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New Study Reveals Yet More Risks to Bees from Controversial Pesticides

'The evidence of harm is clear,' says environmental advocacy group Friends of the Earth

Three banned types of neonicotinoid pesticides have been found to pose new risks to pollinators. (Photo: Sputnik UK London/flickr/cc)

Pesticides that have been banned in Europe over bee safety concerns may pose an even greater risk to pollinators than previously thought, a new report by the European Union's food safety watchdog reveals.

Neonicotinoids, or neonics, pose high risks to bees when sprayed on plant leaves, according to data by the European Food Safety Authority (EFSA) in its report, published Wednesday—which bolsters previous findings that neonics harm pollinators when used as seed treatments or granules.

The EFSA studied three pesticides in particular—clothianidin, imidacloprid, and thiamethoxam—all of which were banned by the EU in 2013 for a two-year period after scientific reports warned of their dangers. The latest findings, said Greenpeace EU agriculture policy director Marco Contiero, "confirmed what has already been demonstrated by a wealth of scientific evidence: neonicotinoids are a serious threat to bees and to the future of farming."

"The Commission should expand the EU-wide ban to cover all uses of neonicotinoids on all crops," Contiero said. "Viable non-chemical alternatives exist and the EU should encourage farmers to use them.”

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José Tarazona, head of the EFSA's pesticide unit, told the Guardian on Wednesday it is "clear that in some cases there is data suggesting high toxicity and potential risk from these substances."

Neonic use has been linked to dramatic declines in populations of pollinators like bumblebees and honey bees, as well as insects like moths, ladybirds and hoverflies, which help reduce numbers of crop pests. All bee varieties in Europe have been placed on the International Union for the Conservation of Nature's red list (pdf) of threatened species.

"Another day and yet another study shows the high risk to bees from neonicotinoid pesticides," said Paul de Zylva, senior nature campaigner at Friends of the Earth (FOE), in response to the EFSA's study.

"The evidence of harm is clear," de Zylva continued. "Questions need to be asked about how these products were ever approved for use when they were not tested for their effects on different types of bees."

Earlier this year, the United Kingdom lifted its own moratorium on pesticides to allow for some limited use of two kinds of neonics—produced by agrochemical giants Bayer and Syngenta—by farmers growing oilseed rape on roughly 300 square kilometers of land. While the repeal is temporary, giving farmers access to the pesticides for only 120 days, the move sparked outrage among environmental advocates.

Wednesday's findings "underlines why neonics are restricted and why we are challenging the Government's decision to allow use of the banned pesticides in England," de Zylva said.

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