Stormin Mormon wrote:
One of their nests was burrowed into the wall, outside the
primary room. Somehow, a couple of them got into the primary
room, and one of the boys was stung last year. I do take
that seriously.

The nest was under the side wood, they enter and exit
through a hole about 3/8 inch diameter. I tried three or
four brand of wasp spray. Even sprayed the critters
directly. Got em wet. They don't seem to notice. The
facilities management people say some kind of powder blown
into the nest holes seems to help. Last year they got 30
complaints about wasps, from 10 buildings. That's a real
issue.



Sevin is a kind of slow acting powder. That's what you want. (if
you buy the wettable powder formulation, you're still going to use
it dry.) It just takes a little; you put it where you know some of
them will walk thru it. It gets on their feet, doesn't immediately
kill them, and they take it back to the nest and walk around getting
it all over the paper hive. In a couple of days, it kills all of
them. A fast acting poison, like pyrethrum or most wast sprays,
knocks them down right away and they don't get a chance to goto the
hive and poison all their wasp buddies.

Bob