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: cypermethrin

MOA: Sodium channel modulators, Pyrethroids, Pyrethrins, DDT
Group: PYR	CAS #: 52315078	Shaugnessy Code: 109702

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G22782	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.
G5828	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.
G5227	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.
G5246	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.
G4328	1985	Field Evolved Resistance	Egypt	Shaaban, A. M., Abo-Elghar, M. R., Abdel-Mohymen, M. R. and El-Malla, M. A. (1985). Resistance of the Egyptian cotton leafworm, Spodoptera littoralis to certain insecticides.. Z. Pflkrankh. Pflanzenschutz., 92 69-75.
G22785	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.
G22786	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.