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: phenkapton

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP	CAS #: 2275-14-1	Shaugnessy Code: 335300

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G2102	1973	Field Evolved Resistance	Japan	Anon. 1973. (1973).
G690	1965	Field Evolved Resistance	Switzerland	Gasser 1965. (1965).
G691	1965	Field Evolved Resistance	United Kingdom	Legonski 1965. (1965).

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