Reported Resistance Case(s)

Species: rhipicephalus microplus

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

Active Ingredient: ethion

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP	CAS #: 563122	Shaugnessy Code: 58401

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G17049	2002	Field Evolved Resistance	Mexico-- Tabasco-- Emiliano Zapata	Cespedes, N.S., Vargas, M.S., Sanchez, H.F., and Vazquez, Z.G. (2002). First Case reported of Amitraz resistance in the cattle tick Boophilus microplus in Mexico. Tecnica Pecuaria en Mexico, 40(1) 81-92.
G4259	1984	Field Evolved Resistance	France	Brun, L. O., Wilson, J. T. and Nolan, J. (1984). Patterns of resistance in five samples of ethion-resistant cattle tick Boophilus microplus from New Caledonia.. Trop. Pest Management., 30 296-01.
G1588	1969	Field Evolved Resistance	Australia-- Queensland	Roulston, W. J. (1969). Acaricide resistance in the cattle tick, Boophilus microplus, in Austalia.. Proc. 2nd Int. Congr. Acarology, 1967, pp. 515-21.

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