Key Takeaways
- Yellow jackets become more active and defensive in late summer and fall.
- Most yellow jacket colonies die in winter, while new queens survive until spring.
- Yellow jackets may nest underground, beneath structures, or inside walls and attics.
- Securing garbage and removing fallen fruit can help reduce yellow jacket activity.
- Professional control can help eliminate established or hidden yellow jacket nests.
Cooler weather doesn’t necessarily mean an end to wasp problems on Long Island, NY. In fact, yellow jackets can become particularly troublesome during late summer and fall, when their activity around homes, patios, gardens, and outdoor gatherings often increases.
Yellow jackets are social wasps that live in colonies and behave differently from many other wasps. As the season changes, their feeding habits and defensive behavior can bring them into closer contact with people. Understanding these seasonal changes can help you avoid unnecessary stings and know when to seek professional assistance.
Arrow Exterminating Company has more than 75 years of experience helping homeowners throughout Long Island, NY, with yellow jacket and wasp control.
Why Are Yellow Jackets and Wasps More Aggressive in the Fall?
Yellow jacket colonies grow throughout spring and summer and can reach their largest populations by late summer. As fall approaches, the queen stops producing eggs, and the colony begins to decline. With fewer larvae to feed, worker yellow jackets spend more time searching for food for themselves.
This change in behavior is one reason yellow jackets become such a nuisance in the fall. Workers are attracted to sugary foods and drinks, ripe or fallen fruit, garbage, and other food sources around homes. Their increased scavenging activity can bring them into closer contact with people.
Yellow jackets are also capable of defending their nests aggressively. A colony located beneath a deck, near a walkway, inside a wall void, or in another area where people regularly pass can create a significant sting hazard.
What Happens to Yellow Jackets When It Gets Cold?
Yellow jacket colonies are generally active from spring through fall. As temperatures drop, the workers and the old queen eventually die, leaving only newly produced queens to survive the winter.
These new queens leave the original colony after mating and seek protected locations where they can spend the winter. When warmer weather returns in spring, the surviving queens emerge and begin the cycle again by establishing new colonies.
This means that the yellow jacket nest you see in the fall will not normally remain active throughout the winter. However, waiting for cold weather is not necessarily the best option when a nest is located close to your home or an area where people spend time.
Where Do Yellow Jackets Nest?
Yellow jackets can build nests in a variety of locations, including underground and in or around structures. Some species may use wall voids, attics, landscaping features, or other protected spaces.
Knowing where yellow jackets commonly nest can help you recognize areas that may require attention. Potential nesting locations include:
- Underground burrows or cavities
- Wall voids and other spaces within buildings
- Attics and enclosed structural areas
- Beneath decks, porches, or other structures
- Landscaping features and protected outdoor areas
- Around eaves and other sheltered portions of a building
A nest does not always need to be visible to create a problem. If yellow jackets repeatedly enter and leave a particular opening in your home, there may be a nest hidden within the structure.
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Will Killing a Yellow Jacket Attract Other Yellow Jackets?
There is some truth behind this common concern, but the situation is more complicated than simply saying that killing one yellow jacket will automatically attract others.
Yellow jackets communicate with chemical signals, and defensive alarm pheromones can be released when a colony is disturbed or a yellow jacket is injured or killed. These signals can cause other members of the colony to become more defensive.
For that reason, swatting at yellow jackets near an active nest can increase the risk of being stung. It is better to move away from the area rather than disturb insects that may be defending a nearby colony.
How Can You Avoid Yellow Jackets in the Fall?
Fall yellow jacket activity can make outdoor activities more difficult, but a few simple precautions can reduce the conditions that attract them. Homeowners can help limit encounters by:
- Keeping garbage containers tightly closed.
- Cleaning up spilled food and drinks promptly.
- Covering food and beverages when eating outdoors.
- Picking up fallen or overripe fruit from the ground.
- Avoiding unnecessary disturbance around suspected nests.
- Watching for yellow jacket activity around decks, landscaping, and building openings.
These steps can help reduce food sources and limit encounters with foraging yellow jackets, but they will not eliminate an established nest. Professional wasp and yellow jacket control may be needed to address an active colony.
Frequently Asked Questions About Yellow Jackets and Wasps
How long can yellow jacket nests remain active in the fall?
The timing varies depending on the species, weather, and local conditions. Yellow jacket colonies can remain active well into fall, particularly when temperatures remain mild. As colder weather arrives, worker activity declines, and the colony eventually dies off, leaving newly produced queens to survive the winter.
Why are there so many yellow jackets around my fruit trees in the fall?
Ripe and overripe fruit can become an important food source for yellow jackets in late summer and fall. Fallen fruit that has begun to ferment can be particularly attractive. Keeping fruit trees and the surrounding ground free of fallen or rotting fruit can help reduce the food available to foraging yellow jackets.
Do yellow jackets return to the same nest every year?
No. Yellow jacket colonies are generally annual, meaning the old colony dies at the end of the season. Newly produced queens survive the winter and establish new colonies when spring arrives. An old nest is not normally reused the following year, although a new queen may establish a colony in the same general area if suitable food, shelter, and nesting conditions are available.
Can yellow jackets build nests inside a house?
Yes. Some yellow jacket species may establish nests in wall voids, attics, or other concealed areas of a building. You may not see the nest itself, but repeated yellow jacket activity around a particular crack, vent, roofline, or other opening can indicate that a colony is located inside or near the structure. A professional inspection can help determine where the insects are coming from.
When should I consider professional pest control for yellow jackets?
Professional pest control may be appropriate when yellow jacket activity is persistent, a nest is located near your home or frequently used outdoor areas, or the nest is hidden inside a wall, attic, or another difficult-to-reach location. Attempting to disturb an established colony can increase the risk of multiple stings. A professional can identify the type of wasp, locate the source of the activity, and determine the most appropriate way to address the problem.
Professional Wasp and Yellow Jacket Control on Long Island
A few yellow jackets in your yard do not necessarily mean there is a nest nearby. However, you should contact a professional if you see large numbers of yellow jackets, find a nest near areas where people gather, notice insects repeatedly entering and exiting the same opening, or if someone in your household is allergic to stings. Fall activity can be especially frustrating because yellow jackets are actively searching for food and may become more defensive around their nests.
Trying to eliminate a nest yourself can expose you to multiple stings, especially when the nest is hidden or difficult to access. Professional pest control technicians can identify the insects, locate an active nest, and recommend an appropriate treatment. Arrow Exterminating Company provides professional wasp and yellow jacket control throughout Long Island to help homeowners address established nests and reduce sting hazards around their property.
If yellow jackets or wasps are becoming a problem around your home, contact Arrow Exterminating Company today to learn more about professional pest control services on Long Island.
