Top 10 Summer Pests in Northern Wisconsin—And How to Stop Them

Summer in Northern Wisconsin means long days, lake time, grilling, and soaking in everything the Northwoods has to offer. But while you're enjoying the outdoors, pests are making themselves comfortable—in your yard, garage, cabin, or even your home. At BugBoss The X-Terminator, we know exactly what pests to expect each summer and, more importantly, how to get rid of them.

Here’s our expert breakdown of the Top 10 summer pests in the region and the best ways to eliminate or prevent them.

1. Mosquitoes

Why They're a Problem:

Mosquitoes thrive in humid environments and near standing water—exactly what Northern Wisconsin offers in abundance. They’re not only annoying but can also transmit diseases like West Nile Virus.

How to Stop Them:

• Eliminate standing water around your property (gutters, birdbaths, tarps).
• Use larvicides in ponds or rain barrels.
• Schedule professional mosquito barrier treatments that target active and breeding zones.

2. Ticks

Why They're a Problem:

Ticks are common in wooded areas and tall grass. Deer ticks, in particular, are known for spreading Lyme disease, which is prevalent in Wisconsin.

How to Stop Them:

• Mow regularly and trim back wooded edges.
• Wear repellent-treated clothing when outdoors.
• Consider tick treatments around property perimeters and trails.

3. Ants (Especially Carpenter Ants)

Why They're a Problem:

While some ants are just a nuisance, carpenter ants can damage wood structures in homes, decks, and cabins. You might not see them until damage is already done.

How to Stop Them:

• Seal cracks in siding, windows, and foundations.
• Eliminate wood-to-soil contact around the structure.
• Get a professional inspection to determine nest location and treat effectively.

4. Spiders

Why They're a Problem:

Most spiders in Wisconsin are harmless, but they reproduce quickly and can invade sheds, garages, basements, and woodpiles. Their webs can create a creepy, cluttered appearance.

How to Stop Them:

• Knock down webs frequently.
• Remove clutter and woodpiles near entrances.
• Use perimeter sprays and eco-friendly interior treatments.

5. Wasps & Hornets

Why They're a Problem:

These aggressive stingers are territorial and often build nests under eaves, decks, or even in the ground. Late summer is peak season for attacks.

How to Stop Them:

• Inspect your property regularly for early-stage nests.
• Never try to remove a large nest yourself.
• Call BugBoss for safe, complete nest removal and prevention treatments.

6. Boxelder Bugs

Why They're a Problem:

Though they don’t bite or cause damage, these bugs gather in large numbers on sunny siding and find their way indoors through tiny openings.

How to Stop Them:

• Seal up cracks and entry points around windows and doors.
• Trim boxelder and maple trees near the home.
• Use residual perimeter treatments during early summer to reduce populations.

7. Mice

Why They're a Problem:

While not an insect, mice become more active in and around homes during the summer, especially in cabins and garages. They damage insulation, chew wires, and leave behind health hazards.

How to Stop Them:

• Keep food sealed and eliminate water sources.
• Seal small holes and gaps (mice can squeeze through openings the size of a dime).
• Use traps and call for rodent exclusion services if activity increases.

8. Earwigs

Why They're a Problem:

These pincher-equipped insects often enter homes through damp areas like basements or under mulch. While they’re not dangerous, they multiply quickly and can be unsettling.

How to Stop Them:

• Reduce moisture around the foundation.
• Clear organic debris near siding.
• Apply targeted crack-and-crevice treatments.

9. Cluster Flies

Why They're a Problem:

They often go unnoticed until late summer when they begin to gather on sunny surfaces and try to enter homes to overwinter.

How to Stop Them:

• Apply barrier sprays before late August.
• Caulk window frames and attic vents.
• Address infestations before they move indoors.

10. Fleas

Why They're a Problem:

Fleas often hitch a ride into homes via pets, wild animals, or even shoes. Once inside, they breed rapidly and can be difficult to eradicate.

How to Stop Them:

• Treat pets regularly.
• Vacuum carpets and wash bedding often.
• Use interior flea treatments with growth regulators to prevent eggs from maturing.

Don't Wait Until You're Overrun—Call the Experts at BugBoss

At BugBoss The X-Terminator, we specialize in seasonal pest control tailored to Northern Wisconsin's unique climate and ecosystems. Our locally based team understands what pests are active, when they peak, and how to stop them safely and effectively.

Whether you live year-round in the Northwoods or you're opening up your summer cabin, now is the time to take action. Let’s get ahead of pest problems before they escalate.

Message BugBoss today to schedule a free property inspection or seasonal treatment plan.