Things You'll Need
Instructions
Call a local law enforcement agency to inquire about any listed beekeepers in the area who may deal with bee swarms. Bee keepers are more than willing to capture a swarm of bees free of charge, as these bees are desired for starting new honey hives.
Set up a container which is large enough to contain some burning wood and fill it with material to be burnt. Set the container within 100 feet upwind of the swarm mass so the wind blows the smoke directly onto the swarm. Bees don't like smoke and they will generally flee to another "safe" location as they have a built-in forest fire or prairie fire avoidance instinct. If smoking the swarm doesn't send them away, proceed to Step 3.
Wear eye protection, gloves and long-sleeved shirt to avoid getting insecticide on your skin. Get as close to the swarm as possible, remaining upwind so the aerosol insecticide doesn't blow back on you and the mist travels directly onto the swarm mass. Spray the insecticide onto the bees and they will immediately become ill and unable to attack, dying only a minute or two later. This may require more than one can of aerosol, depending upon the swarm size and how close you are willing to get to the swarm so the bees are coated with the insecticide.