There is a trap for wasp, hornet's and similar flying critters. Just check with your favorite vendor be it Thezone,Home Dep or Wallyworld.
Just be aware these are attractant type or bait traps.
I don't know of a Toxic area spray outside of DDT or similar products and that would be more harmful and probably illegal. It would probably kill any and all critters and that would create a bigger problem.
You might check with a local exterminator or county extension office.
Tread lightly and carry a big fly smacker thing.