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Neonicotinoids linked with Canada bee deaths

The planting of maize seed treated with the neonicotinoid insecticides, clothianidin and/or thiamethoxam, contributed to the majority of bee deaths that occurred in maize-growing regions of Ontario and Quebec in spring 2012, concludes the Pest Management Regulatory Agency (PMRA). The likely route of exposure was insecticide-contaminated dust generated during maize seed planting, the PMRA points out. However, the unusual weather conditions were likely to have been a contributing factor, it adds.


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