It’s still that time of year where yellow jackets are buzzing around every outdoor party in search of a tasty treat. Since Summer took its sweet time coming to Denver this year, we are seeing yellow jacket and wasp activity extend later into the year. Yellow Jacket nests have grown larger in size and their inhabitants are much more aggressive… you could even say that they are in “attack” mode.

Unfortunately, not all nests are visible. Some yellow jackets nest underground (as shown in the video above) in rock voids, old rodent tunnels, or just plain old cracks in the dirt. These ground nests can be more difficult to identify as you often have to track the flight pattern of the yellow jackets to discover the entrance. Once it is identified treatment can take place and though removal of the nest isn’t always practical it can be fun to see what was hidden beneath the surface.

When yellow jacket nests are in trees (pictured below) or along the structure of the home, they are typically easier to spot and can be treated before removal takes place.

Yellow Jacket Nest


Some sources may recommend “waiting a few weeks” until the first frost and you won’t have to worry about the yellow jacket activity anymore. While it’s true that the workers, drones etc of the colony will die off during sustained periods of cold weather, the new queen will survive. Therefore, it is important to treat nests and activity to prevent the queens from overwintering and starting new colonies next year.

DIY Nest Treatment

If you are a “do it yourselfer,” you may enjoy treating yellow jacket nests. However, it is important to do so during the cool of the day when the yellow jackets are more lethargic and less likely to sting. Most over the counter products are “kill on contact” so you will need to spray all of the yellow jackets to successfully exterminate the nest. Then it can be removed and sealed inside of trash bag.

Keep in mind, DIY treatments are best done on visible nests that can be physically removed after the treatment is complete. Nests that are hidden underground or in cracks/crevices of a structure may need professional products to achieve the desired results.

Professional Treatment

Certified Pest Control Operators are skilled at locating both the visible and “invisible” nests and are equipped with the tools to treat each nest professionally. They also have access to products that are not available over the counter and can often achieve results more effectively.

At Whitmore Pest & Wildlife Control, each of our pest control professionals are certified and trained to provide the best service possible. Let our team take the risk of getting stung so you can start enjoying your outdoor space again!