Really only a contact killer
By Steve on 08/13/2012
Verified Purchase
This product is truly only a contact killer. I have a nest somewhere in my attic, with the yellow jackets entering through a hole in the siding/flashing. Spraying deep into the hole at night must be killing some bees, but I obviously am not reaching the nest. Two days after spraying the bees are back and still abundant. If you can't get direct access to the nest, try a different product.
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