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Bees facing a poisoned spring http://apocadocs.com/s.pl?1295531381
A new generation of pesticides is making honeybees far more susceptible to disease, even at tiny doses, and may be a clue to the mysterious colony collapse disorder that has devastated bees across the world, the US government's leading bee researcher has found. Yet the discovery has remained unpublished for nearly two years since it was made by the US Department of Agriculture's Bee Research Laboratory.... Bayer, the German chemicals giant which developed the insecticides and makes most of them, insists that they are safe for bees if used properly, but they have already been widely linked to bee mortality. The US findings raise questions about the substance used in the bee lab's experiment, imidacloprid, which was Bayer's top-selling insecticide in 2009, earning the company £510m. The worry is that neonicotinoids, which are neurotoxins - that is, they attack the central nervous system - are also "systemic", meaning they are taken up into every part of the plant which is treated with them, including the pollen and nectar. This means that bees and other pollinating insects can absorb them and carry them back to their hives or nests - even if they are not the insecticide's target species.... The American study, led by Dr Jeffrey Pettis, research leader at the US government bee lab in Beltsville, Maryland, has demonstrated that the insects' vulnerability to infection is increased by the presence of imidacloprid, even at the most microscopic doses. Dr Pettis and his team found that increased disease infection happened even when the levels of the insecticide were so tiny that they could not subsequently be detected in the bees, although the researchers knew that they had been dosed with it.
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