Reproduction of parasitic mites in original and new honeybee hosts.

The ectoparasitic mite, , shifted host from the eastern honeybee, , to the western honeybee, . Whereas the original host survives infestations by this parasite, they are lethal to colonies of its new host. Here, we investigated a population of naturally infested by the Korea haplotype that gave rise to the globally invasive mite lineage.