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: 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
G5766	1996	Unspecified	Greece	Tsagkarakou, A., M. Navajas, J. Lagnel, J. Gutierrez, and N. Pasteur. (1996). Genetic variability in teranychus urticae (Acari: Tetranychidae) from Greece : Insecticide resistance and Isozymes. Journal of Economic Entomology, 89(6) 1354-1358.
G4083	1983	Field Evolved Resistance	France	Brun, L. O., Edge, V. E. and Gutierrez, J. (1983). The occurrence of five Tetranychus spp.. (Acarine: Tetranychidae) in New Caledonia and their response to acaricides. Trop. Pest Management., 29 371-77.
G3514	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.
G2335	1974	Field Evolved Resistance	Poland	Lakocy, A. (1974). Communication to FAO.
G2101	1973	Field Evolved Resistance	Australia-- New South Wales	Unwin, B. (1973). Chemical resistance in populations of Tetranychus urticae (Koch) (Acarina: Tetranychidae) from apple orchards in New South Wales, Australia.. J. Aust. Entomol. Soc., 12 59-67.
G1361	1968	Field Evolved Resistance	South Africa	Myburgh, G. (1968). In: FAO 1969.

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