In the last two years they have done sampling in Quebec rivers. In the last two years they have done sampling in watercourses in Ontario. Ontario is about to release its report on that study and map it out, for Ontarians to see where pesticides are persisting beyond the planting zone.
Remember, these aren't sprayed pesticides. They are actually coated on the seed, and once they get into the seed, they grow into the plant; they get into the nectar and the pollen. Controlling the planting will reduce the immediate impact, but still, when insects come along, any insect encountering the pollen or the nectar from the crop can be contaminated.
We lose insects, and we have studies indicating songbird losses, especially of the barn swallow in Ontario. They are disappearing because of the lack of food, because we're killing off all the insects, not just the bad guys.