Wasps enter through one entrance and once this is blocked, the wasps will remain in the nest. Place a bag around the nest, blocking the entrance and then cut the nest off. Dispose of the nest contents. If physical control measures are not effective, use a pesticide which will have a minimal impact on both you and the environment. Wear protective clothing when applying pesticides to a nest.
Aerosols containing pyrethrin, rotenone and pyrenone are available.
These are the least-toxic products available. Insecticides in the form of dusts or baits can be used to control yellow jackets. The best approach is to apply a pesticide to the nest which will paralyze or stun the wasp immediately. If the above measures are not effective, consult with an expert at a garden center for additional pesticides available. Before using pesticides, consult the Backyard Bug Brigade Brochure which contains information on safe pest control.