No Scientific Cause for CCD Has Been Proven
Colony Collapse Disorder (CCD) is a serious problem threatening the health of honey bees and the economic stability of commercial beekeeping and pollination operations in the United States. CCD is the phenomenon that occurs when worker bees in a colony disappear and leave behind a queen, plenty of honey and a few nurse bees to care for the remaining immature bees and the queen. No piles of dead honey bee bodies are found in or around a hive affected by CCD. A hive cannot sustain itself without worker bees and eventually dies.
Despite a number of claims in the general and scientific media, a cause or causes of CCD have not been identified by researchers. The Agricultural Research Service (ARS), USDA's internal research agency, is leading several efforts into possible CCD causes and striving to enhance overall honey bee health by improving bee management practices, as well as studying honey bee diseases and parasites and how best to control them. In addition, a number of other federal agencies and state departments of agriculture, universities and private companies are conducting studies to seek the cause or causes of CCD.