In article .com, told2b wrote:

weft2 wrote:
We've had some sort of big bee colony burrowing under our garden shed
for the past several years, and though I treated it somewhat
successfully a few years ago, I can't remember what the name of the
dust I used on it was. I got it at a Pest Removal store now long out of
business, and the only other Pesticide places around now won't sell to
the public, ie, they have to come and do it for you at great cost. They
also won't tell me what I need or where I can get the small can of dust
that I used before. I know it was made by Wilson, and that the Pest
store sold me a little accordian plastic bottle to puff the dust into
the bees' burrows. Is there some kind of similar product I can buy at a
Home Depot type store that will do the same job? I remember the dust
worked pretty well, but required several applications, and after the
bees were gone for a couple of years, I sort of let it slide- but now
they're back with a vengence.

you might want to read the thread on misc.consumers.house posted today
entitled "Bee Wars - How I Won the War".. This person used one of those
electronic bug zappers (the purple things that plug in and usually hang
on the wall) to kill her entire swarm of bees (~500-600 of them).. All
without using any pesticides, etc.. Perhaps this might work for you -- just
be careful when you place the thing out and do it at night when they're
(supposedly) sleeping.