BACKGROUND To compare the effectiveness of 3 commercial gel bait formulations containing fipronil (Goliath(©) Cockroach Gel 0.05% AI), chlorpyrifos-A (Clean Bait(©) Gel, 2% AI), and chloropyrifos-B (Serpa(©) Gel 2% AI) against German cockroaches (Blattella germanica) when stored at 23(°)C and 30(°) C after treatment. METHODS Laboratory bioassays consisted of placing groups of fifteen cockroac...

63 Three soils (a silt loam, loamy sand, sandy loam) found in Mississippi and pure silica sand were treated with fipronil and bioassayed using eastern subterranean termites, Reticulitermes jlavipes. Soils were treated with aqueous solutions ofTermidor (fipronil) at concentrations of 0, 0.12, 0.25,2.5, 5.0 and 20.0 ppm (wt AI: wt soil) that brought the soils to 15% moisture. Estimated lethal con...

BACKGROUND Termiticides are applied at concentrations much higher than those used in agricultural settings. The longevity of fipronil has not yet been examined at the rates used for termite control, nor has the compound's movement in the soil been addressed. RESULTS Fipronil was detected in the eluates of treated soil cones, increasing initially and then decreasing to a steady concentration o...

Concerns over the role of pesticides affecting vertebrate wildlife populations have recently focussed on systemic products which exert broad-spectrum toxicity. Given that the neonicotinoids have become the fastest-growing class of insecticides globally, we review here 150 studies of their direct (toxic) and indirect (e.g. food chain) effects on vertebrate wildlife--mammals, birds, fish, amphibi...

The aim of this study was to characterize the mechanism of toxicity of fipronil on hepatocytes isolated from the rat and the effect of its biotransformation on the toxicological potential. The toxicity of fipronil was assessed by monitoring the oxygen consumption and mitochondrial membrane potential, intracellular ATP concentration, Ca 2+ homeostasis and cell viability. The cell viability was e...

The effect of fipronil-treated sand on digging behavior and mortality of red imported fire ant, Solenopsis invicta Buren, workers was examined in the laboratory. No-choice digging bioassays where fipronil-treated sand was the only available digging substrate were conducted on two colonies at fipronil concentrations of 0.00, 0.05, 0.10, 0.50, 1.00, 1.50, and 2.00 ppm. Workers dug into the fipron...

The speed of kill of a spot-on formulation of fipronil (Frontline Top Spot, Merial Limited, Duluth, GA) against adult cat fleas (Ctenocephalides felis) and brown dog ticks (Rhipicephalus sanguineus) was evaluated in dogs in a commercial laboratory setting. Forty dogs were allocated to 20 replicates of two based on sex and pretreatment flea counts. Within each replicate, dogs were randomly alloc...

Fipronil, a relatively new insecticide more recently developed than organophosphates and pyrethroids, has been detected in surface water draining from agricultural and urban-developed areas. This insecticide is primarily lost through subsurface and surface drainage from terrestrial areas where it has been applied. Invasive aquatic plants often need to be managed in these receiving water bodies ...