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Under the European Union Biocidal Products Regulation repellents are classified as biocides, and are subject to efficacy studies. To facilitate testing of repellents for product registration the EU has provided technical guidelines. The guidelines leave uncertainties as to how efficacy should be exa...

Currently, there is evidence of Triatoma infestans Klug, 1834 populations from southern Bolivia and northern Argentina with high levels of resistance to pyrethroids. In this study we characterized the susceptibility levels of 37 Triatominae populations to deltamethrin. The bioassays were performed b...

Altriset™ (18.4% SC, Chlorantraniliprole) exhibited delayed mortality in termites both in topical and limited exposure bioassays. When exposed for as low as 5 minutes on sand treated at =25 ppm, worker mortalities reached >90% by day 5. Termites behaved normally (walking, grooming etc.) for sever...

Field strain male German cockroaches,Blattella germanica (L.), considered “resistant” to fipronil by standard topical application methodology, were found to readily consume a novel 0.03% fipronil gel bait and succumb. Although a simple method, valid for contact sprays or residual deposits, topical a...

In a field population (RHA, Roanoke VA, USA) of Blattella germanica a decline in the efficacy of hydramethlynon has been documented for eight years. In 1987 >85% reduction of apartment infestations was achieved 4 wk after application, in 1990 reduction declined to 73%, and in 1995 reduction declined...