Fig 5. Mean (±SE) colony size and percentage of capped brood cells in the 2010 colonies exposed to untreated or imidacloprid-spiked diet patties for 12 weeks (May 27 to August 19).

ANOVA results for bees (dose: F _{(3, 23.7)} = 0.04, p = 0.988; date: F _{(7, 165)} = 7.69, p < 0.001; interaction: F _{(21, 165)} = 3.89, p = 0.608) and brood (dose: F _{(3, 18.3)} = 0.34, p = 0.800; date: F _{(7, 146)} = 8.64, p < 0.001; interaction: F _{(21, 146)} = 1.16, p = 0.296).