Chensheng Lu was in his element last month at a speech before a green group at Harvard Law School. The School of Public Health professor was lecturing on his favorite topic--his only subject these days, as it has become his obsession: why he believes bees around the world are in crisis.
Lu is convinced, unequivocally, that a popular pesticide hailed by many scientists as a less toxic replacement for farm chemicals proven to be far more dangerous to humans and the environment is actually a killer in its own right. "We demonstrated that neonicotinoids are highly likely to be responsible for triggering Colony Collapse Disorder in bee hives," claimed Lu. The future of our food system and public health, he said, hangs in the balance. Read more
Though no one cause has been identified for CCD, poor diets, exposure to pesticides and parasites are all on the list of potential causes. Now, the University of London says, pressure on young bees could also be a factor. Read more
The first comprehensive survey of CCD-affected bee populations
that suggests CCD involves an interaction between pathogens and other stress factors. We present evidence that this condition is contagious or the result of exposure to a common risk factor. Potentially important areas for future hypothesis-driven research, including the possible legacy effect of mite parasitism and the role of honey bee resistance to pesticides, are highlighted.