Reported Resistance Case(s)

Species: culex tarsalis

Order	Family	Common Name(s)	Group	Host
diptera	culicidae	western encephalitis mosquito	MED

Active Ingredient: chlorpyrifos-methyl

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP	CAS #: 5598130	Shaugnessy Code: 59102

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G2395	1974	Field Evolved Resistance	USA-- California	Apperson, C. S. and Georghious, G. P. (1974). Comparative resistance to insecticides in populations of three sympatric species of mosquitoes in the Coachella Valley of California.. J. Med. Entomol., 11 573-76.

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