Hexythiazox is an acaricide that induces toxicity in larvae of the two-spotted spider mite T. urticae and the European red mite P. ulmi (LC50s = 0.15-0.58 and 0.23-0.62 mg AI/L, respectively), as well as in the summer and winter eggs of P. ulmi (LC50s = 2.2 and 20 ppm, respectively).1,2 Hexythiazox is toxic to bluegill (L. macrochirus; LC50 = 3.2 mg/L) and D. magna (EC50 = 0.36 mg/L) but not rats (LD50 = >5,000 mg/kg).3 Formulations containing hexythiazox have been used in the control of mites in agriculture.
1.Nauen, R., Stumpf, N., Elbert, A., et al.Acaricide toxicity and resistance in larvae of different strains of Tetranychus urticae and Panonychus ulmi (Acari: Tetranychidae)Pest Manag. Sci.57(3)(2001) 2.Welty, C., Reissig, W.H., Dennehy, T.J., et al.Susceptibility to hexythiazox of eggs and larvae of european red mite (Acari: Tetranychidae)J. Econ. Entomol.81(2)586-592(1988) 3.Authority, E.F.S.Conclusion on the peer review of the pesticide risk assessment of the active substance hexythiazoxEFSA J.8(10)1722(2010)