> Presumably this would also work by lifting a super of brood right to the
> top of a tiered hive -

If you take the brood to the top tier and there is no pheromone getting to
those bees at the top, I would imagine it would be an emergency response and
not a supercedure response.  In a supercedure response it would be to
pheromone failing over time, not being cut off in one go.  I have seen bees
making queen cells when brood is moved into the top super but it seemed from
numbers more like an emergency response.  I have found that for supercedure
they build only a couple but build many for an emergency response.

Trevor Weatherhead
AUSTRALIA

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