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: formetanate

MOA: Acetylcholine esterase inhibitors, Carbamates
Group: CAR	CAS #: 23422539	Shaugnessy Code: 97301

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G4158	1984	Field Evolved Resistance	USA-- California	Croft, B. A., Miller, R. W., Nelson, R. D., and Westigard, P. H. (1984). Inheritance of early-stage resistance to formetanate and cyhexatin in Tetranychus urticae, Acarina: Tetranychidae.. J. Econ. Entomol., 77 574-78.
G2358	1974	Field Evolved Resistance	New Zealand	Ong, S. H. and Ballantyne, G. H. (1974). Acaricidal resistance and gentic affinities of some two spotted spider mite populations in New Zealand.. N. Z. J. Zool., 1 523-30.
G2359	1974	Field Evolved Resistance	United Kingdom	Cranham 1974b. (1974).

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