Sentricon and Trelona are the two most widely used termite baiting systems in the United States, and they work in remarkably similar ways. Both use chitin synthesis inhibitors at the same 0.5% concentration, both are installed in underground stations around your home’s perimeter, and a two-year university study found no significant differences in effectiveness between them. The real differences come down to availability, access, and cost structure.
How Both Systems Work
Sentricon and Trelona both kill termite colonies the same way: by disrupting the molting process. Subterranean termites need to shed their exoskeletons periodically to grow. When they feed on bait containing a chitin synthesis inhibitor, they lose the ability to form a new exoskeleton and die during their next molt. Because foraging termites share food with the rest of the colony, the active ingredient spreads through the entire population, eventually collapsing it.
The systems differ in their specific active ingredients. Sentricon Always Active uses noviflumuron, while Trelona ATBS uses novaluron. Both belong to the same chemical class (benzoylphenyl ureas), both are formulated at 0.5% concentration, and the EPA classifies both as “reduced risk” compounds. In practical terms, they’re two versions of the same approach.
Bait Station Design
Sentricon stations contain a cellulose tube pre-loaded with Recruit HD bait. The “Always Active” label means the bait is in the station from day one, so termites can begin feeding as soon as they find the station. There’s no separate monitoring phase where a pest control operator has to check for termite activity and then swap in bait later.
Trelona ATBS stations use compressed cellulose wafers housed in a plastic cartridge. Each cartridge holds about 124 grams of bait material. Like Sentricon, the bait is present in the station from installation, so both systems are “always active” in that sense. The wafer format gives Trelona a slightly different physical profile underground, but research hasn’t shown this to affect termite feeding rates.
Effectiveness and Timeline
A two-year field study conducted by University of California researchers tested Sentricon, Trelona, and a third bait system side by side at multiple sites. The results were clear: no termite colony that fed on any of the three bait systems was ever detected again. All three eliminated colonies effectively.
The study also revealed what many pest control operators already know: baiting takes patience. Termites found some stations within six months, but the average interception time across all systems was 367 days. Of 180 bait stations installed, 44% had termite activity by the end of the two-year study period. There were no statistically significant differences between Sentricon and Trelona in how quickly termites found the stations or how effectively the colonies were eliminated.
This roughly one-year average wait time is worth understanding before you commit to a baiting system. If you have an active infestation causing visible damage right now, your pest control operator may recommend a liquid soil treatment for faster results, with bait stations added for long-term colony elimination and monitoring.
The Biggest Practical Difference: Who Can Buy Them
This is where the two systems diverge most sharply. Sentricon is restricted to licensed professionals only. You cannot legally purchase Sentricon stations as a homeowner. Corteva Agriscience, the manufacturer, requires installation and monitoring by a Certified Sentricon Specialist. If you see Sentricon stations sold online through unofficial channels, they’re likely expired or illegitimate.
Trelona, manufactured by BASF, is primarily marketed to professionals but is available for homeowner purchase online in most states. You can buy Trelona ATBS kits directly and install them yourself, though you should check your state’s regulations before ordering. This makes Trelona the only viable option if you want to handle termite baiting as a DIY project.
Cost Considerations
Because Sentricon requires a certified professional for every step, your costs include the initial installation, periodic inspections, and bait replenishment, typically structured as an annual service agreement. The total depends on your home’s size and perimeter length, but you’re paying for ongoing professional monitoring as part of the package.
Trelona gives you two pricing paths. Hiring a pest control company to install and monitor Trelona stations will cost roughly the same as a Sentricon service agreement, since labor and inspections make up most of the expense either way. The DIY route with Trelona is significantly cheaper in dollar terms, since you’re only paying for the stations and replacement bait cartridges. The tradeoff is that you take on the responsibility of checking stations regularly, replacing consumed bait, and correctly interpreting what you find.
Which System to Choose
If you’re hiring a pest control company regardless, the choice between Sentricon and Trelona comes down to what your local operators offer and how they price their contracts. The two systems perform equivalently in field conditions, so neither gives you a meaningful advantage in termite elimination. Ask about the inspection schedule, what’s included in the annual renewal, and whether the contract covers retreatment if termites return.
If you want to manage termite protection yourself, Trelona is your only real option between these two. The stations are straightforward to install: dig a hole near the foundation, place the station flush with the ground, and check it on a regular schedule. Keep in mind that the average wait for termite contact is about a year, so you’ll need to be patient and consistent with inspections rather than assuming a lack of visible activity means the system isn’t working.
For homes with active infestations, the roughly 367-day average interception time for both systems means baiting alone may not be fast enough. In those situations, a combination approach, liquid barrier treatment for immediate protection plus a bait system for long-term colony elimination, is a common and effective strategy regardless of which bait brand you choose.