Reported Resistance Case(s)

Species: haematobia irritans

Order	Family	Common Name(s)	Group	Host
diptera	muscidae	horn fly	MED	livestock

Active Ingredient: pirimiphos-methyl

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP	CAS #: 29232-93-7	Shaugnessy Code: 108102

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G5520	1994	Unspecified	USA-- Arkansas	Steelman, C.D. , R.W. Mcnew, M.A. Brown, G. Tolley, and J.M. Phillips. (1994). Efficacy of Brahman Breeding in the Management of Insecticide-Resistant Horn Flies (Diptera:Muscidae) on Beef Cattle. Journal of Economic Entomology, 87(1) 7-14.

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