Red Imported Fire Ant in Mobile, AL (Solenopsis invicta)
The red imported fire ant entered the United States through
the Port of Mobile in the late 1930s to early 1940s. Mobile is the
literal US entry point. The species is now established in all 67
Alabama counties, with Mobile and Baldwin among the highest-density
zones. Fire ant treatment is performed under ADAI HPC or OTPC/OTPS
certification.
Identification
- Worker: reddish-brown, polymorphic (sizes range
1.6–5 mm in the same colony) — size variability is
diagnostic. - Mound: loose, soft soil mound without a clear
central entry hole. Diameter 12–24 inches typical; multi-queen
mounds can be larger. - Behavior: aggressive defense response —
large numbers swarm onto an intruder within seconds. Stings cause
characteristic small pustules within 24 hours.
Why Mobile is the canonical fire ant story
- The Port of Mobile is the documented US arrival
point of both invasive fire ant species: Solenopsis richteri
(black, ~1918) and Solenopsis invicta (red, late 1930s). - Entomologist E.O. Wilson reported the first US
colony of Solenopsis invicta from the Mobile area at age
13. The Mobile arrival story is canonical in entomology. - Mobile and Baldwin counties carry typical density of 40–80
colonies per acre; polygyne (multi-queen) areas reach 200–600
mounds per acre. - USDA estimates imported fire ants cause more than $6 billion in
annual US damage, including direct medical, agricultural, and
electrical-equipment costs. - After Gulf hurricanes (Frederic 1979, Ivan 2004, Katrina 2005,
Sally 2020), fire ant colonies form floating rafts and invade
residential yards as floodwater recedes.
Damage & risk profile
- Medical. Stings cause pustules; severe allergic
reaction in a small subset of the population (anaphylaxis is a
medical emergency, call 911). - Electrical. Fire ants are documented to invade
HVAC condenser units, utility boxes, traffic signal cabinets, and
pool pumps. Short-cycling of an outdoor HVAC unit is a fire-ant
telltale. - Agricultural. Pasture damage, livestock harm,
crop seedling loss. - Wildlife. Documented impact on ground-nesting
birds and reptiles.
Treatment approaches our technicians use
- Two-step bait-then-mound method — the
Texas AgriLife / Auburn ACES recommended protocol: a broadcast bait
(slow-acting metabolic disruptor or insect growth regulator) is
applied across the yard, then active mounds are treated directly
7–14 days later. - Broadcast granular bait — for ongoing
maintenance, typically spring and fall when ants are actively
foraging at temperatures 65–90°F. - Direct mound drench / injection — for
high-priority mounds (playground edges, pool decks, around HVAC). - Pet-and-child-safe scheduling — product
selection and re-entry intervals managed to label spec by the
licensed operator.
When to call
- Mounds on a residential lawn with children or pets
- HVAC condenser short-cycling with visible fire ants around it
- Repeat stings on a household member with prior reaction history
- Post-hurricane raft invasion
- Commercial property (school, daycare, sports field, apartment
complex) needing pre-season treatment
ADAI categories
HPC (Household Pest Control) and OTPC /
OTPS (Ornamental & Turf Pest Control). See
ADAI licensing reference.
Related
- Fire ant control overview
- Hurricane pest prep & raft invasion
- All pests common in Mobile
- Mosquito control
- Emergency pest control
- ADAI licensing
Frequently asked questions
Are the technicians ADAI-licensed?
Yes. Every operator the call routes to is certified by the Alabama Department of Agriculture and Industries (ADAI) under HPC (Household Pest Control), WDC (Wood Destroying Organisms — required for termite letters / NPMA-33), or FC (Fumigation Pest Control). ADAI licensing is administered under Chapter 28, Title 2, Code of Alabama 1975 and Chapter 80-1-13 of the Alabama Administrative Code.
What’s the typical response time?
Routine dispatch: under 60 seconds on the call. On-site arrival: 2–4 hours during business hours (7am–9pm CT, 7 days) for most Mobile County and Baldwin County service areas. Emergency calls are routed to operators on 24/7 on-call rotation.
Do you cover my area in Mobile or Baldwin County?
The network covers all of Mobile County and Baldwin County, including Mobile, Daphne, Fairhope, Spanish Fort, Foley, Gulf Shores, Orange Beach, Bay Minette, Saraland, Tillman’s Corner, Theodore, and surrounding zip codes. See the full service area list.
What does pest control cost?
Pricing is set by the dispatched licensed operator, not by Mobile Alabama Exterminators. Published industry ranges: general pest service $90–$280/month, termite treatment $1,200–$2,500+, WDO inspection $100–$199, bed bug heat $1,500–$4,500+. See termite cost and bed bug cost guides.
Why choose Mobile Alabama Exterminators?
Broader coverage, faster response (the closest operator is dispatched), no pressure to upsell into a single brand’s bond or plan. Our technicians hold the appropriate ADAI license category for the work performed (HPC, WDC, or FC).
Related Mobile + Baldwin County coverage
Daphne
Fairhope
Spanish Fort
Foley
Gulf Shores
Orange Beach
Saraland
Termite Control
Bed Bug Treatment
WDO Inspection
Emergency Pest Control
Smaller Mobile + Baldwin County communities also covered
Bayou La Batre
Chickasaw
Satsuma
Prichard
Semmes
Mount Vernon
Citronelle
Wilmer
Grand Bay
Dauphin Island
Loxley
Magnolia Springs
Point Clear
Robertsdale
Silverhill
Summerdale
Elberta
Lillian
Stapleton
Perdido
Spring Hill
Midtown Mobile
West Mobile
Old Dauphin Way