Amulet C-L (cue-lure) and Amulet ME (methyl eugenol) molded paper fiber "attract-and-kill" dispensers containing fipronil were tested under Hawaiian weather conditions against Bactrocera cucurbitae (Coquillett) (melon fly) and Bactrocera dorsalis (Hendel) (oriental fruit fly), respectively. In paired tests (fresh versus weathered), C-L dispensers were effective for at least 77 d, whereas ME dis...

Fipronil, a phenyl-pyrazole insecticide, is often used in rice (Oryza sativa L.) production agriculture, with elevated runoff concentrations and loads having potential toxicological effects on downstream aquatic environments. This study evaluated two species of aquatic plants-broadleaf cattail (Typha latifolia L.) and powdery alligator-flag (Thalia dealbata Fraser ex Roscoe)-placed in series ag...

Fipronil and dieldrin are known to inhibit GABA receptors in both mammals and insects. However, the mechanism of selective toxicity of these insecticides between mammals and insects remains to be seen. One possible mechanism is that insect GABA receptors are more sensitive than mammalian GABAA receptors to fipronil and dieldrin. We examined differential actions of fipronil and dieldrin on GABA-...

An indirect competitive enzyme-linked immunosorbent assay (ELISA) was developed for the quantitative detection of fipronil in some environmental samples. Polyclonal fipronil antibodies were produced from rabbits immunized by hapten (fipronil) protein conjugate. The conjugate was prepared by activating the carboxylic groups of proteins; keyhole limpet hemocyanin (KLH) or bovine serum albumin (BS...

Dogs are easily infested with fleas, ticks, and other ectoparasites serving as vectors for transmitting bacterial, viral, and parasitic diseases. Therefore, the use of ectoparasiticides is inevitable and important. The present investigation was undertaken with two specific objectives: one, to evaluate the safety of fipronil and cyphenothrin in dogs after topical application of Parastar® Plus, a...

Fipronil insecticide dissipated in California rice fields, producing half-lives of 10.5 to 125 h in water and 44.5 to 533 h in soil, depending on the formulation applied and the resulting differences in water solubility. The major degradation products were desthiofipronil in water and fipronil-sulfide in soil, while the sulfone and amide were less abundant. Fipronil was photolyzed rapidly to de...

The stereoselective difference of chiral pesticide enantiomers is an important factor risk evaluation and the subject has received wide attention. In present work, enantioselective metabolism phenylpyrazole insecticides including fipronil, ethiprole flufiprole in rat liver microsomes was investigated vitro. result showed remarkable enantioselectivity for fipronil with EF values 0.11–0.58. metab...

Fipronil is a current use pesticide, widely used in many crops, commonly adsorbed to sediments of aquatic environments. The purpose this study was evaluate the biomarker responses and fipronil distribution pattern different matrixes (fish, sediment water) after juveniles P. lineatus exposure at two environmental concentrations (5.5 82 ?g kg ? ?1 ) fipronil-spiked sediments. levels oxidized prot...