Pest Control in San Marcos, Texas

Yes. We connect San Marcos homeowners and businesses in Hays County with licensed, state-certified pest management professionals. Our network covers all of Texas and is available for pest inspections, treatments, exclusion, and recurring management programs in San Marcos and surrounding communities. Call (844) 920-3454 to speak with a Texas-licensed pest control professional.

Subterranean termite swarming in San Marcos typically occurs from late March through May, triggered by warm soil temperatures and post-rain conditions. However, termite colonies in Hays County are active year-round — the swarm is the colony's reproductive event, not the beginning of activity. Swarming indoors or finding shed wings is a strong indicator of an established nearby colony and warrants a professional inspection regardless of time of year.

Structural damage from subterranean termites rarely develops overnight, but colonies with several hundred thousand workers consume wood continuously and can cause significant damage within three to five years if untreated. Formosan termite colonies — which can exceed one million workers — are capable of severe damage within a year or two of establishment. Damage accumulates silently because it occurs inside structural members.

Termite swarming in Texas follows temperature and moisture triggers that vary by species and region. Eastern subterranean termites most commonly swarm in spring when soil temperatures warm. In warmer parts of Texas, swarms may occur from late winter through early summer. Formosan termites in Gulf Coast and tropical climates swarm in spring evenings. A licensed pest management professional can identify which species are active in your area of Texas.

Subterranean termites are attracted by cellulose in contact with soil — wood siding that reaches the foundation, form boards left in place after construction, mulch retained against the structure, and wood debris in crawl spaces. Moisture is a secondary attractant — wood softened by leaks or condensation is easier to consume and more detectable by foraging workers. Eliminating soil-to-wood contact and moisture sources reduces structural risk.

Active subterranean termite infestations are most commonly treated with liquid termiticide applications to the soil around and under the foundation, creating a treated zone that kills or repels foragers. Termite bait systems are an alternative approach that uses delayed-action toxicants carried back to the colony. Drywood termites may be treated with localized injection or whole-structure fumigation depending on infestation scope.

A termite bait station is a plastic housing installed in the soil at intervals around the structure perimeter. Inside is cellulose material that termites locate while foraging. When activity is detected, a delayed-action active ingredient is added. Workers carry the material back to the colony and distribute it to nestmates, eventually eliminating the colony. Bait systems require ongoing monitoring to function correctly.

Liquid termite treatment involves applying a termiticide to the soil around and beneath a structure's foundation — through trenching and rodding around the perimeter, injection through concrete slabs at regular intervals, and treatment beneath slabs where accessible. Repellent termiticides create a treated zone termites avoid; non-repellent termiticides are carried back to the colony by workers who contact the treatment zone.

Non-repellent liquid termiticides applied by licensed professionals typically maintain effectiveness in the soil for five to ten years under standard conditions, though soil type, moisture, and disturbance can affect longevity. Bait systems require ongoing monitoring and periodic replenishment. The specific duration depends on the products used, application conditions, and whether the soil treatment remains undisturbed.

Consumer-grade termite products are generally insufficient to protect a structure from active infestation. Effective liquid treatment requires rodding and trenching equipment to achieve uniform soil placement at depth. Improperly applied consumer products may kill surface foragers without establishing a protective treatment zone, creating a false sense of security while the infestation continues.

Subterranean termites cause an estimated $6 billion in structural damage annually in the United States. In severe infestations, termites hollow out floor joists, wall studs, and support beams from the inside, leaving intact-appearing surfaces that mask complete structural failure. Worst-case scenarios involve significant portions of structural framing needing replacement in addition to termite treatment.

Termites target cellulose, which is present in all wood species, though they show preferences for softwoods over hardwoods and for wood with elevated moisture content. Pressure-treated wood resists subterranean termite attack in soil contact, but the treated zone is limited to a few inches from the surface — termites can bridge treated wood with mud tubes to reach untreated wood above.

Mud tubes are tunnels constructed by subterranean termites from soil particles, feces, and saliva to maintain the moist, dark environment they require while traveling above ground. They appear as pencil-to-thumb-width tubes running along foundation walls, over concrete, or up wood framing. Flattened tubes over smooth surfaces and exploratory tubes on exterior walls are all termite mud tube types.