An excerpt from 
http://www.producer.com/daily/ontario-field-study-finds-no-link-between-seed-treatments-bee-deaths/

"A comprehensive field study conducted last summer near Guelph, Ont., 
found no link between insecticidal seed treatments and bee health.
The findings are in contrast to European reports suggesting insecticides 
are destroying bee colonies across the globe,
Researchers are still reviewing the Ontario data, but the evidence shows 
that canola treated with clothianidin, a Bayer neonicotinoid, is not a 
threat to bee colony health, said Cynthia Scott-Dupree, a professor in 
the University of Guelph’s School of Environmental Sciences.
“From the data that I’ve seen, I’m not seeing any effect of exposure … 
to canola treated with clothianidin,”..."

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