Archive for the 'Pollinators' Category
26
Mar
(Beyond Pesticides, March 26, 2018) Tell your state AG to join the investigation of the merger of Bayer-Monsanto, the manufacturer of genetically engineered seeds tolerant of its herbicide glyphosate (aka Roundup®), and Bayer, the manufacturer of neonicotinoid insecticides responsible for pollinator declines, including imidacloprid and clothianidin. The giant seed and pesticide company that would be created by this merger would be a disaster for pollinators, people, and the environment. Farmers overwhelmingly think this mega-merger is a bad idea –a new survey and white paper were released that demonstrate widespread opposition of farmers to this merger. According to the poll, which was conducted by a coalition of farm organizations, 93 percent of farmers surveyed oppose it. More than one million Americans have called on the Department of Justice to stop it. Investigations are ongoing in both the EU and the U.S. Your state attorney general could play a key role in this fight by joining the investigation. Tell your state AG to join the investigation of the Bayer-Monsanto Merger! If this merger goes through, the new company would be the world’s largest vegetable seed company. It would control seeds for many of the crops we eat regularly — including broccoli, carrots, and onions. It would also be the largest manufacturer […]
Posted in Agriculture, Bayer, Glyphosate, Monsanto, neonicotinoids, Pollinators, Take Action, Uncategorized | No Comments »
20
Mar
(Beyond Pesticides, March 20, 2018) Regulations that separate ingredients in pesticide products as either “other/inert” or “active” have no scientific basis, according to a new review of the toxicity of formulated pesticide products published in the journal Frontiers in Public Health. Despite widespread awareness that “other” or “inert” pesticidal ingredients present toxicity concerns, only “active” ingredients undergo a full risk assessment, and pesticide products containing both active and inert ingredients are not tested in formulation before being sold to the public. Using glyphosate and neonicotinoid based products as examples, the study recommends sweeping changes to the way pesticide formulations are regulated in the Western world. Inert, or other ingredients –not disclosed on pesticide product labels, are often adjuvants that are added to a pesticide formulation to modify the effect of the active ingredient. However, they can also be sold separately and used in agriculture where pesticides are often “tank mixed” on site before application. Adjuvants take many forms, including surfactants, dyes, stabilizers, propellants, emulsifiers, solvents, antifoaming agents, and still other uses. Surfactants, likely the most common adjuvant, are added to a pesticide formulation in order slow the degradation time or improve the penetration of the active ingredient on a target […]
Posted in Environmental Protection Agency (EPA), Glyphosate, neonicotinoids, Pesticide Regulation, Pollinators, Uncategorized | No Comments »
14
Mar
(Beyond Pesticides, March 14, 2018) The annual count of Monarch butterflies overwintering in Mexico shows declines from last year’s numbers—a 15 percent decrease –according to figures from an official Mexican government count in the winter of 2017. These numbers underscore how at risk the iconic animal is, with a possible collapse of migration if populations are critically low. Monarch butterflies (also known as Eastern Monarchs) embark on an impressive migration every year. Roughly 99 percent of all North American monarchs migrate each winter to oyamel fir forests on 12 mountaintops in central Mexico. Scientists estimate the population size by measuring the area of trees turned orange by the clustering butterflies. But for the second year in a row, its numbers are declining — 2.48 hectares of occupied winter habitat is down from 2.91 hectares last winter. Apart from partial rebounds in the winters of 2001 and 2003, numbers have gone down steadily since 1996. Overall monarchs have declined by more than 80 percent over the past two decades. Earlier this year, Western Monarchs – those found west of the Rocky Mountains – overwinter in coastal California forests, were also found to be declining at an alarming rate, with scientists and conservation groups […]
Posted in Fish and Wildlife Service (FWS), Pollinators, Uncategorized | No Comments »
12
Mar
(Beyond Pesticides, March 12, 2018) European Regulators Confirm Neonicotinoids Harm Bees, Increasing Likelihood of Continent-Wide Ban A comprehensive assessment released last week by the European Food Safety Authority (EFSA) confirmed that neonicotinoids, the most widely used class of insecticides in the world, pose risks to honey bees and wild pollinators. EFSA analyzed over 1,500 studies from academia, beekeeper associations, chemical companies, farmer groups, non-governmental organizations, and national regulators. EFSA’s risk assessment provides a definitive, independent conclusion that overall, continued use of these chemicals risks the long-term health of pollinator populations. Tell Your Governor to Ban Neonicotinoid Insecticides “The availability of such a substantial amount of data as well as the guidance has enabled us to produce very detailed conclusions,” said Jose Tarazona, PhD, head of EFSA’s Pesticides Unit in a press release. This is EFSA’s second comprehensive evaluation of the three most commonly used neonicotinoids: imidacloprid, clothianidin, and thiamethoxam. Earlier research finalized in 2013 led the European Union (EU) to ban use of the three neonicotinoids on agricultural flowering crops. The new assessment applies EFSA guidance to assessing risks to bees and on the initial review. It includes literature not only on honey bees, but also on wild pollinators, including bumblebees […]
Posted in Bayer, Clothianidin, Imidacloprid, Increased Vulnerability to Diseases from Chemical Exposure, International, neonicotinoids, Pollinators, Thiamethoxam, Uncategorized | No Comments »
07
Mar
(Beyond Pesticides, March 2, 2018) Neonicotinoids, the most widely used class of insecticides in the world, do pose risks to honey bees and wild pollinators, according to a comprehensive assessment released last week by the European Food Safety Authority (EFSA). Encompassing an analysis of over 1,500 studies from academia, beekeeper associations, chemical companies, farmer groups, non-governmental organizations, and national regulators, EFSA’s risk assessment provides a definitive, independent conclusion that overall, continued use of these chemicals risks the long-term health of pollinator populations. After delaying a vote that would ban all outdoor uses of neonicotinoids in December in anticipation of EFSA’s assessment, the European Commission will revisit the issue as soon as March 22. “The availability of such a substantial amount of data as well as the guidance has enabled us to produce very detailed conclusions,” said Jose Tarazona, PhD, head of EFSA’s Pesticides Unit in a press release. This is EFSA’s second comprehensive evaluation of the three most commonly used neonicotinoids: imidacloprid, clothianidin, and thiamethoxam. Earlier research finalized in 2013 led the European Union (EU) to ban use of the three neonicotinoids on agricultural flowering crops. The new assessment builds upon the initial review, and includes literature not only on […]
Posted in Bayer, Environmental Protection Agency (EPA), neonicotinoids, Pollinators, Syngenta, Uncategorized | No Comments »
01
Mar
(Beyond Pesticides, March 1, 2018) A comprehensive review of notorious, bee-killing neonicotinoid insecticides finds that crop yields and on-farm profit can be maintained and improved by replacing these toxic chemicals with alternative pest management strategies. The new study is part of an ongoing update to the 2014 Worldwide Integrated Assessment undertaken by an international team of scientists called the Task Force on Systemic Pesticides. The results of this review point to the need for strong action against these chemicals by all levels of government. “Regulators need to realize that if we want sustainable agricultural practices, we need a more restrictive regulatory framework and programs to support farmers making the switch,” said Task Force co-chair and scientist at France’s National Scientific Research Centre Jean-Marc Bonmatin, PhD, in a press release. “Our findings on the availability of alternatives will be particularly relevant where new restrictions on neonics are being considered.” The Task Force reviewed 200 studies on systemic insecticides, looking at their use and pest resistance in annual and perennial crops, the viability of alternative pest management techniques, and the potential to implement alternative forms of crop insurance to cover risks, rather than spray expensive insecticides. For perennial crops, researchers focus on the […]
Posted in neonicotinoids, Pesticide Regulation, Pollinators, Uncategorized | No Comments »
26
Feb
(Beyond Pesticides, February 26, 2017) U.S. Representatives Earl Blumenauer (D-OR) and Jim McGovern (D-MA) reintroduced the Saving America’s Pollinators Act (H.R. 5015), which suspends the registration of certain neonicotinoid insecticides until the U.S. Environmental Protection Agency conducts a full scientific review that ensures these chemicals do not harm pollinators. Last week, Beyond Pesticides joined Rep. Blumenauer and other experts from environmental, conservation, whistleblower, and farmworker health groups on Capitol Hill to urge Congress to take action to protect pollinators in the face of ongoing obstruction by an increasingly industry-influenced EPA. Tell your Representative to cosponsor the Save America’s Pollinators Act!“ Pollinators are the backbone of America’s agriculture system. Acting now to protect them and stop their decline is essential to the sustainability of our nation’s food supply,” Rep. McGovern said. “Simply taking the word of the manufacturers that their products are safe is not an option. Consumers need strong oversight. That is why I am proud to join Congressman Blumenauer in demanding the EPA fully investigate the effect that certain harmful pesticides may have on the vitality of our pollinators.” Numerous scientific studies implicate neonicotinoid pesticides as key contributors to the global decline of pollinator populations. EPA’s own scientists have found that […]
Posted in Bayer, Environmental Protection Agency (EPA), National Politics, neonicotinoids, Pollinators, Take Action, Uncategorized | No Comments »
16
Feb
(Beyond Pesticides, February 16, 2018) U.S. Representatives Blumenauer (D-OR) and Jim McGovern (D-MA) this week announced plans to reintroduce the Saving America’s Pollinators Act, (previously H.R. 3040) which suspends the registration of certain neonicotinoid insecticides until the U.S. Environmental Protection Agency conducts a full scientific review that ensures these chemicals do not harm pollinators. Beyond Pesticides joined Rep. Blumenauer and other experts from environmental, conservation, whistleblower and farmworker health groups on Capitol Hill to urge Congress to take action to protect pollinators in the face of ongoing obstruction by an increasingly industry-influenced EPA. “Pollinators are the backbone of America’s agriculture system. Acting now to protect them and stop their decline is essential to the sustainability of our nation’s food supply,” Rep. McGovern said. “Simply taking the word of the manufacturers that their products are safe is not an option. Consumers need strong oversight. That is why I am proud to join Congressman Blumenauer in demanding the EPA fully investigate the effect that certain harmful pesticides may have on the vitality of our pollinators.” Numerous scientific studies implicate neonicotinoid pesticides as key contributors to the global decline of pollinator populations. EPA’s own scientists have found that neonicotinoids pose far-reaching risks to […]
Posted in Bayer, Clothianidin, dinotefuron, Environmental Protection Agency (EPA), Imidacloprid, neonicotinoids, Pesticide Regulation, Pollinators, Take Action, Thiamethoxam, Uncategorized | No Comments »
24
Jan
(Beyond Pesticides, January 24, 2018) Poor nutrition coupled with exposure to a notorious class of insecticides known as neonicotinoids act synergistically to significantly reduce the survival of honey bees and their colonies, according to research published by scientists from University of California, San Diego (UCSD). This is the first study to delve into the real-world effects pesticide exposure can have on honey bees also subject to nutritional stress, a common occurrence in the wild. The outcome of this research highlights the weaknesses of the U.S. Environmental Protection Agency’s (EPA) testing regime for registering pesticides, which does not account for the complex ecology surrounding catastrophic declines in honey bee and other wild pollinator populations. UCSD scientists looked at two of the most popular neonicotinoids, chlothianidin and thiamethoxam, to investigate how realistic levels of exposure to the chemicals interacted with varying levels of available food. High and low levels of both chemicals, 1/5 and 1/25 of the LD50 (amount at which 50% of honey bees exposed would die) were added to sugar syrup solution containing a range of different nutrition levels. Sugar syrup, which mimics nectar and honey, is a critical source of carbohydrates for honey bees. The bees studied were either […]
Posted in Agriculture, Increased Vulnerability to Diseases from Chemical Exposure, neonicotinoids, Pollinators | No Comments »
18
Jan
(Beyond Pesticides, January 18, 2018) Research published in early January 2018 has shown that — despite a partial ban on neonicotinoid insecticides instituted in 2014 — 25% of British honey is still contaminated with residue of these “potent, bee-killing” pesticides. The partial ban, which extended to flowering crops, such as oilseed rape (from which canola oil is made), was instituted by the European Union (EU) in response to evidence of serious threats to bee populations. Samples for this study came from beekeepers and were each from a single location. After the partial ban went into effect, scientists had seen some reduction in the contamination rate of neonicotinoids in honey, from greater than 50% prior to the ban. This study demonstrates that these powerful pesticides nevertheless remain common in agricultural areas, posing serious threats to bees (and other pollinators). This discovery is likely to accelerate pressure on the EU to ban all outdoor use of neonicotinoids, with a vote coming perhaps as soon as in the next few months. “While the frequency of neonicotinoid contaminated samples fell once the EU ban was in place, our data suggest that these pesticides remain prevalent in the farming environment,” said Ben Woodcock, of the UK’s […]
Posted in Agriculture, contamination, neonicotinoids, Pollinators, Uncategorized | No Comments »
12
Jan
(Beyond Pesticides, January 12, 2018) Honey bees display a concerning attraction to the herbicide glyphosate and the fungicide chlorothalonil at certain concentrations, new research from scientists at the University of Illinois (UIL) reveals. Results are reminiscent of a 2015 study published in the journal Nature, which found that honey bees display a preference for foods treated with neonicotinoids, a class of insecticides implicated in global pollinator declines. Since the crisis became public knowledge in 2006, managed honey bees have experienced unsustainable levels of colony loss, and one in four species of native bees in North America and Hawaii are at risk of extinction. This new research adds to growing concerns that, while neonicotinoids continue to play a primary role in the pollinator crisis, their elimination would still leave a myriad of other toxic chemical threats to the recovery of these critical species, upon which so much of our food supply relies. UIL scientists investigated honey bees’ preference for a range of pesticides as well as a number of naturally occurring chemicals that honey bees would likely encounter in the field. In the experiment, pollinators were put in a large enclosure and allowed to fly to different feeders stocked with either […]
Posted in Chlorothalonil, Glyphosate, Pollinators, Uncategorized | No Comments »
04
Jan
(Beyond Pesticides, January 4, 2018) Last month, the U.S. Environmental Protection Agency (EPA) released the preliminary ecological (non-pollinator) assessments for the neonicotinoids (neonics); clothianidin, thiamethoxam, dinotefuran, and the terrestrial ecological assessment for imidacloprid, finding that these pesticides pose both acute and chronic risks to aquatic life and birds. Treated seeds are identified as posing the highest dietary risks to birds, confirming previous research that neonics are highly hazardous not only to bees, but to birds, aquatic life, and other non-target organisms. Released December 15, 2017, EPA opened the public comment period for these assessments until February 20, 2018. Along with the risks identified in the assessments, the agency is specially requesting feedback on the benefits of continued use of the neonics in cotton and citrus crops identified in last year’s pollinator assessments as posing risks to honey bees. EPA states, “We believe early input from the public will be helpful in developing possible mitigation options that may be needed to address risks to bees.” This despite evidence of long-term systemic exposures to non-target organisms that support a phase-out of these pesticides. EPA believes that neonicotinoids are crucial for the management of Asian citrus psyllid, an invasive pest that causes citrus greening, […]
Posted in Aquatic Organisms, Biological Control, Birds, Canada, Clothianidin, dinotefuron, neonicotinoids, Thiamethoxam, Uncategorized | No Comments »
14
Dec
(Beyond Pesticides, December 14, 2017) Tests of waterways in the United Kingdom (UK) reveal rivers contaminated with neonicotinoids, the class of chemicals highly toxic to bees and aquatic invertebrates. And now, although neonicotinoids were banned from use on certain crops in the European Union (EU) in 2013, an EU vote to extend the ban has been delayed. The test results raise concerns over neonicotinoids’ impacts on waterways, especially to fish and birds. Under a new EU mandate -Water Framework Directive ‘Watch List’ initiative – the UK was required to monitor for all five commonly used neonicotinoids: imidacloprid, clothianidin, thiamethoxam, acetamiprid and thiacloprid. Twenty-three sites were sampled in 2016, 16 in England, four in Scotland, three in Wales and three in Northern Ireland. This is the first systematic testing of neonicotinoids in rivers in Britain. According to the results, half the rivers tested in England had either chronic or acute levels of contamination. Of the 23 rivers tested across Britain, all but six contain neonicotinoids. Eight rivers in England exceed recommended chronic pollution limits, and two are acutely polluted. Neonicotinoids are not only highly toxic to bees but also highly toxic to aquatic insects, which are a vital food source to […]
Posted in contamination, neonicotinoids, Persistence, Pesticide Residues, Water | No Comments »
11
Dec
(Beyond Pesticides, December 11, 2017) Tell the Natural Resources Conservation Service (NRCS) to substantially increase the amount of funding spent on the conservation of monarch butterflies and the restoration of their habitat, and to ensure that restored habitat is not poisoned with hazardous pesticides. Although the agency has taken some steps to protect monarchs –including the implementation of the Monarch Butterfly Habitat Development Project and support for the Monarch Butterfly Conservation Fund— last year’s NRCS expenditure of $4 million was insufficient to prevent the monarchs’ decline, and could not even begin stemming the loss of milkweed habitat. Restoring the monarch butterfly and its habitat will require a substantial contribution from the agricultural sector and strong leadership from the NRCS. Agricultural lands encompass 77% of all prospective monarch habitat, and thus are indispensable to reaching these goals. Monarch populations have fallen more than 80 percent over the last 20 years, and it is estimated that there is a 60 percent chance the multigenerational migration of these butterflies would completely collapse in the next 20 years. Milkweed, the only forage for monarch caterpillars, has decreased by 21 percent, especially in the Midwest, where agricultural fields and pesticide use have expanded. Scientists estimate […]
Posted in Biodiversity, Habitat Protection, Pollinators, Uncategorized, US Department of Agriculture (USDA), Wildlife/Endangered Sp. | No Comments »
06
Dec
(Beyond Pesticides, December 6, 2017) Last week over 100 conservation and environmental groups urged the federal government to increase funding to protect and conserve monarch butterflies. These iconic butterflies, native to North America, have seen drastic declines in their populations. Surveys report over 80 percent reductions in populations over the last 20 years. Pesticide use, habitat loss, and climate change have all been identified as stressors to these butterflies. The groups, led by the Center for Biological Diversity, Defenders of Wildlife, and the Humane Society, sent a letter to the U.S. Department of Agriculture (USDA) to do more to help the imperiled butterfly. The letter requests the agency increase the allotment of conservation funds from $4 million- spent last year- to $100 million. The increase in funds is needed for efforts to increase milkweed habitat. In contrast, the government spent over $500 million on sage grouse initiatives to prevent that animal’s listing under the Endangered Species Act (ESA), even though the Trump Administration is seeking to overturn these initiatives. Currently, the agency has taken some steps to protect monarchs. These include the implementation of the Monarch Butterfly Habitat Development Project and support of the Monarch Butterfly Conservation Fund. But, according […]
Posted in Pollinators, US Department of Agriculture (USDA), Wildlife/Endangered Sp. | No Comments »
05
Dec
(Beyond Pesticides, December 5, 2017) Fungicides are likely playing an important role in the decline of North American bumblebee populations, according to new research published by a team at Cornell University. While overwhelming data continue to indicate that insecticides, particularly the neonicotinoid class of chemicals, are the leading factor in overall pollinator declines, Cornell scientists discovered that fungicides, in particular the chemical chlorothalonil, are likely compounding risk and toxicity for U.S. bumblebee species. As new studies continue to expand the chemical culprits in pollinator declines, calls for a wholesale change in agricultural practices toward more sustainable organic production are reinforced. Cornell researchers began their investigation by focusing on what land use factors had the most impact on eight bumblebee species, many of which have been declining in the U.S. Bumblebee species were sampled at nearly 300 sites in 40 states during the summer months, and at each of the sampling sites, landscape variables were characterized and quantified for land use (urban v rural), habitat (high vs low latitude), and pesticide (insecticide, fungicide, herbicide) usage. The strongest indicator of declining range within the selected bumblebee species was found to be overall fungicide use, with those in the northern U.S. undergoing the […]
Posted in Fungicides, Pollinators, Uncategorized | No Comments »
01
Dec
(Beyond Pesticides, December 1, 2017) Ichneumonid wasps (family Ichneumonidae), are a widely distributed parasitoid wasp family within the order Hymenoptera. The name “ichneumonid” comes from Greek words meaning “tracker” and “footprint.” And females do indeed hunt for suitable “hosts” by first identifying the organism’s food source. Once a suitable host is found, females deposit eggs onto the unsuspecting insect larvae where, within ten days to several weeks, the Ichneumonid larva kills the host by feeding on its body fluids before it emerges. They are also known as “scorpion wasps” for the extreme length and curving motion of their segmented abdomens. Note: both adult males and females are stingless, and feed on nectar. The discovery of Ichneumonidae was so troubling to many that, in 1860, Charles Darwin wrote a letter to the American naturalist Asa Gray, saying: “I own that I [should wish to] see as plainly as others do…evidence of design and beneficence on all sides of us…I cannot persuade myself that a beneficent and omnipotent God would have designedly created the Ichneumonidae with the express intention of their feeding within the living bodies of Caterpillars, or that a cat should play with mice.” The parasitic behavior of Ichneumon wasps was […]
Posted in Beneficials, Biodiversity, Biological Control, Pollinators, Uncategorized | No Comments »
30
Nov
(Beyond Pesticides, November 30, 2017) A French court suspended the license of two pesticide products citing their toxicity to bees. The products, Closer and Transform, both contain the active ingredient, sulfoxaflor, which is highly toxic to bees. The ruling overturned the decision by France’s health and environment agency, ANSES, to allow the use of the sulfoxaflor products. Sulfoxaflor use was also challenged in the U.S. by beekeepers concerned about its impact on already declining bee populations. Sulfoxaflor is a relatively new active ingredient whose mode of action is similar to that of neonicotinoid pesticides. Even though it has not been classified as a neonicotinoid, it elicits similar neurological responses in honey bees, with many believing that sulfoxaflor is a new generation of neonicotinoid. Its initial 2013 U.S. registration was challenged by beekeepers and subsequently vacated by the Ninth Circuit Court of Appeals due to overwhelming risks to bees and the U.S. Environmental Protection Agency’s (EPA) inadequate review of the data. The court concluded that EPA violated federal law when it approved sulfoxaflor without reliable studies regarding the impact that the insecticide may have on honey bee colonies. By vacating EPA’s unconditional registration of the chemical, sulfoxaflor could not be used […]
Posted in neonicotinoids, Pollinators, Sulfoxaflor | No Comments »
28
Nov
(Beyond Pesticides, November 28, 2017) Bumblebees exposed to field-realistic levels of neonicotinoid insecticides have problems with “buzz pollination” that results in reduced pollen collection, according to new research published in Scientific Reports. This is the latest science to tease out the complex ways in which neonicotinoids interfere with these important pollinators, providing yet another reason to eliminate these highly toxic, systemic insecticides from the environment. Flowers that bumblebees pollinate require the insects to emit soundwaves, or ‘sonicate’ to release their pollen, and bumblebees must perfect their techniques over time in order to maximize the pollen they are able to collect. Researchers tested the effect of neonicotinoids on bumblebees’ sonication abilities by exposing them to field realistic doses of the insecticide thiamethoxam at rates of 2 parts per billion (ppb) and 10 ppb, and observing their ability to successfully collect pollen. A control group that never came in contact with thiamethoxam was also used to compare the progress of the exposed group. Lead author of the study, Penelope Whitehorn, PhD, indicated, “We found that control bees, who were not exposed to the pesticide, improved their pollen collection as they gained experience, which we interpreted as an ability to learn to buzz […]
Posted in Bayer, Beneficials, neonicotinoids, Pollinators, Syngenta, Thiamethoxam, Uncategorized | No Comments »
04
Oct
(Beyond Pesticides, October 4, 2017) Beetles in the family Cantharidae are known as soldier beetles, a name that is based on the resemblance of the elyra (wing cover) to certain military uniforms. They superficially resemble fireflies (family Lampyridae), but lack light-emitting organs and the covering obscuring the head of fireflies. Like fireflies, soldier beetles are distasteful to most predators. Range There are 16 genera containing 455 species of soldier beetles native to North America, including Chauliognathus marginatus, which is commonly seen on goldenrod in late summer and early fall. Worldwide, there are about 5,100 species in 160 genera, widely distributed in all but polar regions. Most frequently active in summer and early fall, adults can be found on various flowers including sunflowers, tansy, zinnia, marigold, goldenrod, and coneflower. Females lay eggs in clusters in the soil. Larvae are mostly carnivorous, feeding on soil insects. They live through the winter under loose soil, and become active during spring. Larvae normally pupate in early summer and adults first emerge in mid-summer. Physiology The soldier beetle’s body is around ½ to ¾ inch long. Adults are black or brown, usually with red to yellow markings, an “aposematic” signal to predators, warning of an […]
Posted in Beneficials, Pollinators, Uncategorized | No Comments »
13
Sep
(Beyond Pesticides, September 13, 2017) According to a study published in the journal Biological Conservation, Monarch butterfly populations from western North America have declined far more dramatically than was previously known and face a greater risk of extinction – 86 percent in the next 50 years. The researchers do not know the exact cause but identify habitat loss and widespread pesticide use as likely culprits. Migratory monarchs in the west could disappear in the next few decades if steps are not taken to recover the population, the study’s lead author, Cheryl Schultz, PhD, an associate professor at Washington State University Vancouver states. “Western monarchs are faring worse than their eastern counterparts. In the 1980s, 10 million monarchs spent the winter in coastal California. Today there are barely 300,000,” she said. Western monarchs (Danaus plexippus) have a spectacular migration. They overwinter in forested groves along coastal California, then lay their eggs on milkweed and drink nectar from flowers in the spring in Arizona, California, Nevada, Oregon, Washington, Idaho and Utah. They then return to their coastal overwintering sites in the fall. Eastern monarch, whose numbers are also in decline, travel instead across the border into Mexico to wait out the winter. The researchers from […]
Posted in California, Habitat Protection, Pollinators, Wildlife/Endangered Sp. | No Comments »
03
Jul
(Beyond Pesticides, July 3, 2017) A two-year long study conducted at 33 sites in multiple European countries to assess the effects of neonicotinoid (neonics) insecticides on three bee species in real-world environmental conditions confirms that these pesticides have a deleterious effect on bee survival. The study, the largest of its kind, explored the role of the agricultural use of neonics as seed coatings on bee health and fnds that the pesticides are persistent in the environment, contaminating pollen and nectar that bees forage, reducing colony fitness. The results of the study support ongoing calls for a ban on neonics, including a European Union (EU) wide ban proposed earlier this year. The new research, published in the prestigious peer-review journal Science, which was in part funded by Bayer and Syngenta – manufacturers of the pesticides, encompassed large field experiments to assess the effects of neonic-treated crops on various bee species –honey bees (Apis mellifera), bumble bees (Bombus terrestris), and solitary bees (Osmia bicornis)– across three European countries (Germany, Hungary and the United Kingdom). The study examines the impacts of clothianidin and thiamethoxam, the neonics frequently used as seed coatings of oil seed rape (canola), and used in the fields under study. […]
Posted in Agriculture, Clothianidin, neonicotinoids, Pollinators, Thiamethoxam | No Comments »
31
May
(Beyond Pesticides, May 31, 2017) Neonicotinoid-treated corn seeds produce lethal and sub-lethal exposure risks to honey bees and do not increase yields for farmers, according to a recent study by researchers at Purdue University. The study, published in the Journal of Applied Ecology, Planting of neonicotinoid-treated maize poses risks for honey bees and other non-target organisms over a wide area without consistent crop yield benefit, examines neonicotinoid (neonic) dust drift during corn planting in Indiana and the likelihood of honey bee exposure during foraging. The study results and subsequent analysis using public data of apiary locations indicate that over 94% of honey bee foragers in Indiana are at risk of exposure to varied levels of neonics, including lethal levels, during corn sowing. Researchers also performed a three-year field assessment of the purported benefits from neonic seed coatings for pest management, finding that there is no evidence of increased corn yields compared to sites with no neonic seed treatments. According to the lead author of the study, Christian Krupke, Ph.D., in an interview with Purdue Extension, “There was a misconception that any bees not living near corn were likely to be fine. But that’s not true, and it’s clear that these […]
Posted in Agriculture, neonicotinoids, Pesticide Residues, Pollinators | No Comments »