It's hard to say with CCD being so large and varied. One thing we know is that beehives exposed to certain pesticides [1] are much more likely to collapse. [1]

It's hard to say with CCD being so large and varied. One thing we know is that beehives exposed to certain pesticides [1] are much more likely to collapse. [1] http://www.hsph.harvard.edu/news/press-releases/study-strengthens-link-between-neonicotinoids-and-collapse-of-honey-bee-colonies/ http://www.hsph.harvard.edu/news/press-releases/study-streng...