Earlier quoted context omitted.
There is testing, science etc for things like pesticides and residue. The burden has been born and carried to a conclusion. Its new claims that the testing was not good enough that have a burden - its easy to call foul or claim hidden problems, then be conveniently too exhausted to do anything about it. Sometimes its not that problems are buried; sometimes they're not real.
Bee death suggests that we are not always researching everything affected by pesticides.
"Scientists studying the disorder believe a combination of factors could be making bees sick, including pesticide exposure, invasive parasitic mites, an inadequate food supply and a new virus that targets bees' immune systems. More research is essential to determine the exact cause of the bees' distress."
Maybe it is pesticides. But stating "maybe" as fact happens all to often and muddies the issue. I would add... bees in this case are domestic bees. Maybe they can be made resistant to said pesticides. Or are all pesticides just bad because they are bad no matter what?