As ecologically beneficial, native members of our ecosystem, we would normally say that removal is not recommended if a Baldfaced Hornet nest can be avoided until autumn/winter, when the nest members will die out. If some type of fencing, sign, or other warning or barrier can't be used to keep people far enough away from the nest (a few feet in all directions should be all that's needed, both for people walking and anyone mowing the grass directly under the nest), then it might need to be treated. Wasp spray, used as directed on the product label, is the only option, and it will kill the wasps (probably over the course of a few days).

Miri

Okay, thanks very much.

You're welcome.