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Understanding Odorous House Ants in Edwardsville, IL

odorous house ants in Edwardsville, IL homes
beware of odorous house ants Edwardsville, IL

As a homeowner in Edwardsville, IL, you may have encountered various types of ants invading your space at some point. One common but often misunderstood ant species is the odorous house ant (Tapinoma sessile). In this blog, we will delve into what homeowners need to know about odorous house ants, their habits, identification, and effective ways to deal with these tiny, resilient pests.


Odorous house ants are relatively small, ranging from 1/16 to 1/8 inch in length. They are typically dark brown to black in color, and their bodies have a distinct, uneven shape, with a segmented appearance. What sets these pests apart is their unique odor when crushed or disturbed. When squashed, odorous house ants emit a foul, rotten coconut or “rotten butter” smell, which is where their name comes from.

Habitat and Behavior

Understanding the habitat and behavior of odorous house ants is essential in effectively dealing with infestations:

  • Nesting Locations: Odorous house ants are highly adaptable and can nest both indoors and outdoors. Common outdoor nesting sites include soil, mulch, leaf litter, and beneath stones or debris. Indoors, they are often found in wall voids, around water pipes, and near heating sources.
  • Foraging Patterns: These pests are opportunistic foragers, seeking a wide range of food sources. They are especially attracted to sugary substances but will also consume proteins, pet food, and even dead insects.
  • Colony Size: Odorous house ant colonies can range in size from a few hundred to several thousand individuals. Multiple colonies may exist in close proximity, making infestations challenging to control.
  • Seasonal Variations: Odorous house ants are active year-round, but their behavior may change with the seasons. In cold weather, they tend to move indoors in search of warmth and food, often causing winter infestations.

Problems Associated with Odorous House Ants

While odorous house ants are not known to transmit diseases like some other pests, their presence can still be problematic for homeowners:

  • Contamination of Food: These ants can easily contaminate food items and kitchen surfaces, potentially leading to foodborne illnesses.
  • Property Damage: Odorous house ants may nest in wall voids and cause structural damage over time.
  • Nuisance: The presence of ants inside your home can be an annoyance, and their unpleasant odor can linger when they are crushed.
Edwardsville, IL homeowners guide to odorous house ants

Prevention and Control

To prevent and control odorous house ant infestations, consider the following strategies:

  • Maintain Cleanliness: Keep your kitchen clean and focus on getting rid of crumbs. Store food in airtight containers and promptly clean up pet food dishes.
  • Seal Entry Points: Inspect your home for cracks, gaps, and openings that these pests and others can use to enter. Use weatherstripping or caulk to seal off entry points.
  • Eliminate Moisture: Odorous house ants are attracted to moisture. Fix leaky pipes, faucets, and appliances, and use dehumidifiers to reduce indoor humidity.
  • Trim Vegetation: Keep outdoor vegetation and trees trimmed away from your home to prevent ants from using branches as bridges to access your property.
  • Professional Pest Control: If you have a persistent odorous house ant problem, consider hiring a licensed pest control professional around Edwardsville, IL. They have all the necessary skills and equipment to manage infestations.

Having issues with odorous house ants in Edwardsville, IL? Contact IMEL Pest Control!

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