Hello
  A few weeks back I was asking why my hive was excluding drones. I have
a possible answer.
The hive was a package purchased this April and installed on drawn comb.
I continuously fed the hive sugar syrup and they were consuming it.
 However I neglected to feed the hive any type of pollen substitute or
extender. This combined with the condition of a package after four weeks
of being installed could have caused a pollen shortage in the hive.
Considering the new workers would have just been emerging.
  I remember reading, but can't locate where, how a colonies reaction to
drones is related to pollen availability. Correct me if I remembered
wrong.
  This scenario could cause a colony to exclude drones.

Thomas Martin
Shippensburg, Pa

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