Skip to main content


APRD Survey

Dear Users:

We value your contribution to and use of the Arthropod Pesticide Resistance Database (APRD).

The APRD Team is conducting a Survey to gauge users experiences, our objective is to determine how the database enhances research, and to allow for users to provide feedback, suggestions and requests for potential improvements. Please take the anonymous survey using this link: Link to Survey

Thank you for your Participation,
David Mota-Sanchez
Arthropod Resistance Database Director


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: phosalone

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP CAS #: 2310170 Shaugnessy Code: 97701

Resistance Case(s)

Case Id Year of Report Type of Resistance Location Reference
G2348 1974 Field Evolved Resistance
United Kingdom Cranham, J. E. (1974). Resistance to organophosphates in red spider mite, Tetranychus urticae, from English hop gardens.. Ann. Appl. Biol., 78 99-111.
*The population was created solely by selection and/or genetic manipulation.
**The population was selected further in the laboratory after collection.