This is a small study. There is a bit of "begging the question" in its design and implementation. The study design is not indicative of any plausible mechanism which would be analogous to what is happening in the wild to cause CCD (colony collapse disorder). There is no causal link established by this study to connect the pesticides used in the study with CCD. The researcher, given his previous research, seems to be ideologically biased.
Plus Australia, which uses the exact same kind of pesticides, has zero colony collapse disorder. There are also areas with colony collapse disorder which do not use those pesticides.
In other words, the neonicotinoid hypothesis is pretty damned thin, and likely falsified by other data. And this research is receiving negative review for all these reasons.
The prominent hypothesis is still a parasite or an infection of some sort. Whether it is amplified by pesticides or not has not been determined, and at any rate this study did not test that possibility.
Read about it here: http://www.iflscience.com/plants-and-animals/study-claims-colony-collapse-disorder-caused-insecticides
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