A quart of gas is too much and is dangerous. 1/4 cup is enough. A brick on the entrance is a good idea.
KEH
That was my first thought. A quart is way more than needed. I would have guessed a cup was more than enough. Wait until dusk so they are all inside. Then quickly dump it in and slap a brick on before any can get out. You could even put some screen down first, then dump in the gas if you are worried some may escape.
A quart of gas is too much and is dangerous. 1/4 cup is enough. A brick on the entrance is a good idea.
KEH
Go to home depot and buy a can of the spray made to kill them. Thats what I did last time. Cant remember what brand it was but it worked just fine. You wait till dusk like the others said and then you spray it in the nest. Its like a foam and any that do come out will touch it and get killed.
...Approaching a nest at night does not guarantee safety though.
I did one at like 10pm and they were not having it but fortunately I was in full bee suit so no harm.
I trigger a raid house fogger can next to the opening and immediately invert a 5 gallon bucket over the can and the nest entrance with a brick on top.....next day no activity
...Again, my question is whether a trap is likely to capture enough workers to wipe out the nest...
You people are no fun. Around here it is pour up to 1 gallon of gas down the hole and wait at least 30 minutes for it to complete vaporize. Then pour a gas fuse at least 200 ft and light. It will blow like dynamite. Not recommended for urban settings or near anything but open land.

A spoonful of Sevin dust will kill them.
A quart of gas is too much and is dangerous. 1/4 cup is enough. A brick on the entrance is a good idea.
KEH
You people are no fun. Around here it is pour up to 1 gallon of gas down the hole and wait at least 30 minutes for it to complete vaporize. Then pour a gas fuse at least 200 ft and light. It will blow like dynamite. Not recommended for urban settings or near anything but open land.
BTDT. It does, but slowly (think days, not seconds), and only if the Sevin is fresh. I've had Sevin that was on the shelf for a few years not work at all. My wife was also stung at night by a yellow jacket that was as white as a ghost and that looked just like a moth because it was so thoroughly coated in dust. It would have been funny had she not been stung.

Any type of "bees" that I have used it on, have been dead by the next day.
Maybe I just have better luck ?![]()
Maybe. I do think that batch of Sevin was just too old to be effective. 5% Sevin dust is also 95% diatomaceous earth, which is also insecticidal, but is much more slow acting. The nest in question was still dead within 48 hours.
But I've also seen Drione dust drop wasps right out of the air (and Delta dust is nearly as strong), so there are some rather fast acting dusts out there for the riskier situations.
