Evolution of asian corn borer resistance to Bt Toxins used singly or in Pairs

Yueqin Wang, Yudong Quan, Jing Yang, Changlong Shu, Zhenying Wang, Jie Zhang, Angharad M.R. Gatehouse, Bruce E. Tabashnik, Kanglai He

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Transgenic crops producing insecticidal proteins from Bacillus thuringiensis (Bt) have revolutionized pest control, but the benefits of this approach have been reduced by the evolution of resistance in pests. The widely adopted ’pyramid strategy’ for delaying resistance entails transgenic crops producing two or more distinct toxins that kill the same pest. The limited experimental evidence supporting this strategy comes primarily from a model system under ideal conditions. Here we tested the pyramid strategy under nearly worst-case conditions, including some cross-resistance between the toxins in the pyramid. In a laboratory selection experiment with an artificial diet, we used Bt toxins Cry1Ab, Cry1F, and Cry1Ie singly or in pairs against Ostrinia furnacalis, one of the most destructive pests of corn in Asia. Under the conditions evaluated, pairs of toxins did not consistently delay the evolution of resistance relative to single toxins.

Original languageEnglish (US)
Article number461
JournalToxins
Volume11
Issue number8
DOIs
StatePublished - Aug 2019

Keywords

  • Bacillus thuringiensis
  • Cry toxin
  • Ostrinia furnacalis
  • Pyramid strategy
  • Resistance

ASJC Scopus subject areas

  • Toxicology
  • Health, Toxicology and Mutagenesis

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    Wang, Y., Quan, Y., Yang, J., Shu, C., Wang, Z., Zhang, J., Gatehouse, A. M. R., Tabashnik, B. E., & He, K. (2019). Evolution of asian corn borer resistance to Bt Toxins used singly or in Pairs. Toxins, 11(8), [461]. https://doi.org/10.3390/toxins11080461