Tuna + canola oil in a bowl or modified bottle traps catch many, but don't eliminate nests. Traps only provide patio relief. One design uses a bird cage to exclude raccoons.

Pic WTRP Yellow Jacket Trap (available at ALDI supermarkets and Amazon)

results after two days using tuna and 2 tablespoons of canola oil for bait

breakfast bowl using tuna plus three tablespoons of canola oil

yellowjacket trap (photo courtesy of David Cate)
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