Reported Resistance Case(s)

Species: phorodon humuli

Order	Family	Common Name(s)	Group	Host
homoptera	aphididae	hop aphid	AG	hop, plum

Active Ingredient: methidathion

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP	CAS #: 950378	Shaugnessy Code: 100301

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G3971	1981	Field Evolved Resistance	Czechoslovakia	Hrdy, I. And Kriz, J. (1981). Insecticide resistance spectrum in Cxechoslovak populations of the hop aphid Phorodon humuli.. 10BC/WPRS Bull., 4(3) 29-39.
G3972	1981	Field Evolved Resistance	United Kingdom	Muir, R. C. and Cranham, J. E. (1981). Resistance to pesticides in damson-hop aphid and red spider mite on English hops.. IOBC/WPRS Bull., 4 11-15.
G2564	1974	Field Evolved Resistance	Austria	Russ, K. (1974). Communication to FAO.

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