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The usual comparison between affected bees and control group bees resulted in the following:
Scientists have discovered ways in which even low doses of widely used pesticides can harm bumblebees and honeybees, interfering with their homing abilities and making them lose their way.
In two studies published in the journal Science on Thursday, British and French researchers looked at bees and neonicotinoid insecticides - a class introduced in the 1990s now among the most commonly used crop pesticides in the world.
In recent years, bee populations have been dropping rapidly, partly due to a phenomenon known as Colony Collapse Disorder. Scientists also fear pesticides are destroying bee populations, but it is not clear how they are causing damage.
And I have recently learned that the #1 cause of *natural* death in bees is...exhaustion!
The treated bees were about two to three times more likely to die while away from their nests, and the researchers said this was probably because the pesticide interfered with the bees' homing systems, so they couldn't find their way home.
Henry said the findings raised important issues about pesticide authorization procedures.
"So far, they (the procedures) mostly require manufacturers to ensure that doses encountered on the field do not kill bees, but they basically ignore the consequences of doses that do not kill them but may cause behavioral difficulties," he said in a statement.