Reported Resistance Case(s)

Species: dermacentor variabilis

Order	Family	Common Name(s)	Group	Host
acari	ixodidae	american dog tick	MED	livestock, dogs

Active Ingredient: DDT

MOA: Sodium channel modulators, Pyrethroids, Pyrethrins, DDT
Group: OCL	CAS #: 50293	Shaugnessy Code: 29201

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G259	1960	Field Evolved Resistance	USA-- Massachusetts	Ward 1960. (1960).

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