Reported Resistance Case(s)

Species: haematobia irritans

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

Active Ingredient: toxaphene

MOA: GABA-gated chloride channel antagonists, Cyclodiene organochlorines
Group: CYCLO	CAS #: 8001-35-2	Shaugnessy Code: 80501

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G780	1965	Field Evolved Resistance	USA	McDuffie, W.C. (1965). In: FAO 1967.

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