Large-Scale Study 'Shows Neonic Pesticides Harm Bees'

Long-time Slashdot reader walterbyrd shared an article from the BBC:

The most extensive study to date on neonicotinoid pesticides concludes that they harm both honeybees and wild bees. Researchers said that exposure to the chemicals left honeybee hives less likely to survive over winter, while bumblebees and solitary bees produced fewer queens. The study spanned 2,000 hectares across the UK, Germany and Hungary and was set up to establish the "real-world" impacts of the pesticides... A growing number of studies have found evidence of a link between neonicotinoids and problems for bees... Data from this study has now been submitted to the European Food Standards Agency. EFSA's report on neonicotinoids in 2013 sparked Europe's temporary ban, and it is now preparing another comprehensive assessment to be released in November.
The BBC adds that "Bayer, a major producer of neonicotinoids which part-funded this study, said the findings were inconclusive and that it remained convinced the pesticides were not bad for bees."