Hygienic behavior of honeybee workers in the Low (L), High (H), and Low/High (L/H) mixed groups.

<p>(A) Schematic representation of the experimental setup of the cages. Newly emerged L and H worker bees from the two L (L1 and L2) and two H (H1 and H2) genetic hygienic behavior sources were used to establish mixed L/H, pure L and pure H bee cages. Each cage consisted of ∼500 individually marked bees. L bees are shown in blue, and H bees are shown in red. (B) An example of a worker (tag no. 89) that engaged in uncapping behavior. The hygienic behavior of ∼12-day-old workers was monitored for 12 hours in a brood comb that contained ∼33 pin-killed pupae and control brood cells.