Steve Creasy writes
<<<<  If honey supers are separated from brood boxes by a
queen excluder 100% of the time, and no brood is ever raised in them, the
chance of getting waxmoth in them is nil since there is nothing in them
of  value to eat.>>>>
Not quite true but near enough.  All larvae require protein for development.
There is no protein in pure beeswax.  Sometimes an ill-educated waxmoth will
lay her eggs in a comb of pure wax.  The eggs hatch and the larvae die early
and little damage is done.  I gave up using PDB in super storage many years
ago as an unnecessary chore and expense (the bees do not like it also).  My
supers, wax only and never used for brood, require no special storage
treatment.  On a commercial basis it may not be practicable to keep brood
and super combs from being intermixed, especially with a standard
Langstroth. The hobbyist might consider using a single deep broodchamber,
nine or ten Dadant depth combs, a queen excluder and shallow super combs.
This is standard practice in my part of the world.  A standard Langstroth
brood chamber can easily be converted  by the addition of a two and one
eighth inch eke.
A brood comb containing cocoons and usually some pollen quickly falls prey
to waxmoth.  Leave it exposed for just a day and a moth will find it.  If I
have surplus brood combs at the end of the season they go straight into
plastic bags and into a freezer for two days. then remain sealed until needed.
_________________________________________________________________
Sid Pullinger                    Email :  [log in to unmask]    or
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England