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Cornfield Ant Control Minnesota
Serving Minneapolis, St. Paul, and Minnesota homeowners since 1971
What Are the Small Brown Ants Making Mounds in My Driveway and Yard?
Cornfield ants (Lasius neoniger) are one of the most common yard-nesting ants in Minnesota. They build small, crater-shaped soil mounds in lawns, driveways, sidewalk cracks, and patio joints — often dozens of mounds across a single property.
Cornfield ants are primarily outdoor ants that rarely infest homes, but they produce massive late-summer mating swarms (August–September) that alarm homeowners when winged ants appear by the thousands.
Ants swarming near your house? Adam’s eliminates the colonies.
Call 763-746-9510 or click ‘Get Free Estimate’ — licensed Pest Management Professionals with same-day/next-day priority service available.
Why Do Cornfield Ant Colonies Require Professional Treatment?
Cornfield ant colonies require professional treatment because they damage driveways and patios, smother lawn areas, produce alarming late-summer swarms, and sustain underground aphid populations that weaken turf.
Driveway, Sidewalk & Patio Damage
Cornfield ants nest in cracks between pavement sections, under sidewalks, along driveway edges, and in patio joints. Their excavation pushes fine soil up through cracks, creating unsightly mounds and accelerating pavement deterioration. Heavy infestations can undermine pavers and flagstone patios.
Lawn Mound Damage
Each colony creates a small soil mound (1–3 inches tall). With dozens of colonies per yard, the cumulative effect smothers grass, creates uneven surfaces, and produces bare patches.
Massive Mating Swarms
In late summer (typically mid-August through September), colonies release large numbers of winged reproductive ants in synchronized mating flights. These swarms can involve thousands of winged ants and are frequently mistaken for termite swarms.
Honeydew Farming
Cornfield ants tend aphid populations on plant roots underground. This relationship sustains aphid damage to grass roots and garden plants. Eliminating cornfield ant colonies also reduces the aphid populations they protect.
ImportantWinged ants swarming near your home in August–September are almost certainly cornfield ants, NOT termites. Cornfield ant swarmers have a narrow waist and elbowed antennae; termite swarmers have a thick waist and straight antennae. Call 763-746-9510 for identification.
How Does Adam’s Treat Cornfield Ant Colonies?
Adam’s eliminates cornfield ant colonies through a three-step process: species identification, direct mound and perimeter treatment, and ongoing prevention to stop seasonal re-establishment.
1. Identification & Assessment
Licensed technicians confirm cornfield ant species (versus pavement ants, field ants, or carpenter ants), and assess severity of mound activity and swarming potential.
2. Colony Elimination
- Direct mound treatment of active colonies in driveway cracks, and patio joints
- Perimeter treatment around the foundation to prevent indoor entry during swarms
- Crack-and-crevice treatment in pavement joints and expansion gaps
3. Prevention
- Ongoing perimeter treatment prevents seasonal re-establishment
- Seal pavement cracks and expansion joints to reduce nesting habitat
- Reduce outdoor lighting during swarming season (August–September) to minimize attraction
- Address aphid-friendly conditions in landscape beds
Ongoing prevention plans provide year-round perimeter protection and catch new colony establishment before mound damage develops.
Ant mounds taking over your driveway? Call 763-746-9510 for a free estimate.
How Do Cornfield Ants Compare to Other Minnesota Ant Species?
Cornfield ants are frequently confused with pavement ants, field ants, and carpenter ants. Species identification determines treatment strategy.
Field Ant
What Are the Signs of a Cornfield Ant Problem?
The most common signs of a cornfield ant problem include multiple small soil mounds in your driveway, sidewalk, and lawn, and large numbers of winged ants swarming near your home in late summer.
- Soil mounds in pavement: Small crater-shaped mounds of fine soil in driveway cracks, sidewalk joints, and patio gaps
- Winged ant swarms: Thousands of winged ants swarming near your home in August–September, especially near lights in the evening
- Pavement deterioration: Fine soil pushed up through cracks, accelerating pavement degradation and undermining pavers
- Bare lawn patches: Grass thinning or dying around clusters of mounds
- Aphid damage: Weakened turf or garden plants from aphid populations protected by cornfield ant colonies underground
WarningWinged ants swarming in late summer are frequently mistaken for termites. Save a sample and call 763-746-9510 for identification.
What Are Adam's Cornfield Ant Control Programs?
Adam's offers ant treatment and ongoing prevention programs. Ongoing ant treatment starts as low as $159 per treatment.
One-Time Ant Treatment
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1 visit
- Best for: Active cornfield ants, immediate relief
- 3-month warranty
Premier Ant Prevention (2x)
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2 visits/year
- Best for: Ongoing ant prevention — spring and late summer
- Year-round guarantee
Premier Perimeter Pest (3x)
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3 visits/year
- Best for: Ants + common household pests
- 12-month guarantee
Premier Home Pest Prevention (4x+)
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4+ visits/year
- Best for: Complete protection — ants, mice, wasps, seasonal pests & more
- Year-round guarantee + unlimited service calls
Pricing varies based on home size and pest conditions. 24-Hour Priority Scheduling available in the 7-county Twin Cities metro.
Not sure which program is right for you?
Call 763-746-9510 or click ‘Get Free Estimate’ to talk with one of Adam’s friendly, knowledgeable customer service agents.
Why Do Minnesota Homeowners Choose Adam’s for Cornfield Ant Control?
- Licensed & Certified: State-licensed technicians with advanced training in ant species identification
- Board-Certified Entomologist: Dr. El Damir provides expert identification — critical for distinguishing cornfield ants from termite swarmers
- Local Expertise Since 1971: Over 50 years serving Minnesota homeowners — Adam’s understands seasonal swarming patterns
- Colony-Level Treatment: Adam’s eliminates entire colonies across your yard, not just visible mounds
- Prevention-Focused: Treatments timed to prevent swarming season problems
- No-Obligation Free Estimates: Zero pressure — call when you’re ready
What Can I Do About Cornfield Ants Before the Technician Arrives?
While you wait for your Adam’s appointment, these steps help your technician and improve treatment results:
- Note where you see mounds — driveways, sidewalks, patio joints, lawn areas
- If winged ants are swarming, save several in a sealed bag for species identification
- Do NOT pour boiling water, gasoline, or other home remedies on mounds — these are ineffective and may damage pavement or turf
- Do NOT spray mounds with over-the-counter insecticide — this kills surface workers but the queen survives underground
- Reduce outdoor lighting during evening swarms (August–September) to minimize attraction
- Seal gaps around windows and doors to prevent swarmers from entering living spaces
Critical: Do not spray mounds before professional service. Surface sprays kill workers but never reach the queen deep underground, leaving the colony intact.
Eliminate the Mounds. Prevent the Swarms.
Schedule within 24 hours. Licensed professionals. Serving Minneapolis, St. Paul & Twin Cities.
Cornfield Ant Control Questions
Ongoing ant treatment from Adam's starts as low as $159 per treatment. Pricing depends on property size and number of mound locations. All services include free inspection and species identification. Call 763-746-9510 for your free estimate.
Schedule Your Free Cornfield Ant Control Inspection
Schedule within 24 hours • Licensed professionals • Serving Minneapolis, St. Paul & Twin Cities metro
Eliminate the mounds. Prevent the swarms. Protect your driveway and lawn.
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