(FYI, commercial EPA-registered sprays must knock down wasps within 10 seconds). Yes and no. These traps contain an attractant, which draws wasps in, and then they drown inside the trap.

If the nest is inactive, you can scrape or knock it down. There are commercial wasp traps available or you can build your own ...

We report data obtained concerning the occupation of trap nests by xylicolous Crabronidae (sensu Melo 1999) in a study carried out in central Spain between 1992 and 1995. In particular, we analyze the ...