Thank you, Red. It is interesting, but I suspect that these studies may be targeting pesticides with an agenda. We use some of the brand names listed on our crops, as do many other farmers, and there has been colony collapses anywhere in NE Louisiana. I can’t speak for other areas, but I think we would have heard about it if keepers were losing hives. I read several bee fora, and stay in touch with the state beekeepers’ organizations.
The amounts of pesticides used are way above anything found in the nectar of the plants involved. They are fed at different concentrations using sugar syrup since they cannot get the greater concentrations any other way.
When bees are in fields, such as canola, which is treated with the pesticides involved, they show no problems. So your observations, that you have not seen the problem described, is accurate.
There is a concerted attack against these pesticides and bees are being used as the tool to get them banned.