Reported Resistance Case(s)

Species: psylla pyricola

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

Active Ingredient: azinphos-methyl

MOA:	Acetylcholine esterase inhibitors, Organophophates
Group:	OP CAS #: 86500 Shaugnessy Code: 58001

Resistance Case(s)

Case Id	Year of Report	Location	Reference
	1984	USA -- Utah	Davis, D.W. (1984). Personal communication.
	1974	USA -- New England	Jensen, G.L. (1974). Communication to FAO.
	1974	USA -- Michigan	Howitt, A.J. (1974). Communication to FAO.
	1972	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.
	1965	USA -- Washington	Harries, F. H. and Burts, E. C. (1965). Insecticide resistance in the pear psylla (P. pyricola Forster.). J. Econ. Entomol., 58, 172-73.
	1965	Canada -- British Columbia	McMullen, R.C. (1965). In: FAO 1967.