Susceptibility of Cry1F-Resistant Fall Armyworm, Spodoptera frugiperda, to Cotton Expressing Pyramided Bt Toxins

Tuesday, March 17, 2015: 4:27 PM
Magnolia G (Beau Rivage Resort & Casino)
Sebe Brown , Macon Ridge Research Station, Louisiana State University, Winnsboro, LA
Shelby Williams , Department of Entomology, Louisiana State University, Winnsboro, LA
Fangneng Huang , Department of Entomology, Louisiana State University, Baton Rouge, LA
David L. Kerns , Macon Ridge Research Station, Louisiana State University, Winnsboro, LA
Fall armyworms resistant to Cry1F Bt toxin were evaluated for resistance to pyramided Bt cotton including: Bollgard II, Widestrike, Twinlink, Twinlink Plus and Widestrike 3 technologies.  Cry1F resistant FAW demonstrated the ability to survive on Widestrike (Cry1Ac + Cry1F) cotton leaves and squares, but were highly susceptible to Twinklink Plus (Cry1Ab + Cry2Ae + Vip3A) and Widestrike 3 (Cry1Ac + Cry1F + Vip3A).  On leaf tissue, Cry1F FAW were less susceptible to Bollgard II (Cry1Ac + Cry2Ab) than to Twinlink (Cry1Ab + Cry2Ae), but were more susceptible on squares.

See more of: Contributed Papers II: P-IE – IPM; P-IE – Resistance Management; P-IE – Transgenic Plants
See more of: Ten Minute Paper (TMP) Oral
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