Cross-resistance of pink bollworm (Pectinophora gossypiella) to Bacillus thuringiensis toxins |
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| Authors: | Tabashnik B E Liu Y B de Maagd R A Dennehy T J |
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| Institution: | Department of Entomology, University of Arizona, Tucson, Arizona 85721, USA. brucet@ag.arizona.edu |
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| Abstract: | 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. |
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