(Beyond Pesticides, February 19, 2025) In Global Ecology and Conservation, a study of bat species in organic desert date palm plantations highlights the invaluable ecosystem services these beneficial organisms provide. “Bats are crucial in suppressing pest arthropods in agroecosystems, contributing vitally to sustainable agriculture,” the study authors share, which makes supporting bat populations important not just for biodiversity but to help enhance their roles in pest management.    There are various studies connecting organic agriculture and the value it provides for bats and their ecosystem services. (See studies here, here, and here.) While many studies also recognize bat species threatened by pesticides, habitat loss, and climate change, “the importance of bats in agriculture in extreme environments, such as deserts, has received far less attention,” the researchers state. (See previous coverage on pesticide exposure and bats here and here.) They continue, “Date palm plantations represent one of the few productive systems in hyper-arid regions,” noting the study’s novel design. The date palm, primarily grown throughout the Middle East and North Africa, is one of the earliest domesticated fruit trees. “The date palm cultivation’s monocultural nature increases susceptibility to pest infestations due to limited plant diversity, involving 112 mite and insect species.” […]

(Beyond Pesticides, September 16, 2024) After the release of a hard-hitting study last week published in Science that pinpoints the cycle of increasing pesticide use with ecosystem and bat decline, resulting in higher infant mortality, Beyond Pesticides is calling for state and local action to transition public land to organic practices. Without a healthy ecosystem, the study documents increased pesticide use with dramatic adverse health effects. To take corrective action, Beyond Pesticides’ action asks governors and mayors to do the following: Eliminate the use of pesticides that imperil bats by adopting biodiversity conservation goals including— (1) ecological mosquito management with measures that recognize the benefit of preventive strategies, establish source reduction programs to manage breeding sites on public lands, educate on the management of private lands, employ programs for larval management with biological controls, and eliminate the use of toxic pesticides; (2) prohibition of systemic insecticides and treated seeds, including neonicotinoids; and (3) land management on public lands—including hospitals, higher education institutions, schools, and parks—using regenerative organic principles and organic certified practices and products, to transition to a viable organic system that prioritizes long-term health of the public, ecology, and economy. The new research connects declines in bat populations with increased […]

(Beyond Pesticides, September 10, 2024) Results from a natural experiment, published in Science, shows ecosystem disruption of bat populations with cascading impacts on human health. Eyal Frank, PhD, an assistant professor of the Harris School of Public Policy at the University of Chicago, links increased insecticide use in croplands in the absence of bat species to a rise in infant mortality. As Dr. Frank says in an article in Science Daily, “[B]ats do add value to society in their role as natural pesticides, and this study shows that their decline can be harmful to humans.”  Many farmers rely on bats as alternatives to pesticides to protect their crops from insects, but White-Nose Syndrome (WNS) has greatly impacted bat populations since 2006. With the collapse of many bat populations in counties in North America, these farmers turn to toxic chemicals to replace the ecosystem services bats usually provide. These chemicals, however, lead to ripples through the ecosystem and endanger human health.  WNS is an invasive fungus (Pseudogymnoascus destructans) found in caves that affects bats during hibernation. As highlighted in an article in the New York Times, three species of bats in North America have been decimated by this syndrome, and bats […]

(Beyond Pesticides, September 9, 2024)  Comments are due by 11:59 PM EDT on September 30, 2024. With the opening of the public comment period on organic standards that determine the integrity, strength, and growth of the organic agricultural sector, a study was released last week that shows degradation of the ecosystem linked to increased infant mortality associated with higher pesticide use by chemical-intensive farmers compensating for losses in bat populations. It is well known that bats, among other wildlife including birds and bees, provide important ecosystem services to farmers by helping to manage pest populations and increase plant resilience and productivity. While degradation of ecosystems is attributable to many factors, pesticide use accounts for an important element in harm to bats and biodiversity. The study, “The economic impacts of ecosystem disruptions: Costs from substituting biological pest control,” published in Science, concludes with a finding  that “insect-eating bat population levels induce farmers to substitute with insecticides, consequently resulting in a negative health shock to infant mortality.” Daily News will cover this study in depth in an upcoming edition. According to research published in the Journal of the Association of Environmental and Resource Economists (2022), bat population declines cost American farmers as much as […]

(Beyond Pesticides, June 23, 2023) Pollinators are especially important to the ecosystem. They pollinate plants by going from flower to flower and transferring pollen. Without pollinators, availability would be severely limited or cut off to many delicious foods, such as apples, almonds, cherries, blueberries, pumpkins, and many others. Many types of pollinators, like honey bees, bumble bees, and butterflies, are declining due to loss of habitat, widespread use of toxic pesticides, parasites, and disease. Help these important beneficial creatures by Not using toxic pesticides Planting pollinator habitats, like colorful flowers, gardens, and trees Telling your friends and family all about the importance of pollinators. Wild and Managed Bees Wild and managed bees play a crucial role in the global food system. About two-thirds of the world’s most important crops benefit from bee pollination, including coffee, cacao, and many fruits and vegetables. Wild pollination is becoming increasingly important with the growing instability of managed honey bee colonies. According to one study, wild bees’ agricultural value is now similar to that of honey bees, which are no longer considered wild in many regions due to their intense management. While many may prefer butterflies and birds to pay a visit to their gardens […]

(Beyond Pesticides, June 20, 2023) Welcome to National Pollinator Week, during which time we recognize—and take action to protect—this important ecosystem link. Pollinators—bees, butterflies, birds, bats, and other organisms—make a critical contribution to plant health, crop productivity, and the preservation of natural resources, but their existence is threatened by their pesticide-contaminated habitat.   Check out this week’s calendar of activities and actions below! On social media, we will be featuring Pollinator Artwork submitted by the community, as well as the numerous cute (and “not so cute!”) pollinators that live in the world around us!  Also, check out our live Pollinator Poll! Follow us and like our page on Facebook, Twitter, Instagram and LinkedIn!  Monday: Juneteenth and Environmental Justice  As Pollinator Week launches with the celebration of Juneteenth, it is time to renew our commitment to environmental justice while seeking the adoption of transformational policies and practices that recognize the urgency to address disproportionate harm inflicted by toxic pesticide use.   Those fighting for environmental justice understand that the harms inflicted by toxic chemical production and use cause disproportionate adverse effects on people of color—from fenceline communities near chemical production plants to the hazardous and inhumane working conditions in agricultural fields, to […]

(Beyond Pesticides, May 18, 2022) Bat population declines are costing American farmers as much as $495 million each year, finds research published this month in the Journal of the Association of Environmental and Resource Economists. Since 2006, a devastating fungal pathogen known as  Pseudogymnoascus destructans has torn through U.S. bat populations, causing a disease known as White Nose Syndrome that has killed over 90% of northern long eared, little brown, and tricolored bats. As researchers try to get a handle on the devastating and rapidly spreading disease, the effects are becoming apparent in agriculture as farmers lose their critical ecosystem services. “Lost bat populations have harmful ripple effects on food and agriculture,” says study coauthor Amy Ando, PhD. “Crop yields fall and input costs rise as farmers try to compensate for the services bats usually provide. That drives down the value of farmland and the number of acres planted, and the supply shock probably also hurts consumers as ag production becomes more costly.” White nose syndrome and its fungal pathogen were first discovered in a cave in New York in the mid-2000s, having likely traveled from Europe on the gear of a hiker or spelunker. The syndrome is characterized by […]

(Beyond Pesticides, April 27, 2022) Pesticides can accumulate in aquatic fly larvae, be retained through metamorphosis, and represent a source of chronic pesticide exposure to birds and bats, according to research published in Environmental Science and Technology earlier this month. As population declines among these critical wildlife continue to mount, findings like these highlight the complex ways in which human activities are further stressing natural systems. Pesticide reviews conducted by the U.S. Environmental Protection Agency (EPA) are limited to an outdated set of studies conducted by the pesticide industry, and generally reject and dismiss emerging science from independent literature. This myopic focus on industry studies has brought widespread contamination to the natural world that necessitates wholescale changes at EPA through Congressional action. With widespread acknowledgement that older pesticide chemistries, such as organochlorines like DDT and aldrin, bioconcentrate in living organisms, researchers aimed their study at present use fungicides and herbicides that have not yet undergone similar scrutiny. This includes seven fungicides—azoxystrobin, boscalid, cyflufenamid, fluopyram, tebuconazole, pyrimethanil, and trifloxystrobin—and two herbicides—napropamide and propyzamide. The study notes that formulated end use products, rather than technical grade active ingredients, were used in order to best mimic real world exposure conditions. Larvae of the […]

The organic solutions to problems highlighted in the latest issue of Pesticides and You—based on the importance of healthy ecosystems and public health protection—are within reach, and the data creates an imperative for action now that phases out pesticides within a decade, while ensuring food productivity, resilient land management, and safe food, air, and water. (Beyond Pesticides, April 15, 2022) The current issue of Pesticides and You, RETROSPECTIVE 2021: A Call to Urgent Action, is a look at a year of science, policy, and advocacy that informs both the existential problems that the U.S. and the world are facing due to toxic pesticide dependency, and solutions that can be adopted now. The information in this issue captures the body of science that empowers action at the local, state, and federal level, and provides a framework for challenging toxic pesticide use and putting alternatives in place. The issue finds that 2021 was a pivotal year in both defining the problem and advancing the solution. This year in review is divided into nine sections that provide an accounting of scientific findings documenting serious pesticide-induced health and environmental effects, disproportionate risk to people of color and those with preexisting conditions, regulatory failures, at the same time […]

(Beyond Pesticides, September 29, 2021) Bats foraging in chemical-intensive banana plantations have much less gut diversity than bats foraging in organic banana fields and natural forestland, finds research published this month in the journal Frontiers in Ecology and Evolution. Although there is increasing recognition that a diet of conventional, chemically grown food leads to adverse disruptions of the gut microbiome (also known as dysbiosis), little research has been conducted on the effect of production practices on the gut of wild foraging species. According to the present study there are significant differences that regulators must begin to account for in pesticide risk assessments, and consumers should consider when making choices at the supermarket. Researchers focused their investigation on Pallas’s long-tongued bat (Glossophaga soricina), a nectar feeding bat native to Central and South America. The bat is highly adapted to human environments, sustaining populations in both conventional and organic banana plantations, as well as surrounding forest land. For the study, researchers trapped nearly 200 bats across the country of Costa Rica over a 22-month time span. After trapping, physiological characteristics, like size and body weight, were measured, and bat guano was analyzed for its microbial population. All sampled bats were released back […]

(Beyond Pesticides, March 19, 2021) As reported by VTDigger, Vermont’s Endangered Species Committee recently took action to uphold the state’s endangered species law. The committee announced that a mosquito control program in the Champlain Valley, which uses the toxic pesticides malathion and permethrin, is threatening five species of endangered bats — all of which are on Vermont’s list of threatened and endangered species. The committee voted unanimously to recommend to the state Secretary of the Agency of Natural Resources that the spraying program in the Brandon, Leicester, Salisbury, Goshen, Pittsford Insect Control District be allowed only via special permit. Learn about safer mosquito management and insect-borne diseases at Beyond Pesticides website pages. The bats inhabit the Insect Control District’s five towns, which are host to important feeding habitat for these creatures, as well as maternal roosting colonies where baby bats are born and raised during the months when the pesticides are typically sprayed. In addition, the nighttime spraying of these compounds along 190 miles of road in these communities hangs in the air for hours, putting nocturnally active bats — who fly through the toxic mist or consume insects contaminated with the chemicals — at risk. Mason Overstreet of Vermont […]

(Beyond Pesticides, December 10, 2020) A new test developed by a team of Mexican and Canadian scientists will help field researchers detect early warning signs of pesticide exposure in wild bat populations. There are relatively few studies on the effects of pesticide exposure on bat populations, the authors note in a study published in Environmental Toxicology and Chemistry, but there is considerable need to monitor the health of these important species. “Access to resources might be limited for institutions with less financial support such as conservation NGOs and researchers in developing countries,” said co-author Natalia Sandoval-Herrera, PhD. “The use of early warning biomarkers such as genotoxic effects are most needed in these regions, where the use of pesticides is extensive and there is high biodiversity.” The test in question is referred to as a micronucleus test. Although it does not measure the level of pesticide contaminating a bat’s body, it can assess genotoxicity (the effect of pesticides and other chemical agents that damage genetic information in a cell). This is done by taking blood samples of bats, and testing for the presence of micronuclei formation, which are materials in blood that contain damaged chromosomes not incorporated into a cell after […]

(Beyond Pesticides, April 29, 2020) The terrible reputation with which bats are commonly saddled — especially now, because of their association with the origins of the family of coronaviruses — is undeserved. These nocturnal insect vacuums are fascinating, flying mammals that are under-appreciated, not least for their performance of important services for ecosystems, and for human health and agriculture. Investigators from Israel’s Ben-Gurion University and the Section for Evolutionary Genomics at Copenhagen’s Natural History Museum recently published a study demonstrating that bats can be a mighty tool against pests that damage cotton crops. Bats’ pest control services — relatively invisible because they do their insect marauding at night when humans are not watching — represent an excellent, nontoxic, biological control for some agricultural pests, as well as for mosquitoes that may be human disease vectors. Advocates say that these services should be well considered before any decision to use toxic pesticides that can harm bats, as Beyond Pesticides has covered. The study, “An appetite for pests: Synanthropic insectivorous bats exploit cotton pest irruptions and consume various deleterious arthropods,” was published in Molecular Ecology. [Note: “synanthropic” species are those plants or animals that live near, and benefit from, association with humans […]

(Beyond Pesticides, May 2, 2017) The Mexican long tongued bat is the pollinator of the month for May.  The Mexican long tongued bat, scientific name Choeronycteris mexicana, is a species of bat aptly named for its tongue, which has the remarkable ability to extend to nearly a body length. It is less-commonly referred to as the hog-nosed bat. Range The Mexican long-tongued bat’s range extends from the southwest of the United States through Mexico and into Central America, according to the International Union for Conservation of Nature (IUCN). In the United States, the bat is restricted to the far-south of California, Arizona, Nevada, New Mexico, and Texas. It is found in most areas of Mexico but is absent from the Yucatan peninsula and the gulf coast. Further south, the bat is also found in southern Guatemala and El Salvador in addition to northern Nicaragua. The Mexican long-tongued bat participates in seasonal migrations rather than hibernation. The Texas Parks and Wildlife Department admits that the study of the bat’s migratory patterns has been inadequate. However, it is known that the females establish maternity roosts in the southwest of the United States in late spring. They and their young depart for Mexico […]

(Beyond Pesticides, October 31, 2013) Bats get a bad rap on Halloween with their image synonymous with blood-sucking vampires; however, the real scary thing about bats is that they are disappearing due to a myriad of threats, including pesticides, habitat destruction, and the horrible white-nose syndrome (WNS), a disease caused by the fungus Pseudogymnoascus (Geomyces) destructans. Researchers are reporting an even bleaker picture, finding very little evidence of what might stop the disease from spreading further and persisting indefinitely in bat caves. The new study, from researchers at the Illinois Natural History Survey at the University of Illinois, found that the fungus can make a meal out of just about any carbon source likely to be found in caves, said graduate student Daniel Raudabaugh, who led the research under the direction of survey mycologist Andrew Miller, Ph.D. The study, Nutritional Capability of and Substrate Suitability for Pseudogymnoascus destructans, the Causal Agent of Bat White-Nose Syndrome is published in PLOS One. “It can basically live on any complex carbon source, which encompasses insects, undigested insect parts in guano, wood, dead fungi and cave fish,” Mr. Raudabaugh said. “We looked at all the different nitrogen sources and found that basically it can […]

(Beyond Pesticides, February 15, 2013) Bats around the U.S. are being decimated by White Nose Syndrome (WNS). The deadly disease was detected recently at Kentucky’s Cumberland Gap National Historic Park, according to the National Park Service. Based on laboratory testing, three bats were discovered with WNS, coming from three separate caves in the park. The cold-loving fungus thrives on hibernating bats, spreading in 2006 from a cave in New York State to 21 other states in the East and Midwest. In 19 of these states there have been confirmed cases of WNS, not including detections in four Canadian Provinces (see map).  White nose syndrome is usually transmitted bat-to-bat, although the spore can also spread through human clothing, shoes or gear. The fungus causing WNS, Geomyces destructan, is extremely lethal to hibernating bats–though posing no health threats to humans, pets, or other animals– killing 90% of bats where the fungus had persisted for a year or more, totaling 5.8 million bat deaths since 2006. There are six species of cave-dwelling bats that are susceptible to WNS, including the endangered Indiana bat. There are also three species of tree-dwelling bats in the parks, but these are less at risk for contamination as […]

(Beyond Pesticides, August 28, 2012) New research reveals that bats may be at greater risk from pesticide exposure than previously suspected. When foraging at dusk, bats can be exposed to agricultural chemicals by eating insects recently sprayed with pesticides. A study from the University of Koblenz-Landau in Germany reveals that bats, due to their long life span and tendency to only have one offspring at a time, are particularly sensitive to reproductive effects from pesticides. The study, “Bats at risk? Bat activity and insecticide residue analysis of food items in an apple orchard,” published in Environmental Toxicology and Chemistry, details the health effects of bats foraging on insects in an apple orchard after it was sprayed with the insecticides fenoxycarb and chlorpyrifos. After field applications of the pesticides, scientists measured the remaining chemical residues on flies, moths and spiders for two weeks. The highest residues were recorded on leaf dwelling insects and spiders, while lower contamination was found for flying insects. Based on this data scientists calculated exposure scenarios for different bat species, each with different feeding habits, and found that those which fed off insects from the leaves of fruit trees to be most affected. Researchers indicated that current […]

(Beyond Pesticides, June 6, 2011) A broad coalition of conservation, organic-agriculture, anti-pesticide and food-safety groups, including Beyond Pesticides, are calling on Congress to stop the spread of the bat-killing disease which has wiped out more than one million bats, threatening six different species. The letter, sent June 1, 2011, urges Congress to appropriate funds for research and management of white-nose syndrome. Groups are also asking Senators to support the Wildlife Disease Emergency Act, a bill introduced this session by Sen. Frank Lautenberg (D-N.J.), to provide a framework and funding mechanism for effectively addressing wildlife disease crises like white-nose syndrome. Insect-eating bats play an important economic role in agriculture and timber production. A study published earlier this year in the journal Science found that the value of bats’ pest-control services to agricultural operations in the United States ranges from $3.7 billion to $53 billion per year. “White-nose syndrome is a wildlife crisis of unprecedented proportions,” said Mollie Matteson, a conservation advocate with the Center for Biological Diversity, which spearheaded the letter. “Left unchecked, the loss of bats is likely to have cascading effects on both the human and natural worlds for generations to come.” Since 2006, the newly emergent white-nose syndrome […]