disorder (CCD). The results find that  hives exposed to low doses of two neonicotinoid pesticides””imidacloprid and clothianidin””do not recover from over winter losses from which  control hives quickly rebound. Researchers also discount other possible causes of CCD commonly touted by industry like diet, parasites, and pathogens. The study adds to the already expansive literature that  clearly links sublethal exposure neonicotinoid pesticides to rapid bee declines nationwide. The study, Sub-lethal exposure to neonicotinoids impaired honey bees winterization before proceeding to colony collapse disorder, was conducted in central Massachusetts during the 2012-2013 winter at three different locations with six bee colonies in each location. A third of the colonies were exposed to low doses of the pesticide imidacloprid, while another third were exposed to the pesticide clothianidin, both neonicotinoids, and the remainders were not treated. At each apiary the colonies were separated into two groups in which honey bees were fed with either sucrose water or high-fructose corn syrup (HFCS) over the study period. During the fall and winter seasons, researchers found […]
Posted in Chemicals, Clothianidin, Imidacloprid, Increased Vulnerability to Diseases from Chemical Exposure, neonicotinoids, Pollinators | 1 Comment »
