...so says Galen P. Dively, a professor at the University of Maryland who specializes in integrated pest management.

Colony Collapse Disorder (CCD) has caused much concern among beekeepers nationwide and it is not clear to date what is causing the die-off.

Genetically modified crops, specifically Bt corn, have been suggested as a potential cause of CCD. While this possibility has not been ruled out, the weight of evidence based on a multitude of studies argues strongly that the current use of Bt corn is not associated with CCD.

The argument for GM as the root cause was always iffy (albeit stronger than the "cell phone tower" hypothesis). My money's on fungus.