Reported Resistance Case(s)

Species: tetranychus urticae

Order	Family	Common Name(s)	Group	Host
acari	tetranychidae	twospotted spider mite	AG	cotton, fruits, vegetables, walnut, ornamentals

Active Ingredient: mephosfolan

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP	CAS #: 950-10-7	Shaugnessy Code: 268310

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G3513	1979	Field Evolved Resistance	United Kingdom	Muir, R. C. and Cranham, J. E. (1979). Resistance to pesticides in damson-hop aphid and red spider mite on English hops.. Proc. Br. Crop Prot. Conf. Pests Dis., 1 161-67.

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