Cross-resistance of pink bollworm (Pectinophora gossypiella) to Bacillus thuringiensis toxins.
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.
Tabashnik
B E
BE
Department of Entomology, University of Arizona, Tucson, Arizona 85721, USA. brucet@ag.arizona.edu
Liu
Y B
YB
de Maagd
R A
RA
Dennehy
T J
TJ
D000818:Animals; D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins / Q000633:toxicity*; D001427:Bacterial Toxins; D004351:Drug Resistance; D004731:Endotoxins / Q000633:toxicity*; D006460:Hemolysin Proteins; D007915:Lepidoptera / Q000145:classification; D013045:Species Specificity
D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins; D001427:Bacterial Toxins; D004731:Endotoxins; D006460:Hemolysin Proteins; C030956:insecticidal crystal protein, Bacillus Thuringiensis