confirms that honey bees
are at great risk when simultaneously exposed to parasites and pesticides.
Two pesticides of concern, fipronil and thiacloprid (a neonicotinoid), operate in combination with a common pathogen to dramatically increase bee death. And they do so at very low, sub-lethal levels.
It is estimated that seven in ten U.S. bee hives are infected with the parasite Nosema ceranae. A study released in June found that 47% of infected bees die. However, when also exposed to low levels of pesticides, the mortality rate jumps to 71%.
On their own, both parasites and