Figure 1

Honeybee brood area investigated by medical CT-scan and manual uncapping. Panel a, frontal picture of both left and right side of the brood comb. Panel b, pupal development across five sections of the brood comb assessed by the two CT scans. The five coupled images of the coronal plane of the comb show the honeybee larvae on Day 10 on the left (Ln) and right (Rn) side of the comb and the corresponding developed pupae on Day 17. Panel c, frontal picture of both left and right side of the uncapped brood comb after manual inspection.