Figure 1. AChE relative quantity in bumble bee heads as obtained from RealTime qPCR analyses (n = 32 for control and n = 52 for exposed) for both years combined.

Control treatment corresponds to bumble bees whose colony is at least three kilometers distant from a field planted with neonicotinoid-treated seeds. Exposed treatment corresponds to bumble bees from a colony located within 500 meters of a field planted with neonicotinoid-treated seeds.