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Monday, 15 November 2004 - 10:54 AM
0051
Characterization of Cry1F resistance in laboratory selected European corn borer, Ostrinia nubilalis (Lepidoptera: Crambidae)
Eliseu Pereira, eliseu@unlserve.unl.edu1, Herbert Siqueira, siqueira@unlserve.unl.edu1, Nick Storer, nstorer@dow.com2, and Blair D. Siegfried, bsiegfried1@unl.edu1. (1) University of Nebraska, Department of Entomology, 202 Plant Industry Bldg, Lincoln, NE, (2) Dow AgroSciences, 9330 Zionsville Rd, Indianapolis, IN
We have been researching the Cry1F resistance in a colony of Ostrinia nubilalis (Hübner) that was selected in the laboratory for high levels of resistance to Cry1F. From our previous experiments we determined that the selected strain exhibits more than 3000-fold resistance to Cry1F, has no cross resistance to Cry1Ab and Cry9C, and has a low level of cross resistance to Cry1Ac. Additionally, genetic experiments indicate that the resistance is autosomal and almost completely recessive, and that a single gene is responsible for the resistance. Experiments designed to assess the mechanism of resistance are currently in progress.
Species 1: Lepidoptera Crambidae Ostrinia nubililalis (European corn borer)
Keywords: Bacillus thuringiensis, Resistance Management
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