How to Get Rid of Wasps and Hornets Safely

Wasps and hornets are among the most anxiety-inducing home pests — and with good reason. Unlike honeybees, most wasps and hornets can sting repeatedly. Yellowjackets are aggressive and will pursue anyone who disturbs a nest. Bald-faced hornets defend their territory vigorously. And for people with venom allergies, a sting can be life-threatening.

But wasps are also ecologically valuable — they prey on caterpillars, flies, and other insects, making them important predators in garden ecosystems. Knowing which species you’re dealing with, where the nest is, and the safest removal approach is the foundation of effective control.

Common Wasp and Hornet Species

Yellowjacket (Vespula and Paravespula species)

Description: Bright yellow and black banded body, about 1/2 inch. Narrow waist. No visible hair on the body (unlike bees).

Nest: Paper nests in voids — underground burrows (most common), wall voids, attics, under eaves. Underground nests can be very large by late summer (10,000+ workers).

Behavior: Aggressive defenders of the nest. Will pursue and sting repeatedly. Peak aggression in late summer as colonies reach maximum size and food sources become scarce (they scavenge at picnics, garbage cans, and outdoor food).

Bald-Faced Hornet (Dolichovespula maculata)

Description: Black and white body, about 3/4 inch. Bold white markings on face and abdomen.

Nest: Large, papery, football-shaped aerial nest in trees, shrubs, and occasionally on structures. Up to 700 workers at peak.

Behavior: Aggressive defenders with a spray capability (they can spray venom toward perceived threats). Treat any nest larger than a golf ball as a professional job unless you have appropriate protective equipment.

European Hornet (Vespa crabro)

Description: Larger than a yellowjacket (about 1 inch), brown and yellow coloring. The only true hornet in North America.

Nest: Inside hollow trees, wall voids, and attic spaces. Paper nest. Less visible than bald-faced hornet nests.

Behavior: Moderately aggressive; less likely to pursue than yellowjackets. Active at night — the only stinging insect commonly active after dark.

Paper Wasps (Polistes species)

Description: Slender, reddish-brown to black with yellow markings. About 3/4 inch. Long, dangling legs in flight.

Nest: Small, umbrella-shaped open paper nest (combs visible). Built under eaves, inside window frames, deck railings, and other sheltered structures.

Behavior: Generally less aggressive than yellowjackets. Will sting if the nest is threatened or they’re cornered. The most common wasp around homes.

Cicada Killer Wasp (Sphecius speciosus)

Description: Very large (1.5 inches), black and yellow. Often alarming due to size.

Behavior: Solitary — does not build social colonies. Rarely stings humans (only if handled). Digs burrows in sandy soil to provision with paralyzed cicadas. Usually not a pest requiring control.

Step 1: Locate the Nest

Before treatment, locate the nest completely. This is critical because:

• Treatment is applied directly to the nest or nest entrance
• Partially treating a nest pushes wasps into walls or living spaces
• Knowing nest location determines timing and safety

Signs of a nest:

• Consistent wasp traffic in and out of a specific point
• Paper-like material built in protected areas (eaves, porch ceilings)
• Wasps disappearing into holes in the ground, siding, or wood

Observation tip: Follow returning wasps from 20+ feet away. They fly in a direct line to the nest entrance.

Step 2: Choose the Right Approach by Nest Type

Aerial Paper Nests (Paper Wasps and Bald-Faced Hornets)

Treatment:

1. Wait until dark — wasps are slow and clustered on the nest
2. Wear protective clothing: long sleeves, gloves, eye protection
3. Use a jet-spray wasp killer (Spectracide Wasp & Hornet Killer or Raid Wasp & Hornet Killer) — these shoot a 20+ foot jet of insecticide that allows you to treat from a safe distance
4. Spray directly into the nest opening (or all over the nest for aerial paper nests)
5. Retreat immediately after application
6. Return the next morning to confirm activity has stopped
7. Knock down the nest after 24–48 hours of no activity

For small paper wasp nests under eaves: Treat at night; the nest can be knocked down the following morning with a long stick and bagged.

Underground Yellowjacket Nests

Underground nests are the most dangerous to treat — the entrance can be small, but the nest can be enormous.

Treatment:

1. Treat after dark when all foragers have returned
2. Wear protective clothing including face protection
3. Apply Drione dust or Delta Dust (deltamethrin or bendiocarb dust) directly into the entrance hole using a duster
4. Mark the entrance and leave it undisturbed overnight — the dust is carried into the nest by returning workers
5. Do NOT plug the entrance immediately — this traps workers inside and increases agitation
6. Seal the entrance after 24–48 hours when activity has stopped
7. Alternatively: Pour 1/2 cup of Tempo dust or Sevin Dust into the nest entrance at night — effective and readily available

For very large underground nests or nest locations inside wall voids: Professional treatment is strongly recommended.

Wall Void and Attic Nests

If wasps are entering a hole in siding, under window trim, or through gaps in the roof, the nest is likely inside a void.

Treatment:

• Apply dust insecticide (Drione or Delta Dust) into the void through the entry hole at night
• Do NOT seal the entry immediately — allow workers to carry dust into the nest for 48–72 hours
• After activity stops, seal the entry point permanently
• Important: Do not seal entry holes to active wasp nests during the day — wasps will find new exits (possibly into your living space)

Step 3: Prevention

Remove Nest Sites and Attractants

• Caulk gaps and crevices in siding, window frames, and eaves before spring (when queens establish new nests in April–May)
• Remove old, abandoned nests — queens sometimes reuse old nest locations
• Keep garbage cans with tight-fitting lids
• Clean up fallen fruit promptly
• Avoid leaving sweet drinks, juice, or meat outdoors during peak yellowjacket season (August–September)

Decoy Nests

Paper-mache decoy “wasp nests” (like Waspinator) exploit wasp territorial behavior — queens establishing new colonies in spring avoid building near what they perceive as an existing colony. Effectiveness is inconsistent but worth trying as a low-cost preventive.

Traps

RESCUE! Yellowjacket Trap uses a liquid attractant to capture yellowjackets — effective for reducing forager populations around outdoor dining areas. Replace attractant every 2 weeks.

Sting Safety

If stung:

• Remove the stinger by scraping with a card (for bee stings — wasps and hornets don’t leave stingers)
• Apply ice to reduce swelling and pain
• Take an oral antihistamine (diphenhydramine) to reduce local reaction
• Watch for signs of anaphylaxis: hives spreading beyond the sting site, throat tightening, difficulty breathing, lightheadedness — these require emergency medical attention (call 911)

If you have a known venom allergy, carry an epinephrine auto-injector (EpiPen) and seek treatment immediately after any sting.

When to Call a Professional

• The nest is inside a wall, attic, or inaccessible void
• The nest is very large (larger than a football, or an underground yellowjacket nest active in late summer)
• You have a known insect venom allergy
• The nest is in a high-traffic area where accidental disturbance is likely
• You’re unsure of the species or nest location

Recommended protective gear:

• Bee suit with veil (Humble Bee 410 Polycotton Beekeeping Suit) for any close-approach treatment
• Nitrile gloves under the suit cuffs

Bottom Line

Most small paper wasp nests under eaves can be safely treated at night by a homeowner with a jet spray and basic protective clothing. Underground yellowjacket nests require more care — dust insecticide at night is the most effective approach. Large nests, wall void nests, and any treatment when someone in the household has a venom allergy should involve a licensed pest control professional. Timing matters: treat at night, act quickly, and retreat immediately after application.