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Cross-resistance between a Bacillus thuringiensis Cry toxin and non-Bt insecticides in the diamondback moth by Ali H Sayyed; Graham Moores; Neil Crickmore; Denis J Wright is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Cross-resistance between a Bacillus thuringiensis Cry toxin and non-Bt insecticides in the diamondback moth about?

## Abstract **BACKGROUND:** __Bacillus thuringiensis__ Berliner (__Bt__) crystal (Cry) toxins are expressed in various transgenic crops and are also used as sprays in integrated pest management and organic agricultural systems. The diamondback moth (__Plutella xylostella__ L.) is a major worldwide pest of crucifer crops and one that has readily acquired field resistance to a broad range of insecticides. **RESULTS:** Selection of a subpopulation of the __P. xylostella__ SERD4 population with the pyrethroid deltamethrin increased resistance to both deltamethrin and Cry1Ac relative to an unselected subpopulation. Selection of a second subpopulation with the __Bt__ toxin Cry1Ac also increased resistance to both Cry1Ac and deltamethrin. A complementation test between the Cry1Ac‐selected and deltamethrin‐selected subpopulations suggested the presence of a common genetic locus or loci that control resistance to both insecticides. A piperonyl butoxide analogue with potent inhibitory activity against insect esterases significantly increased the toxicity of Cry1Ac and deltamethrin against the respective resistant subpopulations, but showed no such synergism with the unselected subpopulation

Who reads Cross-resistance between a Bacillus thuringiensis Cry toxin and non-Bt insecticides in the diamondback moth?

Author

Ali H Sayyed; Graham Moores; Neil Crickmore; Denis J Wright

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1526-498X)

Published

2008

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)