First the honeybees, then the larvae will move on to bigger and nastier prey, and before you know it, we will have a Type III infestation of animal zombies, and soon, human ones....
Could the flies carry the dreaded Solanum virus, and if so, should we begin prepping for the zombie hordes?
On a serious note, this reminds me of the fungus in the rain forest that turns ants into the walking dead. It carries far more unfortunate implications, in that the bees don't know enough to get the living dead corpses far and away from the colony, like the ants do.