Reported Resistance Case(s)

Species: therioaphis maculata

Order	Family	Common Name(s)	Group	Host
homoptera	aphididae	spotted alfalfa aphid	AG	alfalfa

Active Ingredient: parathion

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP	CAS #: 56382	Shaugnessy Code: 57401

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G162	1958	Field Evolved Resistance	USA-- California	Stern, V. M. and Reynolds, H. T. (1958). Resistance of the spotted alfalfa aphid to certain organophosphorus insecticides in southern Caifronia.. J. Econ. Entmol., 51 312-16.

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