Reported Resistance Case(s)

Species: psylla pyricola

Order	Family	Common Name(s)	Group	Host
homoptera	psyllidae	pear psylla	AG	pear

Active Ingredient: malathion

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP	CAS #: 121755	Shaugnessy Code: 57701

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G2474	1974	Field Evolved Resistance	USA-- Washington	Burts, E. C. (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.