Originally posted by jonnin:

if you handload, you can make 38s or similar into little shotgun shells using something like rice as the pellets to get rid of bugs. Its exceptionally good at capping those stupid bees that drill into wood to nest. Most cities frown upon this, so check your local laws before playing.

With our local (and normal) number of swarms the preferred method involves a flamethrower and/or fuel air bomb. City ordinances be damned!