"The presence of entombing is the biggest single predictor of colony loss. It's a defence mechanism that has failed. - Dr. Jeff Pettis, USDA" Source: Pesticide Action Network
Please take a moment to read this vitality important article here: http://www.panna.org/blog/bees-entomb-pesticide-laced-pollen
"Bees are trying to protect themselves from pesticides by "entombing" pesticide-laden pollen. However the deadly three issues of poor nutrition, pathogens and pesticides are causing Bee Colony Collapse! Nopw is the time to plant native plants like Bleeding Hearts, Fringe Cup or Lupine for bee food. Just say no to pesticide use!!!" ~Afia via Facebook