Skip to main content
Article
Frequency of Resistance to Bacillus thuringiensis Toxin Cry1Ab in an Iowa Population of European Corn Borer (Lepidoptera: Crambidae)
Journal of Economic Entomology
  • D. A. Andow, University of Minnesota - Twin Cities
  • D. M. Olson, University of Minnesota - Twin Cities
  • Richard L. Hellmich, Iowa State University
  • D. N. Alstad, University of Minnesota - Twin Cities
  • W. D. Hutchison, University of Minnesota - Twin Cities
Document Type
Article
Publication Date
2-1-2000
DOI
10.1603/0022-0493-93.1.26
Abstract
The refuge plus high-dose strategy for resistance management assumes that the frequency of resistance alleles is low. We used an F2 screen to estimate the frequency of resistance to transgenic corn that produces Bacillus thuringiensis Berliner Cry1Ab toxin (Bt corn) in an Iowa population of European corn borer, Ostrinia nubilalis (Hu¨ bner). We also proposed a modiÞcation to the statistical analysis of the F2 screen that extends its application for nonuniform prior distributions and for repeated sampling of a single population. Based on a sample of 188 isofemale lines derived from females caught at light traps during the 2nd ßight of 1997, we show with 95% conÞdence that the frequency of resistance to Bt corn was ,3.9 3 1023 in this Iowa population. These results provide weak evidence that the refuge plus high-dose strategy may be effective for managing resistance in O. nubilalis to Bt corn. Partial resistance to Cry1Ab toxin was found commonly. The 95% CI for the frequency of partial resistance were [8.231024, 9.431023] for the Iowa population. Variable costs of the method were $14.90 per isofemale line, which was a reduction of 25% compared with our initial estimate.
Comments

This article is from Journal of Economic Entomology 93 (2000); 26-30; doi: 10.1603/0022-0493-93.1.26

Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Copyright Owner
Entomological Society of America
Language
en
Date Available
2014-08-20
File Format
application/pdf
Citation Information
D. A. Andow, D. M. Olson, Richard L. Hellmich, D. N. Alstad, et al.. "Frequency of Resistance to Bacillus thuringiensis Toxin Cry1Ab in an Iowa Population of European Corn Borer (Lepidoptera: Crambidae)" Journal of Economic Entomology Vol. 93 Iss. 1 (2000) p. 26 - 30
Available at: http://works.bepress.com/richard_hellmich/31/