Reported Resistance Case(s)

Species: panonychus ulmi

Order	Family	Common Name(s)	Group	Host
acari	tetranychidae	european red mite	AG	fruit trees

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
G3386	1977	Field Evolved Resistance	Australia-- New South Wales	Bower, C. C. (1977). European red mite -- apple pest in N.. S. W. Agric. Gaz. N. S. W., 88 40-41.
G2800	1975	Field Evolved Resistance	Germany	Englert, W. D. (1975). Akarizidresistenz bei Freiland populationen der Ostbaumspinnmilbe Panonychus ulmi (Koch) an Reben.. Weinberg Keller, 22 491-99.
G2666	1974	Field Evolved Resistance	Portugal	Anon. 1974a. (1974). Communication to FAO. Laboratorio de Fitofarmacologia, Oerias, Portugal.

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