Dung Nguyen wrote:
>
> Using
> sharp knife we can cut off the caps of the drone cells and then beat gently
> the drone combs into the floor or so. All drone brood falls out
> automatically. There is a notice that the drone brood should be kept until
> they reach pupal stage as this will eas the brood removal. This method is
> very very popular in Vietnam where Vietnamese beekeepers apply it combining
> with bee management technique. I hope this info is usefull.
 
With the technique described above, I would be afraid that some mites may escape being thrown from
the comb.  I also think this would be an excessively messy technique, with the drone pupae being
cut by the uncapping knives.  Usually, the recommended procedure here (in the USA) is to put the
capped drone combs in a freezer for 24 hours, then, after thawing, give it back to the colony to
clean out the dead drone brood and dead mites.
 
Ted Fischer
Dexter, Michigan, USA