(Beyond Pesticides, August 11, 2023) Reinforcing earlier findings, a systematic review published in Chemosphere finds the popular herbicide glyphosate and its formulations (glyphosate-based formulations-GBF) exhibit five out of the ten key characteristics (KC) of carcinogens (cancer-causing chemicals). Specifically, glyphosate exhibits strong evidence of genotoxicity, epigenetic alterations (heritable changes in gene expression), oxidative stress, chronic inflammation, endocrine disruption, and disturbs gut microbiota implicated in lymphomagenesis (growth and development of lymphoma). Although organizations like the International Agency for Research on Cancer (IARC) designate glyphosate as a probable human carcinogen, and scientific literature supports the findings on these adverse effects purported by glyphosate, the chemical remains on the U.S. market in various formulations. Glyphosate is the most commonly used active ingredient worldwide, appearing in many herbicide formulas, not just Bayer’s (formerly Monsanto) Roundup®. The use of this chemical has been increasing since the inception of crops genetically modified to tolerate glyphosate over two decades ago. The toxic herbicide readily contaminates the ecosystem with residues pervasive in food and water commodities. In addition to this study, literature proves time and time again that glyphosate has an association with cancer development, as well as human, biotic, and ecosystem harm. Therefore, advocates point to the need for national policies to reassess hazards associated with […]

(Beyond Pesticides, August 10, 2023) The U.S. Environmental Protection Agency’s (EPA) Safer Choice program, a voluntary labeling program, has announced an opportunity for public comment on new areas of work—opening up a public discussion of priorities for identifying less toxic products in the marketplace. EPA describes the labeling program as a part of its Pollution Prevention (P2) program, which, according to the agency, “includes practices that reduce, eliminate, or prevent pollution at its source, such as using safer ingredients in products.” A July 17 Federal Registration Notice, Stakeholder Engagement Opportunity for the Safer Choice and Design for the Environment (DfE) Programs’ Potential Expansion Into New Product Categories, announces a public listening session August 28, and a public comment deadline of September 11, 2023 In the face of existential health, biodiversity, and climate crises, advocates say that the question before EPA is whether strict systemic measures will be adopted to meet the urgency of the crises. This will require the quick phase out of hazardous substances that are contributing to the existential crises (including petrochemical pesticides and fertilizers). While the Safer Choice program can identify practices and products that are not harmful to health, biodiversity, and climate, it is a labeling rather […]

(Beyond Pesticides, August 9, 2023) The U.S. Fish and Wildlife Service (FWS) and U.S. Environmental Protection Agency (EPA) have agreed to assess the harms of applying pesticides in waterways to threatened and endangered wildlife under a legal agreement with the Center for Biological Diversity (CBD). Under the Clean Water Act, a National Pollutant Discharge Elimination Systems (NPDES) permit is needed when pollutants are discharged from a point source (an identifiable source) into the “Waters of the United States” (WOTUS), but federal authorities, in their general permitting process, have long failed to assess effects to threatened and endangered species. According to the terms of the settlement agreement, FWS must complete consultations required under the Endangered Species Act (ESA) to prevent harm to protected species such as bull trout, pallid sturgeon, Oregon spotted frogs, and other threatened aquatic organisms.  The agreement is a step in implementing the 1973 ESA, a law that is saving numerous species from extinction, facilitating the recovery of hundreds more, and enabling the preservation of habitats. The humpback whale, bald eagle, and snail darter are among the species that have been saved thanks to the ESA. For years, Beyond Pesticides has reported on decades of neglecting to fully implement and fund […]

(Beyond Pesticides, August 8, 2023) A study published in PLOS ONE finds a pointed, positive association between chronic kidney disease (CKD) of unknown origins (CKDu) and the use of indoor pesticides. Longer exposure times have an especially detrimental impact on kidney function, even among individuals without underlying diseases like diabetes mellitus and hypertension. The innovation of this study’s purpose highlights the lack of exposure-related studies on kidney health outcomes associated with indoor pesticide use. Although CKD risk increases with age and is associated with other health factors like smoking, heart disease, and diabetes, cases without clear causes are increasingly common, indicating that environmental factors are likely playing a role. Over six million people in the U.S. have kidney disease (i.e., nephritis [kidney inflammation], nephrotic syndrome [improper protein filtration], and nephrosis). Although many studies find an association between exposure to outdoor environmental contaminants like pesticides and CKD, the association between CKDu and indoor pesticides—whose uses are more commonly concentrated in homes— remains unclear. Therefore, studies like this highlight the need for comprehensive information regarding co-occurring exposure patterns and disease prevalence that can have global implications.  The study notes, “Previous research has highlighted the potential harm of pesticides on kidney function, particularly in outdoor uses. Our findings raise […]

(Beyond Pesticides, August 7, 2023) Why is the U.S. Environmental Protection Agency (EPA) allowing the use of pesticides under the “unreasonable adverse effects” to health or the environment standard of the federal pesticide law (Federal Insecticide, Fungicide, and Rodenticide Act [FIFRA]) if the pesticides quickly lose their efficacy? Pest resistance to pesticides is a well-known biological mechanism that becomes problematic when farmers are faced with crop failure and economic loss. It becomes especially threatening when the goal is to manage insects that are a disease vector and when the regulatory process ignores nonchemical management strategies that are efficacious and sustainable. Tell EPA, Governors, and Congress that given the certainty of pesticide resistance, ecologically-based mosquito management must replace a reliance on pesticides. Insect resistance to insecticides has been an issue since the introduction of DDT in the 1940s. Although most countries currently ban DDT use, several currently used insecticides pose the same threat. In fact, resistance is predicted by elementary population genetics, and the speed of its evolution is directly related to the toxicity—that is, strength of selection pressure—and inversely related to the generation length of the organism. When that target organism of the pesticide is a disease vector, like West […]

(Beyond Pesticides, August 4, 2023) The results of an Australian study published in Nature strike a contrast between land and water contamination with pesticide active substances (PAS), highlighting contamination as pesticides are transported through waterways.  The study results on water transport raise serious contamination issues. Only about one percent of the pesticides entering rivers degrade, so that long stretches of waterways and the oceans suffer the direct impact of a pesticide’s active ingredient. The lack of degradation also means that water organisms are being exposed to levels of pesticides exceeding many of the regulatory threshold limits set by governments. Although observation data are highly variable, the authors note that measured concentrations of pesticides in some river reaches of North America, East Asia and Europe exceed one or more regulatory threshold limits “at least once a year.” Further, the pesticides can bioaccumulate at each level of the aquatic food web, which can multiply concentrations by a thousand or more in the highest trophic levels, according to the study authors. The study finds that more than four-fifths of PAS are degraded in the soil, leaving about 10 percent of the original chemical in the soil as residue. Nearly half of that residues […]

It’s hard to escape the impacts of the Barbie movie’s estimated $150 million marketing campaign. You may have noticed advertisements with Burger King’s pink burgers to Airbnb’s Barbie Dreamhouse. Perhaps you have seen viral memes or news stories about the movie’s takedown of the patriarchy or critiques that the movie is overly woke. The pink symbol of Barbie is often followed by a second symbol — plastic. The total mass of plastics on Earth now doubles the total mass of all living mammals, so would Barbie say life is fantastic? Or, might she urge the National Organic Standards Board to ban plastic mulch, an issue on the agenda at the Board’s upcoming October meeting? Plastic products, including those used in chemical-intensive and organic agriculture, and pesticides, play a seemingly necessary role in modern life, encompassing many items beyond straws and grocery bags. However, the convenience of plastic comes at a considerable cost to the planet and human health. The majority of plastics are manufactured using oil and gas, exacerbating climate change. Scientists are becoming increasingly alarmed by the repercussions of microplastics, which are plastic particles smaller than 5 mm in size. In 2022, Philip Landrigan, M.D., et al., announced the […]

(Beyond Pesticides, August 2, 2023) A study published in Pest Management Science finds resistance to insecticides like pyrethroids are challenging attempts to control the mosquito Aedes aegypti (Ae. aegypti), the primary transmitter (vector) of dengue fever. While this study takes place in Bangladesh, resistance to biocides—whether to antibiotics, antimicrobials, or pesticides—is growing globally. Prevention of disease outbreaks is threatened by reliance on chemical biocides to which pathogens and their vectors develop resistance. In fact, resistance is predicted by elementary population genetics, and the speed of its evolution is directly related to the toxicity—that is, the strength of selection pressure—and inversely related to the generation length of the organism. (See PAY articles here and here, a PBS article here.) Insecticide resistance has been an issue since the introduction of DDT (dichlorodiphenyltrichloroethane) in the 1940s. Although most countries currently ban DDT use, the compound is not the only chemical pesticide promoting pest resistance. Several current-use insecticides pose the same threat. Areawide, indiscriminate spraying of insecticides is causing resistance to develop among many pests. Mosquitoes have become increasingly resistant to synthetic pyrethroids, in addition to other classes of insecticides, such as carbamates and organophosphates. Thus, this study demonstrates the need for sustainable and practical strategies […]

(Beyond Pesticides, August 1, 2023) The U.S. Environmental Protection Agency has announced that it is publishing a decade’s worth of pesticide incident data in a searchable database that will be updated on a monthly basis. The Incident Data System (IDS), with poisoning reports generated mostly from chemical manufacturers, states, a national hotline, and poison control centers, offers information on reported pesticide exposures from accidental poisoning of pets, wildlife, and humans, to pesticide drift, noncompliance, and other pesticide incidents that may be associated with product uses in compliance with label instructions. Tracking this incident data is essential to understanding the risks and damages associated with pesticide use.   The bulk of the data on incidents is from consumer reports to chemical manufacturers. Chemical companies are required under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), Section 6(a)(2) to report incidents: “If at any time after the registration of a pesticide the registrant has additional factual information regarding unreasonable adverse effects on the environment of the pesticide, the registrant shall submit such information to the Administrator.” The determine of threshold number of incidents required to be reported as a pattern of “unreasonable adverse effects” is left to the manufacturers to determine. Through […]

(Beyond Pesticides, July 31, 2023) As the national debates on the rights of women to make health decisions about their bodies in the context of abortions, the scientific literature is increasingly documenting involuntary spontaneous abortions and other reproductive effects associated with pesticide exposure—raising critical questions about the ability to control one’s health. Last week, Beyond Pesticides reported on an exploratory study, published in Environment International, that adds to the many studies demonstrating residential prenatal pesticide exposure can result in adverse birth outcomes. Residential exposure to five active pesticide ingredients (Ais) fluroxypyr-meptyl, glufosinate-ammonium, linuron, vinclozolin, and picoxystrobin has adverse effects on gestational age (GA), birth weight (BW), mortality after birth, child’s sex, premature development, low birth weight (LBW), small for gestational age (SGA), and large for gestational age (LGA).  Despite the political furor surrounding medical abortions, the U.S. Environmental Protection Agency (EPA) continues to allow pesticides that cause involuntary spontaneous abortions (miscarriages) and other reproductive effects in exposed women. Tell EPA to ban pesticides that cause involuntary spontaneous abortions (miscarriages) and other reproductive effects. Tell Congress to ensure that EPA does not permit the use of pesticides affecting reproduction.  Most spontaneous abortions occur during the first trimester. The most common cause of miscarriage during the first […]

(Beyond Pesticides, July 28, 2023) A study published in Science of the Total Environment finds glyphosate can adversely impact sensory and cognitive processes in bumblebees (Bombus terrestris). Glyphosate exposure impairs bees’ learning of aversive stimuli like electric shocks paired with specific color discrimination. Additionally, the pesticide reduces attraction to UV (ultraviolet) light, specifically the color blue, and temporarily impacts locomotion and phototaxis (movement in response to light). These impairments to sensory and cognitive processes render foraging difficult for these glyphosate-exposed pollinators and vulnerable to unavoidable predators. The study highlights that symptoms of widespread chemical exposure may reduce foraging efficiency and adversely affect ecosystems, especially those dependent on insect pollinators.  Pollinator decline directly affects the environment, society, and the economy. Without pollinators, many plant species, both agricultural and nonagricultural, will decline or cease to exist as U.S. pollinator declines, particularly among native wild bees, limit crop yields. In turn, the economy will take a hit, since much of the economy (65%) depends upon the strength of the agricultural sector. As the science shows, pesticides are one of the most significant stressors for pollinators. In a world where habitat loss and fragmentation show no sign of abating, scientists have concluded that the globe cannot afford to continue […]

(Beyond Pesticides, July 27, 2023) A study published in the Journal of Economic Entomology calls into question the scientific literature on protecting bees from pesticides. The study analyzes actions taken by pesticide users to reduce the risk of pesticides on nontarget organisms, known as “mitigation measures.” Ultimately, the study finds that there is insufficient evidence to support the effectiveness of bee-protecting mitigation measures.    “Almost all research was centered around protecting honey bees. However, honey bees are a managed species that is not endangered,” Edward Straw, Ph.D., a postdoctoral researcher in the School of Agriculture and Food Science at University College Dublin in Ireland and lead author on the study, says, “When we try to protect bees, we really want to be protecting wild, unmanaged bee species, as these are the species which are in decline.”  The study includes a chart of mitigation methods that have been tested in the scientific literature. The mitigation measures under evaluation include: restricting pesticide application to certain times of day, restricting the application of pesticides during weather events, removing flowering weeds that attract pollinators, applying repellents to deter pollinators, and more. The researchers find that there are few empirical tests on the most widely used […]

(Beyond Pesticides, July 26, 2023) An exploratory study published in Environment International adds to the many studies demonstrating residential prenatal pesticide exposure can result in adverse birth outcomes. Residential exposure to five active pesticide ingredients (Ais) fluroxypyr-meptyl, glufosinate-ammonium, linuron, vinclozolin, and picoxystrobin has adverse effects on gestational age (GA), birth weight (BW), mortality after birth, child’s sex, premature development, low birth weight (LBW), small for gestational age (SGA), and large for gestational age (LGA). Pesticides’ presence in the body has implications for human health, especially during vulnerable life stages like childhood, puberty, pregnancy, and old age. Pesticide exposure during pregnancy is of specific concern as health effects for all life stages can be long-lasting. Birth and reproductive complications are increasingly common among individuals exposed to environmental toxicants like pesticides. The Centers for Disease Control and Prevention (CDC) reports birth defects are the leading cause of infant mortality, with one in every 33 infants born with an abnormality that results in death. Therefore, studies like this can help government and health officials safeguard human health by assessing adverse effects following prevalent chemical exposure.  Using a Dutch birth registry from 2009 to 2013, the researchers selected pregnant mothers over 16 years who were living in non-urban areas (who […]

(Beyond Pesticides, July 25, 2023) How can scientists fight the elimination of national pesticide data? More data! A new report surveys 58 academic institutions, nongovernmental organizations, government officials, and businesses to measure the scientific, educational, and policy use of the United States Geological Survey (USGS) Pesticide National Synthesis Project (PNSP), a database that is getting phased out by the current administration.   According to the report authors, Maggie Douglas, PhD, Bill Freese, Joseph G. Grzywacz, PhD, and Nathan Donley, PhD, the PNSP is the “most comprehensive public description of pesticide use in U.S. agriculture.” Despite its widespread use across the government and 348 citations since 2010, the database has been degraded in recent years, including a shift from monitoring 400 pesticides to 72 pesticides in 2019. Moreover, starting in 2024, estimates of agricultural pesticide use will be released every five years (instead of annually). Advocates believe the loss of PNSP data could further hinder the ability to manage pesticide impacts on humans, agriculture, and the environment. These concerns are outlined in a letter to USGS and the Department of Interior, signed by more than 250 scientists.  Beyond Pesticides extensively tracks USGS data and resulting findings to inform local and state […]

(Beyond Pesticides, July 24, 2023) Sewage sludge, also known as biosolids, is a byproduct of sewage treatment and is used as a source of organic matter for amending soil in nonorganic agriculture and landscaping. EPA has published a list of 726 chemicals found in biosolids in the National Sewage Sludge Surveys. This list does not include the per- and polyfluoroalkyl substances (PFAS), which are emerging contaminants of biosolids. Tell your Governor and local officials to ban the use of biosolids in farms and parks, until there is adequate testing of toxic residues—which does not currently exist. In addition to PFAS (also referred to as “forever chemicals”), persistent toxic pollutants found in biosolids include: inorganic chemicals such as metals and trace elements; organic chemicals such as polychlorinated biphenyls or PCBs, dioxins, pharmaceuticals, and surfactants; and pathogens including bacteria, viruses, and parasites. Regulation of biosolids by the U.S. Environmental Protection Agency (EPA) has been found by the EPA Office of Inspector General (OIG), in its report EPA Unable to Assess the Impact of Hundreds of Unregulated Pollutants in Land-Applied Biosolids on Human Health and the Environment, to be inadequate. Lacking sufficient oversight at the federal level, action to protect health and the environment falls […]

(Beyond Pesticides, July 21, 2023) A comprehensive and scathing report, “Neonicotinoid insecticides: Failing to come to grips with a predictable environmental disaster,” issued by American Bird Conservancy (ABC)in June, lays out the dire consequences of neonicotinoid (neonic) pesticides’ continued use. The report is an update of an earlier review from 2013, which warned of the risks to birds, stating starkly: “A single corn kernel coated with a neonicotinoid can kill a songbird. Even a tiny grain of wheat or canola treated with the oldest neonicotinoid, imidacloprid, can poison a bird. As little as 1/10th of a corn seed per day during egg-laying season is all that is needed to affect reproduction with any of the neonicotinoids registered to date.” The story of neonic harm is one that has been repeated for generations with different pesticides. Pesticide manufacturers claim every new generation of their products is safer and more environmentally benign than the previous one. This is seldom true. There is ample evidence that pesticides pose threats to nearly every class of organism on Earth, from earthworms to elephants. The neonicotinoids, introduced in the early 1990s, have been marketed as safe for vertebrates, non-bioaccumulative, and, because of their flexible application methods […]

(Beyond Pesticides, July 20, 2023) Despite evidence of toxicity to pets from Seresto pet collars (manufactured with the neurotoxic insecticide flumethrin, as well as the notorious neonicotinoid imidacloprid), the U.S. Environmental Protection Agency’s (EPA) has announced that the popular flea and tick collars will remain on the market, but with new mitigation measures. However, advocates say that these measures will do little to protect people and pets from chemical exposure using these collars. The agency will require Elanco — the manufacturer of Seresto — to conduct enhanced reporting for various factors, including adverse symptoms, veterinary community outreach, and warnings on the product’s label. Seresto, developed by Bayer and sold by Elanco, has been linked to nearly 1,700 pet deaths, injuries to tens of thousands of animals, and harm to hundreds of people. There are nontoxic ways to protect pets from fleas and other pests while protecting human family members. Children Ignored by the Agency EPA has a history of ignoring the exposure patterns to children who come into close contact with pets and their flea collars and the potential adverse health threats, opting for warnings instead of regulatory action. In 2017, EPA issued a warning for tetrachlorvinphos (TCVP) flea collars that advised: “not […]

(Beyond Pesticides, July 19, 2023) A study in Environment International (August issue) by the United States Geological Survey (USGS) finds that almost half of U.S. tap water is contaminated with PFAS chemicals, with measured concentrations in both private wells and public water sources. Authors of the study “estimate that at least one PFAS could be detected in about 45% of U.S. drinking-water samples.” Although there are more than 12,000 different types of PFAS, only 32 are detectable by USGS lab tests, so 45% is likely a low estimate.  Per- and polyfluoroalkyl substances (PFAS) are a group of chemicals found in a variety of common household products such as nonstick pans and stain resistant carpeting, as well as pesticides and biosolids used as fertilizer. Long-chain PFAS, such as PFOA and PFOS, are more widely known because of their high toxicity and controversial use in the past. Today, long-chain PFAS are often replaced with short-chain PFAS, as the latter are not as bioaccumulative; however, short-chained PFAS also pose a significant threat because they remain highly persistent in the environment. Past Beyond Pesticides’ articles have described the prevalence of PFAS in products as well as their negative health consequences, including cancer, decreased fertility, […]

(Beyond Pesticides, July 18, 2023) The Global Environment Facility (GEF) Council, the governing body for the world’s largest source of multilateral funding for biodiversity loss and climate change, has authorized $34 million USD to support the new high seas treaty agreement announced on March 4. The move marks a significant step toward safeguarding the delicate ecosystems of the world’s oceans and promoting sustainable practices on a global scale. The oceans suffer from severe pollution caused by various substances, including pesticides, agricultural runoff, industrial and petrochemical waste, and synthetic chemicals found in plastics. These pollutants pose a significant threat to human health. The ecological consequences of ocean pollution have long been highlighted by Beyond Pesticides. The March draft agreement was approved by 193 countries under the United Nations Convention on the Law of the Sea on the conservation and sustainable use of marine biological diversity of areas beyond national jurisdiction (BBNJ). Then in June, the BBNJ agreement was adopted by consensus at the United Nations meeting in New York. The agreement will be open for countries to sign on September 20, 2023, after the Sustainable Development Goal Summit. In order for the treaty to be entered into force, sixty countries must […]

(Beyond Pesticides, July 17, 2023) Students of environmental policy quickly learn that the most meaningful change to protect health and the environment begins with action in local communities. The challenge now is to preserve the rights of communities under federal law to restrict pesticides and advance local protections through the adoption of eco- and health-friendly, organic land management practices. As is known from history, with the leadership of local communities, the states and the federal government will follow. History of Action in Communities and States Major actions on the banning or restricting of specific pesticides over the last seven decades—from DDT (in Michigan and Wisconsin), 2,4,5-T [1/2 of Agent Orange] (in Oregon [read A Bitter Fog]), to chlordane (New York)—began with calls from the grassroots about dying wildlife to elevated cancer and miscarriage rates and other diseases. But, these chemical incidents (which continue to today with similar campaigns, but different chemical names like glyphosate, imidacloprid (neonicotinoids), and others), launched broader community-based efforts to curtail overall pesticide use—stop drift, runoff and other nontarget exposure—and require organic-compatible practices. Tracing the history—from Mendocino County, CA to Lincoln County, OR, to Casey, WI (upheld by the U.S. Supreme Court), to Montgomery County, MD, to […]

(Beyond Pesticides, June 14, 2023) The exoskeleton of the black soldier fly (BSF; Hermetica illucens) has the potential to be an effective organic fertilizer. A study in the journal Agriculture, Ecosystems & Environment highlights the positive impacts on plant size, flower count, seed production, appeal to pollinators, and resilience to herbivory that the fly’s molted exoskeleton (or exuviae) can have when used as a soil supplement. The use of insect exuviae as an organic alternative to harmful synthetic fertilizers is an important step toward an environment free from chemical contaminants, and BSF are uniquely equipped to contribute to a regenerative organic agricultural system. The study set out to determine the impacts of BSF exuviae on plant growth, resilience to herbivory, and pollination. The scientists divided black mustard plants into four different treatment groups: 1) grown in soil amended with BSF powdered exuviae; 2) control group planted in chemically-treated (conventional) soil; 3) grown in amended soil and subjected to increased herbivory from caterpillars (Pieris brassicae) and aphids (Brevicoryne brassicae); and 4) planted in conventional soil and subjected to increased pest exposure. Scientists measured plant growth, flowering status, seed production, herbivore abundance, and pollinator activity. After three weeks, the supplemented soil grew […]

(Beyond Pesticides, July 13, 2023) A study published in Environmental Science and Pollution Research finds exposure to p-Dichlorobenzene (p-DCB), a chlorophenol compound with uses as an insecticide, disinfectant, repellent, fumigant, fungicide, and deodorizer, can increase the risk of common endocrine (hormone)-mediated reproductive cancers (i.e., breast, uterine, and ovarian) in women. P-DCB or paradichlorobenzene has carcinogenic (cancer-causing) properties and the chemical has been banned in the European Union (EU) since 2005 for air fresheners and 2008 for mothballs. Being a chlorinated aromatic hydrocarbon (with benzene) compound (chlorobenzene), in addition to its cancer-causing properties, p-DCB can cause acute illnesses like headaches, numbness, sleepiness, nausea and vomiting and chronic effects like nervous system disorders leading to depression, and impact on the brain, birth outcomes, reproductive system, liver, and kidneys. Pesticides have a long history associated with endocrine-disrupting properties that induce various molecular changes, prompting disease development. Adding to the science, a similar review published in Environmental Exposure, Biomonitoring, and Exposure Assessment highlights how specific estrogen-mimicking pesticides increase the risk of disease, particularly hormone-related cancers among women (e.g., breast, ovarian, and endometrial cancer) and men (i.e., testicular, prostate cancer).PDCB, also known as para-dichlorobenzene, contains the carcinogen benzene and is chlorine-based (a chlorinated aromatic hydrocarbon compound), which in December 2019 […]

(Beyond Pesticides, July 12, 2023) A study by University of Delaware entomologist Thabu Mugala and colleagues finds that modifications to their farming methods can reduce slug damage when those changes also encourage natural slug predators, allowing farmers to avoid the endless cycle of pesticide dependency, pest resistance, genetically engineered crops, and synthetic fertilizers. With insects as the target for tens of millions of pounds of agricultural use, growers of the highest-production crops in the U.S., corn and soybeans, continue to find slugs to be a serious problem. Corn and soybean growers who have adopted no-till or conservation tillage and cover crops often think these practices worsen the problem by increasing moisture and decaying plant material in fields, which slugs love. But the cause-and-effect picture is more nuanced and requires strategies that nurture ecological balance. Slugs are the most damaging non-arthropod pest in no-till corn production in the U.S., and truly effective chemical deterrents do not exist at agricultural scale, as Beyond Pesticides noted here, although biological methods may be on the horizon, such as a parasitic nematode already used in Europe that shows promise. The most voracious natural slug hunters are ground beetles, but harvestmen (daddy longlegs), and wolf spiders […]