Korean Lilac ( about 12 years old )

they think it's a nest...fly in and can't get out? diabolical. smile.

No.. Not quite the right answer.
Wasps are very territorial and they do think it is a nest so they usually won't build their nests within 200 feet of another nest. So far so good.I have 2 of them around the patio area and now can sit outside with my lunch and haven't see any for a few days.
Barb

Aw Shucks with a name like waspinator I was having a flight of fancy. Still, great idea that works...