We have been invaded by a yellow jacket nest in the middle of the front yard. We have sprayed twice with a 20 percent foam spray. They are still here. 1. Would there be an extra problem because we have mole trails beneath the yard? 2. Any ideas other than setting them on fire. I wouldn't want to break any city ordinance.
For yellow jackets in the ground nest I return at night and mix up a strong one gallon cocktail of Malathion and Diazinon in a bucket. I quickly pour the cocktail down the hole and set the empty bucket on top so the yellow jackets are trapped in the nest and leave it there until the next day. Usually one treatment works but I keep an eye on the nest for the next few days.
Two summers ago, we had a terrible yellow jacket infestation in the outside wall of our house.
Very large insects were squeezing in through our kitchen door and tinier ones were sneaking in through the living room window.
Finally, the colony started infiltrating my sister's bedroom, whose windows were directly above the outside colony entrance.
Because my sister was away at the time, we ended up having to close her door and plug it with beach towels to keep the yellow jackets from spreading.
It got so bad, we finally had professional exterminators over, who estimated the colony in the thousands.
They administered poison in the colony's entrance, but after a couple of weeks, the problem was no better.
We threatened to put a hold on the uncashed check, so the exterminators came back, and put more poison in.
However, we didn't see a complete end to the bothersome visitors until a bitterly cold snap in the fall.
My father caulked over the entrance as a final measure, and that was that.
You can still find a previously unnoticed corpse under a piece of furniture or in a window sill every now and then.
I can only imagine the pile of yellow jacket bodies inside the wall that will never be exposed.
I've been looking into removing a nest on my kids playtoy (got stung yesterday--that's how I found out about the nest!) Spraying aerosol poison can be risky. Even at night, when the stream hits the nest some yellow jackets can escape. Plus you risk poisoning birds and others who feed on wasps and their larva. Gasoline seems like a very bad idea. It will kill any grass or plants it touches, leech into the ground (possibly contaminating groundwater) with the next rain. I'm going to fill my shop vac with soapy water (kills the wasps), suck in the whole nest and plug the hose til they die!
When we had one in the middle of a flower bed, we put a clear bowl over the main exit to the hive. The sun baked the hive and the workers could not get out. We never did find the secondary entrance, but after a couple of weeks, the colony had died anyway.
Do this at night when they're dormant!