In the days when bees were kept in skeps, the colonies from which a harvest
was wanted were placed over a sulphur pit which was a pit with buring
sulphur.

In more modern days I suppose that Sulphur dioxide could be made from Sodium
sulphite and a weak acid, or Thorne's in the UK are selling sulphur strips
for fumigating supers for waxmoth and they could be used
Ruary

>  a good method to destroy a hive of bees and not  contaminate the honey 

-- Visit www.honeybeeworld.com/bee-l for rules, FAQ and  other info ---