Thirty privately owned slab on grade structures, with defined subterranean termite infestations, were divided into three treatment groups. These included structures treated with 0.06% fipronil on both the exterior and interior; 0.06% fipronil applied to the exterior only; and 0.12% fipronil applied to the exterior only. Efficacy data was determined through regular inspections to determine the presence or absence of live termites in the structure. In addition, soil samples were taken at pre-treatment, 7 days, 3, 6, 9, and 12 months post-treatment. Tank samples were taken at the time of treatment. Chemical analysis was done via electron capture gas chromatography.
The results indicated that the full treatment with 0.06% fipronil was effective through 12 months. The partial (exterior only) treatments at either 0.06% or 0.12% fipronil were effective on termite infestations that were limited to exterior walls; however, at these rates, treatments were ineffective when the termites infesing the structure were associated interior areas such as bath traps, plumbing penetrations, or cracks in the slab.
Chemical analysis confirmed the presence of fipronil in both the tank mix and in the soil following application.
Species 1: Isoptera Rhinotermitidae Reticulitermes flavipes (Eastern Subterranean Termite)
Keywords: Subterranean, termites
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