(E)-Fenpyroximate (Synonyms: Fenpyroximate, NNI-850)

(E)-Fenpyroximate is a phenoxypyrazole acaricide.¹ It is lethal to mobile adult phytophagous mites of the genera Tetranychidae, Eriophyidae, and Tarsonemidae and inhibits molting at immature stages. (E)-Fenpyroximate reduces the number of eggs laid per female and is lethal to female A. swirskii predatory mites.² It is also selectively lethal to worker over queen honey bees (LD₅₀s = 30 and >1,620 μg/g, respectively).³ (E)-Fenpyroximate induces cell death in marine flounder (P. olivaceus) gill cells (IC₅₀ = 800-1,250 nM) and is lethal to adult living flounder (LC₅₀ = 28.84 nM in seawater).⁴

1.Konno, T., Kuriyama, K., and Hamaguchi, H.Fenpyroximate (NNI-850), a new acaricideBrighton Crop Protection Conference, Pests and Diseases171-78(1990) 2.Lopez, L., Smith, H.A., Hoy, M.A., et al.Acute toxicity and sublethal effects of fenpyroximate to Amblyseius swirskii (Acari: Phytoseiidae)J. Econ. Entomol.108(3)1047-1053(2015) 3.Dahlgren, L., Johnson, R.M., Siegfried, B.D., et al.Comparative toxicity of acaricides to honey bee (Hymenoptera: Apidae) workers and queensJ. Econ. Entomol.105(6)1895-1902(2012) 4.Na, N., Guo, H., Zhang, S., et al.In vitro and in vivo acute toxicity of fenpyroximate to flounder Paralichthys olivaceus and its gill cell line FGAquat. Toxicol.92(2)76-85(2009)