I've taken down a bee's nest on top of a silo with a can of starting fluid (ether) and a Bic lighter.  The trick is to find one that shoots a good stream rather than a "fog", so you can hose them at a safe distance.
Their demise was as glorious as it was brief...    
 
Sounds like as much fun as hosing down a hornets nest (not the big hive type) around the condo complex with wasp killer. 
Or shooting up a prairie dog town.
[sigh] Fun times, fun times.