Today I resorted to baiting yellow jackets with cat food mixed with Fipronil (Generic Frontline for cats and dogs). Basically the yellow jackets are decimating my hives. As I walked to the bee yard the box with the bait and my arms became covered with yellow jackets. I was wearing full PPE.
The yellow jackets cleaned out the bait stations within 90 minutes.

If anyone has used Fipronil baiting for yellow jackets, have you found something less expensive then the dog and cat version?