DIYbanter - View Single Post - How to kill hornets

RB[_2_]

wrote:
I have a set of three wooden steps resting on concrete outside a door. The
structure is completely enclosed, but with lots of cracks where hornets can
get in and out.

I am afraid to try to remove any of the boards to gain access. I can stick
a tube into the interior through a crack

At night, I tried pouring a small amount (all I happened to have) of
ammonia through the tube into the interior yo see if the fumes would kill
them or drive them out. It didn't happen.

Any suggestions will be appreciated. Thanks.

I've had a similar situation several times. Wasps nest in the crosstie
retaining walls all around my home. Vicious little *******s.

I use an insect fogger, taped to a long pipe or conduit.
turn it on, then hold it up to the access hole until it stops.
You may be able to rest it against - or on - something so you can back
off further. It works for me.

As others have said, at night, or the coolest time of day is best.

Another thing I've done that is satisfying though less effective:
Get your electric leaf vaccum, the one with the 4-ft long by 4" diameter
suction nozzle. Connect and extension cord, turn the switch on to high,
but don't plug it in. Prop the sucking end up so it's at their entrance
hole. then walk back and plug the unit in.
As the critters try to enter or leave, they get sucked in and
mulched. I had a large conical pile of yellow wasp pieces after 30
minutes or so. All it does is reduce the population though.