>>        While we are discussing swarm control in all it's facets nobody has
>>mentioned what I consider to be the easiest check. On the hive examination
>>'look for eggs' a hive will not swarm leaving open brood.
>>        So.. subject to timing ie. how old the open brood or eggs are helps
>>to determine if and when that hive will swarm.
>>        If you don't find eggs, then you're probably too late. In that case,
>>make a false swarm and split, unless of course you want to give your bees to
>>a neighbour!!
 
        Is is the presence of the eggs or the fact that the queen is still
laying? If if is the egss then as a stop gap measure could you place o
frame for another hive with eggs in order to delay things a bit?