Reported Resistance Case(s)

Species: spodoptera littoralis

Order	Family	Common Name(s)	Group	Host
lepidoptera	noctuidae	egyptian cotton leafworm, army worm	AG	alfalfa, cotton, potato, vegetables

Active Ingredient: chlorpyrifos

MOA: Acetylcholine esterase inhibitors, Organophophates
Group: OP	CAS #: 2921882	Shaugnessy Code: 59101

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G22783	2023	Field Evolved Resistance	Egypt-- Matrú-- Marsa Matruh	Ismail, S.M. (2023). Synergistic effects of suppress resistance of cypermethrin and chlorpyrifos in the cotton leafworm, Spodoptera littoralis (Boisduval) populations in Egypt. Int J Trop Insect Sci , 43.
G22784	2023	Field Evolved Resistance	Egypt-- Damietta-- Damietta	Ismail, S.M. (2023). Synergistic effects of suppress resistance of cypermethrin and chlorpyrifos in the cotton leafworm, Spodoptera littoralis (Boisduval) populations in Egypt. Int J Trop Insect Sci , 43.
G5826	1997	Unspecified	Egypt	Smafhe, G., and D. Degheele. (1997). Comparitive toxicity and tolerance for the ecdysteroid mimic tebufenozide in a laboratory and field strain of cotton leafworm (Lepidoptera: Noctuidae). Journal of Economic Entomology, 90(2) 278-282.
G5226	1990	Field Evolved Resistance	Israel	Ishaaya, I., and M. Klein. (1990). Response of Susceptible Laboratory and Resistant Field Strains of Spodoptera littoralis (Lepidoptera: Noctuidae) to Teflubenzuron. Journal of Economic Entomology, 83(1) 59-62.
G5245	1990	Field Evolved Resistance	Israel	Ishaaya, I. And Klein, M. (1990). Response of susceptible laboratory and resistant field strains of Spodoptera littoralis (Lepidoptera: Noctuidae) to teflubenzuron.. J. Econ. Entomol., 83 59-62.
G3963	1981	Field Evolved Resistance	Egypt	Mahran, A. A. (1981). Studies on insecticide resistance in insects.. M. Sc. Thesis, Univ. of Alexandria, Egypt.
G22787	2023	Field Evolved Resistance	Egypt-- Kafr El Shaikh-- Kafr El Shaikh	Ismail, S.M. (2023). Synergistic effects of suppress resistance of cypermethrin and chlorpyrifos in the cotton leafworm, Spodoptera littoralis (Boisduval) populations in Egypt. Int J Trop Insect Sci , 43.

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