Colony Collapse Disorder (CCD) is a phenomenon in which worker bees from a European honey bee colony abruptly disappear. While such disappearances have occurred throughout the history of apiculture, and were known by various names (disappearing disease, spring dwindle, May disease, autumn collapse, and fall dwindle disease), the syndrome was renamed colony collapse disorder in late 2006 in conjunction with a drastic rise in the number of disappearances of Western honeybee colonies in North America. European beekeepers observed similar phenomena while the Northern Island Assembly received reports of a decline greater than 50%.
Colony collapse is significant economically because many agricultural crops worldwide are pollinated by European honey bees. Shortages of bees in the US have increased the cost to farmers renting them for pollination services by up to 20%.