(Beyond Pesticides, February 16, 2022) Pesticide exposure disturbs the gut microbiome of social bees, leading to a range of alterations that could affect fitness in the wild, finds a major literature review recently published by researchers at the University of Ottawa, Canada. With research on bee gut microbiomes is still in its infancy, the review provides a centralized overview of data collected to date, and highlights areas for further research to fill in remaining knowledge gaps. “Social bees have gut microbiotas that contribute to their health, just like we (humans) do,” said Michelle Hotchkiss, a PhD candidate in the Faculty of Science at the University of Ottawa. “Further research on the interactions between pesticides, bee gut microbiotas, and bee hosts will help us better understand how pesticides affect bee health and performance.” To conduct their review, scientists collected research relating to bee gut over the last 50 years. “The earliest studies we found were published in the 1970s and the most recent ones in 2020,” said Dr. Hotchkiss. “We summarized what methods were used to collect data, including which bee hosts and pesticides were examined. To summarize how the abundances of core microbes changed after pesticide exposure, we looked at […]

(Beyond Pesticides, February 2, 2022) Over the last 40 years, dragonfly species have declined in the United States due to an interplay between increasing pesticide use and rising temperatures from climate change, according to a recent study published in Ecological Applications by researchers at the University of Ottawa. The study highlights the need to evaluate and address insect declines on a macroecological scale, as human activities over the last several decades have become key drivers of Earth system processes in the Anthropocene era. At this macroecological level, the authors call for analysis of multiple interacting stressors, including land use change, pesticide applications, precipitation, and temperature. To conduct their macro-scale analysis, researchers used a dataset consisting of over 200,000 observation records for dragonflies in the U.S since 1980. Then, U.S. land was subdivided into 100 x 100 km (62 x 62 mile) quadrants, and observation records plotted and refined to ensure that at least 15 species were observed in each quadrant used. Datasets were also obtained on land use changes (via HYDE dataset), pesticide applications (via U.S. Geological Survey), and changes in precipitation and temperature (via Climatic Research Unit). Review of the data found that out of 104 dragonfly species, each […]

(Beyond Pesticides, January 28, 2022) Do city dwellers, who typically have smaller-sized greenspaces on their lots, have any role to play in supporting pollinators? Absolutely, according to a recent study of Bristol, England residential gardens. The researchers find that the amount of “floral resource” — the abundance of actual blooms, which translates roughly to amount of nectar production — varies widely across gardens and yards, and that small urban gardens and greenspaces are actually some of the most pollinator-friendly resources. The study notes that that several factors influence how well these resources provide food for pollinators, most important among which are pollinator-friendly management practices. Beyond Pesticides notes that there are multiple resources in the U.S. on making gardens and greenspaces “friendly” and useful to pollinators, including its own BEE Protective guidance on garden and landscape management, and that employing organic management practices is critical. The researchers hope to “develop evidence-based management recommendations to support pollinator conservation in towns and cities.” Their paper, published in the Journal of Applied Ecology, reports that the size of the Bristol gardens they studied actually had minimal relationship to the amount of nectar produced by the plants in them. There are factors beyond size that determine the […]

(Beyond Pesticides, January 26, 2022) Officials in New Jersey and New York are taking action to protect their states’ declining pollinator populations by restricting  outdoor uses of neonicotinoid (neonic) insecticides. In New York, the state Department of Environmental Conservation announced it would make these pesticides “restricted use,” and only available to state certified applicators. In New Jersey, A2070/S1016, sponsored by state Senator Bob Smith and Assemblyman Clinton Calabrese, was signed by Governor Phil Murphy last week after years of advocacy from national, state, and local pollinator and environmental groups. “The law relies on the most up-to-date science to ban the largest uses of neonics in the state,” said Lucas Roads, staff attorney at the Natural Resources Defense Council. “This is great news for not just pollinators that are poisoned by neonics, but for all the farmers who depend on insect pollination and for all New Jerseyans that value thriving ecosystems.” A2070/S1016 provides for a targeted phase-out of outdoor uses of bee-toxic neonicotinoids, chemicals implicated not only in the decline of pollinators, but also the collapse of entire ecosystems. Beginning 12 months after passage, the bill requires state agencies classify neonicotinoids as “restricted use.” Under this designation, only certified pesticide applicators […]

(Beyond Pesticides, January 6, 2022) Seeds treated with neonicotinoid insecticides contaminate honeydew, often the biggest source of food for pest predators, according to recent research published in the journal Environmental Pollution. Concerned advocates for pollinators and pesticide reform are likely familiar with fact that neonicotinoids are systemic, and once applied to a seed or sprayed on a plant are taken up by the plant and distributed throughout the pollen, nectar and dew drops that a plant produces. But there is another systemic effect that is not included in that picture, and in monoculture crops, it could be the biggest source of carbohydrates for beneficial pest predators – honeydew. Honeydew is produced from phloem-feeding (sap sucking) pests like aphids, whiteflies, leafhoppers, and other hemipteran insects. The waste that these insects produce is liquid, and full of sugars. “This rich carbohydrate source is a common food for many beneficial insects, including pollinators, such as bees and flies, and some natural enemies of pests, such as ants, wasps and beetles,” said John Tooker, PhD, coauthor of a recent literature review published in Biological Reviews. “Honeydew often is more abundant than nectar in agroecosystems.” In 2019, a study published in the Proceedings of the […]

(Beyond Pesticides, December 10, 2021) In a win for pollinators, a California Superior Court has issued a ruling that sulfoxaflor, a systemic pesticide that is “field legal” but “bee lethal,” can no longer be used in the state. The suit was brought by the Pollinator Stewardship Council and the American Beekeeping Federation. The ruling of the Superior Court of the State of California for Alameda County finds that the argument of the petitioners — that sulfoxaflor approval decisions by the California Department of Pesticide Regulation (DPR) violated the California Environmental Quality Act (CEQA) — is valid. Eliminating this highly bee-toxic pesticide from use in the state is expected to protect not only native bees and other pollinators (including Monarch butterflies in early Spring), but also, the many millions of managed-colony bees that are transported to California for pollination of almond and other crops. The suit was filed against DPR, Corteva inc., Dow Agrosciences LLC, the Siskiyou County Department of Agriculture, and James E. Smith as Siskiyou County Agricultural Commissioner. Having found for the petitioners’ request for a Writ of Mandate (a court order requiring a lower court or public authority to perform its statutory duty), the court instructed the petitioners to […]

(Beyond Pesticides, December 7, 2021) One exposure. That’s all it takes for wild bees to experience declines in reproduction and population growth from neonicotinoid insecticides, according to research recently published in the Proceedings of the National Academy of Sciences (PNAS). This incredible sensitivity is exactly the sort of process that could rapidly drive pollinator species into extinction. It is the sort of finding that one would expect government agencies tasked with protecting the environment to discern. Yet, regulators at the U.S. Environmental Protection Agency’s (EPA) Office of Pesticide Programs have consistently failed to listen and meaningfully respond to the latest science. As this is done, the agency is fully aware that ever more pollinators are slated for endangered status, jeopardizing our agricultural economy, ecosystem stability, and the joy we all gain from watching our favorite pollinators flit about the landscape. Over the course of two years, researchers established a crossed experiment with ground-nesting blue orchard bees (Osmia lignaria). These pollinators, native to North America, overwinter and nest in narrow holes or tubes, making them particularly sensitive to ground-based pesticide applications. Researchers conducted their study during the first year by exposing a group of larval bees to the neonicotinoid imidacloprid through […]

(Beyond Pesticides, November 11, 2021) Evidence is building that so-called ‘inert’ ingredients in pesticide formulations are harming pollinators and undermining regulatory determinations that designate products as ‘bee-safe.’ According to a new study published in Scientific Reports, the fungicide Amistar causes lethal and sublethal effects that can be primarily attributed not to its active ingredient azoxystrobin, but to alcohol ethoxylates, a co-formulant, or inert ingredient intentionally added to a pesticide formulation. While the U.S. Environmental Protection Agency (EPA) utilizes a ‘bee advisory box’ on pesticide labels to indicate danger to pollinators, results of this and previous studies on inert ingredients underline how EPA’s ‘cute little bee icon’ is little more than window dressing for massive regulatory failures and a pollinator crisis that has shown no signs of abating. Scientists at Royal Holloway University in London, UK began their study with three packaged colonies of Bombus terrestris, a European bumblebee often bred for commercial use in greenhouses throughout the world. In order to suss out differences in toxicity between the various ingredients in the formulated Amistar fungicide, bees were separated into multiple groups. One group acted as a positive control, and was dosed with dimethoate, a pesticide known to be highly toxic […]

(Beyond Pesticides, November 10, 2021) The diversity and abundance of freshwater aquatic insects plunges when commonly used neonicotinoid (neonic) insecticides leach into waterways, finds research published in the Proceedings of the National Academy of Sciences this month. While this is the latest study exploring the effects of neonicotinoids in the field at real-world exposure levels, it is far from the first to show unacceptable hazards to wildlife and ecological health. As research on neonics piles up, advocates are watching in dismay as regulators at the Environmental Protection Agency (EPA) fail to respond to the science and allow indiscriminate poisoning to continue. To determine how neonicotinoids affect critical aquatic species near the bottom of the food chain, researchers created a series of 36 experimental ditches, split into four groups of nine. One group acted as a control and received no pesticide, and each other group received, 0.1, 1.0, or 10 parts per billion (ppb) of the thiacloprid, a neonic insecticide often cited by industry and regulators as having lower toxicity concerns than other neonicotinoids. Mimicking a pulse that may come from a nearby insecticide application, each group of ditches was dosed every two weeks for a period of three months. Scientists […]

(Beyond Pesticides, October 27, 2021) Declines in pollinator populations throughout the world may result in the loss of tens of thousands of wild flowering plants that rely on their services, according to research published this month in the journal Science Advances. “Our paper provides the first global estimate of how many plant species mostly or completely rely on animal pollinators to make seeds and thus to reproduce,” wrote author James Rodger, PhD, in an article in The Conversation. “We found that it’s about 175,000 plant species – half of all flowering plants. This means declines in pollinators could cause major disruptions in natural ecosystems, including loss of biodiversity.” Pollinators are being threatened with multiple interacting stressors, from climate change, to pesticide use, disease, habitat destruction, and other factors. In the US, an increasing number of pollinators, including iconic species like the American bumblebee and monarch butterfly, are being added or in consideration for listing under the Endangered Species Act. Systemic neonicotinoid insecticides implicated for their earth-spanning hazards to pollinator populations themselves put 89% or more of U.S. endangered species at risk. Many are aware of the fact that pollinators help make available one in three bites of food. Research studies […]

(Beyond Pesticides, October 25, 2021) The Environmental Protection Agency (EPA) is requesting public comments on its draft Biological Evaluations (BEs) for neonicotinoid insecticides imidacloprid, clothianidin, and thiamethoxam by 11:59 pm (EDT) on Monday, October 25, 2021. The BEs will factor into EPA’s registration review decisions on the three bee-toxic insecticides. Written comments must be submitted through Regulations.gov. Please feel free to cut and paste parts of  Beyond Pesticides’ comments (linked here) or cut and paste into Regulations.gov the suggested comment language at the very bottom of this alert.  Tell EPA to protect endangered species from pesticides. EPA’s Biological Evaluations for these highly toxic chemicals make no agency conclusion or recommendation that would trigger a request to initiate formal Endangered Species Act (ESA) §7(a)(2) consultations with the U.S. Fish and Wildlife Service (USFWS) to determine a possible jeopardy finding for the listed species and requisite mandatory use restrictions of the relevant pesticide. This, despite the fact that for imidacloprid the agency’s draft Biological Evaluation made a May Affect determination for 89% of the 1821 species considered and 90% of the 791 critical habitats considered. Strikingly, a May Affect determination was made for 100% of amphibian and avian listed species and their […]

(Beyond Pesticides, October 5, 2021) The U.S. Fish and Wildlife Service (USFWS) will consider listing the American bumblebee (Bombus pensylvanicus) under the Endangered Species Act, according to a notice published in the Federal Register late last month. Earlier this year, the Bombus Pollinator Association of Law Students at Albany Law School and the Center for Biological Diversity petitioned the agency to list the species. USFWS review of the petition indicates that it found “substantial scientific or commercial information indicating that the petitioned actions may be warranted,” and will determine over the next year whether final listing and further protective actions are warranted.  With the American bumblebee experiencing an 89% decline in its population over the last 20 years, scientists and advocates  believe it is critical for USFWS to take steps to protect what remains of this iconic species. At one time, the American bumblebee’s range extended from eastern Canada south through the United States into Florida, and as far west as California. Oregon is the only state in the continental US where the species has never been spotted. Declines are particularly pronounced in the northern part of its range, where recent sightings are nil, and assessments for states like New […]

(Beyond Pesticides, September 17, 2021) Against the backdrop of what The New York Times in 2018 called the “insect apocalypse,” and the dire plight of pollinators in particular, Friends of the Earth (FOE) recently issued its retailer scorecard, which benchmarks “25 of the largest U.S. grocery stores on pesticides, organic offerings and pollinator health”— with the vast majority of retailers failing to protect pollinators. FOE reporting shows some, but far too slow and anemic, progress by corporate actors in enacting pollinator- and bee-friendly policies across both retail sites and supply chains. Such policies, to be genuinely effective and protective of pollinators (and human health), would eliminate or at least dramatically reduce the presence of pesticides in the food supply. The path out of the chemical pesticide quagmire is organic: companies must do more to move suppliers to organic, regenerative production practices, and EPA should be pulling these toxic compounds from the market. Tracking the pollinator policies and enforcement activities of various huge companies yields a useful barometer in monitoring the travel of pesticides to the consumer. Yet the results in the FOE scorecard — e.g., only two of those 25 retailers scored even in the “B” range, and 21 scored […]

(Beyond Pesticides, September 8, 2021) The U.S. Environmental Protection Agency (EPA) last month released a long-overdue biological evaluation of the three most commonly used neonicotinoid (neonic) insecticides, finding that the chemicals are likely to adversely affect the lion’s share of endangered species and their habitat. While the public may be most familiar with the damage neonics cause to pollinator populations, EPA’s evaluation highlights the widespread, indiscriminate harm scientists throughout the world have been sounding the alarm about for years. Advocates say the findings make it clear that neonicotinoids must be immediately banned from use. Under the Endangered Species Act (ESA), EPA is required to consult with federal wildlife agencies and conduct a biological evaluation of the impacts a pesticide may have on endangered species and their habitats, prior to the agency formally registering the pesticide. This almost never happens. EPA regularly fails to conduct this evaluation, requiring environmental and conservation organizations to sue the agency in order to force compliance with the law.   EPA has been subject to a number of legal challenges over the last decade for its failure to comply with ESA when it registered neonics pesticides. In 2019, Ellis v Housenger (EPA), a lawsuit filed by […]

(Beyond Pesticides, August 17, 2021) “If the bee disappears from the surface of the earth, man would have no more than four years to live.” This quote is often attributed to Albert Einstein (although its true origins are unknown), but it begs an important question: What are the consequences to humankind of a world where pollinators are rapidly declining? Modern-day scientists have begun to explore that question, and a group of 20 experts recently published a global-scale assessment of the risks associated with the ongoing worldwide decline of pollinator populations in the journal Nature Ecology and Evolution. While the study experts do not provide such a dire time frame, the message unfortunately is not too far off from the Einstein-attributed quote. “What happens to pollinators could have huge knock-on effects for humanity,” said lead study author Lynn Dicks, PhD from the University of Cambridge, UK. “These small creatures play central roles in the world’s ecosystems, including many that humans and other animals rely on for nutrition. If they go, we may be in serious trouble.” With a study objective of identifying the key drivers and implications for global pollinator decline, a group of 20 pollinator experts from throughout the world […]

(Beyond Pesticides, August 4, 2021) Neonicotinoid insecticides applied to nursery plants sold at garden centers kill off wild, solitary pollinators regardless of the amount applied, according to research published in the Proceedings of the Royal Society B. The news is unlikely a surprise for those tracking the science around pollinator declines, but nonetheless a stark reminder of the lack of progress from federal regulators to stop practices that contribute to the ongoing crisis. With new science consistently showing unacceptable hazards to pollinator populations, advocates are urging Congress to take up and pass the Saving America’s Pollinators Act. Since 2006, scientists and beekeepers have singled out neonicotinoids, a class of systemic insecticides, for their role in pollinator die-off and decline. Once applied onto a seed or sprayed on a plant, neonicotinoids distribute themselves throughout the plant’s structure. This causes soft-bodied sucking insects like aphids to be killed when they eat any part of the plant. However, neonicotinoids also make their way into the pollen and nectar the plant produces, as well as the dew drops plants will secrete and pollinators will often use to grab a quick drink. The use of these insecticides on native plants sold at nursery stores throughout […]

(Beyond Pesticides, July 16, 2021) Recently published research reviews the 2013 Wilsonville, Oregon mass bumblebee die-off from application of the neonicotinoid dinotefuran on 55 linden trees in a big-box-store parking lot. In that single event, the research paper (published in Environmental Entomology) estimates between 45,830 and 107,470 bumblebees from some 289–596 colonies were killed. Reporting on the new study, by Entomology Today, quotes primary conclusions of the co-authors: “Our study underscores the lethal impact of the neonicotinoid pesticide dinotefuran on pollinating insect populations,” and, “It is likely that the vast majority of mass pesticide kills of beneficial insects across other environments go unnoticed and unreported.” As Beyond Pesticides has chronicled, the U.S. and the world are undergoing a pollinator crisis, caused in significant part by agricultural pesticides. Dinotefuran, the neonicotinoid (neonic) that killed those Oregon bumblebees, is used against fleas, thrips, tree-boring caterpillars, emerald ash borers, hemlock woolly adelgids, and in the Oregon case, aphids. Entomology Today (ET) notes that the timing of this particular application could not have been worse: it happened on a warm day when the linden trees were in full flower and the bees out in force. Ironically, it occurred during Nation Pollinator Week. ET pens a […]

(Beyond Pesticides, July 13, 2021) Bumblebees exposed to pesticides and pathogens display changes in gene expression that can be pinpointed and analyzed by cutting edge research tools, according to scientists at York university, who utilized the new technique in a study published in Molecular Ecology. This form of next-generation gene sequencing is part of a growing field of science known as conservation genomics, in which entire animal genomes are sequenced to determine conservation problems. “Next-generation sequencing is a totally new way to think about why bees are declining, which could revolutionize conservation biology,” says study coauthor Amro Zayed, PhD, associate professor in biology at York. “We’re looking directly at bee tissues  to try and get clues to the stressors that are affecting this bee. I think this is a gamechanger for sure. With a single study, we are able to implicate a couple of really obvious things we’ve talked about for years – pathogens and pesticides – in the case of Bombus terricola.” Researchers focused on Bombus terricola – the yellow banded bumblebee, as its range has declined significantly over the last two decades. The bumblebee was once common throughout the eastern and midwestern part of the U.S. and Canada, […]

(Beyond Pesticides, July 12, 2021) During Pollinator Week 2021 in June, U.S. Representatives Earl Blumenauer (D-OR) and Jim McGovern (D-MA) reintroduced the Saving America’s Pollinators Act (SAPA) to reverse ongoing declines in wild and managed pollinators. New data released in June for 2020-21 documents the second highest honey bee losses in 15 years. SAPA uses the latest scientific research and perspectives to ensure that pollinators are protected. The bill suspends the use of neonicotinoid (neonic) insecticides and other pesticides harmful to bees and other pollinators until an independent board of experts determines that they are safe to use, based on a strong scientific assessment. Ask your elected representative in Congress to support pollinators by cosponsoring Saving America’s Pollinators Act (SAPA). If they are already a cosponsor, use this occasion to thank them for their leadership on this critical issue. “Without our world’s pollinators, the world would be a very different place. These bees, butterflies, hummingbirds, and other creatures are essential elements of our food system. Losing them means we risk losing the very food we put on our table,” said Rep. Blumenauer. “We must use every tool at our disposal to provide pollinators with much-needed relief from bee-toxic pesticides and monitor […]

(Beyond Pesticides, July 2, 2021) The second highest bee loss in 15 years has reported by the Bee Informed Partnership (BIP) in its 2020–2021 National Colony Loss and Management Survey, released on June 30. For the “winter” period of October 1, 2020 through April 1, 2021, approximately 32% of managed bee colonies in the U.S. were lost. This represents an increase of 9.6% over the prior year’s winter loss and is roughly 4% higher than the previous 14-year average rate of loss. For all of the past year (April 1, 2020 to April 1, 2021) the colony loss was 45.5%. Beyond Pesticides has covered the related issues of Colony Collapse Disorder (CCD), the ongoing and devastating impacts of pesticides on bees and other pollinators, and the larger context of what some have called the “insect apocalypse.” These recent BIP data appear to indicate that “we,” writ large, are failing to remedy these problems. Three out of four food crops globally depend on pollinators, at least in part. Commercially kept bees account for a significant portion of pollination of some U.S. crops; almonds are the leading crop, followed by apples and melons. The commercial bee business is huge — a $691 million […]

(Beyond Pesticides, June 29, 2021) Maine Governor Janet Mills (D) last week vetoed legislation prohibiting the aerial use of glyphosate and other dangerous herbicides in forestry practices. LD125, An Act To Prohibit the Aerial Spraying of Glyphosate and Other Synthetic Herbicides for the Purpose of Silviculture, was supported by a wide range of health and conservation groups, and aimed to bring the state in line with best practices for public health and the environment. With Maine recently passing one of the strongest consumer bans on pollinator-toxic neonicotinoids, advocates are dismayed by the setback from the Governor’s office. In a statement to Maine Public Radio, Senate President Troy Jackson said that Governor Mills should stop referring to herself as an environmentalist. “The science across the country, across the world, says that this stuff kills people, kills wildlife,” Mr. Jackson says. “And all that it is, is a giveaway to the large landowners so they can maximize their profits off the lives of the people in Maine and the wildlife in Maine.” Senator Jackson’s words are stern yet factual. Glyphosate has been identified by the World Health Organization as a probable human carcinogen. Monsanto, now owned by Bayer, has been the subject […]

(Beyond Pesticides, June 24, 2021) This Pollinator Week 2021, U.S. Representatives Earl Blumenauer (D-OR) and Jim McGovern (D-MA) are reintroducing the Saving America’s Pollinators Act (SAPA) in an effort to reverse ongoing declines in wild and managed pollinators. SAPA uses the latest scientific research and perspectives to ensure that pollinators are protected. The bill suspends the use of neonicotinoids and other pesticides harmful to bees and other pollinators until an independent board of experts determine that they are safe to use, based on strong scientific assessment. “Without our world’s pollinators, the world would be a very different place. These bees, butterflies, hummingbirds, and other creatures are essential elements of our food system. Losing them means we risk losing the very food we put on our table,” said Rep. Blumenauer. “We must use every tool at our disposal to provide pollinators with much-needed relief from bee-toxic pesticides and monitor their populations to ensure their health and survival.”  Neonicotinoids are systemic pesticides; once applied to a seed or sprayed on a plant they make their way into the pollen, nectar and dew droplets that plants produce and pollinators feed upon. Exposure impairs pollinator navigation, foraging, and learning behavior, and also suppresses their […]

(Beyond Pesticides, June 23, 2021) Small streams are prone to excessively high levels of pesticide contamination that are even more hazardous than once thought, according to a pilot study generated by a team of German researchers. The results indicate significant risks for the health of aquatic ecosystems and should be used as evidence for establishing greater protections from toxic pesticide use, researchers say. With many aquatic benchmarks set by the U.S. Environmental Protection Agency lower than those established in Germany and the European Union, and evidence of widespread pesticide contamination in America’s waterways, the study could have even greater weight for for U.S. regulatory agencies’ deficiencies. Scientists established monitoring sites at more than 100 streams throughout Germany over the course of two years. Most sites were established near farm fields, where chemical farmers will use highly toxic pesticides than often make their way into local waterways. Streams were monitored for pesticide concentrations, with particular eye to whether they met the country’s regulatory acceptable concentration (RAC value) in a given water body. The RAC value is intended to be the highest level at which there will be no adverse effects on aquatic life, however these regulatory levels often do not correspond […]