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By Judy Wu-Smart
It has been approximately five years since I began finding total losses of the honey bee colonies located at a University research and extension center near Mead, Nebraska, where I keep bees and work as a scientist studying pesticides and bee decline.
And it’s been more than two years since I began to suspect something terribly wrong was happening around the university research station.
Every year, honey bee colonies placed in multiple locations across the 9,600-acre research center were dying.
After ruling out on-farm practices and common bee stressors such as a lack of food, parasites, and diseases, my lab’s investigations into the unexplained bee losses began to uncover widespread pollution originating from an ethanol facility located just a few miles upstream of my apiaries.
This ethanol facility claimed to process 98% of all outdated pesticide-treated crop seeds in North America for the production of fuel ethanol and soil conditioners from the byproducts.
Unfortunately, this practice also produced stockpiles of waste containing excessively concentrated levels of toxic chemicals known as “systemic pesticides,” including neonicotinoid insecticides, (neonics), and several fungicides.
The chemical companies that had been shipping expired, chemically treated seed for disposal through the ethanol production process are now working to assist in cleaning up the stockpiles of contaminated waste and leaking waste lagoons, which I applaud.
But the clean-up efforts do not address the reality that systemic pesticides can readily move from contaminated soil and water into nearby plants and their leaves, nectar and pollen-movement which potentially exposes pollinators and other wildlife to these chemicals.
This is worrisome because bees and other pollinating insects provide critical pollination services to more than 90 different crops.
Importantly, they are also biological indicators of their surrounding environments (think “canary in the coal mine”).
The inability of honey bee colonies to survive signals a much broader concern for the health and safety of people, domestic animals, wildlife and crops.
I am part of a team of Nebraska researchers now broadly examining the environmental, ecological and human health impacts of the contamination created by the ethanol plant, at local and state levels.
This research includes studying the long-term impacts of persistent exposure to mixtures of chemicals, particularly for pollinators and other beneficial insects, as well as birds, amphibians, and mammals that rely heavily on insects in the food web.
Data collected to clarify the environmental fate of systemic pesticides originating from waste piles and lagoons are critical to informing policy decisions.
Funding for the research team, however, is limited due to the complexity of the issues, high costs for pesticide testing and research breadth needed to appropriately evaluate impacts.
I have been studying the impact of pesticides, including neonics, on bees for over a decade, and systemic neonicotinoids have been scrutinized worldwide as harmful chemicals to pollinators since their introduction in the 1990s.
Yet, surprisingly, there is no division at the U.S. Environmental Protection Agency to specifically address concerns that systemic pesticides can unintentionally move into plants, including those consumed by humans, livestock and pets, nor a division regulating or monitoring what happens to the excess, expired chemically treated seeds.
The federal exemption from pesticide regulations on treated articles, under which pesticide-coated seeds fall, has led local regulators to rise to the challenge themselves, resulting in piecemeal state responses to address concerns over neonics, including proper disposal options for treated seeds now that the facility described above has been shut down.
As a scientist with research experience in this area, I have provided testimony for several new “extended responsibility bills” that seek accountability for hazardous products from cradle to grave.
This also includes legislative efforts to re-evaluate the utility of neonics to reduce their use in systems that see the little-to-no added value and conserve their use in systems that truly rely on them for pest control.
A need to work together
Sadly, many of these legislative efforts are viewed as anti-business and face strong resistance as a result.
The anti-business opposition view shouldn’t just shut down conversations meant to develop solutions that address real concerns. To what benefit?
Ultimately, this story isn’t just about many dead and dying bees, nor is it about any particular chemical.
This story is about the over-use and environmental overloading of chemicals and the direct and indirect effects of exposure on all of us.
Chemicals are used in agricultural, industrial and urban landscapes, increasing the complexity of toxic mixtures surrounding us.
Animals challenged with chronic and persistent pesticide exposure often exhibit compromised health that leads to higher rates of disease outbreaks, negative impacts on growth, developmental and cognitive issues, and accelerated development of chemical resistance in pest populations, including disease vectors such as mosquitoes and ticks.
Although this incident occurring in Nebraska may be viewed as an isolated incident, chemical overloading is a potential problem for any state and is for many.
To protect our children, farmers, businesses, and livelihoods we should work collectively to reduce and eliminate pesticide formulations and products that cause more harm than good.
This is not an attack on industry or those that rely on these products, but rather a recognition that we all have roles to play and must be more responsive to concerns over pesticides.
We need innovative solutions to reduce chemical dependency, uses and exposures if we all want to thrive.
Originally published by The New Lede.
Judy Wu-Smart is an associate professor of entomology at the University of Nebraska-Lincoln. She has studied the effects of pesticides on bees for more than a decade.