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Applied and Environmental Microbiology, October 2000, p. 4582-4584, Vol. 66, No. 10
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Cross-Resistance of Pink Bollworm (Pectinophora gossypiella) to Bacillus thuringiensis Toxins

Bruce E. Tabashnik,1,* Yong-Biao Liu,1 Ruud A. de Maagd,2 and Timothy J. Dennehy1

Department of Entomology, University of Arizona, Tucson, Arizona 85721,1 and Business Unit Cell Cybernetics, Plant Research International, 6700 AA Wageningen, The Netherlands2

Received 14 April 2000/Accepted 12 July 2000

Two strains of pink bollworm (Pectinophora gossypiella) selected in the laboratory for resistance to Bacillus thuringiensis toxin Cry1Ac had substantial cross-resistance to Cry1Aa and Cry1Ab but not to Cry1Bb, Cry1Ca, Cry1Da, Cry1Ea, Cry1Ja, Cry2Aa, Cry9Ca, H04, or H205. The narrow spectrum of resistance and the cross-resistance to activated toxin Cry1Ab suggest that reduced binding of toxin to midgut target sites could be an important mechanism of resistance.

* Corresponding author. Mailing address: Department of Entomology, University of Arizona, 410 Forbes, 1140 S. Campus Dr., Tucson, AZ 85721. Phone: (520) 621-1141. Fax: (520) 621-1150. E-mail: brucet{at}ag.arizona.edu.

Applied and Environmental Microbiology, October 2000, p. 4582-4584, Vol. 66, No. 10
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


This article has been cited by other articles:

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