Scientist  from the Department of Environmental Health at the Harvard School of Public Health examined the effects of imidacloprid, a neonicotinoid pesticide, on bee colonies as part of a recent review. In the end, the team discovered that the vast majority -- 94 percent -- of hives treated with imidacloprid ended up dying off as a result of what appeared to be CCD, even when very minute levels of the pesticide were added. And a key culprit in this die-off was imidacloprid-tainted High Fructose Corn Syrup, which served as the delivery system for this toxic chemical.