Reported Resistance Case(s)

Species: tychius picirostris

Order	Family	Common Name(s)	Group	Host
coleoptera	curculionidae	clover seed weevil	AG	clover

Active Ingredient: malathion

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP	CAS #: 121755	Shaugnessy Code: 57701

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G22960	2024	Field Evolved Resistance	USA-- Oregon-- Linn Country	Tiwari, G., Kaur, N., Anderson, N. P., Tanner, K. C., Lightle, D. M., Willette, A. R., Otani, J. K., Jorgensen, A. M., Yoder, C., & Dorman, S. J. (2024). Field-evolved pyrethroid resistance in Tychius picirostris (Coleoptera: Curculionidae) populations in Oregon white clover seed crops. Journal of economic entomology, 117.
G22961	2024	Field Evolved Resistance	USA-- Oregon-- Linn Country	Tiwari, G., Kaur, N., Anderson, N. P., Tanner, K. C., Lightle, D. M., Willette, A. R., Otani, J. K., Jorgensen, A. M., Yoder, C., & Dorman, S. J. (2024). Field-evolved pyrethroid resistance in Tychius picirostris (Coleoptera: Curculionidae) populations in Oregon white clover seed crops. Journal of economic entomology, 117.
G22962	2024	Field Evolved Resistance	USA-- Oregon-- Linn Country	Tiwari, G., Kaur, N., Anderson, N. P., Tanner, K. C., Lightle, D. M., Willette, A. R., Otani, J. K., Jorgensen, A. M., Yoder, C., & Dorman, S. J. (2024). Field-evolved pyrethroid resistance in Tychius picirostris (Coleoptera: Curculionidae) populations in Oregon white clover seed crops. Journal of economic entomology, 117.
G22963	2024	Field Evolved Resistance	USA-- Oregon-- Linn Country	Tiwari, G., Kaur, N., Anderson, N. P., Tanner, K. C., Lightle, D. M., Willette, A. R., Otani, J. K., Jorgensen, A. M., Yoder, C., & Dorman, S. J. (2024). Field-evolved pyrethroid resistance in Tychius picirostris (Coleoptera: Curculionidae) populations in Oregon white clover seed crops. Journal of economic entomology, 117.
G22964	2024	Field Evolved Resistance	USA-- Oregon-- Linn Country	Tiwari, G., Kaur, N., Anderson, N. P., Tanner, K. C., Lightle, D. M., Willette, A. R., Otani, J. K., Jorgensen, A. M., Yoder, C., & Dorman, S. J. (2024). Field-evolved pyrethroid resistance in Tychius picirostris (Coleoptera: Curculionidae) populations in Oregon white clover seed crops. Journal of economic entomology, 117.
G22965	2024	Field Evolved Resistance	USA-- Oregon-- Linn Country	Tiwari, G., Kaur, N., Anderson, N. P., Tanner, K. C., Lightle, D. M., Willette, A. R., Otani, J. K., Jorgensen, A. M., Yoder, C., & Dorman, S. J. (2024). Field-evolved pyrethroid resistance in Tychius picirostris (Coleoptera: Curculionidae) populations in Oregon white clover seed crops. Journal of economic entomology, 117.

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