Bees that make use of a lot of propolis will glue the hive shut for
spring, for summer, and for autumn, too.  Some of my colonies are gooey with
propolis and some are not.  I do not know what evolutionary advantage goes
with lots of propolis; both gooey and non-gooey bees live in my apiaries.
      Do any breeders breed for or against this characteristic?
Tim Sterrett
Westtown, (Southeastern) Pennsylvania, USA
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