Formosan Subterranean Termite

The Formosan subterranean termite (Coptotermes formosanus) is the most aggressive and economically destructive termite species in the United States, and South Florida is one of its primary strongholds in the country. A single Formosan colony can contain several million workers — compared to 60,000–300,000 in a native subterranean termite colony — and can consume a pound of wood per day. They cause an estimated $1 billion in damage annually in the US.

How to Identify Formosan Subterranean Termite

Breeding & Habitat

Colonies grow slowly for 3–5 years, then expand rapidly. A mature queen lays 1,000+ eggs per day. Formosan colonies do not stay in one location — they forage underground across a territory up to 300 feet in diameter. Swarmers (alates) emerge on warm evenings in spring to establish new colonies.

Why This Species Is a Problem in South Florida

South Florida is in the highest-risk zone for Formosan termites in the continental US. The warm, humid climate allows year-round activity with no cold-season dormancy. Heavy ornamental tree populations — oaks, royal palms, and Ficus — provide above-ground nesting habitat adjacent to structures. Fort Lauderdale, Plantation, and older Boca Raton neighborhoods have some of the highest Formosan pressure in Florida.

How We Control Formosan Subterranean Termite

In-ground termite bait stations (Sentricon or Trelona) are the most effective long-term protection against Formosan termites. Stations are installed at regular intervals around the perimeter; workers carry bait back to the colony, eventually eliminating it. Liquid barrier treatments (termiticides) provide a chemical barrier but do not eliminate the colony. Annual inspections are essential — Formosan damage can become severe before visible signs appear.