Mick & all,
 
I lost an extremely large swarm early on the season from not using a
queen excluder between the deep & the bottom board.  NEVER again!  I'll
always use an excluder on NEW swarms to keep the queen from taking
flight - though I'll remove it following 6-10 days as the queen should
have a 'stake' in here new home by then by laying brood.
 
Matthew in Colorado
 
Bozard, Charles Emmett (Mick) wrote:
 
> HELLO FELLOW BEEKEEPS,
> WHAT WOULD HAPPEN IF WERE TO PUT A QUEEN EXCLUDER UNDER THE BROOD BOX
> AT
> THE ENTRANCE,  PREVENTING THE QUEEN EVER TO LEAVE. ALSO