Fewer pesticides in the fields, yet the risks remain

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How to limit the impact of pesticides on the environment? One obvious approach is to reduce the amount of product applied to the fields. Alas, such a reduction does not necessarily guarantee a reduction in damage to ecosystems, according to a study published in the journal Science April 2. It shows that in the United States, the toxicity of pesticides has increased for certain groups of species over the past 25 years.

The authors of the study, researchers from the University of Koblenz-Landau, analyzed the evolution of the quantities of pesticides used in the United States between 1992 and 2016. They also evaluated the variations over time in the toxicity of some 382 of these substances for eight different groups of organisms (fish, aquatic insects, pollinators, plants, etc.).

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