Successes and challenges of managing resistance in Helicoverpa armigera to Bt cotton in Australia

GM Crops & Food
Sharon J Downes, Rod J Mahon

Abstract

Bt cotton has been gradually released and adopted by Australian growers since 1996. It was initially deployed in Australia primarily to control the polyphagous pest Helicoverpa armigera (Hübner), which in the 1990s became increasingly difficult to control due to widespread resistance to synthetic chemical insecticides. Bt-cotton has become a key tool in a program of integrated pest management for the production system that reduces pesticide dependence and the problems associated with its use. Herein we overview the deployment of Bt cotton in Australia including its performance and the approaches used to prolong the evolution of resistance to it by H. armigera. An integral component of this approach is monitoring resistance in this pest. We outline resistance screening methods, as well as the characteristics of resistant strains of H. armigera that have been isolated from field populations, or selected in the laboratory. We then highlight the successes and challenges for Bt cotton in Australia by way of discussing adaptive resistance management in light of potential changes in resistance.

References

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Apr 28, 2012·Journal of Invertebrate Pathology·Sharon Downes, Rod Mahon

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Citations

Jun 12, 2013·Nature Biotechnology·Bruce E TabashnikYves Carrière
Apr 28, 2012·Journal of Invertebrate Pathology·Sharon Downes, Rod Mahon
Jul 6, 2016·Journal of Chemical Ecology·Peter C GreggMatthew R Binns
May 25, 2018·EFSA Journal·UNKNOWN European Food Safety Authority (EFSA)Elisabeth Waigmann

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