Updated

Updated · The Washington Post · Sep 13

Midwest Wasp Surge Drives Diners Indoors as Exterminators Report 30% Jump in Calls

Updated

Updated · The Washington Post · Sep 13

Midwest Wasp Surge Drives Diners Indoors as Exterminators Report 30% Jump in Calls

Q: Why might simply breathing near your favorite sweet summer drink turn you into a prime target for swarming yellow jackets?

Because yellow jackets are attracted by two cues at once: the sugar in the drink and the carbon dioxide in your breath. By late summer and early fall, yellow jackets shift from hunting protein to seeking carbohydrates and sugary liquids such as soda, beer, wine, juice and dessert residue. That is why they crowd patios, picnics and outdoor bars, and why an open sweet drink becomes such a strong lure. Experts cited in the reports say the insects can also react to carbon dioxide from human breath as a possible threat signal, especially if a nest is nearby. So when you lean over a sweet drink, you may be combining an attractive food source with a cue that puts nearby wasps on alert. In effect, your drink draws them in, and your breathing can make them more defensive. This is especially relevant this year because warm spring weather helped queens start nests early, producing larger colonies and more workers by late summer. With more yellow jackets active for longer, encounters around drinks are more common. Biologists stress that yellow jackets usually are not attacking people at random. They are foraging for sugar or defending a nest. Practical advice is to keep sweet drinks covered, avoid swatting, move slowly, and breathe away if you suspect a nest nearby.

Q: Why could sealing a tiny hole in your wall unleash thousands of aggressive yellow jackets directly into your living room?

Because if yellow jackets are nesting inside a wall void, sealing the tiny exterior hole can trap a colony of hundreds or even thousands and force them to find a new exit — often through drywall, vents, light fixtures or gaps that open into the house. That risk is highest in late summer and early fall, when colonies are at peak size. Experts say this year’s warm spring and extended mild weather gave queens an early start and allowed nests to grow larger than usual. A wall colony that looked like just a few insects using one small gap may actually contain a major nest hidden inside the structure. Pest-control guidance is clear: do not seal an active yellow-jacket entry point. Blocking it does not eliminate the nest. Instead, it can redirect defensive workers indoors, where they may emerge suddenly in living spaces and sting repeatedly if disturbed. Yellow jackets are not usually attacking at random, but they defend nests aggressively when trapped or threatened. The safer approach is to confirm repeated traffic to the opening from a distance and have the colony treated through the existing entry, often with insecticidal dust for concealed wall nests. The opening is typically sealed only after the colony is dead. If someone in the home is allergic to stings, professionals say not to attempt a do-it-yourself fix.

1 articles · Updated · The Washington Post · Sep 13

Yellow jackets arrived earlier and are lingering longer across the Midwest, pushing residents and restaurant patrons indoors as patios sit empty and pest crews struggle to keep up.
30% more wasp-related calls hit one Milwaukee exterminator starting in spring, including 50 new requests after Labor Day; he said a quarter-acre property had five ground nests, where two once would have been unlikely.
Warmer-than-average March and April weather gave queens more time to build nests and lay eggs, while shorter, milder winters and wetter conditions tied to climate trends helped more queens survive.
Late summer is worsening the nuisance because growing colonies shift from hunting protein to seeking sugar, sending wasps after sodas, beer and wine, and a warm September with no early frost risk could extend the season into October.
University of Illinois biologist Emily Laub said yellow jackets usually sting when they feel threatened near nests, and even human breath can trigger a defensive response because carbon dioxide signals a possible predator.

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The Washington Post7h ago

Midwest Wasp Surge Forces Residents Indoors Amid Warmer Weather Trends

How are unusually warm winters quietly transforming normal wasp nests into massive, aggressive super-colonies across the Midwest?

Why might simply breathing near your favorite sweet summer drink turn you into a prime target for swarming yellow jackets?

Why could sealing a tiny hole in your wall unleash thousands of aggressive yellow jackets directly into your living room?

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1 total

The Washington Post7h ago

Midwest Wasp Surge Forces Residents Indoors Amid Warmer Weather Trends

Midwest Wasp Surge Drives Diners Indoors as Exterminators Report 30% Jump in Calls

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