Chalkbrood infection levels in colonies in 2008.

The data is from all colonies used in 2008 regardless of use in analyses of foraging rates (n = 5 resin-poor unchallenged colonies; n = 6 each for resin-poor challenged, resin-rich unchallenged and resin-rich challenged colonies). Resin-rich unchallenged colonies positive for CB-infection either had persistent low levels of infection (1 colony) or low-levels of infection at only one time point (2 colonies). Letters indicate significant differences in the total number of mummies based on two-way ANOVA.