08
Dec
Least-Toxic Chemicals Show Promise for Bed Bug Control, But Non-Toxic Practices Remain the Best Solution
(Beyond Pesticides, December 8, 2017) Less toxic oil-based insecticides are showing promise for the treatment of bed
bugs, according to a study published this month in the Journal of Economic Entomology. The common bed bug has seen a significant resurgence in the U.S., and with the pests found to be resistant to a broad range of modern, toxic insecticides, pest control operators are searching out new, safer ways to manage infestations. “So far there are no reports of resistance to these oils,†said study author Changlu Wang, PhD to Entomology Today. “It is very difficult for insects to develop resistance to them since they are not neurotoxins.â€
A range of 18 essential oils, concentrated liquids containing aromatic compounds derived from plants, were tested for their toxicity to bed bugs that were retrieved from an infested building in Indiana. Paraffin oil, a colorless and odorless mineral oil, as well as three silicone oils, similarly colorless and odorless oils used in various personal care products and medications, were also screened for their toxicity to bed bugs. Scientists observed the bed bugs in a laboratory setting for two weeks before moving to another round of experimentation.
Of the 22 oils tested, paraffin oil and the three silicone oils displayed the greatest bed bug mortality, with blood orange oil and cedarwood oil showing the most toxicity of the essential oils. The authors suspect that the higher rate of bed bug mortality through silicone and paraffin oil exposure is primarily a physical mode of action, where the oils suffocate the insects by entering their tracheal system.
Scientists also compared cedarwood oil, geraniol, and formulated product called EcoRaider, which contained both cedarwood and geraniol in a formulated product. The formulated product EcoRaider resulted in a significantly higher mortality than either of the individual essential oils alone. The study suggests that this may because the pure essential oils are highly volatile and evaporate quickly, while the EcoRaider efficacy is likely a result of additional surfactants in the EcoRaider product.
Silicone oils, paraffin oil, and the formulated product EcoRaider all showed relatively similar toxicity to bed bugs. Given that recent studies have revealed high levels of resistance to widely used neonicotinoid and pyrethroid insecticides, these products may present a viable management option when paired with other techniques. It is important to note that this current experiment was conducted in a laboratory setting, and bed bugs have been shown to display significant variation between toxicity and mortality in the lab and in actual infested buildings and residences. In real world settings, certain bed bug populations may develop stronger resistance mechanisms, and in addition, the bugs have a greater opportunity to avoid insecticide applications. Research in 2012 found that even long-term laboratory populations of bed bugs susceptible to common insecticides were unharmed after given a thin cloth as a cover. Given the bug’s propensity to hide in cracks and crevices of beds, furniture, bags, and other household items, it is evident that spraying any product, even a least toxic one, may not be the best solution for an infestation.
Beyond Pesticides recommends an integrated approach to bed bug management that focuses on cultural practices first and foremost. This includes eliminating clutter where the bugs can hide, encasing and isolating certain furniture, thorough vacuuming, caulking and sealing cracks and crevices around bed frames, floors, walls, baseboard edges, and moldings, and laundering fabrics and clothing. Â Heat and steam treatments are good options that are generally effective at eliminating or drastically reducing most bed bug infestations. Least-toxic chemicals, such as the ones in the present study, but also borates and diatomaceous earth, should be considered as a last resort, and used carefully.
To get a handle on a bed bug infestation in your home or property, don’t reach for a chemical -see Beyond Pesticides article “Got Bed Bugs? Don’t Panic.†as well as the ManageSafe fact sheet on bed bugs. And for more information see the Bed Bug program page or call the office at 202-543-5450 or email at [email protected] for assistance.
All unattributed positions and opinions in this piece are those of Beyond Pesticides.









(Beyond Pesticides, December 7, 2017) European health and environmental groups Global 2000 and Pesticide Action Network (PAN) have announced plans to sue European Union authorities over their assessment of the herbicide glyphosate, the active ingredient in Roundup products produced by the chemical company Monsanto. The groups claim that the German regulatory authority, the Federal Institute for Risk Assessment (BfR), and the European Food Safety Authority (EFSA) used material directly from Monsanto in their report over the safety of glyphosate without making clear that the data came from Monsanto itself.  “Both the BfR and the EFSA were in breach of the requirement obliging them to make an independent, objective and transparent assessment,†the groups said in a statement
(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.
(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.
(Beyond Pesticides, December 4, 2017)Â You told the Arkansas Plant Board to exercise its authority to protect farmers, consumers, and the environment from use of the herbicide dicamba on genetically engineered (GE) soybeans, and the board listened. Now, we need to ask the board to stop the use ofÂ
(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.
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.
industry-fueled attacks on its reputation in the wake of
(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
(Beyond Pesticides, November 27, 2017)Â Congress is working on the 2018 Farm Bill, which will determine how $956 billion of our tax money will be spent over the coming years in shaping our food system. This year, U.S. Representative Earl Blumenauer (D-OR) has introduced a
(Beyond Pesticides, November 22-23, 2017) As we sit with friends and family this Thanksgiving, let us appreciate how our delicious meal got to your table. The turkey, potatoes, stuffing, and cider all originated in fields far from our homes, and those working in those fields deserve our thanks. They deserve our thanks because many of these workers work long hours, under deplorable conditions, and are exposed to pesticides that put their health and that of their families at risk. So, as we enjoy our pumpkin pie, cranberry sauce, and apple crumble, remember all the hardworking farmworkers who have helped to bring our meal to the Thanksgiving table. At the same time, we give thanks for the environment that is so plentiful and nurturing of life, and remember the importance of pollinators and biodiversity in sustaining life.
according to the latest research from New Zealand scientists, 
findings on the risk of three highly toxic organophosphate pesticides to endangered species. The move is widely seen by environmental advocates as influenced by the chemical industry, in particular the
proposed merger of Bayer (BAYN) and Monsanto (MON). The signatures were delivered as two new reports reveal devastating impacts that will be caused by the merger on consumers and farmers, including higher food prices, less innovation, limited seed choices, and escalating dependency of toxic chemical inputs in food production.
Reports. With the organophosphate
Member states voted last week, but failed to approve, continued use even after months of deliberation over the controversial herbicide. Glyphosate (Roundup) is also up for review in the U.S., but many expect the herbicide to be reregistered by the U.S. Environmental Protection Agency (EPA), despite health concerns.
damage, the Arkansas State Plant Board (ASPB) voted earlier this week to prohibit the use of the weedkiller in agriculture during the next growing season. If officially approved by a subcommittee of the state legislature, the new regulations will make dicamba applications between April 16 and October 31, 2018, illegal for Arkansas farmers. The move by the State Plant Board is a huge blow to multinational agrichemical companies Monsanto and BASF, both of which have developed genetically engineered (GE) soybean crops tolerant of dicamba herbicides.
Affairs (VA) Secretary David Shulkin announced last week he intends to delay a decision to expand coverage to new illnesses. Despite a
product, NemaStrike, for nematode or roundworm control (nematicide) have been reporting skin irritation, including rashes that occurred after use. Now the seed giant is pausing a full rollout of the product, while blaming farmers for not using gloves and other protective equipment to handle the treated seeds. This is another blunder from Monsanto and the latest incident highlighting the deficiencies in the U.S. Environmental Protection Agency’s (EPA) pesticide registration process in light of the millions of acres of crop damage from Monsanto products green-lighted by EPA.
retiring board member Francis Thicke, Ph.D., in one of the farmer positions, highlighted ways that big ag has perverted the mission of organic, as originally conceived by organic practitioners, consumers, and environmentalists. Dr. Thicke mentioned “organic†CAFO (concentrated animal feeding operation) dairies with 15,000 cows in a desert feedlot, “organic†chicken CAFOs without outdoor access, fraud in “organic†grain shipments, and, now, “organic†hydroponics. His frustrations mirror those of hundreds who protested against “organic†hydroponics at the Jacksonville, Florida meeting and in written comments.
research and strengthening enforcement of the organic standards:
