13 octubre 2015
Throughout the northern hemisphere, beekeepers have struggled to maintain adequate numbers of honey bee colonies for crop pollination and honey production due to dramatic increases in colony deaths each year. Recent surveys of beekeepers suggest that poor queen health is an important reason for these losses, but why queen health is now being affected is not understood.
http://www.sciencedaily.com/releases/2015/10/151013103118.htm
