Risk Assessment Flaw Downplays Insecticide's Link to Bee Kills

Risk Assessment Flaw Downplays Insecticide's Link to Bee Kills
http://www.beyondpesticides.org/dailynewsblog/?p=4021

"A new study shows that due to a flaw in standard risk assessments, which consider toxic effects at fixed exposure times, the risks posed by the neonicotinoid pesticides imidacloprid and thiacloprid are likely to be underestimated. The authors believe that minute quantities of imidicloprid may be playing a much larger role in killing bees over extended periods of time than previously thought. The study, "The significance of the Druckrey–Küpfmüller equation for risk assessment—The toxicity of neonicotinoid insecticides to arthropods is reinforced by exposure time," was published online July 23, 2010 in the journal Toxicology."