1994•Applied and Environmental MicrobiologyOpen access

Cross-Resistance to Bacillus thuringiensis Toxin CryIF in the Diamondback Moth ( Plutella xylostella )

Bruce E. Tabashnik, Naomi Finson, Marshall W. Johnson, David G. Heckel

Abstract

Selection with Bacillus thuringiensis subsp. kurstaki, which contains CryIA and CryII toxins, caused a >200-fold cross-resistance to CryIF toxin from B. thuringiensis subsp. aizawai in the diamondback moth, Plutella xylostella. CryIE was not toxic, but CryIB was highly toxic to both selected and unselected larvae. The results show that extremely high levels of cross-resistance can be conferred across classes of CryI toxins of B. thuringiensis.

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Key concepts: Plutella, Diamondback moth, Bacillus thuringiensis, Biology, Microbiology, Bacillales, Cross-resistance, Toxin