techniqu  

have dealt with this for years. my technique is to get a fifth of liquor glass bottle and fill it with gasoline. find the nest entrance hole and slam the bottle neck down into it. some of them will be flying around and after the bottle gets slammed there will be more. give things a few minutes to settle down as much as they're going to and to let the gas empty out of the bottle and seep down in and around the nest. then quickly remove the bottle. stand back a safe distance and throw a lit torch or rolled up lit newspaper onto the whole. the vapors will burn for some time and voila no more nest.