Ant Control

How We Protect Your Property

Species Identification Before Treatment With dozens of ant species active in Southern California, treatment without identification is one of the most common reasons ant programs fail. A repellent barrier that works on one species can cause another to fracture and spread. We identify the species before any product is applied. Ants don’t show up randomly — they’re responding to something. Understanding not just which species are present, but why they’re there, is what separates a lasting solution from a temporary one.

Non-Repellent Treatment — Colony Elimination, Not Displacement Most over-the-counter sprays are repellents. They kill what they contact and push the colony elsewhere — which is why DIY ant control so often fails. Janus uses non-repellent formulations that foragers carry back to the colony undetected, exposing the queen and brood. That’s how you eliminate a colony, not just relocate it.

Termidor® Ant Control For Argentine ant pressure — the dominant species in the San Gabriel Valley — Termidor® remains the gold standard. Its transfer effect means foragers spread the active ingredient through the colony without triggering avoidance behavior. Unmatched for sustained perimeter control.

Inspect. Exclude. Control. We locate entry points, assess conducive conditions — moisture, harborage, landscape contact with the structure — and apply treatments precisely where they’ll be most effective. We share what can be corrected to reduce pressure between visits.

Residential and Commercial Properties From single-family homes to restaurants, office buildings, and commercial campuses — ant pressure is property-specific. We assess each account individually and recommend service frequency that matches actual pressure, not a default schedule.

Argentine ants (Linepithema humile) don’t operate like most ant species. Rather than maintaining isolated colonies with defined territories, they form interconnected supercolonies — sprawling networks of multiple queens and millions of workers that can extend across entire city blocks. A single supercolony in Southern California has been documented spanning hundreds of miles of coastline, making Argentine ants one of the most ecologically dominant invasive species on the planet.

Standard repellent treatments don’t solve this. Push the colony in one direction and it simply re-routes around the treated zone.

Termidor® works differently. Its active ingredient, fipronil, is undetectable to foraging ants — they walk through treated zones, pick up the material, and carry it back through the colony network via normal contact and grooming behavior. The transfer effect reaches workers, queens, and brood that never contacted the treated surface directly. For Argentine ant pressure — where the colony you’re treating is likely connected to every other colony on the block — that transfer mechanism is the difference between suppression and control.

The Primary Species: Argentine, Carpenter, and Fire Ants in the San Gabriel Valley

Three ant species account for the overwhelming majority of infestations in San Gabriel Valley homes, yards, and commercial properties. They share the same neighborhoods but nest in different environments, enter structures through different routes, and respond to different treatment strategies. The Argentine ant dominates urban landscapes in sheer numbers. The carpenter ant compromises wood structures silently over time. The Southern fire ant defends its territory aggressively — and makes its presence known. Knowing which species you’re dealing with is the first step toward actually solving the problem.

Argentine Ant (Linepithema humile)

Activity Period Year-round. Argentine ants never go dormant in Southern California’s climate — colony pressure is constant, and populations peak in spring before summer heat drives them indoors in search of moisture.

Colony Structure Unlike most ant species, Argentine ants form interconnected supercolonies with multiple queens — eliminating the single-queen bottleneck that makes other species easier to control. Workers from neighboring nests cooperate rather than compete, allowing supercolonies to span entire city blocks.

Habitat and Entry Nests outdoors in shallow soil, mulch, landscaping, and beneath potted plants and pavement. Enters structures through foundation gaps, wall voids, and utility penetrations — following moisture trails to kitchens, bathrooms, and food storage areas.

Health Risk Argentine ants contaminate food preparation surfaces, pantry supplies, and water sources by trailing through sewers, soil, and decaying matter before entering your home. Bacteria, mold, and fungi are documented hitchhikers.

Why Standard Treatments Fail Repellent sprays push the colony — they don’t eliminate it. Argentine ant supercolonies re-route around treated zones within days. Effective control requires non-repellent chemistry that foragers carry back to the colony undetected — reaching queens and brood that never contact the treated surface directly.

Carpenter Ant (Camponotus sp.)

Activity Period Primarily nocturnal — peak foraging occurs after dark, which is why carpenter ant activity is frequently underestimated. Populations are most visible in spring when winged reproductives swarm, often the first sign homeowners notice of an established infestation inside the structure.

Colony Structure Carpenter ants operate through a parent colony and satellite colony system. The parent colony — containing the queen and brood — is typically located outdoors in moist or decaying wood. Satellite colonies of workers and pupae establish inside structures, linked to the parent nest through foraging trails. Treating only what’s visible indoors without locating the parent colony is the most common reason carpenter ant programs fail.

Habitat and Entry Nests in moist, decaying, or water-damaged wood — fascia boards, window frames, roof eaves, and subarea structural members are common target sites in SGV homes. Enters structures through gaps around utility lines, roofline penetrations, and wood-to-soil contact points.

Identification — Not a Termite The most common misidentification in the field. Carpenter ants excavate wood to nest — they do not consume it. Look for coarse sawdust-like frass near baseboards and entry points. Key visual differences: bent antennae, pinched waist, and two unequal-length wings on reproductives versus the straight antennae, broad waist, and equal-length wings of termites.

Structural Risk Left untreated, satellite colonies expand through sound and damaged wood alike — compromising structural members, insulation, and wall voids over time. The damage accumulates silently and is often more extensive than it appears when first discovered.

Why Standard Treatments Fail Surface sprays kill foraging workers but leave the satellite and parent colonies intact. Effective control requires locating the parent colony, treating satellite locations inside the structure, and addressing the moisture conditions that made the wood attractive in the first place.

Other Common Ant Species in the San Gabriel Valley

Not every ant call fits neatly into the top three. The San Gabriel Valley is home to dozens of ant species — several of which show up regularly in homes, yards, and commercial properties and require their own identification and treatment approach.