Boxelders and Stink Bugs: Springtime Visitors in Northern Illinois

As the snow melts away and the flowers begin to bloom in northern Illinois, you may notice some uninvited guests: boxelder bugs and stink bugs. These insects are commonly found in this region during the spring season, and while they might be a difficult nuisance, control is possible with the right treatment methods. Let’s explore some fun facts about these bugs and understand why they become so noticeable during this time of year.

Fun Facts About Boxelder Bugs

Colorful Appearance: Boxelder bugs are easily recognized by their striking black bodies adorned with red or orange markings. Their colorful appearance makes them easy to spot against plant leaves and building exteriors.

Maple Lovers: These insects love to hang around boxelder trees, a type of maple. They feed on the seeds, leaves, and flowers of these trees, although they do not cause significant harm to the trees.

Warmth Seekers: Boxelders are drawn to warmth, which is why you might find them sunbathing on the sunny side of your house. Once inside, they can remain hidden through the winter, becoming active again as temperatures rise.

Fun Facts About Stink Bugs

New Arrivals: Many are unfamiliar with this pest, as it only arrived in the United States in the 1998, and the first sighting in the Northern Illinois/Chicago was in 2010. It took until 2019 for it to become a common sight in the region.

Defensive Odor: Stink bugs are named for the unpleasant odor they release when threatened or crushed. This odor acts as a natural deterrent against predators.

Variety of Diet: Unlike boxelder bugs, stink bugs have a more varied diet, feeding on fruits, vegetables, and other crops. While they are not a significant pest in small numbers, they can be harmful to crops when they gather in large groups.

Shield Shape: These bugs are also known for their unique, shield-like shape, which makes them easy to identify. Their brown, green, or grayish color helps them blend into their surroundings.

Fun Facts About Asian Beetles

Colorful Invaders: Asian Beetles, also known as the Multi-colored Asian Lady Beetle, are known for their vibrant and varied coloration. Unlike native ladybugs, these beetles can range from yellow to orange or even red, with varying numbers of black spots.

Introduced Allies: Originally introduced to the United States in the late 20th century as a biological control agent for aphids and other crop pests, Asian Beetles have since become widespread across the country.

Overwintering Habits: During the colder months, Asian Beetles seek shelter indoors, often in large numbers. This habit can create a nuisance for homeowners as large clusters of beetles gather in attics and between walls, and appear again in the spring

Chemical Defense: Like other beetles, Asian Beetles have a defense mechanism where they excrete a yellow, foul-smelling fluid from their legs when disturbed. This can stain surfaces and leave an unpleasant odor.

Beneficial Yet Troublesome: While Asian Beetles are beneficial to agriculture by controlling pest populations, their tendency to outcompete native species and invade homes has made them a controversial presence in the United States.

Why Are They More Noticeable in the Spring?

Warmer Weather: As temperatures rise in spring, these bugs become more active as they come out of dormancy. They had been hiding in cracks, crevices, and even inside houses to escape the cold winter months. The insect version of hibernation is “overwintering”, which they wake up from once temperatures reach around 50 degrees.

Breeding Season: Spring is breeding time for many insects, including boxelders and stink bugs. This leads to an increase in their population as they search for mates and food sources.

Seeking Shelter: In the springtime, these bugs often seek out warmth and shelter as they transition back into an active lifestyle. You might notice them more as they congregate on sunny windows and warm walls.

Managing Asian Beetles, Boxelders and Stink Bugs

While these insects are generally harmless to humans and pets, their presence can be unwanted. Here are a few tips to manage their population around your home:

Seal Entry Points: Keep them out by sealing cracks, gaps, and other potential entry points in your home’s exterior.

Remove Food Sources: Reducing potential food sources by clearing your yard of maple seeds and other debris regularly can significantly reduce boxelder numbers in the springtime

Pesticide Treatments: Exterior pesticide treatments in the fall-time are the best way to reduce their activity not just in the fall, but in the springtime when they “wake up”. To successfully control them, treatment in the fall before they enter the home is best.

Embrace the arrival of spring with a better understanding of these intriguing insects. Whether you’re dealing with boxelder bugs or stink bugs, knowing why they’re visiting and how to manage their presence can help you enjoy the season more without unwanted guests. If you are seeing these pests, contact FVEPC for a free quote!