Water contamination with clothianidin on canola/oilseed rape fields in Saskatchewan

Environment Canada had conducted a water study in Saskatchewan on canola/ oilseed rape fields both last year and this year. They found Clothianidin in a large number of agricultural sites where Canola (oilseed rape) had been planted in 2011. The concentrations of residual Clothianidin in puddles and ditches were almost one thousand times the LD50 required to kill bees.Clothianidin concentrations ranged from 5.1 to 2280 ng/L. The average Clothianidin contamination of water was 162.9 ng/L. The scientifc presentation is attached.