Reported Resistance Case(s)

Species: tetranychus urticae

Order	Family	Common Name(s)	Group	Host
acari	tetranychidae	twospotted spider mite	AG	cotton, fruits, vegetables, walnut, ornamentals

Active Ingredient: bifenazate

MOA: Unknown Mode of Action (general), Undetermined MOA
Group: MISC	CAS #: 149877-41-8	Shaugnessy Code: 586

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G23602	2025	Field Evolved Resistance	Turkey-- Izmir	Demirci B, Söylemezoğlu G, Van Leeuwen T, Toprak U, İnak E. (2025). Monitoring and molecular mechanisms of resistance to complex III inhibitors in Tetranychus urticae populations from Türkiye. Pestic Biochem Physiol.
G23596	2025	Field Evolved Resistance	Turkey-- Antalya	Demirci B, Söylemezoğlu G, Van Leeuwen T, Toprak U, İnak E. (2025). Monitoring and molecular mechanisms of resistance to complex III inhibitors in Tetranychus urticae populations from Türkiye. Pestic Biochem Physiol.
G23597	2025	Field Evolved Resistance	Turkey-- Antalya	Demirci B, Söylemezoğlu G, Van Leeuwen T, Toprak U, İnak E. (2025). Monitoring and molecular mechanisms of resistance to complex III inhibitors in Tetranychus urticae populations from Türkiye. Pestic Biochem Physiol.
G23598	2025	Field Evolved Resistance	Turkey-- Antalya	Demirci B, Söylemezoğlu G, Van Leeuwen T, Toprak U, İnak E. (2025). Monitoring and molecular mechanisms of resistance to complex III inhibitors in Tetranychus urticae populations from Türkiye. Pestic Biochem Physiol.
G23599	2025	Field Evolved Resistance	Turkey-- Antalya	Demirci B, Söylemezoğlu G, Van Leeuwen T, Toprak U, İnak E. (2025). Monitoring and molecular mechanisms of resistance to complex III inhibitors in Tetranychus urticae populations from Türkiye. Pestic Biochem Physiol.
G23601	2025	Field Evolved Resistance	Turkey-- Ankara	Demirci B, Söylemezoğlu G, Van Leeuwen T, Toprak U, İnak E. (2025). Monitoring and molecular mechanisms of resistance to complex III inhibitors in Tetranychus urticae populations from Türkiye. Pestic Biochem Physiol.
G17138	2014	Field Evolved Resistance	China-- Beijing-- Changping	Tang, X., Zhang, Y., Wu, Q., Xie, W., and Wang, S. (2014). Stage-Specific Expression of Resistance to Different Acaricides in Four Field Populations of Tetranychus urticae (Acari: Tetranychidae). Journal of Economic Entomology, 107(5) 1900-1907.
G17139	2014	Field Evolved Resistance	China-- Beijing-- Haidian	Tang, X., Zhang, Y., Wu, Q., Xie, W., and Wang, S. (2014). Stage-Specific Expression of Resistance to Different Acaricides in Four Field Populations of Tetranychus urticae (Acari: Tetranychidae). Journal of Economic Entomology, 107(5) 1900-1907.
G17137	2014	Field Evolved Resistance	China-- Beijing-- Huairou	Tang, X., Zhang, Y., Wu, Q., Xie, W., and Wang, S. (2014). Stage-Specific Expression of Resistance to Different Acaricides in Four Field Populations of Tetranychus urticae (Acari: Tetranychidae). Journal of Economic Entomology, 107(5) 1900-1907.
G17129	2014	Field Evolved Resistance	China-- Beijing-- Haidian	Tang, X., Zhang, Y., Wu, Q., Xie, W., and Wang, S. (2014). Stage-Specific Expression of Resistance to Different Acaricides in Four Field Populations of Tetranychus urticae (Acari: Tetranychidae). Journal of Economic Entomology, 107(5) 1900-1907.
G15090	2013	Field Evolved Resistance	Cyprus-- Arediou	Vassiliou, V. A., and Kitsis, P. (2013). Acaricide resistance in Tetranychus urticae (Acari: Tetranychidae) populations from cyprus. Journal of Economic Entomology, 106 1848-1854.
G17113	2014	Lab selected*	China-- Shandong-- Tai'an	Tang, X., Zhang, Y., Wu, Q., Xie, W., and Wang, S. (2014). Stage-Specific Expression of Resistance to Different Acaricides in Four Field Populations of Tetranychus urticae (Acari: Tetranychidae). Journal of Economic Entomology, 107(5) 1900-1907.
G17112	2014	Lab selected*	China-- Shandong-- Tai'an	Tang, X., Zhang, Y., Wu, Q., Xie, W., and Wang, S. (2014). Stage-Specific Expression of Resistance to Different Acaricides in Four Field Populations of Tetranychus urticae (Acari: Tetranychidae). Journal of Economic Entomology, 107(5) 1900-1907.
G9050	2009	Field Evolved Resistance	Belgium-- Ghent	Van Nieuwenhuyse, P., Van Leeuwen, T., Khajehali, J., Vanholme, B., and Tirry, L. (2009). Mutations in the mitochondrial cytochrome b of Tetranychus urticae Koch (Acari: Tetranychidae) confer cross-resistance between bifenazate and acequinocyl. Pest Management Science, 65 404-412.
G9045	2009	Lab selected after field-evolved resistance**	Germany	Van Nieuwenhuyse, P., Van Leeuwen, T., Khajehali, J., Vanholme, B., and Tirry, L. (2009). Mutations in the mitochondrial cytochrome b of Tetranychus urticae Koch (Acari: Tetranychidae) confer cross-resistance between bifenazate and acequinocyl. Pest Management Science, 65 404-412.
G9046	2009	Lab selected after field-evolved resistance**	Netherlands-- Nieuwveen	Van Nieuwenhuyse, P., Van Leeuwen, T., Khajehali, J., Vanholme, B., and Tirry, L. (2009). Mutations in the mitochondrial cytochrome b of Tetranychus urticae Koch (Acari: Tetranychidae) confer cross-resistance between bifenazate and acequinocyl. Pest Management Science, 65 404-412.
G9047	2009	Lab selected after field-evolved resistance**	Netherlands-- Hoek van Holland	Van Nieuwenhuyse, P., Van Leeuwen, T., Khajehali, J., Vanholme, B., and Tirry, L. (2009). Mutations in the mitochondrial cytochrome b of Tetranychus urticae Koch (Acari: Tetranychidae) confer cross-resistance between bifenazate and acequinocyl. Pest Management Science, 65 404-412.
G9048	2009	Lab selected after field-evolved resistance**	Netherlands-- Hoek van Holland	Van Nieuwenhuyse, P., Van Leeuwen, T., Khajehali, J., Vanholme, B., and Tirry, L. (2009). Mutations in the mitochondrial cytochrome b of Tetranychus urticae Koch (Acari: Tetranychidae) confer cross-resistance between bifenazate and acequinocyl. Pest Management Science, 65 404-412.
G9049	2009	Lab selected after field-evolved resistance**	Netherlands-- Tuil	Van Nieuwenhuyse, P., Van Leeuwen, T., Khajehali, J., Vanholme, B., and Tirry, L. (2009). Mutations in the mitochondrial cytochrome b of Tetranychus urticae Koch (Acari: Tetranychidae) confer cross-resistance between bifenazate and acequinocyl. Pest Management Science, 65 404-412.
G7286	2005	Unspecified	Belgium	Van Leeuwen, T., Pottelberge, S.V., Tirry, L. (2005). Comparative acaricide susceptibility and detoxifying enzyme activties in field-collected resistant and susceptible strains of Tetranychus urticae.. Pest Management Science, 61 499-507.
G23600	2025	Field Evolved Resistance	Turkey-- Antalya	Demirci B, Söylemezoğlu G, Van Leeuwen T, Toprak U, İnak E. (2025). Monitoring and molecular mechanisms of resistance to complex III inhibitors in Tetranychus urticae populations from Türkiye. Pestic Biochem Physiol.

*The population was created solely by selection and/or genetic manipulation.
**The population was selected further in the laboratory after collection.