Reported Resistance Case(s)

Species: rhipicephalus microplus

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

Active Ingredient: chlorfenvinphos

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP	CAS #: 470906	Shaugnessy Code: 84101

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G17032	2000	Field Evolved Resistance	Colombia-- Santander-- Socorro	Benavides, E., Rodriguez, J. L., and Romero, A. (2000). Isolation and Partial Characterization of the Montecitos Strain of Boophilus microplus (Canestrini, 1877) Multiresistant to Different Acaricides. Annals of the New York Academy of Sciences, 916 668-671.
G529	1964	Field Evolved Resistance	Australia-- Queensland	Shaw, R. D. and Malcolm, H. A. (1964). Resistance of Boophilus microplus to organophosphours insecticides.. Vet. Rec., 76 210-11.

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