Wbgalloway from Concord Nc writes
We sprayed the outside entrance and now they are coming in thru cracks around duct-work in the ceiling
Please check out our article "How to Get Rid of Yellow Jackets". If you can get to the openings where the yellow jackets are coming in and out from we highly recommend applying a dust like Tempo 1% Dust and when the yellow jacket comes in contact with it, the dust will transfer from yellow jacket to yellow jacket and kill off the entire nest.
Answer last updated on: 10/05/2013