Termidor SC (fipronil 9.1%) is the most widely used professional termiticide in the United States and the gold standard for subterranean termite treatment in Arizona. Developed by BASF, Termidor works through a mechanism called the Transfer Effect — termites that contact the treated soil don't die immediately. Instead, they carry the fipronil on their bodies back to the colony, where they transfer it to nestmates through grooming and food sharing. This slow-acting transfer kills the entire colony, including the queen, rather than just the workers that contact the treatment zone. In independent studies, Termidor achieved 100% control of subterranean termite colonies within 90 days of treatment — a result no other termiticide has matched in head-to-head comparisons.

The Termidor Treatment Process

The Termidor treatment process for an Arizona home involves several steps. First, a licensed pest control technician performs a thorough inspection to identify active termite activity, mud tubes, and conducive conditions. Then, a continuous trench is dug around the perimeter of the foundation — typically 6 inches wide and 6 inches deep — and Termidor SC diluted to label specifications is applied to the trench at a rate of 4 gallons per 10 linear feet. Where concrete flatwork (patios, driveways, garage floors) meets the foundation, holes are drilled at 12-inch intervals and Termidor is injected under pressure to treat the soil beneath. The trench is then backfilled and the drill holes are patched. Interior treatments may be required where termite activity is found inside the structure — typically through drilled holes in the slab at expansion joints and plumbing penetrations. The entire process for a standard Arizona home takes 2–4 hours.

Prevention & Professional Treatment

Termidor provides residual protection in the soil for up to 10 years under typical Arizona conditions. The dry desert soil actually helps preserve the termiticide longer than in wetter climates. However, annual inspections are still recommended to verify the barrier is intact and to catch any new termite activity before it causes damage. Termidor is labeled for use by licensed pest control professionals only — it is not available to homeowners at retail. Pest Control Bros LLC is licensed to apply Termidor throughout Maricopa, Chandler, Mesa, Tempe, Gilbert, and Casa Grande. Call (520) 424-5244 for a free inspection and same-week service.