Reported Resistance Case(s)

Species: rhipicephalus microplus

Order	Family	Common Name(s)	Group	Host
acari	ixodidae	southern/tropical cattle tick	MED	cattle

Active Ingredient: coumaphos oxon

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP	CAS #: 321-54-0	Shaugnessy Code: 636501

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G7243	2005	Field Evolved Resistance	Mexico-- Campeche-- Champoton	Li, A.Y., J.H. Pruett, R.B. Davey, and J.E. George. (2005). Toxicological and biochemical characterization of coumaphos resistance in the San Roman strain of Boophilus microplus (Acari: Ixodidae).. Pesticide Biochemistry and Physiology, 81 145-153.

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