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Cross-resistance of pink bollworm (Pectinophora gossypiella) to Bacillus thuringiensis toxins.

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.

SUBMITTER: Tabashnik BE

PROVIDER: S-EPMC92349 | biostudies-literature | 2000 Oct

REPOSITORIES: biostudies-literature

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Cross-resistance of pink bollworm (Pectinophora gossypiella) to Bacillus thuringiensis toxins.

Tabashnik B E BE Liu Y B YB de Maagd R A RA Dennehy T J TJ

Applied and environmental microbiology 20001001 10

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. ...[more]

PMID: 11010923

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