Reported Resistance Case(s)

Species: spodoptera frugiperda

Order	Family	Common Name(s)	Group	Host
lepidoptera	noctuidae	fall armyworm	AG	cotton, grains, grasses, sugarcane

Active Ingredient: Bacillus thuringiensis Cry1Ab

MOA: Microbial disruptors of insect midgut membranes (includes transgenic crops), Bacillus thuringiensis (variety unstated)
Group: BAC	CAS #: 0	Shaugnessy Code: 0

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G23483	2025	Field Evolved Resistance	China-- Yunnan-- Yuanjiang	Zhang Z, Wu S, Long Y, Huang W, Bramlett M, Yang Y, Wu Y. (2025). Identification of SfABCC2 as the critical receptor for Cry1Fa and Cry1Ab in Spodoptera frugiperda via CRISPR-mediated gene knockouts.. Pestic Biochem Physiol, 213.
G20858	2020	Field Evolved Resistance	Brazil-- São Desidério-- Bahia	Boaventura D, Buer B, Hamaekers N, Maiwald F and Nauen R. (2020). Toxicological and molecular profiling of insecticide resistance in a Brazilian strain of fall armyworm resistant to Bt Cry1 proteins. Pest Management Science.
G19730	2014	Lab selected after field-evolved resistance**	Puerto Rico	Jakka, S. R. K., Knight, V. R., Jurat-Fuentes, J. L. (2014). Spodoptera frugiperda (J. E. Smith) with field-evolved resistance to Bt maize are susceptible to Bt pesticides. Journal of Invertebrate Pathology, 122 52-54.
G19381	2016	Field Evolved Resistance	Brazil-- Goias-- Montividiu	Omoto, Celso, Bernardi, Oderlei, Salmeron, Eloisa, Sorgatto, R., Dourado, P., Crivellari, A., Carvalho, R., Willse, A., Martinelli, S., and Head, G. (2016). Field-evolved resistance to Cry1Ab maize by Spodoptera frugiperda in Brazil. Pest Management Science 1727-1736.

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