Reported Resistance Case(s)

Species: haematobia irritans

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

Active Ingredient: tetrachlorvinphos Z-isomer

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP	CAS #: 22248-79-9	Shaugnessy Code: 83702

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G5521	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.
G5341	1991	Unspecified	USA-- Arkansas	Cilek, J.E., C.D. Steelman, and F.W. Knapp. (1991). Horn Fly (Diptera: Muscidae) Insecticide Resistance in Kentucky and Arkansas. Journal of Economic Entomology, 84(3) 756-762.
G4092	1984	Field Evolved Resistance	USA-- Georgia-- Ashburn	Sheppard, D. C. (1984). Fenvalerate and flucythrinate resistance in a horn fly, Haematobia irriatns, population.. J. Agric. Entomol., 1 305-10.

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