Is Fipronil categorized as a non-repellent termiticide?

Fipronil is indeed categorized as a non-repellent termiticide. Non-repellent termiticides are substances that do not deter termites from coming into contact with them. Instead, they allow termites to walk across treated areas without detecting the chemical, which leads to ingestion or transfer of the active ingredient among the termite colony. This makes Fipronil effective in controlling termite populations, as it can eliminate not just the individuals that come into direct contact with it but also those that interact with those affected individuals, thereby impacting the entire colony.

The other options do not apply because they introduce either false conditions or qualifiers that do not accurately represent Fipronil's categorization. For instance, stating that it is only non-repellent in specific formulations or only for subterranean termites would limit its broader classification as a non-repellent termiticide without a proper basis in how the chemical works across varying scenarios and formulations.