The very big size.
Yellow jackets in concrete wall.
The most common nest locations of these insects are wall voids voids in concrete blocks attics and drop ceilings.
Sometimes yellow jackets will nest in various elements of a home or structure such as ceiling and wall voids in the eaves behind fascia board soffits in hollow cement blocks and inside excavated wood galleries.
We had a yellow jacket colony inside the bricks of our house.
Please check out our article how to get rid of yellow jackets.
They will come out in the spring looking to go outside.
We noticed this a few weeks ago when there where literally hundreds of yellow jackets flying in and out.
When yellowjackets nest inside buildings in wall or ceiling voids in concrete block or in attics they come and go through a nest opening on the outside of the building.
I cut out the bottom of a clear plastic club soda bottle.
There is a small air vent hole in the mortar and that is where the queen got in.
If yellow jackets have gone into the walls during cold weather some of the reproductive yellow jackets may survive in the walls.
Often inhabitants don t even know that there is a yellowjacket nest in their home.
But if you re feeling bold you can take steps to eradicate them yourself.
Such nests are best treated by drilling into the infested void and injecting the nest with delta dust insecticide.
Removing yellow jacket nest out of the wall.
Once you locate the nest put on protective clothing such as pants a long sleeve shirt long socks and a hat and prepare for a spray and run.
Yellow jackets build their nests in cavities and crevices such as a wall void beneath eaves under porches and rodent burrows in the ground.
If you have yellow jackets in your wall it s best to contact an exterminator.
Each insect stings multiple times and injects venom into its victim.
Yellow jackets are a type of wasp that typically live in the ground although there are a few varieties that also build nests in eaves and crevices of homes.
If the nest is in a very warm location however the whole nest could survive the winter.
If you can get close we highly recommend applying a dust like delta dust that is water proof and when the yellow jacket comes in contact with it the dust will transfer from bee to bee killing adults and larvae.
This product would be great to use in those cracks in the cement blocks.