Fitness costs of Cry1F resistance in two populations of fall armyworm, Spodoptera frugiperda (J.E. Smith), collected from Puerto Rico and Florida

Journal of Invertebrate Pathology
Vikash Dangal, Fangneng Huang

Abstract

The development of resistance in target pest populations is a threat to the sustainability of transgenic crops expressing Bacillus thuringiensis (Bt) proteins. Fall armyworm, Spodoptera frugiperda (J.E. Smith), is a major target pest of Bt maize in North and South America. This insect is the first target pest that has developed field resistance to Bt maize at multiple locations in these regions. The objective of this study was to assess the fitness costs associated with the Cry1F resistance in two populations of S. frugiperda collected from Puerto Rico (RR-PR) and Florida (RR-FL). In the study, fitness costs were evaluated by comparing survival, growth, and developmental time of seven populations of S. frugiperda on (1) non-Bt meridic diet and (2) non-Bt maize leaf tissue and non-Bt diet. The seven populations were RR-PR, RR-FL, a Bt-susceptible strain (Bt-SS), and four F1 populations developed from reciprocal crosses between Bt-SS and the two resistant populations. Biological parameters measured were neonate-to-adult survivorship, neonate-to-adult developmental time, 10day larval weight on non-Bt maize leaf tissue, pupal weight, and sex ratios. Results of the study show that the Cry1F resistance in both RR-PR and RR-FL was ass...Continue Reading

References

Jul 17, 2001·Proceedings. Biological Sciences·Y Carrière, B E Tabashnik
Feb 9, 2008·Nature Biotechnology·Bruce E TabashnikYves Carriére
Dec 11, 2008·Annual Review of Entomology·Aaron J GassmannBruce E Tabashnik
Feb 8, 2014·Journal of Invertebrate Pathology·Liping ZhangFangneng Huang
Sep 1, 2010·Evolutionary Applications·Yves CarrièreBruce E Tabashnik

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Citations

Jul 21, 2016·Current Opinion in Insect Science·Ana M VélezBlair D Siegfried
Oct 7, 2016·The Journal of Applied Ecology·Sean C Hackett, Michael B Bonsall
May 6, 2016·Pest Management Science·Oscar F Santos-AmayaEliseu José G Pereira
Nov 20, 2019·Insect Biochemistry and Molecular Biology·Debora BoaventuraRalf Nauen
Jul 6, 2017·Journal of Invertebrate Pathology·Binod AcharyaFangneng Huang

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