Top US Bee Experts: Nicotine Pesticides Worsen Bee Diseases

This is a really big deal:

A team of the top United States honeybee experts at the U.S. Department of Agriculture's Beltsville, Maryland, laboratory near Washington DC has published a damning report linking tiny sub-lethal concentrations of one nicotine pesticide, imidacloprid, with an increase in another common gut disease, Nosema.

Although many other studies before this suggested similar findings, the US government has been far behind - this is therefore a breakthrough. It also acknowledges some of the major work done by French researchers: until now, the groundbreaking French research was largely ignored by official US government agencies. Look for breakthroughs because of this work.

The original article linked above was released for public/open access (thanks Springer Publishing for making this open access!!). It is a top-downloaded article at this time on Springer's website.

Abstract of Original Article:
"Global pollinator declines have been attributed to habitat destruction, pesticide use, and climate change or some combination of these factors, and managed honey bees, Apis mellifera, are part of worldwide pollinator declines. Here we exposed honey bee colonies during three brood generations to sub-lethal doses of a widely used pesticide, imidacloprid, and then subsequently challenged newly emerged bees with the gut parasite, Nosema spp. The pesticide dosages used were below levels demonstrated to cause effects on longevity or foraging in adult honey bees. Nosema infections increased significantly in the bees from pesticide-treated hives when compared to bees from control hives demonstrating an indirect effect of pesticides on pathogen growth in honey bees. We clearly demonstrate an increase in pathogen growth within individual bees reared in colonies exposed to one of the most widely used pesticides worldwide, imidacloprid, at below levels considered harmful to bees. The finding that individual bees with undetectable levels of the target pesticide, after being reared in a sub-lethal pesticide environment within the colony, had higher Nosema is significant. Interactions be- tween pesticides and pathogens could be a major contributor to increased mortality of honey bee colonies, including colony collapse disorder, and other pollinator declines worldwide."