There has been a lot of debate lately between requeening vs. hive
ventilation etc., for chalkbrood control.  In addition to these procedures,
we've been doing something else that I would like to share.
 
        For chalkbrood and nosema control, and to promote general good health
in our hives, we have been getting more diligent in our brood comb
replacement. We've been replacing 2-4 frames per brood nest every year with
the hope of maintaining a 6 year rotation of comb in the brood chambers.  We
feel that old frames harbor the spores which cause these unhealthy colonies.
 
        When your doing this to 2000+ hives, it requires lots of effort.
Because of this, I'd like to know if there is any scientific validity to my
argument.  Are we wasting our time?  Is anybody else doing this?  I'd
appreciate your comments.
 
        Note:  We have not treated for nosema in 20 years.  Have not noticed
                a problem.  Maybe I should take out the microscope!
 
Thanks,
 
Kevin Christensen