The best strategy is to treat the wasp nest at night when all the workers and queen are present. Spraying into hornets nests should ALWAYS be done at night. They are far less aggressive and are all at home. This tactic maximizes the effect of the pesticide application by killing most if not all of the wasps.

When should you kill a hornets nest?

The best time to plan your attack is at sunrise or dusk, when these insects are least active. And remember to wait 24 hours to remove the nest, to ensure that the majority of the insects are dead or have flown away from the nest.

Should you kill hornets?

Hornets are something you want to exterminate. They don't help the ecosystem aside from eating other pests and they are a threat physically as they often sting in swarms. If you have a nest on your property you will want to get rid of it as fast as possible before it grows too large to destroy.