Yes, according to a 1999-2001 Louisiana survey published through the LSU repository, which lists Lafayette Parish among the parishes where Formosan subterranean termites are established. That is a statement about the parish, not about any single property. This guide explains what the survey says, how the species differs from others a homeowner may know and what questions to ask an inspector.
Key takeaways
- A 1999-2001 Louisiana survey lists Lafayette Parish among the places where Formosan subterranean termites are established.
- The survey is a parish-level statement, so every property needs its own inspection.
- Formosan colonies can forage well beyond the damage they cause, so soil routes matter as much as wood.
- The inspection should look for soil contact, galleries in framing and the swarm trail, not only visible damage.
- Ask an inspector whether the Formosan pattern was checked, and what would show the treatment is working.
What does the survey actually say?
It says the species is established in Lafayette Parish, as one of the parishes where Formosan subterranean termites were found. The survey was conducted over 1999 to 2001 and is recorded in the LSU repository.
The repository title is Practical considerations of the Formosan subterranean termite in Louisiana: a 50-year-old problem. The phrase 'established' is the important word. It means the species has a population that reproduces in the parish, not that a particular house has been found to have a colony.
A homeowner should read the survey as a reason to look for the species, not as a verdict on a property. The survey does not say how many colonies exist in the parish, where they are, or how fast they spread, and this guide will not guess at those figures.
How is the Formosan termite different from the others?
Formosan subterranean termites are known for large colonies and for foraging a long distance from the nest, and they can feed in wood that never touches the ground. Those traits shape how an inspection is planned.
Subterranean termites in general live in soil and reach wood through it. A Formosan colony can build routes that cover a wider area of soil, which means the damage may be reached from a long way off, and the visible wood may be the last part of the house to show a problem.
The species also builds galleries inside framing that looks sound from the room side. A board that rings true when tapped can hold galleries inside, so a probe is more useful than a glance. The practical result is that a Formosan inspection looks at the soil line, the framing and the swarm trail together.
| Evidence | Where to look | What it suggests |
|---|---|---|
| Mud tubes | Piers, slab edge, block walls, porch footings | A route between soil and wood is in use |
| Soil bridges | Beds, steps and fence posts touching the wall | The soil line has been crossed or can be crossed |
| Sounded wood | Sill plates, joists, door frames, plumbing runs | Galleries may be inside a board that looks sound |
| Swarm trail | Porch lights, window sills, door thresholds | A mature colony is nearby and releasing reproductives |
| Moisture | Crawl space floor, slab edge, wood at the sill | Damp wood and soil favor a colony and suit the route |
What should the inspection check in a Lafayette Parish home?
The inspection should check for the Formosan pattern as a matter of course, which means the soil side, the structure side and the swarm evidence, with the findings written down by location.
The inspection begins outside. The foundation, the piers, the slab edge and the steps are walked, and every point where soil meets the structure is recorded. Mulch, stacked wood and cardboard against the wall are noted, since they give a colony cover and a route.
Inside, the crawl space or the slab edge is checked, and the sill plates, joists and framing that can be reached are probed. Moisture is measured where the wood feels damp. The report should state which areas were not reached, because a Formosan colony can hide in a wall that was never opened.
What questions should a homeowner ask?
Ask whether the inspection looked for the species specifically, how the soil side was checked, what the report says it could not reach and what would show that a treatment is working.
Ask whether the inspector looked for Formosan termites as well as the native species, and how the soil and the structure were each checked. A good answer describes the method, not only the result.
Ask what would show the plan is working. The answer should describe the next check, what it will look for and when it will happen. A plan without a follow-up date is not a plan.
What does the parish-level finding mean for a homeowner?
It means a homeowner in the parish should treat Formosan termites as a credible possibility and plan the inspection and the monitoring with that in mind, without assuming the house has a colony.
The owner-occupied share in Lafayette Parish is 65.5 percent, according to the 2020-2024 American Community Survey figures, and the city's share is 53.1 percent. Most of the decisions about inspections and treatment are made by the person who lives in the house, so the finding is best used as a checklist for that person.
A homeowner who has a swarm, a mud tube or a sounded beam should not wait for the next scheduled visit. The survey is the reason to take the sign seriously, and the inspection is the step that answers the question for the house.
How do Formosan colonies spread and why does that matter?
Formosan colonies can forage a long way from the nest and build routes through soil and wood. The spread is the reason a treatment is judged by the whole colony's reach and not only by the damage that has been seen.
A colony that produces swarmers in one spot is usually working over a wider area than the house shows. Workers search out food and build tunnels through the soil, and they can find a route into a structure from a point the homeowner would not expect, such as a tree base, a buried stump or a fence line.
The practical point is that a single visible tube is evidence of a route that may be part of a larger pattern. An inspection that records each tube and each soil bridge, and that follows the line between them, gives the treatment a better chance of reaching the part of the colony that matters.
Treatment or monitoring: how is the choice made?
A treatment is chosen against the inspection. A soil barrier suits activity that comes up from the ground, a bait system suits a colony that can be reached through its foraging workers, and monitoring alone may suit a house with no evidence of activity. The plan should say which applies and why.
A soil barrier is placed in the ground around the foundation and along the routes the colony uses. Its quality depends on how thoroughly the soil is treated and how the gaps at pipes and slab cracks are closed. A barrier with a gap is a barrier with a route.
A bait system uses stations placed in the soil. Workers carry a slow-acting material back to the colony, which is why bait is used where the colony is large or hard to reach from the surface. Monitoring alone suits a house with no sign of activity and a clear reason to keep watching, such as a swarm nearby. Each method has a log, and the log is what decides whether the method keeps going.
What can a homeowner do between the survey and an inspection?
The homeowner can clear the foundation, keep wood and cardboard away from the wall, fix the drips and leaks that keep the soil damp and keep a dated note of any sign. None of these steps replaces an inspection, but each one makes the inspection more useful.
Clearing the foundation means moving mulch back from the wall to the distance the AgCenter advises, which is 8 to 12 inches. Moving stacked wood and boxes off the soil at the wall removes the cover a colony uses to approach the house unseen.
Fixing the water is the other half. An outdoor spigot that drips, a downspout that discharges against the wall and a roof or pipe leak all keep the soil damp at the foundation, and damp soil is where a colony is easiest to keep going. The prevention service lists those repairs and names who should carry out each one.
What should a buyer or a new owner ask about a Formosan history?
A buyer should ask for any inspection and treatment record, any warranty and its terms, the date of the last check, and whether any swarm or tube was seen. The answers say more about the house than a single visit does.
Ask for the written record of earlier inspections and any treatments. A record shows the method, the places reached and the follow-up dates, and it is the best evidence of what was done.
Ask about the warranty and its terms, and whether it transfers. The terms decide what is covered and for how long, and a buyer should read them before relying on them. The inspection should note any gap in the record, so the buyer knows which part of the history is unknown.
What a homeowner can learn from the parish survey without guessing
The survey supports one clear conclusion for a homeowner: the species is a real possibility in the parish, so an inspection should look for it. It does not support a conclusion about a particular street, house or number of colonies.
A careful reader keeps the two levels apart. The parish-wide finding justifies the question. The house-level answer comes only from the inspection of that house. Treating the survey as a verdict on a property goes beyond what the survey says, and treating it as irrelevant ignores a documented finding.
The most useful thing to take from the survey is the habit it encourages: look at the soil line, the framing and the swarm trail together, and write down what was seen.
Frequently asked questions
Does the survey mean my house has Formosan termites?
No. The survey is a statement about the parish. Only an inspection of the house can say whether a colony is present there.
How can I tell Formosan termites from other termites?
The insects are difficult to tell apart by eye for most people. The inspector can take a sample and identify it, and the swarm evidence and the pattern of the routes help as well.
Is there a Formosan treatment that is different from the others?
The approach is chosen against the inspection. A soil barrier, a bait system or a combination can each suit a particular colony, and the plan should say why one is chosen.
Where can I read the survey itself?
The survey is in the LSU repository under the title Practical considerations of the Formosan subterranean termite in Louisiana.
Sources
- LSU repository, Practical considerations of the Formosan subterranean termite in Louisiana: a 50-year-old problem
- LSU AgCenter, termite pages for Lafayette Parish
This guide is general information for Lafayette Parish homeowners, not a substitute for an on-site inspection. Prices are estimates. See our disclaimer.