How to Kill Bald-Faced Hornets

Spray the nest with an aerosol insecticide from 20 feet away at night. The colony is least active at night, and there are more hornets in the nest at that time. Wear protective clothing just in case a few come out and attack. Spray the entrance hole first, then thoroughly wet the rest of the nest. Repeat again the next night to get any stray hornets that might have been away the previous night. Observe during the day if any hornets continue to fly in and out of the nest. Once no hornets are observed at the nest, take it down.

Pest products suggest using a second insecticide after you spray the aerosol insecticide from afar. Once the nest is knocked down, stick a can of insecticide with a long tube into the nest and squeeze three to four times, then leave. This will inject insecticide deep into the nest and will ensure all the hornets are dead.

Contact an exterminator if you do not want to do the dirty work yourself. Exterminators will come to your property and do the job for a fee, and you will not have to worry about dive-bombing hornets.

Allow nature to take its course and kill them naturally. Unless the bald-faced hornets have made a nest on your house and are a menace to visitors, it is best just to leave them be for the season. Only the queen survives the year; the rest die when the weather starts to get cold. They will not reuse the nest next year; they will start anew with a new nest in a new location. Patience is the most natural way to deal with the bald-faced hornet.