Should I remove a wasp nest myself?
Removing a nest yourself is risky, especially a large nest, a hornet nest or one in a wall void. A nest that is sprayed or knocked down can release the whole colony at once, and the stings can be serious for someone who is allergic.
A homeowner with a small, open nest in a low, open position that no one uses may be able to treat it at dusk with a product labelled for wasps. Protective clothing, a plan for escape and a clear path are essential, and the product must be used exactly as the label says.
Any nest near a door, a window, a play area or in a wall is a job for a technician. The technician has the protective equipment and the access to treat the nest without the colony swarming through the house.
Why do wasps build nests under the eaves?
Wasps build under eaves and in sheds because the overhang gives shelter from rain and sun, and the flat surfaces give support for the comb. Paper wasps in particular use the underside of a soffit, a porch roof or a light fixture as a site for the nest.
A queen starts a nest in spring, and the colony grows over the summer. Workers add comb and cells until the nest is large enough to support many wasps, which is why a nest found in late summer is often much bigger than it looks in June.
A nest left in place does not usually cause damage to the building, but the activity around it does create stings. The removal is a matter of reducing that risk rather than fixing a structural problem.
Are stinging insects more dangerous to people with allergies?
Yes. A person who is allergic to stings can have a serious reaction after a single sting, and the reaction can develop quickly. Anyone with a known allergy should keep an emergency plan ready and should not work near a nest.
A sting reaction that involves swelling of the face, throat, lips or tongue, difficulty breathing, dizziness or a rapid pulse needs emergency medical care. A person with a known allergy is usually advised to carry prescribed medication and to tell the people around them.
The technician asks about allergies before the job and plans the work so that the allergic person is kept well away from the nest and the treatment. That planning is part of the service, not an extra.
When is a nest removed and when is it left alone?
A nest in an open, quiet place away from people can sometimes be left until the colony dies off in the cold, which usually happens by the first hard frost. A nest close to people, animals or a route in or out of the house should be removed or treated.
Wasp colonies do not reuse their nests after the season, so an old nest is not a continuing threat in the same way an active one is. Leaving an old nest up can be acceptable, but it can be attractive to other insects and should be checked.
A nest that is still active in late autumn can be a surprise, since the colony stays until the cold. The technician will say whether the nest is active and whether it should be treated before the work is set for the next season.
What should a homeowner do if stung several times?
Move away from the nest quickly, do not swat at the insects, and wash the stings with soap and water. A group of stings, or any sign of an allergic reaction, needs medical attention, and the nest should be reported to a technician once everyone is safe.
Walking away calmly and quickly is safer than running, which can draw more wasps. The insects that follow are usually a few workers, and they settle when the area is clear. Do not go back to the nest to check it.
After the sting, watch the person for the next hour or so. Swelling that spreads, hives across the body, or breathing difficulty means calling emergency services. Once the area is safe, call (855) 974-4733 to have the nest dealt with.