Queen Bees Compromise Egg Production to Endure Pesticide Exposure, Threatening Colony Stability

A photograph taken on April 19, 2010, shows bees at an apiary near the Bureij refugee camp in the central Gaza Strip. Amidst the worst recorded honeybee colony losses in the U.S., with over half of managed colonies wiped out in a single year, a new study from UC Davis published in Current Biology reveals a biological mechanism that may explain why some colonies initially recover from pesticide exposure but later collapse. The research highlights a process termed maternal offloading, where a queen bee concentrates toxins into her developing eggs, significantly exceeding the levels found in her own body.