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Study: US pesticide use falls but harms pollinators more

Study: US pesticide use falls but harms pollinators more
Seth Borenstein
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AP2009
FILE - In this Aug. 4, 2009 file photo, a crop duster sprays a field in Alabama. A study published in the journal Science on Thursday, April 1, 2021 finds that farmers in the U.S. are using smaller amounts of better targeted pesticides, but these are harming pollinators, aquatic insects and some plants far more than decades ago. (AP Photo/Dave Martin, File)
American farmers are using smaller amounts of better targeted pesticides, but these are harming pollinators, aquatic insects and some plants far more than decades ago, a new study finds. ....

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Toxic impact of pesticides on bees has doubled, study shows

“Compounds that are particularly toxic to vertebrates have been replaced by compounds with less vertebrate toxicity and that is indeed a success,” said Prof Ralf Schulz, of the University Koblenz and Landau in Germany, who led the research. “But at the same time, pesticides became more specific, and therefore, unfortunately, also more toxic to ‘non-target organisms’, like pollinators and aquatic invertebrates.”
Schulz said: “GM crops were introduced using the argument that they would reduce the dependency of agriculture on chemical pesticides. This is obviously not true if you look at toxicity levels.”
The study, published in the journal Science, used US government data on pesticide use and the level of the toxicity of each chemical to give a measure of the “total applied toxicity”. This enabled changes over time to be assessed. Looking solely at the amount of pesticide applied gives a false picture, the scientists said, because some are several orders ....

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Increasing applied pesticide toxicity threatens plants and insects

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IMAGE: Insects and crustaceans in surface waters are among those exposed to increasing total applied pesticide toxicity.
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Credit: Renja Bereswill
A group of scientists from the University of Koblenz-Landau, Germany, has shown that for plants and insects the applied pesticide toxicity in agriculture has substantially increased between 2004 and 2016. In a paper published in the current issue of
Science, the authors show that this pattern is even relevant in genetically modified (GM) crops that were originally designed to reduce pesticide impacts on the environment.
We have taken a large body of pesticide use data from the US and have expressed changes of amounts applied in agriculture over time as changes in total applied pesticide toxicity, says lead author Ralf Schulz, professor for environmental sciences in Landau. This provides a new view on the potential consequences that pesticide use in agriculture has on biodiversity and ....

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Despite reduced application, common pesticides more deadly to nontarget species over time

Despite a reduction in the total amounts of pesticides used, the toxicity of commonly used pesticides to nontarget species, partially aquatic invertebrates and pollinators, has increased considerably in recent decades, according to a new study analyzing 25 years of pesticide use. ....

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Study: U.S. pesticide use falls but harms pollinators more

American farmers are using smaller amounts of better targeted pesticides, but these are harming pollinators, aquatic insects and some plants far more than decades ago, a new study finds. ....

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