Pesticide-coated seeds — such as neonicotinoids, many of which are highly toxic to both pest and beneficial insects — are increasingly used in the major field crops, but are underreported, in part, because farmers often do not know what pesticides are on their seeds, according to an international team of researchers. The lack of data may complicate efforts to evaluate the value of different pest management strategies, while also protecting human health and the environment.
“We reviewed existing evidence, as well as proprietary and novel government data, on seed treatment usage and found that many farmers either did not know what pesticides were on their seeds or falsely assumed that seed treatments did not include certain pesticides,” said Paul Esker, assistant professor of epidemiology and crop pathology, Penn State. “This lack of knowledge could lead to overuse of pesticides, which could harm the environment and farmers’ health.”
The team analyzed proprietary data from Kynetec, a third-party global marketing and research firm that maintains one of the most comprehensive datasets on pesticide use in the United States, collected from 2004-2014. They found that the use of seed treatments in the U.S. grew over the past decade, particularly in corn and soybean production. In the 2012 to 2014 period, 90% of corn acres and 76% of soybean acres were grown with treated seeds. Of the insecticides applied to seeds, neonicotinoids accounted for roughly 80%.
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Image: Researchers reviewed existing evidence, as well as proprietary and novel government data, on seed treatment usage and found that many farmers either did not know what pesticides were on their seeds or falsely assumed that seed treatments did not include certain pesticides. CREDIT: Alyssa Collins