Re: Does Constant Robbing Demoralise Colonies
Doesn't really seem to matter to the bees. They can respond a bit defensively, and moreso, if the flow has slowed, just prior to harvest. But, depending on the bees, they may be defensive anytime they are disturbed. Some like to harvest continuously, throughout the season, after every flow period (they get the unique honey from each major floral source), others only harvest once per season, mixing all the different honey's together.
I would say, it depends on how the flows are in your location and what your goals are - the bees recover from a harvest, very quickly. As quickly as any other inspection, unless there is presently a dearth, and not enough honey is left them, for survival to the next flow.
It is however, prudent to place as many supers on a hive, during a flow, as the bees can occupy, since the more comb space the bees will have to use as they ripen nectar into honey, the more honey they can produce from a flow.