Sentricon is a termite baiting system installed around the perimeter of a building to eliminate subterranean termite colonies. Rather than creating a chemical barrier in the soil, it uses bait stations that termites feed on and carry back to their colony, eventually killing it from the inside out. It’s the most widely used termite bait system in the United States and is only available through licensed pest control professionals.
How the Bait System Works
A pest control technician installs plastic bait stations in the ground at intervals of 20 feet or less around your home’s foundation. Each station contains a cellulose tube laced with noviflumuron at a concentration of 0.5%. Cellulose is essentially processed wood fiber, which is exactly what termites are looking for. The stations don’t attract termites. Instead, foraging worker termites stumble upon them during their normal underground tunneling.
Once termites find a station and begin feeding, the noviflumuron disrupts their ability to molt. Termites have exoskeletons, so they need to shed and regrow their outer shell periodically as they mature. When noviflumuron blocks that process, the termites die. But the chemical works slowly by design. Worker termites that consume the bait share it with nestmates who never leave the colony, including soldiers, reproductive members, and eventually the queen. When enough of the colony has been exposed, the entire colony collapses.
The current version, called Sentricon Always Active, comes pre-loaded with bait from the moment of installation. Earlier versions used plain wood monitors that had to be swapped for bait once termite activity was detected, which added delays. The always-active design means the bait is in place and ready to be consumed from day one.
Which Termites It Targets
Sentricon is designed for subterranean termites, the group considered the most destructive wood-damaging pests in the world. This includes both native subterranean species and Formosan subterranean termites, an especially aggressive species common in the southeastern U.S. and Hawaii. The system works because these termites live in underground colonies and send workers through the soil to find food, which is how they encounter the bait stations.
Drywood termites are a different story. They live entirely inside the wood they eat and don’t forage through soil, so they would never encounter an in-ground bait station. If your termite problem involves drywood species, Sentricon isn’t the right solution.
How Long It Takes to Work
Baiting is not a quick fix. Unlike a liquid soil treatment that creates an immediate chemical barrier, Sentricon relies on termites finding the stations, feeding on the bait, and spreading it through their colony over time. Colony elimination can take several months, and the exact timeline depends on factors like colony size, soil temperature (termites are more active in warm weather), and how quickly foragers locate the stations. The system is designed as a long-term approach to termite control rather than an emergency response.
That said, the bait begins working as soon as termites start feeding. You just won’t see immediate results the way you might with a liquid treatment that kills termites on contact at the treatment zone.
Sentricon vs. Liquid Soil Treatments
The main alternative to a baiting system is a liquid termiticide applied to the soil around and beneath your foundation. These products create a treated zone that termites encounter while tunneling. Some liquid termiticides are repellent, driving termites away from the structure. Others, like those containing fipronil, are non-repellent: termites pass through the treated soil without detecting it, pick up the chemical, and transfer it to other colony members.
Both approaches can be effective, but they work differently and suit different situations:
- Speed: Liquid treatments provide faster protection because the chemical barrier is in place as soon as the application dries. Baiting takes longer since it depends on termite foraging behavior.
- Colony elimination: Bait systems are specifically designed to destroy the entire colony. Liquid barriers primarily protect the structure, though non-repellent products can also reduce colony populations over time.
- Structural complications: Liquid treatments sometimes require drilling through concrete slabs, finished basement walls, or tiled floors to reach the soil underneath. Baiting avoids all of that because the stations sit in the ground outside the building.
- Environmental concerns: If your home has a foundation drain near a pond or creek, a well or cistern under or close to the house, or HVAC ducts running beneath a slab, a liquid treatment may be impractical or even prohibited by local regulations. Bait stations sidestep these issues.
What It Costs
For an average U.S. home, initial Sentricon installation runs between $1,500 and $3,800. That covers the inspection, station placement, and the first round of bait. After installation, you’ll pay for an annual renewal contract that keeps the warranty active and covers regular monitoring visits. Renewal fees typically land at $300 to $500 per year for native subterranean termite coverage, and $400 to $700 in areas with Formosan termites.
Over a 10-year span, the total cost usually falls between $5,000 and $7,500. That ongoing expense is one of the key differences from liquid treatments. According to NC State Extension, renewal contracts for baiting systems typically cost two to four times more than renewal contracts for liquid treatments because bait stations require more frequent monitoring, sometimes quarterly, compared to the single annual inspection common with liquid-treated homes. The tradeoff is continuous, active protection rather than a one-time application that degrades over the years.
Professional Installation Only
You cannot buy Sentricon and install it yourself. The system is restricted to Certified Sentricon Specialists, pest control professionals who have been trained and authorized by the manufacturer, Corteva Agriscience. A specialist handles the initial property inspection, determines station placement, and returns on a scheduled basis to check stations for termite activity and replace bait that has been consumed.
Stations need to be inspected at least once per year, though many contracts include quarterly visits. Bait is replaced when it shows signs of damage or when more than a third of it has been eaten. This ongoing professional monitoring is part of what you’re paying for with the annual renewal, and it’s what keeps the system functioning as a continuous termite defense rather than a one-time treatment.