Reported Resistance Case(s)

Species: psylla pyricola

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

Active Ingredient: EPN

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP	CAS #: 2104645	Shaugnessy Code: 41801

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G2028	1972	Field Evolved Resistance	USA-- Oregon	Westigard, P. H. and Zwick, R. W. (1972). The pear psylla in Oregon.. Oreg. State Univ. Agric. Stn. Tech. Bull. 122, 22 pp..

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